diff options
Diffstat (limited to 'arch/microblaze/kernel')
34 files changed, 7676 insertions, 0 deletions
diff --git a/arch/microblaze/kernel/Makefile b/arch/microblaze/kernel/Makefile new file mode 100644 index 000000000000..da94bec4ecba --- /dev/null +++ b/arch/microblaze/kernel/Makefile @@ -0,0 +1,19 @@ +# +# Makefile +# + +extra-y := head.o vmlinux.lds + +obj-y += exceptions.o \ + hw_exception_handler.o init_task.o intc.o irq.o of_device.o \ + of_platform.o process.o prom.o prom_parse.o ptrace.o \ + setup.o signal.o sys_microblaze.o timer.o traps.o + +obj-y += cpu/ + +obj-$(CONFIG_EARLY_PRINTK) += early_printk.o +obj-$(CONFIG_SELFMOD) += selfmod.o +obj-$(CONFIG_HEART_BEAT) += heartbeat.o +obj-$(CONFIG_MODULES) += microblaze_ksyms.o module.o + +obj-y += entry$(MMUEXT).o diff --git a/arch/microblaze/kernel/asm-offsets.c b/arch/microblaze/kernel/asm-offsets.c new file mode 100644 index 000000000000..aabd9e9423a6 --- /dev/null +++ b/arch/microblaze/kernel/asm-offsets.c @@ -0,0 +1,115 @@ +/* + * Copyright (C) 2007-2009 PetaLogix + * Copyright (C) 2006 Atmark Techno, Inc. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include <linux/init.h> +#include <linux/stddef.h> +#include <linux/sched.h> +#include <linux/kernel_stat.h> +#include <linux/ptrace.h> +#include <linux/hardirq.h> +#include <linux/thread_info.h> +#include <linux/kbuild.h> + +int main(int argc, char *argv[]) +{ + /* struct pt_regs */ + DEFINE(PT_SIZE, sizeof(struct pt_regs)); + DEFINE(PT_MSR, offsetof(struct pt_regs, msr)); + DEFINE(PT_EAR, offsetof(struct pt_regs, ear)); + DEFINE(PT_ESR, offsetof(struct pt_regs, esr)); + DEFINE(PT_FSR, offsetof(struct pt_regs, fsr)); + DEFINE(PT_PC, offsetof(struct pt_regs, pc)); + DEFINE(PT_R0, offsetof(struct pt_regs, r0)); + DEFINE(PT_R1, offsetof(struct pt_regs, r1)); + DEFINE(PT_R2, offsetof(struct pt_regs, r2)); + DEFINE(PT_R3, offsetof(struct pt_regs, r3)); + DEFINE(PT_R4, offsetof(struct pt_regs, r4)); + DEFINE(PT_R5, offsetof(struct pt_regs, r5)); + DEFINE(PT_R6, offsetof(struct pt_regs, r6)); + DEFINE(PT_R7, offsetof(struct pt_regs, r7)); + DEFINE(PT_R8, offsetof(struct pt_regs, r8)); + DEFINE(PT_R9, offsetof(struct pt_regs, r9)); + DEFINE(PT_R10, offsetof(struct pt_regs, r10)); + DEFINE(PT_R11, offsetof(struct pt_regs, r11)); + DEFINE(PT_R12, offsetof(struct pt_regs, r12)); + DEFINE(PT_R13, offsetof(struct pt_regs, r13)); + DEFINE(PT_R14, offsetof(struct pt_regs, r14)); + DEFINE(PT_R15, offsetof(struct pt_regs, r15)); + DEFINE(PT_R16, offsetof(struct pt_regs, r16)); + DEFINE(PT_R17, offsetof(struct pt_regs, r17)); + DEFINE(PT_R18, offsetof(struct pt_regs, r18)); + DEFINE(PT_R19, offsetof(struct pt_regs, r19)); + DEFINE(PT_R20, offsetof(struct pt_regs, r20)); + DEFINE(PT_R21, offsetof(struct pt_regs, r21)); + DEFINE(PT_R22, offsetof(struct pt_regs, r22)); + DEFINE(PT_R23, offsetof(struct pt_regs, r23)); + DEFINE(PT_R24, offsetof(struct pt_regs, r24)); + DEFINE(PT_R25, offsetof(struct pt_regs, r25)); + DEFINE(PT_R26, offsetof(struct pt_regs, r26)); + DEFINE(PT_R27, offsetof(struct pt_regs, r27)); + DEFINE(PT_R28, offsetof(struct pt_regs, r28)); + DEFINE(PT_R29, offsetof(struct pt_regs, r29)); + DEFINE(PT_R30, offsetof(struct pt_regs, r30)); + DEFINE(PT_R31, offsetof(struct pt_regs, r31)); + DEFINE(PT_MODE, offsetof(struct pt_regs, pt_mode)); + BLANK(); + + /* Magic offsets for PTRACE PEEK/POKE etc */ + DEFINE(PT_TEXT_ADDR, sizeof(struct pt_regs) + 1); + DEFINE(PT_TEXT_LEN, sizeof(struct pt_regs) + 2); + DEFINE(PT_DATA_ADDR, sizeof(struct pt_regs) + 3); + BLANK(); + + /* struct task_struct */ + DEFINE(TS_THREAD_INFO, offsetof(struct task_struct, stack)); + + /* struct thread_info */ + DEFINE(TI_TASK, offsetof(struct thread_info, task)); + DEFINE(TI_EXEC_DOMAIN, offsetof(struct thread_info, exec_domain)); + DEFINE(TI_FLAGS, offsetof(struct thread_info, flags)); + DEFINE(TI_STATUS, offsetof(struct thread_info, status)); + DEFINE(TI_CPU, offsetof(struct thread_info, cpu)); + DEFINE(TI_PRE_COUNT, offsetof(struct thread_info, preempt_count)); + DEFINE(TI_ADDR_LIMIT, offsetof(struct thread_info, addr_limit)); + DEFINE(TI_RESTART_BLOCK, offsetof(struct thread_info, restart_block)); + DEFINE(TI_CPU_CONTEXT, offsetof(struct thread_info, cpu_context)); + BLANK(); + + /* struct cpu_context */ + DEFINE(CC_R1, offsetof(struct cpu_context, r1)); /* r1 */ + DEFINE(CC_R2, offsetof(struct cpu_context, r2)); + /* dedicated registers */ + DEFINE(CC_R13, offsetof(struct cpu_context, r13)); + DEFINE(CC_R14, offsetof(struct cpu_context, r14)); + DEFINE(CC_R15, offsetof(struct cpu_context, r15)); + DEFINE(CC_R16, offsetof(struct cpu_context, r16)); + DEFINE(CC_R17, offsetof(struct cpu_context, r17)); + DEFINE(CC_R18, offsetof(struct cpu_context, r18)); + /* non-volatile registers */ + DEFINE(CC_R19, offsetof(struct cpu_context, r19)); + DEFINE(CC_R20, offsetof(struct cpu_context, r20)); + DEFINE(CC_R21, offsetof(struct cpu_context, r21)); + DEFINE(CC_R22, offsetof(struct cpu_context, r22)); + DEFINE(CC_R23, offsetof(struct cpu_context, r23)); + DEFINE(CC_R24, offsetof(struct cpu_context, r24)); + DEFINE(CC_R25, offsetof(struct cpu_context, r25)); + DEFINE(CC_R26, offsetof(struct cpu_context, r26)); + DEFINE(CC_R27, offsetof(struct cpu_context, r27)); + DEFINE(CC_R28, offsetof(struct cpu_context, r28)); + DEFINE(CC_R29, offsetof(struct cpu_context, r29)); + DEFINE(CC_R30, offsetof(struct cpu_context, r30)); + /* special purpose registers */ + DEFINE(CC_MSR, offsetof(struct cpu_context, msr)); + DEFINE(CC_EAR, offsetof(struct cpu_context, ear)); + DEFINE(CC_ESR, offsetof(struct cpu_context, esr)); + DEFINE(CC_FSR, offsetof(struct cpu_context, fsr)); + BLANK(); + + return 0; +} diff --git a/arch/microblaze/kernel/cpu/Makefile b/arch/microblaze/kernel/cpu/Makefile new file mode 100644 index 000000000000..20646e549271 --- /dev/null +++ b/arch/microblaze/kernel/cpu/Makefile @@ -0,0 +1,8 @@ +# +# Build the appropriate CPU version support +# + +EXTRA_CFLAGS += -DCPU_MAJOR=$(CPU_MAJOR) -DCPU_MINOR=$(CPU_MINOR) \ + -DCPU_REV=$(CPU_REV) + +obj-y += cache.o cpuinfo.o cpuinfo-pvr-full.o cpuinfo-static.o mb.o pvr.o diff --git a/arch/microblaze/kernel/cpu/cache.c b/arch/microblaze/kernel/cpu/cache.c new file mode 100644 index 000000000000..af866a450125 --- /dev/null +++ b/arch/microblaze/kernel/cpu/cache.c @@ -0,0 +1,255 @@ +/* + * Cache control for MicroBlaze cache memories + * + * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2007-2009 PetaLogix + * Copyright (C) 2007 John Williams <john.williams@petalogix.com> + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file COPYING in the main directory of this + * archive for more details. + */ + +#include <asm/cacheflush.h> +#include <linux/cache.h> +#include <asm/cpuinfo.h> + +/* Exported functions */ + +void _enable_icache(void) +{ + if (cpuinfo.use_icache) { +#if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR + __asm__ __volatile__ (" \ + msrset r0, %0; \ + nop; " \ + : \ + : "i" (MSR_ICE) \ + : "memory"); +#else + __asm__ __volatile__ (" \ + mfs r12, rmsr; \ + nop; \ + ori r12, r12, %0; \ + mts rmsr, r12; \ + nop; " \ + : \ + : "i" (MSR_ICE) \ + : "memory", "r12"); +#endif + } +} + +void _disable_icache(void) +{ + if (cpuinfo.use_icache) { +#if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR + __asm__ __volatile__ (" \ + msrclr r0, %0; \ + nop; " \ + : \ + : "i" (MSR_ICE) \ + : "memory"); +#else + __asm__ __volatile__ (" \ + mfs r12, rmsr; \ + nop; \ + andi r12, r12, ~%0; \ + mts rmsr, r12; \ + nop; " \ + : \ + : "i" (MSR_ICE) \ + : "memory", "r12"); +#endif + } +} + +void _invalidate_icache(unsigned int addr) +{ + if (cpuinfo.use_icache) { + __asm__ __volatile__ (" \ + wic %0, r0" \ + : \ + : "r" (addr)); + } +} + +void _enable_dcache(void) +{ + if (cpuinfo.use_dcache) { +#if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR + __asm__ __volatile__ (" \ + msrset r0, %0; \ + nop; " \ + : \ + : "i" (MSR_DCE) \ + : "memory"); +#else + __asm__ __volatile__ (" \ + mfs r12, rmsr; \ + nop; \ + ori r12, r12, %0; \ + mts rmsr, r12; \ + nop; " \ + : \ + : "i" (MSR_DCE) \ + : "memory", "r12"); +#endif + } +} + +void _disable_dcache(void) +{ +#if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR + __asm__ __volatile__ (" \ + msrclr r0, %0; \ + nop; " \ + : \ + : "i" (MSR_DCE) \ + : "memory"); +#else + __asm__ __volatile__ (" \ + mfs r12, rmsr; \ + nop; \ + andi r12, r12, ~%0; \ + mts rmsr, r12; \ + nop; " \ + : \ + : "i" (MSR_DCE) \ + : "memory", "r12"); +#endif +} + +void _invalidate_dcache(unsigned int addr) +{ + __asm__ __volatile__ (" \ + wdc %0, r0" \ + : \ + : "r" (addr)); +} + +void __invalidate_icache_all(void) +{ + unsigned int i; + unsigned flags; + + if (cpuinfo.use_icache) { + local_irq_save(flags); + __disable_icache(); + + /* Just loop through cache size and invalidate, no need to add + CACHE_BASE address */ + for (i = 0; i < cpuinfo.icache_size; + i += cpuinfo.icache_line) + __invalidate_icache(i); + + __enable_icache(); + local_irq_restore(flags); + } +} + +void __invalidate_icache_range(unsigned long start, unsigned long end) +{ + unsigned int i; + unsigned flags; + unsigned int align; + + if (cpuinfo.use_icache) { + /* + * No need to cover entire cache range, + * just cover cache footprint + */ + end = min(start + cpuinfo.icache_size, end); + align = ~(cpuinfo.icache_line - 1); + start &= align; /* Make sure we are aligned */ + /* Push end up to the next cache line */ + end = ((end & align) + cpuinfo.icache_line); + + local_irq_save(flags); + __disable_icache(); + + for (i = start; i < end; i += cpuinfo.icache_line) + __invalidate_icache(i); + + __enable_icache(); + local_irq_restore(flags); + } +} + +void __invalidate_icache_page(struct vm_area_struct *vma, struct page *page) +{ + __invalidate_icache_all(); +} + +void __invalidate_icache_user_range(struct vm_area_struct *vma, + struct page *page, unsigned long adr, + int len) +{ + __invalidate_icache_all(); +} + +void __invalidate_cache_sigtramp(unsigned long addr) +{ + __invalidate_icache_range(addr, addr + 8); +} + +void __invalidate_dcache_all(void) +{ + unsigned int i; + unsigned flags; + + if (cpuinfo.use_dcache) { + local_irq_save(flags); + __disable_dcache(); + + /* + * Just loop through cache size and invalidate, + * no need to add CACHE_BASE address + */ + for (i = 0; i < cpuinfo.dcache_size; + i += cpuinfo.dcache_line) + __invalidate_dcache(i); + + __enable_dcache(); + local_irq_restore(flags); + } +} + +void __invalidate_dcache_range(unsigned long start, unsigned long end) +{ + unsigned int i; + unsigned flags; + unsigned int align; + + if (cpuinfo.use_dcache) { + /* + * No need to cover entire cache range, + * just cover cache footprint + */ + end = min(start + cpuinfo.dcache_size, end); + align = ~(cpuinfo.dcache_line - 1); + start &= align; /* Make sure we are aligned */ + /* Push end up to the next cache line */ + end = ((end & align) + cpuinfo.dcache_line); + local_irq_save(flags); + __disable_dcache(); + + for (i = start; i < end; i += cpuinfo.dcache_line) + __invalidate_dcache(i); + + __enable_dcache(); + local_irq_restore(flags); + } +} + +void __invalidate_dcache_page(struct vm_area_struct *vma, struct page *page) +{ + __invalidate_dcache_all(); +} + +void __invalidate_dcache_user_range(struct vm_area_struct *vma, + struct page *page, unsigned long adr, + int len) +{ + __invalidate_dcache_all(); +} diff --git a/arch/microblaze/kernel/cpu/cpuinfo-pvr-full.c b/arch/microblaze/kernel/cpu/cpuinfo-pvr-full.c new file mode 100644 index 000000000000..153f57c57b6d --- /dev/null +++ b/arch/microblaze/kernel/cpu/cpuinfo-pvr-full.c @@ -0,0 +1,106 @@ +/* + * Support for MicroBlaze PVR (processor version register) + * + * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2007-2009 PetaLogix + * Copyright (C) 2007 John Williams <john.williams@petalogix.com> + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include <linux/init.h> +#include <linux/string.h> +#include <asm/pvr.h> +#include <asm/cpuinfo.h> + +/* + * Helper macro to map between fields in our struct cpuinfo, and + * the PVR macros in pvr.h. + */ + +#define CI(c, p) { ci->c = PVR_##p(pvr); } +#define err_printk(x) \ + early_printk("ERROR: Microblaze " x " - different for PVR and DTS\n"); + +void set_cpuinfo_pvr_full(struct cpuinfo *ci, struct device_node *cpu) +{ + struct pvr_s pvr; + int temp; /* for saving temp value */ + get_pvr(&pvr); + + CI(ver_code, VERSION); + if (!ci->ver_code) { + printk(KERN_ERR "ERROR: MB has broken PVR regs " + "-> use DTS setting\n"); + return; + } + + temp = PVR_USE_BARREL(pvr) | PVR_USE_MSR_INSTR(pvr) |\ + PVR_USE_PCMP_INSTR(pvr) | PVR_USE_DIV(pvr); + if (ci->use_instr != temp) + err_printk("BARREL, MSR, PCMP or DIV"); + ci->use_instr = temp; + + temp = PVR_USE_HW_MUL(pvr) | PVR_USE_MUL64(pvr); + if (ci->use_mult != temp) + err_printk("HW_MUL"); + ci->use_mult = temp; + + temp = PVR_USE_FPU(pvr) | PVR_USE_FPU2(pvr); + if (ci->use_fpu != temp) + err_printk("HW_FPU"); + ci->use_fpu = temp; + + ci->use_exc = PVR_OPCODE_0x0_ILLEGAL(pvr) |\ + PVR_UNALIGNED_EXCEPTION(pvr) |\ + PVR_ILL_OPCODE_EXCEPTION(pvr) |\ + PVR_IOPB_BUS_EXCEPTION(pvr) |\ + PVR_DOPB_BUS_EXCEPTION(pvr) |\ + PVR_DIV_ZERO_EXCEPTION(pvr) |\ + PVR_FPU_EXCEPTION(pvr) |\ + PVR_FSL_EXCEPTION(pvr); + + CI(pvr_user1, USER1); + CI(pvr_user2, USER2); + + CI(mmu, USE_MMU); + + CI(use_icache, USE_ICACHE); + CI(icache_tagbits, ICACHE_ADDR_TAG_BITS); + CI(icache_write, ICACHE_ALLOW_WR); + CI(icache_line, ICACHE_LINE_LEN); + CI(icache_size, ICACHE_BYTE_SIZE); + CI(icache_base, ICACHE_BASEADDR); + CI(icache_high, ICACHE_HIGHADDR); + + CI(use_dcache, USE_DCACHE); + CI(dcache_tagbits, DCACHE_ADDR_TAG_BITS); + CI(dcache_write, DCACHE_ALLOW_WR); + CI(dcache_line, DCACHE_LINE_LEN); + CI(dcache_size, DCACHE_BYTE_SIZE); + CI(dcache_base, DCACHE_BASEADDR); + CI(dcache_high, DCACHE_HIGHADDR); + + CI(use_dopb, D_OPB); + CI(use_iopb, I_OPB); + CI(use_dlmb, D_LMB); + CI(use_ilmb, I_LMB); + CI(num_fsl, FSL_LINKS); + + CI(irq_edge, INTERRUPT_IS_EDGE); + CI(irq_positive, EDGE_IS_POSITIVE); + + CI(area_optimised, AREA_OPTIMISED); + + CI(hw_debug, DEBUG_ENABLED); + CI(num_pc_brk, NUMBER_OF_PC_BRK); + CI(num_rd_brk, NUMBER_OF_RD_ADDR_BRK); + CI(num_wr_brk, NUMBER_OF_WR_ADDR_BRK); + + CI(fpga_family_code, TARGET_FAMILY); + + /* take timebase-frequency from DTS */ + ci->cpu_clock_freq = fcpu(cpu, "timebase-frequency"); +} diff --git a/arch/microblaze/kernel/cpu/cpuinfo-static.c b/arch/microblaze/kernel/cpu/cpuinfo-static.c new file mode 100644 index 000000000000..cfe44effdb77 --- /dev/null +++ b/arch/microblaze/kernel/cpu/cpuinfo-static.c @@ -0,0 +1,144 @@ +/* + * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2007-2009 PetaLogix + * Copyright (C) 2007 John Williams <john.williams@petalogix.com> + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/string.h> +#include <asm/cpuinfo.h> +#include <asm/pvr.h> + +const static char family_string[] = CONFIG_XILINX_MICROBLAZE0_FAMILY; +const static char cpu_ver_string[] = CONFIG_XILINX_MICROBLAZE0_HW_VER; + +#define err_printk(x) \ + early_printk("ERROR: Microblaze " x "- different for kernel and DTS\n"); + +void __init set_cpuinfo_static(struct cpuinfo *ci, struct device_node *cpu) +{ + int i = 0; + + ci->use_instr = + (fcpu(cpu, "xlnx,use-barrel") ? PVR0_USE_BARREL_MASK : 0) | + (fcpu(cpu, "xlnx,use-msr-instr") ? PVR2_USE_MSR_INSTR : 0) | + (fcpu(cpu, "xlnx,use-pcmp-instr") ? PVR2_USE_PCMP_INSTR : 0) | + (fcpu(cpu, "xlnx,use-div") ? PVR0_USE_DIV_MASK : 0); + if (CONFIG_XILINX_MICROBLAZE0_USE_BARREL) + i |= PVR0_USE_BARREL_MASK; + if (CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR) + i |= PVR2_USE_MSR_INSTR; + if (CONFIG_XILINX_MICROBLAZE0_USE_PCMP_INSTR) + i |= PVR2_USE_PCMP_INSTR; + if (CONFIG_XILINX_MICROBLAZE0_USE_DIV) + i |= PVR0_USE_DIV_MASK; + if (ci->use_instr != i) + err_printk("BARREL, MSR, PCMP or DIV"); + + ci->use_mult = fcpu(cpu, "xlnx,use-hw-mul"); + if (ci->use_mult != CONFIG_XILINX_MICROBLAZE0_USE_HW_MUL) + err_printk("HW_MUL"); + ci->use_mult = + (ci->use_mult > 1 ? + (PVR2_USE_MUL64_MASK | PVR0_USE_HW_MUL_MASK) : + (ci->use_mult == 1 ? PVR0_USE_HW_MUL_MASK : 0)); + + ci->use_fpu = fcpu(cpu, "xlnx,use-fpu"); + if (ci->use_fpu != CONFIG_XILINX_MICROBLAZE0_USE_FPU) + err_printk("HW_FPU"); + ci->use_fpu = (ci->use_fpu > 1 ? + (PVR2_USE_FPU2_MASK | PVR0_USE_FPU_MASK) : + (ci->use_fpu == 1 ? PVR0_USE_FPU_MASK : 0)); + + ci->use_exc = + (fcpu(cpu, "xlnx,unaligned-exceptions") ? + PVR2_UNALIGNED_EXC_MASK : 0) | + (fcpu(cpu, "xlnx,ill-opcode-exception") ? + PVR2_ILL_OPCODE_EXC_MASK : 0) | + (fcpu(cpu, "xlnx,iopb-bus-exception") ? + PVR2_IOPB_BUS_EXC_MASK : 0) | + (fcpu(cpu, "xlnx,dopb-bus-exception") ? + PVR2_DOPB_BUS_EXC_MASK : 0) | + (fcpu(cpu, "xlnx,div-zero-exception") ? + PVR2_DIV_ZERO_EXC_MASK : 0) | + (fcpu(cpu, "xlnx,fpu-exception") ? PVR2_FPU_EXC_MASK : 0) | + (fcpu(cpu, "xlnx,fsl-exception") ? PVR2_USE_EXTEND_FSL : 0); + + ci->use_icache = fcpu(cpu, "xlnx,use-icache"); + ci->icache_tagbits = fcpu(cpu, "xlnx,addr-tag-bits"); + ci->icache_write = fcpu(cpu, "xlnx,allow-icache-wr"); + ci->icache_line = fcpu(cpu, "xlnx,icache-line-len") << 2; + if (!ci->icache_line) { + if (fcpu(cpu, "xlnx,icache-use-fsl")) + ci->icache_line = 4 << 2; + else + ci->icache_line = 1 << 2; + } + ci->icache_size = fcpu(cpu, "i-cache-size"); + ci->icache_base = fcpu(cpu, "i-cache-baseaddr"); + ci->icache_high = fcpu(cpu, "i-cache-highaddr"); + + ci->use_dcache = fcpu(cpu, "xlnx,use-dcache"); + ci->dcache_tagbits = fcpu(cpu, "xlnx,dcache-addr-tag"); + ci->dcache_write = fcpu(cpu, "xlnx,allow-dcache-wr"); + ci->dcache_line = fcpu(cpu, "xlnx,dcache-line-len") << 2; + if (!ci->dcache_line) { + if (fcpu(cpu, "xlnx,dcache-use-fsl")) + ci->dcache_line = 4 << 2; + else + ci->dcache_line = 1 << 2; + } + ci->dcache_size = fcpu(cpu, "d-cache-size"); + ci->dcache_base = fcpu(cpu, "d-cache-baseaddr"); + ci->dcache_high = fcpu(cpu, "d-cache-highaddr"); + + ci->use_dopb = fcpu(cpu, "xlnx,d-opb"); + ci->use_iopb = fcpu(cpu, "xlnx,i-opb"); + ci->use_dlmb = fcpu(cpu, "xlnx,d-lmb"); + ci->use_ilmb = fcpu(cpu, "xlnx,i-lmb"); + + ci->num_fsl = fcpu(cpu, "xlnx,fsl-links"); + ci->irq_edge = fcpu(cpu, "xlnx,interrupt-is-edge"); + ci->irq_positive = fcpu(cpu, "xlnx,edge-is-positive"); + ci->area_optimised = 0; + + ci->hw_debug = fcpu(cpu, "xlnx,debug-enabled"); + ci->num_pc_brk = fcpu(cpu, "xlnx,number-of-pc-brk"); + ci->num_rd_brk = fcpu(cpu, "xlnx,number-of-rd-addr-brk"); + ci->num_wr_brk = fcpu(cpu, "xlnx,number-of-wr-addr-brk"); + + ci->cpu_clock_freq = fcpu(cpu, "timebase-frequency"); + + ci->pvr_user1 = fcpu(cpu, "xlnx,pvr-user1"); + ci->pvr_user2 = fcpu(cpu, "xlnx,pvr-user2"); + + ci->mmu = fcpu(cpu, "xlnx,use-mmu"); + + ci->ver_code = 0; + ci->fpga_family_code = 0; + + /* Do various fixups based on CPU version and FPGA family strings */ + + /* Resolved the CPU version code */ + for (i = 0; cpu_ver_lookup[i].s != NULL; i++) { + if (strcmp(cpu_ver_lookup[i].s, cpu_ver_string) == 0) + ci->ver_code = cpu_ver_lookup[i].k; + } + + /* Resolved the fpga family code */ + for (i = 0; family_string_lookup[i].s != NULL; i++) { + if (strcmp(family_string_lookup[i].s, family_string) == 0) + ci->fpga_family_code = family_string_lookup[i].k; + } + + /* FIXME - mb3 and spartan2 do not exist in PVR */ + /* This is mb3 and on a non Spartan2 */ + if (ci->ver_code == 0x20 && ci->fpga_family_code != 0xf0) + /* Hardware Multiplier in use */ + ci->use_mult = 1; +} diff --git a/arch/microblaze/kernel/cpu/cpuinfo.c b/arch/microblaze/kernel/cpu/cpuinfo.c new file mode 100644 index 000000000000..a10bea119b94 --- /dev/null +++ b/arch/microblaze/kernel/cpu/cpuinfo.c @@ -0,0 +1,86 @@ +/* + * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2007-2009 PetaLogix + * Copyright (C) 2007 John Williams <john.williams@petalogix.com> + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include <linux/init.h> +#include <linux/slab.h> +#include <asm/cpuinfo.h> +#include <asm/pvr.h> + +const struct cpu_ver_key cpu_ver_lookup[] = { + /* These key value are as per MBV field in PVR0 */ + {"5.00.a", 0x01}, + {"5.00.b", 0x02}, + {"5.00.c", 0x03}, + {"6.00.a", 0x04}, + {"6.00.b", 0x06}, + {"7.00.a", 0x05}, + {"7.00.b", 0x07}, + {"7.10.a", 0x08}, + {"7.10.b", 0x09}, + {"7.10.c", 0x0a}, + {"7.10.d", 0x0b}, + /* FIXME There is no keycode defined in MBV for these versions */ + {"2.10.a", 0x10}, + {"3.00.a", 0x20}, + {"4.00.a", 0x30}, + {"4.00.b", 0x40}, + {NULL, 0}, +}; + +/* + * FIXME Not sure if the actual key is defined by Xilinx in the PVR + */ +const struct family_string_key family_string_lookup[] = { + {"virtex2", 0x4}, + {"virtex2pro", 0x5}, + {"spartan3", 0x6}, + {"virtex4", 0x7}, + {"virtex5", 0x8}, + {"spartan3e", 0x9}, + {"spartan3a", 0xa}, + {"spartan3an", 0xb}, + {"spartan3adsp", 0xc}, + /* FIXME There is no key code defined for spartan2 */ + {"spartan2", 0xf0}, + {NULL, 0}, +}; + +struct cpuinfo cpuinfo; + +void __init setup_cpuinfo(void) +{ + struct device_node *cpu = NULL; + + cpu = (struct device_node *) of_find_node_by_type(NULL, "cpu"); + if (!cpu) + printk(KERN_ERR "You don't have cpu!!!\n"); + + printk(KERN_INFO "%s: initialising\n", __func__); + + switch (cpu_has_pvr()) { + case 0: + printk(KERN_WARNING + "%s: No PVR support. Using static CPU info from FDT\n", + __func__); + set_cpuinfo_static(&cpuinfo, cpu); + break; +/* FIXME I found weird behavior with MB 7.00.a/b 7.10.a + * please do not use FULL PVR with MMU */ + case 1: + printk(KERN_INFO "%s: Using full CPU PVR support\n", + __func__); + set_cpuinfo_static(&cpuinfo, cpu); + set_cpuinfo_pvr_full(&cpuinfo, cpu); + break; + default: + printk(KERN_WARNING "%s: Unsupported PVR setting\n", __func__); + set_cpuinfo_static(&cpuinfo, cpu); + } +} diff --git a/arch/microblaze/kernel/cpu/mb.c b/arch/microblaze/kernel/cpu/mb.c new file mode 100644 index 000000000000..4dcfccdbc364 --- /dev/null +++ b/arch/microblaze/kernel/cpu/mb.c @@ -0,0 +1,148 @@ +/* + * CPU-version specific code + * + * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2006-2009 PetaLogix + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include <linux/init.h> +#include <linux/string.h> +#include <linux/seq_file.h> +#include <linux/cpu.h> +#include <linux/initrd.h> + +#include <linux/bug.h> +#include <asm/cpuinfo.h> +#include <linux/delay.h> +#include <linux/io.h> +#include <asm/page.h> +#include <linux/param.h> +#include <asm/pvr.h> +#include <asm/sections.h> +#include <asm/setup.h> + +static int show_cpuinfo(struct seq_file *m, void *v) +{ + int count = 0; + char *fpga_family = "Unknown"; + char *cpu_ver = "Unknown"; + int i; + + /* Denormalised to get the fpga family string */ + for (i = 0; family_string_lookup[i].s != NULL; i++) { + if (cpuinfo.fpga_family_code == family_string_lookup[i].k) { + fpga_family = (char *)family_string_lookup[i].s; + break; + } + } + + /* Denormalised to get the hw version string */ + for (i = 0; cpu_ver_lookup[i].s != NULL; i++) { + if (cpuinfo.ver_code == cpu_ver_lookup[i].k) { + cpu_ver = (char *)cpu_ver_lookup[i].s; + break; + } + } + + count = seq_printf(m, + "CPU-Family: MicroBlaze\n" + "FPGA-Arch: %s\n" + "CPU-Ver: %s\n" + "CPU-MHz: %d.%02d\n" + "BogoMips: %lu.%02lu\n", + fpga_family, + cpu_ver, + cpuinfo.cpu_clock_freq / + 1000000, + cpuinfo.cpu_clock_freq % + 1000000, + loops_per_jiffy / (500000 / HZ), + (loops_per_jiffy / (5000 / HZ)) % 100); + + count += seq_printf(m, + "HW:\n Shift:\t\t%s\n" + " MSR:\t\t%s\n" + " PCMP:\t\t%s\n" + " DIV:\t\t%s\n", + (cpuinfo.use_instr & PVR0_USE_BARREL_MASK) ? "yes" : "no", + (cpuinfo.use_instr & PVR2_USE_MSR_INSTR) ? "yes" : "no", + (cpuinfo.use_instr & PVR2_USE_PCMP_INSTR) ? "yes" : "no", + (cpuinfo.use_instr & PVR0_USE_DIV_MASK) ? "yes" : "no"); + + count += seq_printf(m, + " MMU:\t\t%x\n", + cpuinfo.mmu); + + count += seq_printf(m, + " MUL:\t\t%s\n" + " FPU:\t\t%s\n", + (cpuinfo.use_mult & PVR2_USE_MUL64_MASK) ? "v2" : + (cpuinfo.use_mult & PVR0_USE_HW_MUL_MASK) ? "v1" : "no", + (cpuinfo.use_fpu & PVR2_USE_FPU2_MASK) ? "v2" : + (cpuinfo.use_fpu & PVR0_USE_FPU_MASK) ? "v1" : "no"); + + count += seq_printf(m, + " Exc:\t\t%s%s%s%s%s%s%s%s\n", + (cpuinfo.use_exc & PVR2_OPCODE_0x0_ILL_MASK) ? "op0x0 " : "", + (cpuinfo.use_exc & PVR2_UNALIGNED_EXC_MASK) ? "unal " : "", + (cpuinfo.use_exc & PVR2_ILL_OPCODE_EXC_MASK) ? "ill " : "", + (cpuinfo.use_exc & PVR2_IOPB_BUS_EXC_MASK) ? "iopb " : "", + (cpuinfo.use_exc & PVR2_DOPB_BUS_EXC_MASK) ? "dopb " : "", + (cpuinfo.use_exc & PVR2_DIV_ZERO_EXC_MASK) ? "zero " : "", + (cpuinfo.use_exc & PVR2_FPU_EXC_MASK) ? "fpu " : "", + (cpuinfo.use_exc & PVR2_USE_FSL_EXC) ? "fsl " : ""); + + if (cpuinfo.use_icache) + count += seq_printf(m, + "Icache:\t\t%ukB\n", + cpuinfo.icache_size >> 10); + else + count += seq_printf(m, "Icache:\t\tno\n"); + + if (cpuinfo.use_dcache) + count += seq_printf(m, + "Dcache:\t\t%ukB\n", + cpuinfo.dcache_size >> 10); + else + count += seq_printf(m, "Dcache:\t\tno\n"); + + count += seq_printf(m, + "HW-Debug:\t%s\n", + cpuinfo.hw_debug ? "yes" : "no"); + + count += seq_printf(m, + "PVR-USR1:\t%02x\n" + "PVR-USR2:\t%08x\n", + cpuinfo.pvr_user1, + cpuinfo.pvr_user2); + + return 0; +} + +static void *c_start(struct seq_file *m, loff_t *pos) +{ + int i = *pos; + + return i < NR_CPUS ? (void *) (i + 1) : NULL; +} + +static void *c_next(struct seq_file *m, void *v, loff_t *pos) +{ + ++*pos; + return c_start(m, pos); +} + +static void c_stop(struct seq_file *m, void *v) +{ +} + +const struct seq_operations cpuinfo_op = { + .start = c_start, + .next = c_next, + .stop = c_stop, + .show = show_cpuinfo, +}; diff --git a/arch/microblaze/kernel/cpu/pvr.c b/arch/microblaze/kernel/cpu/pvr.c new file mode 100644 index 000000000000..c9a4340ddd53 --- /dev/null +++ b/arch/microblaze/kernel/cpu/pvr.c @@ -0,0 +1,81 @@ +/* + * Support for MicroBlaze PVR (processor version register) + * + * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2007-2009 PetaLogix + * Copyright (C) 2007 John Williams <john.williams@petalogix.com> + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include <linux/kernel.h> +#include <linux/compiler.h> +#include <asm/system.h> +#include <asm/exceptions.h> +#include <asm/pvr.h> + +/* + * Until we get an assembler that knows about the pvr registers, + * this horrible cruft will have to do. + * That hardcoded opcode is mfs r3, rpvrNN + */ + +#define get_single_pvr(pvrid, val) \ +{ \ + register unsigned tmp __asm__("r3"); \ + tmp = 0x0; /* Prevent warning about unused */ \ + __asm__ __volatile__ ( \ + ".byte 0x94,0x60,0xa0, " #pvrid "\n\t" \ + : "=r" (tmp) : : "memory"); \ + val = tmp; \ +} + +/* + * Does the CPU support the PVR register? + * return value: + * 0: no PVR + * 1: simple PVR + * 2: full PVR + * + * This must work on all CPU versions, including those before the + * PVR was even an option. + */ + +int cpu_has_pvr(void) +{ + unsigned flags; + unsigned pvr0; + + local_save_flags(flags); + + /* PVR bit in MSR tells us if there is any support */ + if (!(flags & PVR_MSR_BIT)) + return 0; + + get_single_pvr(0x00, pvr0); + pr_debug("%s: pvr0 is 0x%08x\n", __func__, pvr0); + + if (pvr0 & PVR0_PVR_FULL_MASK) + return 1; + + /* for partial PVR use static cpuinfo */ + return 2; +} + +void get_pvr(struct pvr_s *p) +{ + get_single_pvr(0, p->pvr[0]); + get_single_pvr(1, p->pvr[1]); + get_single_pvr(2, p->pvr[2]); + get_single_pvr(3, p->pvr[3]); + get_single_pvr(4, p->pvr[4]); + get_single_pvr(5, p->pvr[5]); + get_single_pvr(6, p->pvr[6]); + get_single_pvr(7, p->pvr[7]); + get_single_pvr(8, p->pvr[8]); + get_single_pvr(9, p->pvr[9]); + get_single_pvr(10, p->pvr[10]); + get_single_pvr(11, p->pvr[11]); +} diff --git a/arch/microblaze/kernel/early_printk.c b/arch/microblaze/kernel/early_printk.c new file mode 100644 index 000000000000..4b0f0fdb9ca0 --- /dev/null +++ b/arch/microblaze/kernel/early_printk.c @@ -0,0 +1,107 @@ +/* + * Early printk support for Microblaze. + * + * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2007-2009 PetaLogix + * Copyright (C) 2003-2006 Yasushi SHOJI <yashi@atmark-techno.com> + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include <linux/console.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/string.h> +#include <linux/tty.h> +#include <linux/io.h> +#include <asm/processor.h> +#include <linux/fcntl.h> +#include <asm/setup.h> +#include <asm/prom.h> + +static u32 early_console_initialized; +static u32 base_addr; + +static void early_printk_putc(char c) +{ + /* + * Limit how many times we'll spin waiting for TX FIFO status. + * This will prevent lockups if the base address is incorrectly + * set, or any other issue on the UARTLITE. + * This limit is pretty arbitrary, unless we are at about 10 baud + * we'll never timeout on a working UART. + */ + + unsigned retries = 10000; + /* read status bit - 0x8 offset */ + while (--retries && (in_be32(base_addr + 8) & (1 << 3))) + ; + + /* Only attempt the iowrite if we didn't timeout */ + /* write to TX_FIFO - 0x4 offset */ + if (retries) + out_be32(base_addr + 4, c & 0xff); +} + +static void early_printk_write(struct console *unused, + const char *s, unsigned n) +{ + while (*s && n-- > 0) { + early_printk_putc(*s); + if (*s == '\n') + early_printk_putc('\r'); + s++; + } +} + +static struct console early_serial_console = { + .name = "earlyser", + .write = early_printk_write, + .flags = CON_PRINTBUFFER, + .index = -1, +}; + +static struct console *early_console = &early_serial_console; + +void early_printk(const char *fmt, ...) +{ + char buf[512]; + int n; + va_list ap; + + if (early_console_initialized) { + va_start(ap, fmt); + n = vscnprintf(buf, 512, fmt, ap); + early_console->write(early_console, buf, n); + va_end(ap); + } +} + +int __init setup_early_printk(char *opt) +{ + if (early_console_initialized) + return 1; + + base_addr = early_uartlite_console(); + if (base_addr) { + early_console_initialized = 1; + early_printk("early_printk_console is enabled at 0x%08x\n", + base_addr); + + /* register_console(early_console); */ + + return 0; + } else + return 1; +} + +void __init disable_early_printk(void) +{ + if (!early_console_initialized || !early_console) + return; + printk(KERN_WARNING "disabling early console\n"); + unregister_console(early_console); + early_console_initialized = 0; +} diff --git a/arch/microblaze/kernel/entry-nommu.S b/arch/microblaze/kernel/entry-nommu.S new file mode 100644 index 000000000000..f24b1268baaf --- /dev/null +++ b/arch/microblaze/kernel/entry-nommu.S @@ -0,0 +1,596 @@ +/* + * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2007-2009 PetaLogix + * Copyright (C) 2006 Atmark Techno, Inc. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include <linux/linkage.h> +#include <asm/thread_info.h> +#include <asm/errno.h> +#include <asm/entry.h> +#include <asm/asm-offsets.h> +#include <asm/registers.h> +#include <asm/unistd.h> +#include <asm/percpu.h> +#include <asm/signal.h> + +#if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR + .macro disable_irq + msrclr r0, MSR_IE + .endm + + .macro enable_irq + msrset r0, MSR_IE + .endm + + .macro clear_bip + msrclr r0, MSR_BIP + .endm +#else + .macro disable_irq + mfs r11, rmsr + andi r11, r11, ~MSR_IE + mts rmsr, r11 + .endm + + .macro enable_irq + mfs r11, rmsr + ori r11, r11, MSR_IE + mts rmsr, r11 + .endm + + .macro clear_bip + mfs r11, rmsr + andi r11, r11, ~MSR_BIP + mts rmsr, r11 + .endm +#endif + +ENTRY(_interrupt) + swi r1, r0, PER_CPU(ENTRY_SP) /* save the current sp */ + swi r11, r0, PER_CPU(R11_SAVE) /* temporarily save r11 */ + lwi r11, r0, PER_CPU(KM) /* load mode indicator */ + beqid r11, 1f + nop + brid 2f /* jump over */ + addik r1, r1, (-PT_SIZE) /* room for pt_regs (delay slot) */ +1: /* switch to kernel stack */ + lwi r1, r0, PER_CPU(CURRENT_SAVE) /* get the saved current */ + lwi r1, r1, TS_THREAD_INFO /* get the thread info */ + /* calculate kernel stack pointer */ + addik r1, r1, THREAD_SIZE - PT_SIZE +2: + swi r11, r1, PT_MODE /* store the mode */ + lwi r11, r0, PER_CPU(R11_SAVE) /* reload r11 */ + swi r2, r1, PT_R2 + swi r3, r1, PT_R3 + swi r4, r1, PT_R4 + swi r5, r1, PT_R5 + swi r6, r1, PT_R6 + swi r7, r1, PT_R7 + swi r8, r1, PT_R8 + swi r9, r1, PT_R9 + swi r10, r1, PT_R10 + swi r11, r1, PT_R11 + swi r12, r1, PT_R12 + swi r13, r1, PT_R13 + swi r14, r1, PT_R14 + swi r14, r1, PT_PC + swi r15, r1, PT_R15 + swi r16, r1, PT_R16 + swi r17, r1, PT_R17 + swi r18, r1, PT_R18 + swi r19, r1, PT_R19 + swi r20, r1, PT_R20 + swi r21, r1, PT_R21 + swi r22, r1, PT_R22 + swi r23, r1, PT_R23 + swi r24, r1, PT_R24 + swi r25, r1, PT_R25 + swi r26, r1, PT_R26 + swi r27, r1, PT_R27 + swi r28, r1, PT_R28 + swi r29, r1, PT_R29 + swi r30, r1, PT_R30 + swi r31, r1, PT_R31 + /* special purpose registers */ + mfs r11, rmsr + swi r11, r1, PT_MSR + mfs r11, rear + swi r11, r1, PT_EAR + mfs r11, resr + swi r11, r1, PT_ESR + mfs r11, rfsr + swi r11, r1, PT_FSR + /* reload original stack pointer and save it */ + lwi r11, r0, PER_CPU(ENTRY_SP) + swi r11, r1, PT_R1 + /* update mode indicator we are in kernel mode */ + addik r11, r0, 1 + swi r11, r0, PER_CPU(KM) + /* restore r31 */ + lwi r31, r0, PER_CPU(CURRENT_SAVE) + /* prepare the link register, the argument and jump */ + la r15, r0, ret_from_intr - 8 + addk r6, r0, r15 + braid do_IRQ + add r5, r0, r1 + +ret_from_intr: + lwi r11, r1, PT_MODE + bneid r11, 3f + + lwi r6, r31, TS_THREAD_INFO /* get thread info */ + lwi r19, r6, TI_FLAGS /* get flags in thread info */ + /* do an extra work if any bits are set */ + + andi r11, r19, _TIF_NEED_RESCHED + beqi r11, 1f + bralid r15, schedule + nop +1: andi r11, r19, _TIF_SIGPENDING + beqid r11, no_intr_reshed + addk r5, r1, r0 + addk r7, r0, r0 + bralid r15, do_signal + addk r6, r0, r0 + +no_intr_reshed: + /* save mode indicator */ + lwi r11, r1, PT_MODE +3: + swi r11, r0, PER_CPU(KM) + + /* save r31 */ + swi r31, r0, PER_CPU(CURRENT_SAVE) +restore_context: + /* special purpose registers */ + lwi r11, r1, PT_FSR + mts rfsr, r11 + lwi r11, r1, PT_ESR + mts resr, r11 + lwi r11, r1, PT_EAR + mts rear, r11 + lwi r11, r1, PT_MSR + mts rmsr, r11 + + lwi r31, r1, PT_R31 + lwi r30, r1, PT_R30 + lwi r29, r1, PT_R29 + lwi r28, r1, PT_R28 + lwi r27, r1, PT_R27 + lwi r26, r1, PT_R26 + lwi r25, r1, PT_R25 + lwi r24, r1, PT_R24 + lwi r23, r1, PT_R23 + lwi r22, r1, PT_R22 + lwi r21, r1, PT_R21 + lwi r20, r1, PT_R20 + lwi r19, r1, PT_R19 + lwi r18, r1, PT_R18 + lwi r17, r1, PT_R17 + lwi r16, r1, PT_R16 + lwi r15, r1, PT_R15 + lwi r14, r1, PT_PC + lwi r13, r1, PT_R13 + lwi r12, r1, PT_R12 + lwi r11, r1, PT_R11 + lwi r10, r1, PT_R10 + lwi r9, r1, PT_R9 + lwi r8, r1, PT_R8 + lwi r7, r1, PT_R7 + lwi r6, r1, PT_R6 + lwi r5, r1, PT_R5 + lwi r4, r1, PT_R4 + lwi r3, r1, PT_R3 + lwi r2, r1, PT_R2 + lwi r1, r1, PT_R1 + rtid r14, 0 + nop + +ENTRY(_reset) + brai 0; + +ENTRY(_user_exception) + swi r1, r0, PER_CPU(ENTRY_SP) /* save the current sp */ + swi r11, r0, PER_CPU(R11_SAVE) /* temporarily save r11 */ + lwi r11, r0, PER_CPU(KM) /* load mode indicator */ + beqid r11, 1f /* Already in kernel mode? */ + nop + brid 2f /* jump over */ + addik r1, r1, (-PT_SIZE) /* Room for pt_regs (delay slot) */ +1: /* Switch to kernel stack */ + lwi r1, r0, PER_CPU(CURRENT_SAVE) /* get the saved current */ + lwi r1, r1, TS_THREAD_INFO /* get the thread info */ + /* calculate kernel stack pointer */ + addik r1, r1, THREAD_SIZE - PT_SIZE + swi r11, r0, PER_CPU(R11_SAVE) /* temporarily save r11 */ + lwi r11, r0, PER_CPU(KM) /* load mode indicator */ +2: + swi r11, r1, PT_MODE /* store the mode */ + lwi r11, r0, PER_CPU(R11_SAVE) /* reload r11 */ + /* save them on stack */ + swi r2, r1, PT_R2 + swi r3, r1, PT_R3 /* r3: _always_ in clobber list; see unistd.h */ + swi r4, r1, PT_R4 /* r4: _always_ in clobber list; see unistd.h */ + swi r5, r1, PT_R5 + swi r6, r1, PT_R6 + swi r7, r1, PT_R7 + swi r8, r1, PT_R8 + swi r9, r1, PT_R9 + swi r10, r1, PT_R10 + swi r11, r1, PT_R11 + /* r12: _always_ in clobber list; see unistd.h */ + swi r12, r1, PT_R12 + swi r13, r1, PT_R13 + /* r14: _always_ in clobber list; see unistd.h */ + swi r14, r1, PT_R14 + /* but we want to return to the next inst. */ + addik r14, r14, 0x4 + swi r14, r1, PT_PC /* increment by 4 and store in pc */ + swi r15, r1, PT_R15 + swi r16, r1, PT_R16 + swi r17, r1, PT_R17 + swi r18, r1, PT_R18 + swi r19, r1, PT_R19 + swi r20, r1, PT_R20 + swi r21, r1, PT_R21 + swi r22, r1, PT_R22 + swi r23, r1, PT_R23 + swi r24, r1, PT_R24 + swi r25, r1, PT_R25 + swi r26, r1, PT_R26 + swi r27, r1, PT_R27 + swi r28, r1, PT_R28 + swi r29, r1, PT_R29 + swi r30, r1, PT_R30 + swi r31, r1, PT_R31 + + disable_irq + nop /* make sure IE bit is in effect */ + clear_bip /* once IE is in effect it is safe to clear BIP */ + nop + + /* special purpose registers */ + mfs r11, rmsr + swi r11, r1, PT_MSR + mfs r11, rear + swi r11, r1, PT_EAR + mfs r11, resr + swi r11, r1, PT_ESR + mfs r11, rfsr + swi r11, r1, PT_FSR + /* reload original stack pointer and save it */ + lwi r11, r0, PER_CPU(ENTRY_SP) + swi r11, r1, PT_R1 + /* update mode indicator we are in kernel mode */ + addik r11, r0, 1 + swi r11, r0, PER_CPU(KM) + /* restore r31 */ + lwi r31, r0, PER_CPU(CURRENT_SAVE) + /* re-enable interrupts now we are in kernel mode */ + enable_irq + + /* See if the system call number is valid. */ + addi r11, r12, -__NR_syscalls + bgei r11, 1f /* return to user if not valid */ + /* Figure out which function to use for this system call. */ + /* Note Microblaze barrel shift is optional, so don't rely on it */ + add r12, r12, r12 /* convert num -> ptr */ + add r12, r12, r12 + lwi r12, r12, sys_call_table /* Get function pointer */ + la r15, r0, ret_to_user-8 /* set return address */ + bra r12 /* Make the system call. */ + bri 0 /* won't reach here */ +1: + brid ret_to_user /* jump to syscall epilogue */ + addi r3, r0, -ENOSYS /* set errno in delay slot */ + +/* + * Debug traps are like a system call, but entered via brki r14, 0x60 + * All we need to do is send the SIGTRAP signal to current, ptrace and do_signal + * will handle the rest + */ +ENTRY(_debug_exception) + swi r1, r0, PER_CPU(ENTRY_SP) /* save the current sp */ + lwi r1, r0, PER_CPU(CURRENT_SAVE) /* get the saved current */ + lwi r1, r1, TS_THREAD_INFO /* get the thread info */ + addik r1, r1, THREAD_SIZE - PT_SIZE /* get the kernel stack */ + swi r11, r0, PER_CPU(R11_SAVE) /* temporarily save r11 */ + lwi r11, r0, PER_CPU(KM) /* load mode indicator */ +//save_context: + swi r11, r1, PT_MODE /* store the mode */ + lwi r11, r0, PER_CPU(R11_SAVE) /* reload r11 */ + /* save them on stack */ + swi r2, r1, PT_R2 + swi r3, r1, PT_R3 /* r3: _always_ in clobber list; see unistd.h */ + swi r4, r1, PT_R4 /* r4: _always_ in clobber list; see unistd.h */ + swi r5, r1, PT_R5 + swi r6, r1, PT_R6 + swi r7, r1, PT_R7 + swi r8, r1, PT_R8 + swi r9, r1, PT_R9 + swi r10, r1, PT_R10 + swi r11, r1, PT_R11 + /* r12: _always_ in clobber list; see unistd.h */ + swi r12, r1, PT_R12 + swi r13, r1, PT_R13 + /* r14: _always_ in clobber list; see unistd.h */ + swi r14, r1, PT_R14 + swi r14, r1, PT_PC /* Will return to interrupted instruction */ + swi r15, r1, PT_R15 + swi r16, r1, PT_R16 + swi r17, r1, PT_R17 + swi r18, r1, PT_R18 + swi r19, r1, PT_R19 + swi r20, r1, PT_R20 + swi r21, r1, PT_R21 + swi r22, r1, PT_R22 + swi r23, r1, PT_R23 + swi r24, r1, PT_R24 + swi r25, r1, PT_R25 + swi r26, r1, PT_R26 + swi r27, r1, PT_R27 + swi r28, r1, PT_R28 + swi r29, r1, PT_R29 + swi r30, r1, PT_R30 + swi r31, r1, PT_R31 + + disable_irq + nop /* make sure IE bit is in effect */ + clear_bip /* once IE is in effect it is safe to clear BIP */ + nop + + /* special purpose registers */ + mfs r11, rmsr + swi r11, r1, PT_MSR + mfs r11, rear + swi r11, r1, PT_EAR + mfs r11, resr + swi r11, r1, PT_ESR + mfs r11, rfsr + swi r11, r1, PT_FSR + /* reload original stack pointer and save it */ + lwi r11, r0, PER_CPU(ENTRY_SP) + swi r11, r1, PT_R1 + /* update mode indicator we are in kernel mode */ + addik r11, r0, 1 + swi r11, r0, PER_CPU(KM) + /* restore r31 */ + lwi r31, r0, PER_CPU(CURRENT_SAVE) + /* re-enable interrupts now we are in kernel mode */ + enable_irq + + addi r5, r0, SIGTRAP /* sending the trap signal */ + add r6, r0, r31 /* to current */ + bralid r15, send_sig + add r7, r0, r0 /* 3rd param zero */ + + /* Restore r3/r4 to work around how ret_to_user works */ + lwi r3, r1, PT_R3 + lwi r4, r1, PT_R4 + bri ret_to_user + +ENTRY(_break) + bri 0 + +/* struct task_struct *_switch_to(struct thread_info *prev, + struct thread_info *next); */ +ENTRY(_switch_to) + /* prepare return value */ + addk r3, r0, r31 + + /* save registers in cpu_context */ + /* use r11 and r12, volatile registers, as temp register */ + addik r11, r5, TI_CPU_CONTEXT + swi r1, r11, CC_R1 + swi r2, r11, CC_R2 + /* skip volatile registers. + * they are saved on stack when we jumped to _switch_to() */ + /* dedicated registers */ + swi r13, r11, CC_R13 + swi r14, r11, CC_R14 + swi r15, r11, CC_R15 + swi r16, r11, CC_R16 + swi r17, r11, CC_R17 + swi r18, r11, CC_R18 + /* save non-volatile registers */ + swi r19, r11, CC_R19 + swi r20, r11, CC_R20 + swi r21, r11, CC_R21 + swi r22, r11, CC_R22 + swi r23, r11, CC_R23 + swi r24, r11, CC_R24 + swi r25, r11, CC_R25 + swi r26, r11, CC_R26 + swi r27, r11, CC_R27 + swi r28, r11, CC_R28 + swi r29, r11, CC_R29 + swi r30, r11, CC_R30 + /* special purpose registers */ + mfs r12, rmsr + swi r12, r11, CC_MSR + mfs r12, rear + swi r12, r11, CC_EAR + mfs r12, resr + swi r12, r11, CC_ESR + mfs r12, rfsr + swi r12, r11, CC_FSR + + /* update r31, the current */ + lwi r31, r6, TI_TASK + swi r31, r0, PER_CPU(CURRENT_SAVE) + + /* get new process' cpu context and restore */ + addik r11, r6, TI_CPU_CONTEXT + + /* special purpose registers */ + lwi r12, r11, CC_FSR + mts rfsr, r12 + lwi r12, r11, CC_ESR + mts resr, r12 + lwi r12, r11, CC_EAR + mts rear, r12 + lwi r12, r11, CC_MSR + mts rmsr, r12 + /* non-volatile registers */ + lwi r30, r11, CC_R30 + lwi r29, r11, CC_R29 + lwi r28, r11, CC_R28 + lwi r27, r11, CC_R27 + lwi r26, r11, CC_R26 + lwi r25, r11, CC_R25 + lwi r24, r11, CC_R24 + lwi r23, r11, CC_R23 + lwi r22, r11, CC_R22 + lwi r21, r11, CC_R21 + lwi r20, r11, CC_R20 + lwi r19, r11, CC_R19 + /* dedicated registers */ + lwi r18, r11, CC_R18 + lwi r17, r11, CC_R17 + lwi r16, r11, CC_R16 + lwi r15, r11, CC_R15 + lwi r14, r11, CC_R14 + lwi r13, r11, CC_R13 + /* skip volatile registers */ + lwi r2, r11, CC_R2 + lwi r1, r11, CC_R1 + + rtsd r15, 8 + nop + +ENTRY(ret_from_fork) + addk r5, r0, r3 + addk r6, r0, r1 + brlid r15, schedule_tail + nop + swi r31, r1, PT_R31 /* save r31 in user context. */ + /* will soon be restored to r31 in ret_to_user */ + addk r3, r0, r0 + brid ret_to_user + nop + +work_pending: + andi r11, r19, _TIF_NEED_RESCHED + beqi r11, 1f + bralid r15, schedule + nop +1: andi r11, r19, _TIF_SIGPENDING + beqi r11, no_work_pending + addk r5, r1, r0 + addik r7, r0, 1 + bralid r15, do_signal + addk r6, r0, r0 + bri no_work_pending + +ENTRY(ret_to_user) + disable_irq + + swi r4, r1, PT_R4 /* return val */ + swi r3, r1, PT_R3 /* return val */ + + lwi r6, r31, TS_THREAD_INFO /* get thread info */ + lwi r19, r6, TI_FLAGS /* get flags in thread info */ + bnei r19, work_pending /* do an extra work if any bits are set */ +no_work_pending: + disable_irq + + /* save r31 */ + swi r31, r0, PER_CPU(CURRENT_SAVE) + /* save mode indicator */ + lwi r18, r1, PT_MODE + swi r18, r0, PER_CPU(KM) +//restore_context: + /* special purpose registers */ + lwi r18, r1, PT_FSR + mts rfsr, r18 + lwi r18, r1, PT_ESR + mts resr, r18 + lwi r18, r1, PT_EAR + mts rear, r18 + lwi r18, r1, PT_MSR + mts rmsr, r18 + + lwi r31, r1, PT_R31 + lwi r30, r1, PT_R30 + lwi r29, r1, PT_R29 + lwi r28, r1, PT_R28 + lwi r27, r1, PT_R27 + lwi r26, r1, PT_R26 + lwi r25, r1, PT_R25 + lwi r24, r1, PT_R24 + lwi r23, r1, PT_R23 + lwi r22, r1, PT_R22 + lwi r21, r1, PT_R21 + lwi r20, r1, PT_R20 + lwi r19, r1, PT_R19 + lwi r18, r1, PT_R18 + lwi r17, r1, PT_R17 + lwi r16, r1, PT_R16 + lwi r15, r1, PT_R15 + lwi r14, r1, PT_PC + lwi r13, r1, PT_R13 + lwi r12, r1, PT_R12 + lwi r11, r1, PT_R11 + lwi r10, r1, PT_R10 + lwi r9, r1, PT_R9 + lwi r8, r1, PT_R8 + lwi r7, r1, PT_R7 + lwi r6, r1, PT_R6 + lwi r5, r1, PT_R5 + lwi r4, r1, PT_R4 /* return val */ + lwi r3, r1, PT_R3 /* return val */ + lwi r2, r1, PT_R2 + lwi r1, r1, PT_R1 + + rtid r14, 0 + nop + +sys_vfork_wrapper: + brid sys_vfork + addk r5, r1, r0 + +sys_clone_wrapper: + brid sys_clone + addk r7, r1, r0 + +sys_execve_wrapper: + brid sys_execve + addk r8, r1, r0 + +sys_sigreturn_wrapper: + brid sys_sigreturn + addk r5, r1, r0 + +sys_rt_sigreturn_wrapper: + brid sys_rt_sigreturn + addk r5, r1, r0 + +sys_sigsuspend_wrapper: + brid sys_rt_sigsuspend + addk r6, r1, r0 + +sys_rt_sigsuspend_wrapper: + brid sys_rt_sigsuspend + addk r7, r1, r0 + + /* Interrupt vector table */ + .section .init.ivt, "ax" + .org 0x0 + brai _reset + brai _user_exception + brai _interrupt + brai _break + brai _hw_exception_handler + .org 0x60 + brai _debug_exception + +.section .rodata,"a" +#include "syscall_table.S" + +syscall_table_size=(.-sys_call_table) diff --git a/arch/microblaze/kernel/exceptions.c b/arch/microblaze/kernel/exceptions.c new file mode 100644 index 000000000000..4a8a4064c7ee --- /dev/null +++ b/arch/microblaze/kernel/exceptions.c @@ -0,0 +1,124 @@ +/* + * HW exception handling + * + * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2008 PetaLogix + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file COPYING in the main directory of this + * archive for more details. + */ + +/* + * This file handles the architecture-dependent parts of hardware exceptions + */ + +#include <linux/kernel.h> +#include <linux/signal.h> +#include <linux/sched.h> +#include <linux/kallsyms.h> +#include <linux/module.h> + +#include <asm/exceptions.h> +#include <asm/entry.h> /* For KM CPU var */ +#include <asm/uaccess.h> +#include <asm/errno.h> +#include <asm/ptrace.h> +#include <asm/current.h> + +#define MICROBLAZE_ILL_OPCODE_EXCEPTION 0x02 +#define MICROBLAZE_IBUS_EXCEPTION 0x03 +#define MICROBLAZE_DBUS_EXCEPTION 0x04 +#define MICROBLAZE_DIV_ZERO_EXCEPTION 0x05 +#define MICROBLAZE_FPU_EXCEPTION 0x06 +#define MICROBLAZE_PRIVILEG_EXCEPTION 0x07 + +static DEFINE_SPINLOCK(die_lock); + +void die(const char *str, struct pt_regs *fp, long err) +{ + console_verbose(); + spin_lock_irq(&die_lock); + printk(KERN_WARNING "Oops: %s, sig: %ld\n", str, err); + show_regs(fp); + spin_unlock_irq(&die_lock); + /* do_exit() should take care of panic'ing from an interrupt + * context so we don't handle it here + */ + do_exit(err); +} + +void _exception(int signr, struct pt_regs *regs, int code, unsigned long addr) +{ + siginfo_t info; + + if (kernel_mode(regs)) { + debugger(regs); + die("Exception in kernel mode", regs, signr); + } + info.si_signo = signr; + info.si_errno = 0; + info.si_code = code; + info.si_addr = (void __user *) addr; + force_sig_info(signr, &info, current); +} + +asmlinkage void full_exception(struct pt_regs *regs, unsigned int type, + int fsr, int addr) +{ +#if 0 + printk(KERN_WARNING "Exception %02x in %s mode, FSR=%08x PC=%08x ESR=%08x\n", + type, user_mode(regs) ? "user" : "kernel", fsr, + (unsigned int) regs->pc, (unsigned int) regs->esr); +#endif + + switch (type & 0x1F) { + case MICROBLAZE_ILL_OPCODE_EXCEPTION: + _exception(SIGILL, regs, ILL_ILLOPC, addr); + break; + case MICROBLAZE_IBUS_EXCEPTION: + if (user_mode(regs)) { + printk(KERN_WARNING "Instruction bus error exception in user mode.\n"); + _exception(SIGBUS, regs, BUS_ADRERR, addr); + return; + } + printk(KERN_WARNING "Instruction bus error exception in kernel mode.\n"); + die("bus exception", regs, SIGBUS); + break; + case MICROBLAZE_DBUS_EXCEPTION: + if (user_mode(regs)) { + printk(KERN_WARNING "Data bus error exception in user mode.\n"); + _exception(SIGBUS, regs, BUS_ADRERR, addr); + return; + } + printk(KERN_WARNING "Data bus error exception in kernel mode.\n"); + die("bus exception", regs, SIGBUS); + break; + case MICROBLAZE_DIV_ZERO_EXCEPTION: + printk(KERN_WARNING "Divide by zero exception\n"); + _exception(SIGILL, regs, ILL_ILLOPC, addr); + break; + + case MICROBLAZE_FPU_EXCEPTION: + /* IEEE FP exception */ + /* I removed fsr variable and use code var for storing fsr */ + if (fsr & FSR_IO) + fsr = FPE_FLTINV; + else if (fsr & FSR_OF) + fsr = FPE_FLTOVF; + else if (fsr & FSR_UF) + fsr = FPE_FLTUND; + else if (fsr & FSR_DZ) + fsr = FPE_FLTDIV; + else if (fsr & FSR_DO) + fsr = FPE_FLTRES; + _exception(SIGFPE, regs, fsr, addr); + break; + + default: + printk(KERN_WARNING "Unexpected exception %02x " + "PC=%08x in %s mode\n", type, (unsigned int) addr, + kernel_mode(regs) ? "kernel" : "user"); + } + return; +} diff --git a/arch/microblaze/kernel/head.S b/arch/microblaze/kernel/head.S new file mode 100644 index 000000000000..319dc35fc922 --- /dev/null +++ b/arch/microblaze/kernel/head.S @@ -0,0 +1,56 @@ +/* + * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2007-2009 PetaLogix + * Copyright (C) 2006 Atmark Techno, Inc. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include <linux/linkage.h> +#include <asm/thread_info.h> +#include <asm/page.h> + + .text +ENTRY(_start) + mfs r1, rmsr + andi r1, r1, ~2 + mts rmsr, r1 + +/* save fdt to kernel location */ +/* r7 stores pointer to fdt blob */ + beqi r7, no_fdt_arg + or r11, r0, r0 /* incremment */ + ori r4, r0, TOPHYS(_fdt_start) /* save bram context */ + ori r3, r0, (0x4000 - 4) +_copy_fdt: + lw r12, r7, r11 /* r12 = r7 + r11 */ + sw r12, r4, r11 /* addr[r4 + r11] = r12 */ + addik r11, r11, 4 /* increment counting */ + bgtid r3, _copy_fdt /* loop for all entries */ + addik r3, r3, -4 /* descrement loop */ +no_fdt_arg: + + /* Initialize small data anchors */ + la r13, r0, _KERNEL_SDA_BASE_ + la r2, r0, _KERNEL_SDA2_BASE_ + + /* Initialize stack pointer */ + la r1, r0, init_thread_union + THREAD_SIZE - 4 + + /* Initialize r31 with current task address */ + la r31, r0, init_task + + /* + * Call platform dependent initialize function. + * Please see $(ARCH)/mach-$(SUBARCH)/setup.c for + * the function. + */ + la r8, r0, machine_early_init + brald r15, r8 + nop + + la r15, r0, machine_halt + braid start_kernel + nop diff --git a/arch/microblaze/kernel/heartbeat.c b/arch/microblaze/kernel/heartbeat.c new file mode 100644 index 000000000000..1bdf20222b92 --- /dev/null +++ b/arch/microblaze/kernel/heartbeat.c @@ -0,0 +1,67 @@ +/* + * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2007-2009 PetaLogix + * Copyright (C) 2006 Atmark Techno, Inc. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include <linux/sched.h> +#include <linux/io.h> + +#include <asm/setup.h> +#include <asm/page.h> +#include <asm/prom.h> + +static unsigned int base_addr; + +void heartbeat(void) +{ + static unsigned int cnt, period, dist; + + if (base_addr) { + if (cnt == 0 || cnt == dist) + out_be32(base_addr, 1); + else if (cnt == 7 || cnt == dist + 7) + out_be32(base_addr, 0); + + if (++cnt > period) { + cnt = 0; + /* + * The hyperbolic function below modifies the heartbeat + * period length in dependency of the current (5min) + * load. It goes through the points f(0)=126, f(1)=86, + * f(5)=51, f(inf)->30. + */ + period = ((672 << FSHIFT) / (5 * avenrun[0] + + (7 << FSHIFT))) + 30; + dist = period / 4; + } + } +} + +void setup_heartbeat(void) +{ + struct device_node *gpio = NULL; + int j; + char *gpio_list[] = { + "xlnx,xps-gpio-1.00.a", + "xlnx,opb-gpio-1.00.a", + NULL + }; + + for (j = 0; gpio_list[j] != NULL; j++) { + gpio = of_find_compatible_node(NULL, NULL, gpio_list[j]); + if (gpio) + break; + } + + base_addr = *(int *) of_get_property(gpio, "reg", NULL); + base_addr = (unsigned long) ioremap(base_addr, PAGE_SIZE); + printk(KERN_NOTICE "Heartbeat GPIO at 0x%x\n", base_addr); + + if (*(int *) of_get_property(gpio, "xlnx,is-bidir", NULL)) + out_be32(base_addr + 4, 0); /* GPIO is configured as output */ +} diff --git a/arch/microblaze/kernel/hw_exception_handler.S b/arch/microblaze/kernel/hw_exception_handler.S new file mode 100644 index 000000000000..cf9486d99838 --- /dev/null +++ b/arch/microblaze/kernel/hw_exception_handler.S @@ -0,0 +1,458 @@ +/* + * Exception handling for Microblaze + * + * Rewriten interrupt handling + * + * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2008-2009 PetaLogix + * + * uClinux customisation (C) 2005 John Williams + * + * MMU code derived from arch/ppc/kernel/head_4xx.S: + * Copyright (C) 1995-1996 Gary Thomas <gdt@linuxppc.org> + * Initial PowerPC version. + * Copyright (C) 1996 Cort Dougan <cort@cs.nmt.edu> + * Rewritten for PReP + * Copyright (C) 1996 Paul Mackerras <paulus@cs.anu.edu.au> + * Low-level exception handers, MMU support, and rewrite. + * Copyright (C) 1997 Dan Malek <dmalek@jlc.net> + * PowerPC 8xx modifications. + * Copyright (C) 1998-1999 TiVo, Inc. + * PowerPC 403GCX modifications. + * Copyright (C) 1999 Grant Erickson <grant@lcse.umn.edu> + * PowerPC 403GCX/405GP modifications. + * Copyright 2000 MontaVista Software Inc. + * PPC405 modifications + * PowerPC 403GCX/405GP modifications. + * Author: MontaVista Software, Inc. + * frank_rowand@mvista.com or source@mvista.com + * debbie_chu@mvista.com + * + * Original code + * Copyright (C) 2004 Xilinx, Inc. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + */ + +/* + * Here are the handlers which don't require enabling translation + * and calling other kernel code thus we can keep their design very simple + * and do all processing in real mode. All what they need is a valid current + * (that is an issue for the CONFIG_REGISTER_TASK_PTR case) + * This handlers use r3,r4,r5,r6 and optionally r[current] to work therefore + * these registers are saved/restored + * The handlers which require translation are in entry.S --KAA + * + * Microblaze HW Exception Handler + * - Non self-modifying exception handler for the following exception conditions + * - Unalignment + * - Instruction bus error + * - Data bus error + * - Illegal instruction opcode + * - Divide-by-zero + * + * Note we disable interrupts during exception handling, otherwise we will + * possibly get multiple re-entrancy if interrupt handles themselves cause + * exceptions. JW + */ + +#include <asm/exceptions.h> +#include <asm/unistd.h> +#include <asm/page.h> + +#include <asm/entry.h> +#include <asm/current.h> +#include <linux/linkage.h> + +#include <asm/mmu.h> +#include <asm/pgtable.h> +#include <asm/asm-offsets.h> + +/* Helpful Macros */ +#define EX_HANDLER_STACK_SIZ (4*19) +#define NUM_TO_REG(num) r ## num + +#define LWREG_NOP \ + bri ex_handler_unhandled; \ + nop; + +#define SWREG_NOP \ + bri ex_handler_unhandled; \ + nop; + +/* FIXME this is weird - for noMMU kernel is not possible to use brid + * instruction which can shorten executed time + */ + +/* r3 is the source */ +#define R3_TO_LWREG_V(regnum) \ + swi r3, r1, 4 * regnum; \ + bri ex_handler_done; + +/* r3 is the source */ +#define R3_TO_LWREG(regnum) \ + or NUM_TO_REG (regnum), r0, r3; \ + bri ex_handler_done; + +/* r3 is the target */ +#define SWREG_TO_R3_V(regnum) \ + lwi r3, r1, 4 * regnum; \ + bri ex_sw_tail; + +/* r3 is the target */ +#define SWREG_TO_R3(regnum) \ + or r3, r0, NUM_TO_REG (regnum); \ + bri ex_sw_tail; + +.extern other_exception_handler /* Defined in exception.c */ + +/* + * hw_exception_handler - Handler for exceptions + * + * Exception handler notes: + * - Handles all exceptions + * - Does not handle unaligned exceptions during load into r17, r1, r0. + * - Does not handle unaligned exceptions during store from r17 (cannot be + * done) and r1 (slows down common case) + * + * Relevant register structures + * + * EAR - |----|----|----|----|----|----|----|----| + * - < ## 32 bit faulting address ## > + * + * ESR - |----|----|----|----|----| - | - |-----|-----| + * - W S REG EXC + * + * + * STACK FRAME STRUCTURE (for NO_MMU) + * --------------------------------- + * + * +-------------+ + 0 + * | MSR | + * +-------------+ + 4 + * | r1 | + * | . | + * | . | + * | . | + * | . | + * | r18 | + * +-------------+ + 76 + * | . | + * | . | + * + * NO_MMU kernel use the same r0_ram pointed space - look to vmlinux.lds.S + * which is used for storing register values - old style was, that value were + * stored in stack but in case of failure you lost information about register. + * Currently you can see register value in memory in specific place. + * In compare to with previous solution the speed should be the same. + * + * MMU exception handler has different handling compare to no MMU kernel. + * Exception handler use jump table for directing of what happen. For MMU kernel + * is this approach better because MMU relate exception are handled by asm code + * in this file. In compare to with MMU expect of unaligned exception + * is everything handled by C code. + */ + +/* + * every of these handlers is entered having R3/4/5/6/11/current saved on stack + * and clobbered so care should be taken to restore them if someone is going to + * return from exception + */ + +/* wrappers to restore state before coming to entry.S */ + +.global _hw_exception_handler +.section .text +.align 4 +.ent _hw_exception_handler +_hw_exception_handler: + addik r1, r1, -(EX_HANDLER_STACK_SIZ); /* Create stack frame */ + swi r3, r1, PT_R3 + swi r4, r1, PT_R4 + swi r5, r1, PT_R5 + swi r6, r1, PT_R6 + + mfs r5, rmsr; + nop + swi r5, r1, 0; + mfs r4, rbtr /* Save BTR before jumping to handler */ + nop + mfs r3, resr + nop + + andi r5, r3, 0x1000; /* Check ESR[DS] */ + beqi r5, not_in_delay_slot; /* Branch if ESR[DS] not set */ + mfs r17, rbtr; /* ESR[DS] set - return address in BTR */ + nop +not_in_delay_slot: + swi r17, r1, PT_R17 + + andi r5, r3, 0x1F; /* Extract ESR[EXC] */ + + /* Exceptions enabled here. This will allow nested exceptions */ + mfs r6, rmsr; + nop + swi r6, r1, 0; /* RMSR_OFFSET */ + ori r6, r6, 0x100; /* Turn ON the EE bit */ + andi r6, r6, ~2; /* Disable interrupts */ + mts rmsr, r6; + nop + + xori r6, r5, 1; /* 00001 = Unaligned Exception */ + /* Jump to unalignment exception handler */ + beqi r6, handle_unaligned_ex; + +handle_other_ex: /* Handle Other exceptions here */ + /* Save other volatiles before we make procedure calls below */ + swi r7, r1, PT_R7 + swi r8, r1, PT_R8 + swi r9, r1, PT_R9 + swi r10, r1, PT_R10 + swi r11, r1, PT_R11 + swi r12, r1, PT_R12 + swi r14, r1, PT_R14 + swi r15, r1, PT_R15 + swi r18, r1, PT_R18 + + or r5, r1, r0 + andi r6, r3, 0x1F; /* Load ESR[EC] */ + lwi r7, r0, PER_CPU(KM) /* MS: saving current kernel mode to regs */ + swi r7, r1, PT_MODE + mfs r7, rfsr + nop + addk r8, r17, r0; /* Load exception address */ + bralid r15, full_exception; /* Branch to the handler */ + nop; + + /* + * Trigger execution of the signal handler by enabling + * interrupts and calling an invalid syscall. + */ + mfs r5, rmsr; + nop + ori r5, r5, 2; + mts rmsr, r5; /* enable interrupt */ + nop + addi r12, r0, __NR_syscalls; + brki r14, 0x08; + mfs r5, rmsr; /* disable interrupt */ + nop + andi r5, r5, ~2; + mts rmsr, r5; + nop + + lwi r7, r1, PT_R7 + lwi r8, r1, PT_R8 + lwi r9, r1, PT_R9 + lwi r10, r1, PT_R10 + lwi r11, r1, PT_R11 + lwi r12, r1, PT_R12 + lwi r14, r1, PT_R14 + lwi r15, r1, PT_R15 + lwi r18, r1, PT_R18 + + bri ex_handler_done; /* Complete exception handling */ + +/* 0x01 - Unaligned data access exception + * This occurs when a word access is not aligned on a word boundary, + * or when a 16-bit access is not aligned on a 16-bit boundary. + * This handler perform the access, and returns, except for MMU when + * the unaligned address is last on a 4k page or the physical address is + * not found in the page table, in which case unaligned_data_trap is called. + */ +handle_unaligned_ex: + /* Working registers already saved: R3, R4, R5, R6 + * R3 = ESR + * R4 = BTR + */ + mfs r4, rear; + nop + + andi r6, r3, 0x3E0; /* Mask and extract the register operand */ + srl r6, r6; /* r6 >> 5 */ + srl r6, r6; + srl r6, r6; + srl r6, r6; + srl r6, r6; + /* Store the register operand in a temporary location */ + sbi r6, r0, TOPHYS(ex_reg_op); + + andi r6, r3, 0x400; /* Extract ESR[S] */ + bnei r6, ex_sw; +ex_lw: + andi r6, r3, 0x800; /* Extract ESR[W] */ + beqi r6, ex_lhw; + lbui r5, r4, 0; /* Exception address in r4 */ + /* Load a word, byte-by-byte from destination address + and save it in tmp space */ + sbi r5, r0, TOPHYS(ex_tmp_data_loc_0); + lbui r5, r4, 1; + sbi r5, r0, TOPHYS(ex_tmp_data_loc_1); + lbui r5, r4, 2; + sbi r5, r0, TOPHYS(ex_tmp_data_loc_2); + lbui r5, r4, 3; + sbi r5, r0, TOPHYS(ex_tmp_data_loc_3); + /* Get the destination register value into r3 */ + lwi r3, r0, TOPHYS(ex_tmp_data_loc_0); + bri ex_lw_tail; +ex_lhw: + lbui r5, r4, 0; /* Exception address in r4 */ + /* Load a half-word, byte-by-byte from destination + address and save it in tmp space */ + sbi r5, r0, TOPHYS(ex_tmp_data_loc_0); + lbui r5, r4, 1; + sbi r5, r0, TOPHYS(ex_tmp_data_loc_1); + /* Get the destination register value into r3 */ + lhui r3, r0, TOPHYS(ex_tmp_data_loc_0); +ex_lw_tail: + /* Get the destination register number into r5 */ + lbui r5, r0, TOPHYS(ex_reg_op); + /* Form load_word jump table offset (lw_table + (8 * regnum)) */ + la r6, r0, TOPHYS(lw_table); + addk r5, r5, r5; + addk r5, r5, r5; + addk r5, r5, r5; + addk r5, r5, r6; + bra r5; +ex_lw_end: /* Exception handling of load word, ends */ +ex_sw: + /* Get the destination register number into r5 */ + lbui r5, r0, TOPHYS(ex_reg_op); + /* Form store_word jump table offset (sw_table + (8 * regnum)) */ + la r6, r0, TOPHYS(sw_table); + add r5, r5, r5; + add r5, r5, r5; + add r5, r5, r5; + add r5, r5, r6; + bra r5; +ex_sw_tail: + mfs r6, resr; + nop + andi r6, r6, 0x800; /* Extract ESR[W] */ + beqi r6, ex_shw; + /* Get the word - delay slot */ + swi r3, r0, TOPHYS(ex_tmp_data_loc_0); + /* Store the word, byte-by-byte into destination address */ + lbui r3, r0, TOPHYS(ex_tmp_data_loc_0); + sbi r3, r4, 0; + lbui r3, r0, TOPHYS(ex_tmp_data_loc_1); + sbi r3, r4, 1; + lbui r3, r0, TOPHYS(ex_tmp_data_loc_2); + sbi r3, r4, 2; + lbui r3, r0, TOPHYS(ex_tmp_data_loc_3); + sbi r3, r4, 3; + bri ex_handler_done; + +ex_shw: + /* Store the lower half-word, byte-by-byte into destination address */ + swi r3, r0, TOPHYS(ex_tmp_data_loc_0); + lbui r3, r0, TOPHYS(ex_tmp_data_loc_2); + sbi r3, r4, 0; + lbui r3, r0, TOPHYS(ex_tmp_data_loc_3); + sbi r3, r4, 1; +ex_sw_end: /* Exception handling of store word, ends. */ + +ex_handler_done: + lwi r5, r1, 0 /* RMSR */ + mts rmsr, r5 + nop + lwi r3, r1, PT_R3 + lwi r4, r1, PT_R4 + lwi r5, r1, PT_R5 + lwi r6, r1, PT_R6 + lwi r17, r1, PT_R17 + + rted r17, 0 + addik r1, r1, (EX_HANDLER_STACK_SIZ); /* Restore stack frame */ + +.end _hw_exception_handler + +ex_handler_unhandled: +/* FIXME add handle function for unhandled exception - dump register */ + bri 0 + +.section .text +.align 4 +lw_table: +lw_r0: R3_TO_LWREG (0); +lw_r1: LWREG_NOP; +lw_r2: R3_TO_LWREG (2); +lw_r3: R3_TO_LWREG_V (3); +lw_r4: R3_TO_LWREG_V (4); +lw_r5: R3_TO_LWREG_V (5); +lw_r6: R3_TO_LWREG_V (6); +lw_r7: R3_TO_LWREG (7); +lw_r8: R3_TO_LWREG (8); +lw_r9: R3_TO_LWREG (9); +lw_r10: R3_TO_LWREG (10); +lw_r11: R3_TO_LWREG (11); +lw_r12: R3_TO_LWREG (12); +lw_r13: R3_TO_LWREG (13); +lw_r14: R3_TO_LWREG (14); +lw_r15: R3_TO_LWREG (15); +lw_r16: R3_TO_LWREG (16); +lw_r17: LWREG_NOP; +lw_r18: R3_TO_LWREG (18); +lw_r19: R3_TO_LWREG (19); +lw_r20: R3_TO_LWREG (20); +lw_r21: R3_TO_LWREG (21); +lw_r22: R3_TO_LWREG (22); +lw_r23: R3_TO_LWREG (23); +lw_r24: R3_TO_LWREG (24); +lw_r25: R3_TO_LWREG (25); +lw_r26: R3_TO_LWREG (26); +lw_r27: R3_TO_LWREG (27); +lw_r28: R3_TO_LWREG (28); +lw_r29: R3_TO_LWREG (29); +lw_r30: R3_TO_LWREG (30); +lw_r31: R3_TO_LWREG (31); + +sw_table: +sw_r0: SWREG_TO_R3 (0); +sw_r1: SWREG_NOP; +sw_r2: SWREG_TO_R3 (2); +sw_r3: SWREG_TO_R3_V (3); +sw_r4: SWREG_TO_R3_V (4); +sw_r5: SWREG_TO_R3_V (5); +sw_r6: SWREG_TO_R3_V (6); +sw_r7: SWREG_TO_R3 (7); +sw_r8: SWREG_TO_R3 (8); +sw_r9: SWREG_TO_R3 (9); +sw_r10: SWREG_TO_R3 (10); +sw_r11: SWREG_TO_R3 (11); +sw_r12: SWREG_TO_R3 (12); +sw_r13: SWREG_TO_R3 (13); +sw_r14: SWREG_TO_R3 (14); +sw_r15: SWREG_TO_R3 (15); +sw_r16: SWREG_TO_R3 (16); +sw_r17: SWREG_NOP; +sw_r18: SWREG_TO_R3 (18); +sw_r19: SWREG_TO_R3 (19); +sw_r20: SWREG_TO_R3 (20); +sw_r21: SWREG_TO_R3 (21); +sw_r22: SWREG_TO_R3 (22); +sw_r23: SWREG_TO_R3 (23); +sw_r24: SWREG_TO_R3 (24); +sw_r25: SWREG_TO_R3 (25); +sw_r26: SWREG_TO_R3 (26); +sw_r27: SWREG_TO_R3 (27); +sw_r28: SWREG_TO_R3 (28); +sw_r29: SWREG_TO_R3 (29); +sw_r30: SWREG_TO_R3 (30); +sw_r31: SWREG_TO_R3 (31); + +/* Temporary data structures used in the handler */ +.section .data +.align 4 +ex_tmp_data_loc_0: + .byte 0 +ex_tmp_data_loc_1: + .byte 0 +ex_tmp_data_loc_2: + .byte 0 +ex_tmp_data_loc_3: + .byte 0 +ex_reg_op: + .byte 0 diff --git a/arch/microblaze/kernel/init_task.c b/arch/microblaze/kernel/init_task.c new file mode 100644 index 000000000000..48eb9fb255fa --- /dev/null +++ b/arch/microblaze/kernel/init_task.c @@ -0,0 +1,29 @@ +/* + * Copyright (C) 2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2009 PetaLogix + * Copyright (C) 2006 Atmark Techno, Inc. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include <linux/module.h> +#include <linux/sched.h> +#include <linux/init_task.h> +#include <linux/fs.h> +#include <linux/mqueue.h> + +#include <asm/pgtable.h> + +static struct signal_struct init_signals = INIT_SIGNALS(init_signals); +static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand); +struct mm_struct init_mm = INIT_MM(init_mm); +EXPORT_SYMBOL(init_mm); + +union thread_union init_thread_union + __attribute__((__section__(".data.init_task"))) = +{ INIT_THREAD_INFO(init_task) }; + +struct task_struct init_task = INIT_TASK(init_task); +EXPORT_SYMBOL(init_task); diff --git a/arch/microblaze/kernel/intc.c b/arch/microblaze/kernel/intc.c new file mode 100644 index 000000000000..a69d3e3c2fd4 --- /dev/null +++ b/arch/microblaze/kernel/intc.c @@ -0,0 +1,172 @@ +/* + * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2007-2009 PetaLogix + * Copyright (C) 2006 Atmark Techno, Inc. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include <linux/init.h> +#include <linux/irq.h> +#include <asm/page.h> +#include <linux/io.h> + +#include <asm/prom.h> +#include <asm/irq.h> + +#ifdef CONFIG_SELFMOD_INTC +#include <asm/selfmod.h> +#define INTC_BASE BARRIER_BASE_ADDR +#else +static unsigned int intc_baseaddr; +#define INTC_BASE intc_baseaddr +#endif + +unsigned int nr_irq; + +/* No one else should require these constants, so define them locally here. */ +#define ISR 0x00 /* Interrupt Status Register */ +#define IPR 0x04 /* Interrupt Pending Register */ +#define IER 0x08 /* Interrupt Enable Register */ +#define IAR 0x0c /* Interrupt Acknowledge Register */ +#define SIE 0x10 /* Set Interrupt Enable bits */ +#define CIE 0x14 /* Clear Interrupt Enable bits */ +#define IVR 0x18 /* Interrupt Vector Register */ +#define MER 0x1c /* Master Enable Register */ + +#define MER_ME (1<<0) +#define MER_HIE (1<<1) + +static void intc_enable_or_unmask(unsigned int irq) +{ + pr_debug("enable_or_unmask: %d\n", irq); + out_be32(INTC_BASE + SIE, 1 << irq); +} + +static void intc_disable_or_mask(unsigned int irq) +{ + pr_debug("disable: %d\n", irq); + out_be32(INTC_BASE + CIE, 1 << irq); +} + +static void intc_ack(unsigned int irq) +{ + pr_debug("ack: %d\n", irq); + out_be32(INTC_BASE + IAR, 1 << irq); +} + +static void intc_mask_ack(unsigned int irq) +{ + unsigned long mask = 1 << irq; + pr_debug("disable_and_ack: %d\n", irq); + out_be32(INTC_BASE + CIE, mask); + out_be32(INTC_BASE + IAR, mask); +} + +static void intc_end(unsigned int irq) +{ + unsigned long mask = 1 << irq; + pr_debug("end: %d\n", irq); + if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS))) { + out_be32(INTC_BASE + SIE, mask); + /* ack level sensitive intr */ + if (irq_desc[irq].status & IRQ_LEVEL) + out_be32(INTC_BASE + IAR, mask); + } +} + +static struct irq_chip intc_dev = { + .name = "Xilinx INTC", + .unmask = intc_enable_or_unmask, + .mask = intc_disable_or_mask, + .ack = intc_ack, + .mask_ack = intc_mask_ack, + .end = intc_end, +}; + +unsigned int get_irq(struct pt_regs *regs) +{ + int irq; + + /* + * NOTE: This function is the one that needs to be improved in + * order to handle multiple interrupt controllers. It currently + * is hardcoded to check for interrupts only on the first INTC. + */ + irq = in_be32(INTC_BASE + IVR); + pr_debug("get_irq: %d\n", irq); + + return irq; +} + +void __init init_IRQ(void) +{ + u32 i, j, intr_type; + struct device_node *intc = NULL; +#ifdef CONFIG_SELFMOD_INTC + unsigned int intc_baseaddr = 0; + static int arr_func[] = { + (int)&get_irq, + (int)&intc_enable_or_unmask, + (int)&intc_disable_or_mask, + (int)&intc_mask_ack, + (int)&intc_ack, + (int)&intc_end, + 0 + }; +#endif + static char *intc_list[] = { + "xlnx,xps-intc-1.00.a", + "xlnx,opb-intc-1.00.c", + "xlnx,opb-intc-1.00.b", + "xlnx,opb-intc-1.00.a", + NULL + }; + + for (j = 0; intc_list[j] != NULL; j++) { + intc = of_find_compatible_node(NULL, NULL, intc_list[j]); + if (intc) + break; + } + + intc_baseaddr = *(int *) of_get_property(intc, "reg", NULL); + intc_baseaddr = (unsigned long) ioremap(intc_baseaddr, PAGE_SIZE); + nr_irq = *(int *) of_get_property(intc, "xlnx,num-intr-inputs", NULL); + + intr_type = + *(int *) of_get_property(intc, "xlnx,kind-of-intr", NULL); + if (intr_type >= (1 << nr_irq)) + printk(KERN_INFO " ERROR: Mishmash in king-of-intr param\n"); + +#ifdef CONFIG_SELFMOD_INTC + selfmod_function((int *) arr_func, intc_baseaddr); +#endif + printk(KERN_INFO "%s #0 at 0x%08x, num_irq=%d, edge=0x%x\n", + intc_list[j], intc_baseaddr, nr_irq, intr_type); + + /* + * Disable all external interrupts until they are + * explicity requested. + */ + out_be32(intc_baseaddr + IER, 0); + + /* Acknowledge any pending interrupts just in case. */ + out_be32(intc_baseaddr + IAR, 0xffffffff); + + /* Turn on the Master Enable. */ + out_be32(intc_baseaddr + MER, MER_HIE | MER_ME); + + for (i = 0; i < nr_irq; ++i) { + if (intr_type & (0x00000001 << i)) { + set_irq_chip_and_handler_name(i, &intc_dev, + handle_edge_irq, intc_dev.name); + irq_desc[i].status &= ~IRQ_LEVEL; + } else { + set_irq_chip_and_handler_name(i, &intc_dev, + handle_level_irq, intc_dev.name); + irq_desc[i].status |= IRQ_LEVEL; + } + } +} diff --git a/arch/microblaze/kernel/irq.c b/arch/microblaze/kernel/irq.c new file mode 100644 index 000000000000..f688ee93e3b9 --- /dev/null +++ b/arch/microblaze/kernel/irq.c @@ -0,0 +1,104 @@ +/* + * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2007-2009 PetaLogix + * Copyright (C) 2006 Atmark Techno, Inc. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/hardirq.h> +#include <linux/interrupt.h> +#include <linux/irqflags.h> +#include <linux/seq_file.h> +#include <linux/kernel_stat.h> +#include <linux/irq.h> + +#include <asm/prom.h> + +unsigned int irq_of_parse_and_map(struct device_node *dev, int index) +{ + struct of_irq oirq; + + if (of_irq_map_one(dev, index, &oirq)) + return NO_IRQ; + + return oirq.specifier[0]; +} +EXPORT_SYMBOL_GPL(irq_of_parse_and_map); + +/* + * 'what should we do if we get a hw irq event on an illegal vector'. + * each architecture has to answer this themselves. + */ +void ack_bad_irq(unsigned int irq) +{ + printk(KERN_WARNING "unexpected IRQ trap at vector %02x\n", irq); +} + +static u32 concurrent_irq; + +void do_IRQ(struct pt_regs *regs) +{ + unsigned int irq; + struct pt_regs *old_regs = set_irq_regs(regs); + + irq_enter(); + irq = get_irq(regs); +next_irq: + BUG_ON(irq == -1U); + generic_handle_irq(irq); + + irq = get_irq(regs); + if (irq != -1U) { + pr_debug("next irq: %d\n", irq); + ++concurrent_irq; + goto next_irq; + } + + irq_exit(); + set_irq_regs(old_regs); +} + +int show_interrupts(struct seq_file *p, void *v) +{ + int i = *(loff_t *) v, j; + struct irqaction *action; + unsigned long flags; + + if (i == 0) { + seq_printf(p, " "); + for_each_online_cpu(j) + seq_printf(p, "CPU%-8d", j); + seq_putc(p, '\n'); + } + + if (i < nr_irq) { + spin_lock_irqsave(&irq_desc[i].lock, flags); + action = irq_desc[i].action; + if (!action) + goto skip; + seq_printf(p, "%3d: ", i); +#ifndef CONFIG_SMP + seq_printf(p, "%10u ", kstat_irqs(i)); +#else + for_each_online_cpu(j) + seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]); +#endif + seq_printf(p, " %8s", irq_desc[i].status & + IRQ_LEVEL ? "level" : "edge"); + seq_printf(p, " %8s", irq_desc[i].chip->name); + seq_printf(p, " %s", action->name); + + for (action = action->next; action; action = action->next) + seq_printf(p, ", %s", action->name); + + seq_putc(p, '\n'); +skip: + spin_unlock_irqrestore(&irq_desc[i].lock, flags); + } + return 0; +} diff --git a/arch/microblaze/kernel/microblaze_ksyms.c b/arch/microblaze/kernel/microblaze_ksyms.c new file mode 100644 index 000000000000..5f71790e3c3c --- /dev/null +++ b/arch/microblaze/kernel/microblaze_ksyms.c @@ -0,0 +1,47 @@ +/* + * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2008-2009 PetaLogix + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/module.h> +#include <linux/string.h> +#include <linux/cryptohash.h> +#include <linux/delay.h> +#include <linux/in6.h> +#include <linux/syscalls.h> + +#include <asm/checksum.h> +#include <linux/io.h> +#include <asm/page.h> +#include <asm/system.h> +#include <linux/uaccess.h> + +/* + * libgcc functions - functions that are used internally by the + * compiler... (prototypes are not correct though, but that + * doesn't really matter since they're not versioned). + */ +extern void __ashldi3(void); +EXPORT_SYMBOL(__ashldi3); +extern void __ashrdi3(void); +EXPORT_SYMBOL(__ashrdi3); +extern void __divsi3(void); +EXPORT_SYMBOL(__divsi3); +extern void __lshrdi3(void); +EXPORT_SYMBOL(__lshrdi3); +extern void __modsi3(void); +EXPORT_SYMBOL(__modsi3); +extern void __mulsi3(void); +EXPORT_SYMBOL(__mulsi3); +extern void __muldi3(void); +EXPORT_SYMBOL(__muldi3); +extern void __ucmpdi2(void); +EXPORT_SYMBOL(__ucmpdi2); +extern void __udivsi3(void); +EXPORT_SYMBOL(__udivsi3); +extern void __umodsi3(void); +EXPORT_SYMBOL(__umodsi3); diff --git a/arch/microblaze/kernel/module.c b/arch/microblaze/kernel/module.c new file mode 100644 index 000000000000..51414171326f --- /dev/null +++ b/arch/microblaze/kernel/module.c @@ -0,0 +1,151 @@ +/* + * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2007-2009 PetaLogix + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/module.h> +#include <linux/moduleloader.h> +#include <linux/kernel.h> +#include <linux/elf.h> +#include <linux/vmalloc.h> +#include <linux/slab.h> +#include <linux/fs.h> +#include <linux/string.h> + +#include <asm/pgtable.h> + +void *module_alloc(unsigned long size) +{ + void *ret; + ret = (size == 0) ? NULL : vmalloc(size); + pr_debug("module_alloc (%08lx@%08lx)\n", size, (unsigned long int)ret); + return ret; +} + +void module_free(struct module *module, void *region) +{ + pr_debug("module_free(%s,%08lx)\n", module->name, + (unsigned long)region); + vfree(region); +} + +int module_frob_arch_sections(Elf_Ehdr *hdr, + Elf_Shdr *sechdrs, + char *secstrings, + struct module *mod) +{ + return 0; +} + +int apply_relocate(Elf32_Shdr *sechdrs, const char *strtab, + unsigned int symindex, unsigned int relsec, struct module *module) +{ + printk(KERN_ERR "module %s: ADD RELOCATION unsupported\n", + module->name); + return -ENOEXEC; +} + +int apply_relocate_add(Elf32_Shdr *sechdrs, const char *strtab, + unsigned int symindex, unsigned int relsec, struct module *module) +{ + + unsigned int i; + Elf32_Rela *rela = (void *)sechdrs[relsec].sh_addr; + Elf32_Sym *sym; + unsigned long int *location; + unsigned long int locoffs; + unsigned long int value; +#if __GNUC__ < 4 + unsigned long int old_value; +#endif + + pr_debug("Applying add relocation section %u to %u\n", + relsec, sechdrs[relsec].sh_info); + + for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rela); i++) { + + location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr + + rela[i].r_offset; + sym = (Elf32_Sym *)sechdrs[symindex].sh_addr + + ELF32_R_SYM(rela[i].r_info); + value = sym->st_value + rela[i].r_addend; + + switch (ELF32_R_TYPE(rela[i].r_info)) { + + /* + * Be careful! mb-gcc / mb-ld splits the relocs between the + * text and the reloc table. In general this means we must + * read the current contents of (*location), add any offset + * then store the result back in + */ + + case R_MICROBLAZE_32: +#if __GNUC__ < 4 + old_value = *location; + *location = value + old_value; + + pr_debug("R_MICROBLAZE_32 (%08lx->%08lx)\n", + old_value, value); +#else + *location = value; +#endif + break; + + case R_MICROBLAZE_64: +#if __GNUC__ < 4 + /* Split relocs only required/used pre gcc4.1.1 */ + old_value = ((location[0] & 0x0000FFFF) << 16) | + (location[1] & 0x0000FFFF); + value += old_value; +#endif + location[0] = (location[0] & 0xFFFF0000) | + (value >> 16); + location[1] = (location[1] & 0xFFFF0000) | + (value & 0xFFFF); +#if __GNUC__ < 4 + pr_debug("R_MICROBLAZE_64 (%08lx->%08lx)\n", + old_value, value); +#endif + break; + + case R_MICROBLAZE_64_PCREL: + locoffs = (location[0] & 0xFFFF) << 16 | + (location[1] & 0xFFFF); + value -= (unsigned long int)(location) + 4 + + locoffs; + location[0] = (location[0] & 0xFFFF0000) | + (value >> 16); + location[1] = (location[1] & 0xFFFF0000) | + (value & 0xFFFF); + pr_debug("R_MICROBLAZE_64_PCREL (%08lx)\n", + value); + break; + + case R_MICROBLAZE_NONE: + pr_debug("R_MICROBLAZE_NONE\n"); + break; + + default: + printk(KERN_ERR "module %s: " + "Unknown relocation: %u\n", + module->name, + ELF32_R_TYPE(rela->r_info)); + return -ENOEXEC; + } + } + return 0; +} + +int module_finalize(const Elf32_Ehdr *hdr, const Elf_Shdr *sechdrs, + struct module *module) +{ + return 0; +} + +void module_arch_cleanup(struct module *mod) +{ +} diff --git a/arch/microblaze/kernel/of_device.c b/arch/microblaze/kernel/of_device.c new file mode 100644 index 000000000000..9a0f7632c47c --- /dev/null +++ b/arch/microblaze/kernel/of_device.c @@ -0,0 +1,113 @@ +#include <linux/string.h> +#include <linux/kernel.h> +#include <linux/of.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/mod_devicetable.h> +#include <linux/slab.h> +#include <linux/of_device.h> + +#include <linux/errno.h> + +void of_device_make_bus_id(struct of_device *dev) +{ + static atomic_t bus_no_reg_magic; + struct device_node *node = dev->node; + const u32 *reg; + u64 addr; + int magic; + + /* + * For MMIO, get the physical address + */ + reg = of_get_property(node, "reg", NULL); + if (reg) { + addr = of_translate_address(node, reg); + if (addr != OF_BAD_ADDR) { + dev_set_name(&dev->dev, "%llx.%s", + (unsigned long long)addr, node->name); + return; + } + } + + /* + * No BusID, use the node name and add a globally incremented + * counter (and pray...) + */ + magic = atomic_add_return(1, &bus_no_reg_magic); + dev_set_name(&dev->dev, "%s.%d", node->name, magic - 1); +} +EXPORT_SYMBOL(of_device_make_bus_id); + +struct of_device *of_device_alloc(struct device_node *np, + const char *bus_id, + struct device *parent) +{ + struct of_device *dev; + + dev = kzalloc(sizeof(*dev), GFP_KERNEL); + if (!dev) + return NULL; + + dev->node = of_node_get(np); + dev->dev.dma_mask = &dev->dma_mask; + dev->dev.parent = parent; + dev->dev.release = of_release_dev; + dev->dev.archdata.of_node = np; + + if (bus_id) + dev_set_name(&dev->dev, bus_id); + else + of_device_make_bus_id(dev); + + return dev; +} +EXPORT_SYMBOL(of_device_alloc); + +int of_device_uevent(struct device *dev, struct kobj_uevent_env *env) +{ + struct of_device *ofdev; + const char *compat; + int seen = 0, cplen, sl; + + if (!dev) + return -ENODEV; + + ofdev = to_of_device(dev); + + if (add_uevent_var(env, "OF_NAME=%s", ofdev->node->name)) + return -ENOMEM; + + if (add_uevent_var(env, "OF_TYPE=%s", ofdev->node->type)) + return -ENOMEM; + + /* Since the compatible field can contain pretty much anything + * it's not really legal to split it out with commas. We split it + * up using a number of environment variables instead. */ + + compat = of_get_property(ofdev->node, "compatible", &cplen); + while (compat && *compat && cplen > 0) { + if (add_uevent_var(env, "OF_COMPATIBLE_%d=%s", seen, compat)) + return -ENOMEM; + + sl = strlen(compat) + 1; + compat += sl; + cplen -= sl; + seen++; + } + + if (add_uevent_var(env, "OF_COMPATIBLE_N=%d", seen)) + return -ENOMEM; + + /* modalias is trickier, we add it in 2 steps */ + if (add_uevent_var(env, "MODALIAS=")) + return -ENOMEM; + sl = of_device_get_modalias(ofdev, &env->buf[env->buflen-1], + sizeof(env->buf) - env->buflen); + if (sl >= (sizeof(env->buf) - env->buflen)) + return -ENOMEM; + env->buflen += sl; + + return 0; +} +EXPORT_SYMBOL(of_device_uevent); diff --git a/arch/microblaze/kernel/of_platform.c b/arch/microblaze/kernel/of_platform.c new file mode 100644 index 000000000000..acf4574d0f18 --- /dev/null +++ b/arch/microblaze/kernel/of_platform.c @@ -0,0 +1,201 @@ +/* + * Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp. + * <benh@kernel.crashing.org> + * and Arnd Bergmann, IBM Corp. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + */ + +#undef DEBUG + +#include <linux/string.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/mod_devicetable.h> +#include <linux/slab.h> +#include <linux/pci.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/of_platform.h> + +#include <linux/errno.h> +#include <linux/topology.h> +#include <asm/atomic.h> + +struct bus_type of_platform_bus_type = { + .uevent = of_device_uevent, +}; +EXPORT_SYMBOL(of_platform_bus_type); + +static int __init of_bus_driver_init(void) +{ + return of_bus_type_init(&of_platform_bus_type, "of_platform"); +} +postcore_initcall(of_bus_driver_init); + +struct of_device *of_platform_device_create(struct device_node *np, + const char *bus_id, + struct device *parent) +{ + struct of_device *dev; + + dev = of_device_alloc(np, bus_id, parent); + if (!dev) + return NULL; + + dev->dma_mask = 0xffffffffUL; + dev->dev.bus = &of_platform_bus_type; + + /* We do not fill the DMA ops for platform devices by default. + * This is currently the responsibility of the platform code + * to do such, possibly using a device notifier + */ + + if (of_device_register(dev) != 0) { + of_device_free(dev); + return NULL; + } + + return dev; +} +EXPORT_SYMBOL(of_platform_device_create); + +/** + * of_platform_bus_create - Create an OF device for a bus node and all its + * children. Optionally recursively instanciate matching busses. + * @bus: device node of the bus to instanciate + * @matches: match table, NULL to use the default, OF_NO_DEEP_PROBE to + * disallow recursive creation of child busses + */ +static int of_platform_bus_create(const struct device_node *bus, + const struct of_device_id *matches, + struct device *parent) +{ + struct device_node *child; + struct of_device *dev; + int rc = 0; + + for_each_child_of_node(bus, child) { + pr_debug(" create child: %s\n", child->full_name); + dev = of_platform_device_create(child, NULL, parent); + if (dev == NULL) + rc = -ENOMEM; + else if (!of_match_node(matches, child)) + continue; + if (rc == 0) { + pr_debug(" and sub busses\n"); + rc = of_platform_bus_create(child, matches, &dev->dev); + } + if (rc) { + of_node_put(child); + break; + } + } + return rc; +} + + +/** + * of_platform_bus_probe - Probe the device-tree for platform busses + * @root: parent of the first level to probe or NULL for the root of the tree + * @matches: match table, NULL to use the default + * @parent: parent to hook devices from, NULL for toplevel + * + * Note that children of the provided root are not instanciated as devices + * unless the specified root itself matches the bus list and is not NULL. + */ + +int of_platform_bus_probe(struct device_node *root, + const struct of_device_id *matches, + struct device *parent) +{ + struct device_node *child; + struct of_device *dev; + int rc = 0; + + if (matches == NULL) + matches = of_default_bus_ids; + if (matches == OF_NO_DEEP_PROBE) + return -EINVAL; + if (root == NULL) + root = of_find_node_by_path("/"); + else + of_node_get(root); + + pr_debug("of_platform_bus_probe()\n"); + pr_debug(" starting at: %s\n", root->full_name); + + /* Do a self check of bus type, if there's a match, create + * children + */ + if (of_match_node(matches, root)) { + pr_debug(" root match, create all sub devices\n"); + dev = of_platform_device_create(root, NULL, parent); + if (dev == NULL) { + rc = -ENOMEM; + goto bail; + } + pr_debug(" create all sub busses\n"); + rc = of_platform_bus_create(root, matches, &dev->dev); + goto bail; + } + for_each_child_of_node(root, child) { + if (!of_match_node(matches, child)) + continue; + + pr_debug(" match: %s\n", child->full_name); + dev = of_platform_device_create(child, NULL, parent); + if (dev == NULL) + rc = -ENOMEM; + else + rc = of_platform_bus_create(child, matches, &dev->dev); + if (rc) { + of_node_put(child); + break; + } + } + bail: + of_node_put(root); + return rc; +} +EXPORT_SYMBOL(of_platform_bus_probe); + +static int of_dev_node_match(struct device *dev, void *data) +{ + return to_of_device(dev)->node == data; +} + +struct of_device *of_find_device_by_node(struct device_node *np) +{ + struct device *dev; + + dev = bus_find_device(&of_platform_bus_type, + NULL, np, of_dev_node_match); + if (dev) + return to_of_device(dev); + return NULL; +} +EXPORT_SYMBOL(of_find_device_by_node); + +static int of_dev_phandle_match(struct device *dev, void *data) +{ + phandle *ph = data; + return to_of_device(dev)->node->linux_phandle == *ph; +} + +struct of_device *of_find_device_by_phandle(phandle ph) +{ + struct device *dev; + + dev = bus_find_device(&of_platform_bus_type, + NULL, &ph, of_dev_phandle_match); + if (dev) + return to_of_device(dev); + return NULL; +} +EXPORT_SYMBOL(of_find_device_by_phandle); diff --git a/arch/microblaze/kernel/process.c b/arch/microblaze/kernel/process.c new file mode 100644 index 000000000000..07d4fa339eda --- /dev/null +++ b/arch/microblaze/kernel/process.c @@ -0,0 +1,190 @@ +/* + * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2008-2009 PetaLogix + * Copyright (C) 2006 Atmark Techno, Inc. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include <linux/module.h> +#include <linux/sched.h> +#include <linux/pm.h> +#include <linux/tick.h> +#include <linux/bitops.h> +#include <asm/system.h> +#include <asm/pgalloc.h> + +void show_regs(struct pt_regs *regs) +{ + printk(KERN_INFO " Registers dump: mode=%X\r\n", regs->pt_mode); + printk(KERN_INFO " r1=%08lX, r2=%08lX, r3=%08lX, r4=%08lX\n", + regs->r1, regs->r2, regs->r3, regs->r4); + printk(KERN_INFO " r5=%08lX, r6=%08lX, r7=%08lX, r8=%08lX\n", + regs->r5, regs->r6, regs->r7, regs->r8); + printk(KERN_INFO " r9=%08lX, r10=%08lX, r11=%08lX, r12=%08lX\n", + regs->r9, regs->r10, regs->r11, regs->r12); + printk(KERN_INFO " r13=%08lX, r14=%08lX, r15=%08lX, r16=%08lX\n", + regs->r13, regs->r14, regs->r15, regs->r16); + printk(KERN_INFO " r17=%08lX, r18=%08lX, r19=%08lX, r20=%08lX\n", + regs->r17, regs->r18, regs->r19, regs->r20); + printk(KERN_INFO " r21=%08lX, r22=%08lX, r23=%08lX, r24=%08lX\n", + regs->r21, regs->r22, regs->r23, regs->r24); + printk(KERN_INFO " r25=%08lX, r26=%08lX, r27=%08lX, r28=%08lX\n", + regs->r25, regs->r26, regs->r27, regs->r28); + printk(KERN_INFO " r29=%08lX, r30=%08lX, r31=%08lX, rPC=%08lX\n", + regs->r29, regs->r30, regs->r31, regs->pc); + printk(KERN_INFO " msr=%08lX, ear=%08lX, esr=%08lX, fsr=%08lX\n", + regs->msr, regs->ear, regs->esr, regs->fsr); +} + +void (*pm_idle)(void); +void (*pm_power_off)(void) = NULL; +EXPORT_SYMBOL(pm_power_off); + +static int hlt_counter = 1; + +void disable_hlt(void) +{ + hlt_counter++; +} +EXPORT_SYMBOL(disable_hlt); + +void enable_hlt(void) +{ + hlt_counter--; +} +EXPORT_SYMBOL(enable_hlt); + +static int __init nohlt_setup(char *__unused) +{ + hlt_counter = 1; + return 1; +} +__setup("nohlt", nohlt_setup); + +static int __init hlt_setup(char *__unused) +{ + hlt_counter = 0; + return 1; +} +__setup("hlt", hlt_setup); + +void default_idle(void) +{ + if (!hlt_counter) { + clear_thread_flag(TIF_POLLING_NRFLAG); + smp_mb__after_clear_bit(); + local_irq_disable(); + while (!need_resched()) + cpu_sleep(); + local_irq_enable(); + set_thread_flag(TIF_POLLING_NRFLAG); + } else + while (!need_resched()) + cpu_relax(); +} + +void cpu_idle(void) +{ + set_thread_flag(TIF_POLLING_NRFLAG); + + /* endless idle loop with no priority at all */ + while (1) { + void (*idle)(void) = pm_idle; + + if (!idle) + idle = default_idle; + + tick_nohz_stop_sched_tick(1); + while (!need_resched()) + idle(); + tick_nohz_restart_sched_tick(); + + preempt_enable_no_resched(); + schedule(); + preempt_disable(); + check_pgt_cache(); + } +} + +void flush_thread(void) +{ +} + +int copy_thread(unsigned long clone_flags, unsigned long usp, + unsigned long unused, + struct task_struct *p, struct pt_regs *regs) +{ + struct pt_regs *childregs = task_pt_regs(p); + struct thread_info *ti = task_thread_info(p); + + *childregs = *regs; + if (user_mode(regs)) + childregs->r1 = usp; + else + childregs->r1 = ((unsigned long) ti) + THREAD_SIZE; + + memset(&ti->cpu_context, 0, sizeof(struct cpu_context)); + ti->cpu_context.r1 = (unsigned long)childregs; + ti->cpu_context.msr = (unsigned long)childregs->msr; + ti->cpu_context.r15 = (unsigned long)ret_from_fork - 8; + + if (clone_flags & CLONE_SETTLS) + ; + + return 0; +} + +/* + * Return saved PC of a blocked thread. + */ +unsigned long thread_saved_pc(struct task_struct *tsk) +{ + struct cpu_context *ctx = + &(((struct thread_info *)(tsk->stack))->cpu_context); + + /* Check whether the thread is blocked in resume() */ + if (in_sched_functions(ctx->r15)) + return (unsigned long)ctx->r15; + else + return ctx->r14; +} + +static void kernel_thread_helper(int (*fn)(void *), void *arg) +{ + fn(arg); + do_exit(-1); +} + +int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags) +{ + struct pt_regs regs; + + memset(®s, 0, sizeof(regs)); + /* store them in non-volatile registers */ + regs.r5 = (unsigned long)fn; + regs.r6 = (unsigned long)arg; + local_save_flags(regs.msr); + regs.pc = (unsigned long)kernel_thread_helper; + regs.pt_mode = 1; + + return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, + ®s, 0, NULL, NULL); +} + +unsigned long get_wchan(struct task_struct *p) +{ +/* TBD (used by procfs) */ + return 0; +} + +/* Set up a thread for executing a new program */ +void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long usp) +{ + set_fs(USER_DS); + regs->pc = pc; + regs->r1 = usp; + regs->pt_mode = 0; +} diff --git a/arch/microblaze/kernel/prom.c b/arch/microblaze/kernel/prom.c new file mode 100644 index 000000000000..34c48718061a --- /dev/null +++ b/arch/microblaze/kernel/prom.c @@ -0,0 +1,1146 @@ +/* + * Procedures for creating, accessing and interpreting the device tree. + * + * Paul Mackerras August 1996. + * Copyright (C) 1996-2005 Paul Mackerras. + * + * Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner. + * {engebret|bergner}@us.ibm.com + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#include <stdarg.h> +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/init.h> +#include <linux/threads.h> +#include <linux/spinlock.h> +#include <linux/types.h> +#include <linux/pci.h> +#include <linux/stringify.h> +#include <linux/delay.h> +#include <linux/initrd.h> +#include <linux/bitops.h> +#include <linux/module.h> +#include <linux/kexec.h> +#include <linux/debugfs.h> +#include <linux/irq.h> +#include <linux/lmb.h> + +#include <asm/prom.h> +#include <asm/page.h> +#include <asm/processor.h> +#include <asm/irq.h> +#include <linux/io.h> +#include <asm/system.h> +#include <asm/mmu.h> +#include <asm/pgtable.h> +#include <asm/sections.h> +#include <asm/pci-bridge.h> + +static int __initdata dt_root_addr_cells; +static int __initdata dt_root_size_cells; + +typedef u32 cell_t; + +static struct boot_param_header *initial_boot_params; + +/* export that to outside world */ +struct device_node *of_chosen; + +static inline char *find_flat_dt_string(u32 offset) +{ + return ((char *)initial_boot_params) + + initial_boot_params->off_dt_strings + offset; +} + +/** + * This function is used to scan the flattened device-tree, it is + * used to extract the memory informations at boot before we can + * unflatten the tree + */ +int __init of_scan_flat_dt(int (*it)(unsigned long node, + const char *uname, int depth, + void *data), + void *data) +{ + unsigned long p = ((unsigned long)initial_boot_params) + + initial_boot_params->off_dt_struct; + int rc = 0; + int depth = -1; + + do { + u32 tag = *((u32 *)p); + char *pathp; + + p += 4; + if (tag == OF_DT_END_NODE) { + depth--; + continue; + } + if (tag == OF_DT_NOP) + continue; + if (tag == OF_DT_END) + break; + if (tag == OF_DT_PROP) { + u32 sz = *((u32 *)p); + p += 8; + if (initial_boot_params->version < 0x10) + p = _ALIGN(p, sz >= 8 ? 8 : 4); + p += sz; + p = _ALIGN(p, 4); + continue; + } + if (tag != OF_DT_BEGIN_NODE) { + printk(KERN_WARNING "Invalid tag %x scanning flattened" + " device tree !\n", tag); + return -EINVAL; + } + depth++; + pathp = (char *)p; + p = _ALIGN(p + strlen(pathp) + 1, 4); + if ((*pathp) == '/') { + char *lp, *np; + for (lp = NULL, np = pathp; *np; np++) + if ((*np) == '/') + lp = np+1; + if (lp != NULL) + pathp = lp; + } + rc = it(p, pathp, depth, data); + if (rc != 0) + break; + } while (1); + + return rc; +} + +unsigned long __init of_get_flat_dt_root(void) +{ + unsigned long p = ((unsigned long)initial_boot_params) + + initial_boot_params->off_dt_struct; + + while (*((u32 *)p) == OF_DT_NOP) + p += 4; + BUG_ON(*((u32 *)p) != OF_DT_BEGIN_NODE); + p += 4; + return _ALIGN(p + strlen((char *)p) + 1, 4); +} + +/** + * This function can be used within scan_flattened_dt callback to get + * access to properties + */ +void *__init of_get_flat_dt_prop(unsigned long node, const char *name, + unsigned long *size) +{ + unsigned long p = node; + + do { + u32 tag = *((u32 *)p); + u32 sz, noff; + const char *nstr; + + p += 4; + if (tag == OF_DT_NOP) + continue; + if (tag != OF_DT_PROP) + return NULL; + + sz = *((u32 *)p); + noff = *((u32 *)(p + 4)); + p += 8; + if (initial_boot_params->version < 0x10) + p = _ALIGN(p, sz >= 8 ? 8 : 4); + + nstr = find_flat_dt_string(noff); + if (nstr == NULL) { + printk(KERN_WARNING "Can't find property index" + " name !\n"); + return NULL; + } + if (strcmp(name, nstr) == 0) { + if (size) + *size = sz; + return (void *)p; + } + p += sz; + p = _ALIGN(p, 4); + } while (1); +} + +int __init of_flat_dt_is_compatible(unsigned long node, const char *compat) +{ + const char *cp; + unsigned long cplen, l; + + cp = of_get_flat_dt_prop(node, "compatible", &cplen); + if (cp == NULL) + return 0; + while (cplen > 0) { + if (strncasecmp(cp, compat, strlen(compat)) == 0) + return 1; + l = strlen(cp) + 1; + cp += l; + cplen -= l; + } + + return 0; +} + +static void *__init unflatten_dt_alloc(unsigned long *mem, unsigned long size, + unsigned long align) +{ + void *res; + + *mem = _ALIGN(*mem, align); + res = (void *)*mem; + *mem += size; + + return res; +} + +static unsigned long __init unflatten_dt_node(unsigned long mem, + unsigned long *p, + struct device_node *dad, + struct device_node ***allnextpp, + unsigned long fpsize) +{ + struct device_node *np; + struct property *pp, **prev_pp = NULL; + char *pathp; + u32 tag; + unsigned int l, allocl; + int has_name = 0; + int new_format = 0; + + tag = *((u32 *)(*p)); + if (tag != OF_DT_BEGIN_NODE) { + printk("Weird tag at start of node: %x\n", tag); + return mem; + } + *p += 4; + pathp = (char *)*p; + l = allocl = strlen(pathp) + 1; + *p = _ALIGN(*p + l, 4); + + /* version 0x10 has a more compact unit name here instead of the full + * path. we accumulate the full path size using "fpsize", we'll rebuild + * it later. We detect this because the first character of the name is + * not '/'. + */ + if ((*pathp) != '/') { + new_format = 1; + if (fpsize == 0) { + /* root node: special case. fpsize accounts for path + * plus terminating zero. root node only has '/', so + * fpsize should be 2, but we want to avoid the first + * level nodes to have two '/' so we use fpsize 1 here + */ + fpsize = 1; + allocl = 2; + } else { + /* account for '/' and path size minus terminal 0 + * already in 'l' + */ + fpsize += l; + allocl = fpsize; + } + } + + np = unflatten_dt_alloc(&mem, sizeof(struct device_node) + allocl, + __alignof__(struct device_node)); + if (allnextpp) { + memset(np, 0, sizeof(*np)); + np->full_name = ((char *)np) + sizeof(struct device_node); + if (new_format) { + char *p2 = np->full_name; + /* rebuild full path for new format */ + if (dad && dad->parent) { + strcpy(p2, dad->full_name); +#ifdef DEBUG + if ((strlen(p2) + l + 1) != allocl) { + pr_debug("%s: p: %d, l: %d, a: %d\n", + pathp, (int)strlen(p2), + l, allocl); + } +#endif + p2 += strlen(p2); + } + *(p2++) = '/'; + memcpy(p2, pathp, l); + } else + memcpy(np->full_name, pathp, l); + prev_pp = &np->properties; + **allnextpp = np; + *allnextpp = &np->allnext; + if (dad != NULL) { + np->parent = dad; + /* we temporarily use the next field as `last_child'*/ + if (dad->next == NULL) + dad->child = np; + else + dad->next->sibling = np; + dad->next = np; + } + kref_init(&np->kref); + } + while (1) { + u32 sz, noff; + char *pname; + + tag = *((u32 *)(*p)); + if (tag == OF_DT_NOP) { + *p += 4; + continue; + } + if (tag != OF_DT_PROP) + break; + *p += 4; + sz = *((u32 *)(*p)); + noff = *((u32 *)((*p) + 4)); + *p += 8; + if (initial_boot_params->version < 0x10) + *p = _ALIGN(*p, sz >= 8 ? 8 : 4); + + pname = find_flat_dt_string(noff); + if (pname == NULL) { + printk(KERN_INFO + "Can't find property name in list !\n"); + break; + } + if (strcmp(pname, "name") == 0) + has_name = 1; + l = strlen(pname) + 1; + pp = unflatten_dt_alloc(&mem, sizeof(struct property), + __alignof__(struct property)); + if (allnextpp) { + if (strcmp(pname, "linux,phandle") == 0) { + np->node = *((u32 *)*p); + if (np->linux_phandle == 0) + np->linux_phandle = np->node; + } + if (strcmp(pname, "ibm,phandle") == 0) + np->linux_phandle = *((u32 *)*p); + pp->name = pname; + pp->length = sz; + pp->value = (void *)*p; + *prev_pp = pp; + prev_pp = &pp->next; + } + *p = _ALIGN((*p) + sz, 4); + } + /* with version 0x10 we may not have the name property, recreate + * it here from the unit name if absent + */ + if (!has_name) { + char *p1 = pathp, *ps = pathp, *pa = NULL; + int sz; + + while (*p1) { + if ((*p1) == '@') + pa = p1; + if ((*p1) == '/') + ps = p1 + 1; + p1++; + } + if (pa < ps) + pa = p1; + sz = (pa - ps) + 1; + pp = unflatten_dt_alloc(&mem, sizeof(struct property) + sz, + __alignof__(struct property)); + if (allnextpp) { + pp->name = "name"; + pp->length = sz; + pp->value = pp + 1; + *prev_pp = pp; + prev_pp = &pp->next; + memcpy(pp->value, ps, sz - 1); + ((char *)pp->value)[sz - 1] = 0; + pr_debug("fixed up name for %s -> %s\n", pathp, + (char *)pp->value); + } + } + if (allnextpp) { + *prev_pp = NULL; + np->name = of_get_property(np, "name", NULL); + np->type = of_get_property(np, "device_type", NULL); + + if (!np->name) + np->name = "<NULL>"; + if (!np->type) + np->type = "<NULL>"; + } + while (tag == OF_DT_BEGIN_NODE) { + mem = unflatten_dt_node(mem, p, np, allnextpp, fpsize); + tag = *((u32 *)(*p)); + } + if (tag != OF_DT_END_NODE) { + printk(KERN_INFO "Weird tag at end of node: %x\n", tag); + return mem; + } + *p += 4; + return mem; +} + +/** + * unflattens the device-tree passed by the firmware, creating the + * tree of struct device_node. It also fills the "name" and "type" + * pointers of the nodes so the normal device-tree walking functions + * can be used (this used to be done by finish_device_tree) + */ +void __init unflatten_device_tree(void) +{ + unsigned long start, mem, size; + struct device_node **allnextp = &allnodes; + + pr_debug(" -> unflatten_device_tree()\n"); + + /* First pass, scan for size */ + start = ((unsigned long)initial_boot_params) + + initial_boot_params->off_dt_struct; + size = unflatten_dt_node(0, &start, NULL, NULL, 0); + size = (size | 3) + 1; + + pr_debug(" size is %lx, allocating...\n", size); + + /* Allocate memory for the expanded device tree */ + mem = lmb_alloc(size + 4, __alignof__(struct device_node)); + mem = (unsigned long) __va(mem); + + ((u32 *)mem)[size / 4] = 0xdeadbeef; + + pr_debug(" unflattening %lx...\n", mem); + + /* Second pass, do actual unflattening */ + start = ((unsigned long)initial_boot_params) + + initial_boot_params->off_dt_struct; + unflatten_dt_node(mem, &start, NULL, &allnextp, 0); + if (*((u32 *)start) != OF_DT_END) + printk(KERN_WARNING "Weird tag at end of tree: %08x\n", + *((u32 *)start)); + if (((u32 *)mem)[size / 4] != 0xdeadbeef) + printk(KERN_WARNING "End of tree marker overwritten: %08x\n", + ((u32 *)mem)[size / 4]); + *allnextp = NULL; + + /* Get pointer to OF "/chosen" node for use everywhere */ + of_chosen = of_find_node_by_path("/chosen"); + if (of_chosen == NULL) + of_chosen = of_find_node_by_path("/chosen@0"); + + pr_debug(" <- unflatten_device_tree()\n"); +} + +#define early_init_dt_scan_drconf_memory(node) 0 + +static int __init early_init_dt_scan_cpus(unsigned long node, + const char *uname, int depth, + void *data) +{ + static int logical_cpuid; + char *type = of_get_flat_dt_prop(node, "device_type", NULL); + const u32 *intserv; + int i, nthreads; + int found = 0; + + /* We are scanning "cpu" nodes only */ + if (type == NULL || strcmp(type, "cpu") != 0) + return 0; + + /* Get physical cpuid */ + intserv = of_get_flat_dt_prop(node, "reg", NULL); + nthreads = 1; + + /* + * Now see if any of these threads match our boot cpu. + * NOTE: This must match the parsing done in smp_setup_cpu_maps. + */ + for (i = 0; i < nthreads; i++) { + /* + * version 2 of the kexec param format adds the phys cpuid of + * booted proc. + */ + if (initial_boot_params && initial_boot_params->version >= 2) { + if (intserv[i] == + initial_boot_params->boot_cpuid_phys) { + found = 1; + break; + } + } else { + /* + * Check if it's the boot-cpu, set it's hw index now, + * unfortunately this format did not support booting + * off secondary threads. + */ + if (of_get_flat_dt_prop(node, + "linux,boot-cpu", NULL) != NULL) { + found = 1; + break; + } + } + +#ifdef CONFIG_SMP + /* logical cpu id is always 0 on UP kernels */ + logical_cpuid++; +#endif + } + + if (found) { + pr_debug("boot cpu: logical %d physical %d\n", logical_cpuid, + intserv[i]); + boot_cpuid = logical_cpuid; + } + + return 0; +} + +#ifdef CONFIG_BLK_DEV_INITRD +static void __init early_init_dt_check_for_initrd(unsigned long node) +{ + unsigned long l; + u32 *prop; + + pr_debug("Looking for initrd properties... "); + + prop = of_get_flat_dt_prop(node, "linux,initrd-start", &l); + if (prop) { + initrd_start = (unsigned long)__va(of_read_ulong(prop, l/4)); + + prop = of_get_flat_dt_prop(node, "linux,initrd-end", &l); + if (prop) { + initrd_end = (unsigned long) + __va(of_read_ulong(prop, l/4)); + initrd_below_start_ok = 1; + } else { + initrd_start = 0; + } + } + + pr_debug("initrd_start=0x%lx initrd_end=0x%lx\n", + initrd_start, initrd_end); +} +#else +static inline void early_init_dt_check_for_initrd(unsigned long node) +{ +} +#endif /* CONFIG_BLK_DEV_INITRD */ + +static int __init early_init_dt_scan_chosen(unsigned long node, + const char *uname, int depth, void *data) +{ + unsigned long l; + char *p; + + pr_debug("search \"chosen\", depth: %d, uname: %s\n", depth, uname); + + if (depth != 1 || + (strcmp(uname, "chosen") != 0 && + strcmp(uname, "chosen@0") != 0)) + return 0; + +#ifdef CONFIG_KEXEC + lprop = (u64 *)of_get_flat_dt_prop(node, + "linux,crashkernel-base", NULL); + if (lprop) + crashk_res.start = *lprop; + + lprop = (u64 *)of_get_flat_dt_prop(node, + "linux,crashkernel-size", NULL); + if (lprop) + crashk_res.end = crashk_res.start + *lprop - 1; +#endif + + early_init_dt_check_for_initrd(node); + + /* Retreive command line */ + p = of_get_flat_dt_prop(node, "bootargs", &l); + if (p != NULL && l > 0) + strlcpy(cmd_line, p, min((int)l, COMMAND_LINE_SIZE)); + +#ifdef CONFIG_CMDLINE + if (p == NULL || l == 0 || (l == 1 && (*p) == 0)) + strlcpy(cmd_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE); +#endif /* CONFIG_CMDLINE */ + + pr_debug("Command line is: %s\n", cmd_line); + + /* break now */ + return 1; +} + +static int __init early_init_dt_scan_root(unsigned long node, + const char *uname, int depth, void *data) +{ + u32 *prop; + + if (depth != 0) + return 0; + + prop = of_get_flat_dt_prop(node, "#size-cells", NULL); + dt_root_size_cells = (prop == NULL) ? 1 : *prop; + pr_debug("dt_root_size_cells = %x\n", dt_root_size_cells); + + prop = of_get_flat_dt_prop(node, "#address-cells", NULL); + dt_root_addr_cells = (prop == NULL) ? 2 : *prop; + pr_debug("dt_root_addr_cells = %x\n", dt_root_addr_cells); + + /* break now */ + return 1; +} + +static u64 __init dt_mem_next_cell(int s, cell_t **cellp) +{ + cell_t *p = *cellp; + + *cellp = p + s; + return of_read_number(p, s); +} + +static int __init early_init_dt_scan_memory(unsigned long node, + const char *uname, int depth, void *data) +{ + char *type = of_get_flat_dt_prop(node, "device_type", NULL); + cell_t *reg, *endp; + unsigned long l; + + /* Look for the ibm,dynamic-reconfiguration-memory node */ +/* if (depth == 1 && + strcmp(uname, "ibm,dynamic-reconfiguration-memory") == 0) + return early_init_dt_scan_drconf_memory(node); +*/ + /* We are scanning "memory" nodes only */ + if (type == NULL) { + /* + * The longtrail doesn't have a device_type on the + * /memory node, so look for the node called /memory@0. + */ + if (depth != 1 || strcmp(uname, "memory@0") != 0) + return 0; + } else if (strcmp(type, "memory") != 0) + return 0; + + reg = (cell_t *)of_get_flat_dt_prop(node, "linux,usable-memory", &l); + if (reg == NULL) + reg = (cell_t *)of_get_flat_dt_prop(node, "reg", &l); + if (reg == NULL) + return 0; + + endp = reg + (l / sizeof(cell_t)); + + pr_debug("memory scan node %s, reg size %ld, data: %x %x %x %x,\n", + uname, l, reg[0], reg[1], reg[2], reg[3]); + + while ((endp - reg) >= (dt_root_addr_cells + dt_root_size_cells)) { + u64 base, size; + + base = dt_mem_next_cell(dt_root_addr_cells, ®); + size = dt_mem_next_cell(dt_root_size_cells, ®); + + if (size == 0) + continue; + pr_debug(" - %llx , %llx\n", (unsigned long long)base, + (unsigned long long)size); + + lmb_add(base, size); + } + return 0; +} + +#ifdef CONFIG_PHYP_DUMP +/** + * phyp_dump_calculate_reserve_size() - reserve variable boot area 5% or arg + * + * Function to find the largest size we need to reserve + * during early boot process. + * + * It either looks for boot param and returns that OR + * returns larger of 256 or 5% rounded down to multiples of 256MB. + * + */ +static inline unsigned long phyp_dump_calculate_reserve_size(void) +{ + unsigned long tmp; + + if (phyp_dump_info->reserve_bootvar) + return phyp_dump_info->reserve_bootvar; + + /* divide by 20 to get 5% of value */ + tmp = lmb_end_of_DRAM(); + do_div(tmp, 20); + + /* round it down in multiples of 256 */ + tmp = tmp & ~0x0FFFFFFFUL; + + return (tmp > PHYP_DUMP_RMR_END ? tmp : PHYP_DUMP_RMR_END); +} + +/** + * phyp_dump_reserve_mem() - reserve all not-yet-dumped mmemory + * + * This routine may reserve memory regions in the kernel only + * if the system is supported and a dump was taken in last + * boot instance or if the hardware is supported and the + * scratch area needs to be setup. In other instances it returns + * without reserving anything. The memory in case of dump being + * active is freed when the dump is collected (by userland tools). + */ +static void __init phyp_dump_reserve_mem(void) +{ + unsigned long base, size; + unsigned long variable_reserve_size; + + if (!phyp_dump_info->phyp_dump_configured) { + printk(KERN_ERR "Phyp-dump not supported on this hardware\n"); + return; + } + + if (!phyp_dump_info->phyp_dump_at_boot) { + printk(KERN_INFO "Phyp-dump disabled at boot time\n"); + return; + } + + variable_reserve_size = phyp_dump_calculate_reserve_size(); + + if (phyp_dump_info->phyp_dump_is_active) { + /* Reserve *everything* above RMR.Area freed by userland tools*/ + base = variable_reserve_size; + size = lmb_end_of_DRAM() - base; + + /* XXX crashed_ram_end is wrong, since it may be beyond + * the memory_limit, it will need to be adjusted. */ + lmb_reserve(base, size); + + phyp_dump_info->init_reserve_start = base; + phyp_dump_info->init_reserve_size = size; + } else { + size = phyp_dump_info->cpu_state_size + + phyp_dump_info->hpte_region_size + + variable_reserve_size; + base = lmb_end_of_DRAM() - size; + lmb_reserve(base, size); + phyp_dump_info->init_reserve_start = base; + phyp_dump_info->init_reserve_size = size; + } +} +#else +static inline void __init phyp_dump_reserve_mem(void) {} +#endif /* CONFIG_PHYP_DUMP && CONFIG_PPC_RTAS */ + +#ifdef CONFIG_EARLY_PRINTK +/* MS this is Microblaze specifig function */ +static int __init early_init_dt_scan_serial(unsigned long node, + const char *uname, int depth, void *data) +{ + unsigned long l; + char *p; + int *addr; + + pr_debug("search \"chosen\", depth: %d, uname: %s\n", depth, uname); + +/* find all serial nodes */ + if (strncmp(uname, "serial", 6) != 0) + return 0; + + early_init_dt_check_for_initrd(node); + +/* find compatible node with uartlite */ + p = of_get_flat_dt_prop(node, "compatible", &l); + if ((strncmp(p, "xlnx,xps-uartlite", 17) != 0) && + (strncmp(p, "xlnx,opb-uartlite", 17) != 0)) + return 0; + + addr = of_get_flat_dt_prop(node, "reg", &l); + return *addr; /* return address */ +} + +/* this function is looking for early uartlite console - Microblaze specific */ +int __init early_uartlite_console(void) +{ + return of_scan_flat_dt(early_init_dt_scan_serial, NULL); +} +#endif + +void __init early_init_devtree(void *params) +{ + pr_debug(" -> early_init_devtree(%p)\n", params); + + /* Setup flat device-tree pointer */ + initial_boot_params = params; + +#ifdef CONFIG_PHYP_DUMP + /* scan tree to see if dump occured during last boot */ + of_scan_flat_dt(early_init_dt_scan_phyp_dump, NULL); +#endif + + /* Retrieve various informations from the /chosen node of the + * device-tree, including the platform type, initrd location and + * size, TCE reserve, and more ... + */ + of_scan_flat_dt(early_init_dt_scan_chosen, NULL); + + /* Scan memory nodes and rebuild LMBs */ + lmb_init(); + of_scan_flat_dt(early_init_dt_scan_root, NULL); + of_scan_flat_dt(early_init_dt_scan_memory, NULL); + + /* Save command line for /proc/cmdline and then parse parameters */ + strlcpy(boot_command_line, cmd_line, COMMAND_LINE_SIZE); + parse_early_param(); + + lmb_analyze(); + + pr_debug("Phys. mem: %lx\n", (unsigned long) lmb_phys_mem_size()); + + pr_debug("Scanning CPUs ...\n"); + + /* Retreive CPU related informations from the flat tree + * (altivec support, boot CPU ID, ...) + */ + of_scan_flat_dt(early_init_dt_scan_cpus, NULL); + + pr_debug(" <- early_init_devtree()\n"); +} + +/** + * Indicates whether the root node has a given value in its + * compatible property. + */ +int machine_is_compatible(const char *compat) +{ + struct device_node *root; + int rc = 0; + + root = of_find_node_by_path("/"); + if (root) { + rc = of_device_is_compatible(root, compat); + of_node_put(root); + } + return rc; +} +EXPORT_SYMBOL(machine_is_compatible); + +/******* + * + * New implementation of the OF "find" APIs, return a refcounted + * object, call of_node_put() when done. The device tree and list + * are protected by a rw_lock. + * + * Note that property management will need some locking as well, + * this isn't dealt with yet. + * + *******/ + +/** + * of_find_node_by_phandle - Find a node given a phandle + * @handle: phandle of the node to find + * + * Returns a node pointer with refcount incremented, use + * of_node_put() on it when done. + */ +struct device_node *of_find_node_by_phandle(phandle handle) +{ + struct device_node *np; + + read_lock(&devtree_lock); + for (np = allnodes; np != NULL; np = np->allnext) + if (np->linux_phandle == handle) + break; + of_node_get(np); + read_unlock(&devtree_lock); + return np; +} +EXPORT_SYMBOL(of_find_node_by_phandle); + +/** + * of_find_all_nodes - Get next node in global list + * @prev: Previous node or NULL to start iteration + * of_node_put() will be called on it + * + * Returns a node pointer with refcount incremented, use + * of_node_put() on it when done. + */ +struct device_node *of_find_all_nodes(struct device_node *prev) +{ + struct device_node *np; + + read_lock(&devtree_lock); + np = prev ? prev->allnext : allnodes; + for (; np != NULL; np = np->allnext) + if (of_node_get(np)) + break; + of_node_put(prev); + read_unlock(&devtree_lock); + return np; +} +EXPORT_SYMBOL(of_find_all_nodes); + +/** + * of_node_get - Increment refcount of a node + * @node: Node to inc refcount, NULL is supported to + * simplify writing of callers + * + * Returns node. + */ +struct device_node *of_node_get(struct device_node *node) +{ + if (node) + kref_get(&node->kref); + return node; +} +EXPORT_SYMBOL(of_node_get); + +static inline struct device_node *kref_to_device_node(struct kref *kref) +{ + return container_of(kref, struct device_node, kref); +} + +/** + * of_node_release - release a dynamically allocated node + * @kref: kref element of the node to be released + * + * In of_node_put() this function is passed to kref_put() + * as the destructor. + */ +static void of_node_release(struct kref *kref) +{ + struct device_node *node = kref_to_device_node(kref); + struct property *prop = node->properties; + + /* We should never be releasing nodes that haven't been detached. */ + if (!of_node_check_flag(node, OF_DETACHED)) { + printk(KERN_INFO "WARNING: Bad of_node_put() on %s\n", + node->full_name); + dump_stack(); + kref_init(&node->kref); + return; + } + + if (!of_node_check_flag(node, OF_DYNAMIC)) + return; + + while (prop) { + struct property *next = prop->next; + kfree(prop->name); + kfree(prop->value); + kfree(prop); + prop = next; + + if (!prop) { + prop = node->deadprops; + node->deadprops = NULL; + } + } + kfree(node->full_name); + kfree(node->data); + kfree(node); +} + +/** + * of_node_put - Decrement refcount of a node + * @node: Node to dec refcount, NULL is supported to + * simplify writing of callers + * + */ +void of_node_put(struct device_node *node) +{ + if (node) + kref_put(&node->kref, of_node_release); +} +EXPORT_SYMBOL(of_node_put); + +/* + * Plug a device node into the tree and global list. + */ +void of_attach_node(struct device_node *np) +{ + unsigned long flags; + + write_lock_irqsave(&devtree_lock, flags); + np->sibling = np->parent->child; + np->allnext = allnodes; + np->parent->child = np; + allnodes = np; + write_unlock_irqrestore(&devtree_lock, flags); +} + +/* + * "Unplug" a node from the device tree. The caller must hold + * a reference to the node. The memory associated with the node + * is not freed until its refcount goes to zero. + */ +void of_detach_node(struct device_node *np) +{ + struct device_node *parent; + unsigned long flags; + + write_lock_irqsave(&devtree_lock, flags); + + parent = np->parent; + if (!parent) + goto out_unlock; + + if (allnodes == np) + allnodes = np->allnext; + else { + struct device_node *prev; + for (prev = allnodes; + prev->allnext != np; + prev = prev->allnext) + ; + prev->allnext = np->allnext; + } + + if (parent->child == np) + parent->child = np->sibling; + else { + struct device_node *prevsib; + for (prevsib = np->parent->child; + prevsib->sibling != np; + prevsib = prevsib->sibling) + ; + prevsib->sibling = np->sibling; + } + + of_node_set_flag(np, OF_DETACHED); + +out_unlock: + write_unlock_irqrestore(&devtree_lock, flags); +} + +/* + * Add a property to a node + */ +int prom_add_property(struct device_node *np, struct property *prop) +{ + struct property **next; + unsigned long flags; + + prop->next = NULL; + write_lock_irqsave(&devtree_lock, flags); + next = &np->properties; + while (*next) { + if (strcmp(prop->name, (*next)->name) == 0) { + /* duplicate ! don't insert it */ + write_unlock_irqrestore(&devtree_lock, flags); + return -1; + } + next = &(*next)->next; + } + *next = prop; + write_unlock_irqrestore(&devtree_lock, flags); + +#ifdef CONFIG_PROC_DEVICETREE + /* try to add to proc as well if it was initialized */ + if (np->pde) + proc_device_tree_add_prop(np->pde, prop); +#endif /* CONFIG_PROC_DEVICETREE */ + + return 0; +} + +/* + * Remove a property from a node. Note that we don't actually + * remove it, since we have given out who-knows-how-many pointers + * to the data using get-property. Instead we just move the property + * to the "dead properties" list, so it won't be found any more. + */ +int prom_remove_property(struct device_node *np, struct property *prop) +{ + struct property **next; + unsigned long flags; + int found = 0; + + write_lock_irqsave(&devtree_lock, flags); + next = &np->properties; + while (*next) { + if (*next == prop) { + /* found the node */ + *next = prop->next; + prop->next = np->deadprops; + np->deadprops = prop; + found = 1; + break; + } + next = &(*next)->next; + } + write_unlock_irqrestore(&devtree_lock, flags); + + if (!found) + return -ENODEV; + +#ifdef CONFIG_PROC_DEVICETREE + /* try to remove the proc node as well */ + if (np->pde) + proc_device_tree_remove_prop(np->pde, prop); +#endif /* CONFIG_PROC_DEVICETREE */ + + return 0; +} + +/* + * Update a property in a node. Note that we don't actually + * remove it, since we have given out who-knows-how-many pointers + * to the data using get-property. Instead we just move the property + * to the "dead properties" list, and add the new property to the + * property list + */ +int prom_update_property(struct device_node *np, + struct property *newprop, + struct property *oldprop) +{ + struct property **next; + unsigned long flags; + int found = 0; + + write_lock_irqsave(&devtree_lock, flags); + next = &np->properties; + while (*next) { + if (*next == oldprop) { + /* found the node */ + newprop->next = oldprop->next; + *next = newprop; + oldprop->next = np->deadprops; + np->deadprops = oldprop; + found = 1; + break; + } + next = &(*next)->next; + } + write_unlock_irqrestore(&devtree_lock, flags); + + if (!found) + return -ENODEV; + +#ifdef CONFIG_PROC_DEVICETREE + /* try to add to proc as well if it was initialized */ + if (np->pde) + proc_device_tree_update_prop(np->pde, newprop, oldprop); +#endif /* CONFIG_PROC_DEVICETREE */ + + return 0; +} + +#if defined(CONFIG_DEBUG_FS) && defined(DEBUG) +static struct debugfs_blob_wrapper flat_dt_blob; + +static int __init export_flat_device_tree(void) +{ + struct dentry *d; + + flat_dt_blob.data = initial_boot_params; + flat_dt_blob.size = initial_boot_params->totalsize; + + d = debugfs_create_blob("flat-device-tree", S_IFREG | S_IRUSR, + of_debugfs_root, &flat_dt_blob); + if (!d) + return 1; + + return 0; +} +device_initcall(export_flat_device_tree); +#endif diff --git a/arch/microblaze/kernel/prom_parse.c b/arch/microblaze/kernel/prom_parse.c new file mode 100644 index 000000000000..ae0352ecd5a9 --- /dev/null +++ b/arch/microblaze/kernel/prom_parse.c @@ -0,0 +1,1025 @@ +#undef DEBUG + +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/pci_regs.h> +#include <linux/module.h> +#include <linux/ioport.h> +#include <linux/etherdevice.h> +#include <asm/prom.h> +#include <asm/pci-bridge.h> + +#define PRu64 "%llx" + +/* Max address size we deal with */ +#define OF_MAX_ADDR_CELLS 4 +#define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \ + (ns) > 0) + +static struct of_bus *of_match_bus(struct device_node *np); +static int __of_address_to_resource(struct device_node *dev, + const u32 *addrp, u64 size, unsigned int flags, + struct resource *r); + +/* Debug utility */ +#ifdef DEBUG +static void of_dump_addr(const char *s, const u32 *addr, int na) +{ + printk(KERN_INFO "%s", s); + while (na--) + printk(KERN_INFO " %08x", *(addr++)); + printk(KERN_INFO "\n"); +} +#else +static void of_dump_addr(const char *s, const u32 *addr, int na) { } +#endif + +/* Callbacks for bus specific translators */ +struct of_bus { + const char *name; + const char *addresses; + int (*match)(struct device_node *parent); + void (*count_cells)(struct device_node *child, + int *addrc, int *sizec); + u64 (*map)(u32 *addr, const u32 *range, + int na, int ns, int pna); + int (*translate)(u32 *addr, u64 offset, int na); + unsigned int (*get_flags)(const u32 *addr); +}; + +/* + * Default translator (generic bus) + */ + +static void of_bus_default_count_cells(struct device_node *dev, + int *addrc, int *sizec) +{ + if (addrc) + *addrc = of_n_addr_cells(dev); + if (sizec) + *sizec = of_n_size_cells(dev); +} + +static u64 of_bus_default_map(u32 *addr, const u32 *range, + int na, int ns, int pna) +{ + u64 cp, s, da; + + cp = of_read_number(range, na); + s = of_read_number(range + na + pna, ns); + da = of_read_number(addr, na); + + pr_debug("OF: default map, cp="PRu64", s="PRu64", da="PRu64"\n", + cp, s, da); + + if (da < cp || da >= (cp + s)) + return OF_BAD_ADDR; + return da - cp; +} + +static int of_bus_default_translate(u32 *addr, u64 offset, int na) +{ + u64 a = of_read_number(addr, na); + memset(addr, 0, na * 4); + a += offset; + if (na > 1) + addr[na - 2] = a >> 32; + addr[na - 1] = a & 0xffffffffu; + + return 0; +} + +static unsigned int of_bus_default_get_flags(const u32 *addr) +{ + return IORESOURCE_MEM; +} + +#ifdef CONFIG_PCI +/* + * PCI bus specific translator + */ + +static int of_bus_pci_match(struct device_node *np) +{ + /* "vci" is for the /chaos bridge on 1st-gen PCI powermacs */ + return !strcmp(np->type, "pci") || !strcmp(np->type, "vci"); +} + +static void of_bus_pci_count_cells(struct device_node *np, + int *addrc, int *sizec) +{ + if (addrc) + *addrc = 3; + if (sizec) + *sizec = 2; +} + +static u64 of_bus_pci_map(u32 *addr, const u32 *range, int na, int ns, int pna) +{ + u64 cp, s, da; + + /* Check address type match */ + if ((addr[0] ^ range[0]) & 0x03000000) + return OF_BAD_ADDR; + + /* Read address values, skipping high cell */ + cp = of_read_number(range + 1, na - 1); + s = of_read_number(range + na + pna, ns); + da = of_read_number(addr + 1, na - 1); + + pr_debug("OF: PCI map, cp="PRu64", s="PRu64", da="PRu64"\n", cp, s, da); + + if (da < cp || da >= (cp + s)) + return OF_BAD_ADDR; + return da - cp; +} + +static int of_bus_pci_translate(u32 *addr, u64 offset, int na) +{ + return of_bus_default_translate(addr + 1, offset, na - 1); +} + +static unsigned int of_bus_pci_get_flags(const u32 *addr) +{ + unsigned int flags = 0; + u32 w = addr[0]; + + switch ((w >> 24) & 0x03) { + case 0x01: + flags |= IORESOURCE_IO; + break; + case 0x02: /* 32 bits */ + case 0x03: /* 64 bits */ + flags |= IORESOURCE_MEM; + break; + } + if (w & 0x40000000) + flags |= IORESOURCE_PREFETCH; + return flags; +} + +const u32 *of_get_pci_address(struct device_node *dev, int bar_no, u64 *size, + unsigned int *flags) +{ + const u32 *prop; + unsigned int psize; + struct device_node *parent; + struct of_bus *bus; + int onesize, i, na, ns; + + /* Get parent & match bus type */ + parent = of_get_parent(dev); + if (parent == NULL) + return NULL; + bus = of_match_bus(parent); + if (strcmp(bus->name, "pci")) { + of_node_put(parent); + return NULL; + } + bus->count_cells(dev, &na, &ns); + of_node_put(parent); + if (!OF_CHECK_COUNTS(na, ns)) + return NULL; + + /* Get "reg" or "assigned-addresses" property */ + prop = of_get_property(dev, bus->addresses, &psize); + if (prop == NULL) + return NULL; + psize /= 4; + + onesize = na + ns; + for (i = 0; psize >= onesize; psize -= onesize, prop += onesize, i++) + if ((prop[0] & 0xff) == ((bar_no * 4) + PCI_BASE_ADDRESS_0)) { + if (size) + *size = of_read_number(prop + na, ns); + if (flags) + *flags = bus->get_flags(prop); + return prop; + } + return NULL; +} +EXPORT_SYMBOL(of_get_pci_address); + +int of_pci_address_to_resource(struct device_node *dev, int bar, + struct resource *r) +{ + const u32 *addrp; + u64 size; + unsigned int flags; + + addrp = of_get_pci_address(dev, bar, &size, &flags); + if (addrp == NULL) + return -EINVAL; + return __of_address_to_resource(dev, addrp, size, flags, r); +} +EXPORT_SYMBOL_GPL(of_pci_address_to_resource); + +static u8 of_irq_pci_swizzle(u8 slot, u8 pin) +{ + return (((pin - 1) + slot) % 4) + 1; +} + +int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq) +{ + struct device_node *dn, *ppnode; + struct pci_dev *ppdev; + u32 lspec; + u32 laddr[3]; + u8 pin; + int rc; + + /* Check if we have a device node, if yes, fallback to standard OF + * parsing + */ + dn = pci_device_to_OF_node(pdev); + if (dn) + return of_irq_map_one(dn, 0, out_irq); + + /* Ok, we don't, time to have fun. Let's start by building up an + * interrupt spec. we assume #interrupt-cells is 1, which is standard + * for PCI. If you do different, then don't use that routine. + */ + rc = pci_read_config_byte(pdev, PCI_INTERRUPT_PIN, &pin); + if (rc != 0) + return rc; + /* No pin, exit */ + if (pin == 0) + return -ENODEV; + + /* Now we walk up the PCI tree */ + lspec = pin; + for (;;) { + /* Get the pci_dev of our parent */ + ppdev = pdev->bus->self; + + /* Ouch, it's a host bridge... */ + if (ppdev == NULL) { + struct pci_controller *host; + host = pci_bus_to_host(pdev->bus); + ppnode = host ? host->arch_data : NULL; + /* No node for host bridge ? give up */ + if (ppnode == NULL) + return -EINVAL; + } else + /* We found a P2P bridge, check if it has a node */ + ppnode = pci_device_to_OF_node(ppdev); + + /* Ok, we have found a parent with a device-node, hand over to + * the OF parsing code. + * We build a unit address from the linux device to be used for + * resolution. Note that we use the linux bus number which may + * not match your firmware bus numbering. + * Fortunately, in most cases, interrupt-map-mask doesn't + * include the bus number as part of the matching. + * You should still be careful about that though if you intend + * to rely on this function (you ship a firmware that doesn't + * create device nodes for all PCI devices). + */ + if (ppnode) + break; + + /* We can only get here if we hit a P2P bridge with no node, + * let's do standard swizzling and try again + */ + lspec = of_irq_pci_swizzle(PCI_SLOT(pdev->devfn), lspec); + pdev = ppdev; + } + + laddr[0] = (pdev->bus->number << 16) + | (pdev->devfn << 8); + laddr[1] = laddr[2] = 0; + return of_irq_map_raw(ppnode, &lspec, 1, laddr, out_irq); +} +EXPORT_SYMBOL_GPL(of_irq_map_pci); +#endif /* CONFIG_PCI */ + +/* + * ISA bus specific translator + */ + +static int of_bus_isa_match(struct device_node *np) +{ + return !strcmp(np->name, "isa"); +} + +static void of_bus_isa_count_cells(struct device_node *child, + int *addrc, int *sizec) +{ + if (addrc) + *addrc = 2; + if (sizec) + *sizec = 1; +} + +static u64 of_bus_isa_map(u32 *addr, const u32 *range, int na, int ns, int pna) +{ + u64 cp, s, da; + + /* Check address type match */ + if ((addr[0] ^ range[0]) & 0x00000001) + return OF_BAD_ADDR; + + /* Read address values, skipping high cell */ + cp = of_read_number(range + 1, na - 1); + s = of_read_number(range + na + pna, ns); + da = of_read_number(addr + 1, na - 1); + + pr_debug("OF: ISA map, cp="PRu64", s="PRu64", da="PRu64"\n", cp, s, da); + + if (da < cp || da >= (cp + s)) + return OF_BAD_ADDR; + return da - cp; +} + +static int of_bus_isa_translate(u32 *addr, u64 offset, int na) +{ + return of_bus_default_translate(addr + 1, offset, na - 1); +} + +static unsigned int of_bus_isa_get_flags(const u32 *addr) +{ + unsigned int flags = 0; + u32 w = addr[0]; + + if (w & 1) + flags |= IORESOURCE_IO; + else + flags |= IORESOURCE_MEM; + return flags; +} + +/* + * Array of bus specific translators + */ + +static struct of_bus of_busses[] = { +#ifdef CONFIG_PCI + /* PCI */ + { + .name = "pci", + .addresses = "assigned-addresses", + .match = of_bus_pci_match, + .count_cells = of_bus_pci_count_cells, + .map = of_bus_pci_map, + .translate = of_bus_pci_translate, + .get_flags = of_bus_pci_get_flags, + }, +#endif /* CONFIG_PCI */ + /* ISA */ + { + .name = "isa", + .addresses = "reg", + .match = of_bus_isa_match, + .count_cells = of_bus_isa_count_cells, + .map = of_bus_isa_map, + .translate = of_bus_isa_translate, + .get_flags = of_bus_isa_get_flags, + }, + /* Default */ + { + .name = "default", + .addresses = "reg", + .match = NULL, + .count_cells = of_bus_default_count_cells, + .map = of_bus_default_map, + .translate = of_bus_default_translate, + .get_flags = of_bus_default_get_flags, + }, +}; + +static struct of_bus *of_match_bus(struct device_node *np) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(of_busses); i++) + if (!of_busses[i].match || of_busses[i].match(np)) + return &of_busses[i]; + BUG(); + return NULL; +} + +static int of_translate_one(struct device_node *parent, struct of_bus *bus, + struct of_bus *pbus, u32 *addr, + int na, int ns, int pna) +{ + const u32 *ranges; + unsigned int rlen; + int rone; + u64 offset = OF_BAD_ADDR; + + /* Normally, an absence of a "ranges" property means we are + * crossing a non-translatable boundary, and thus the addresses + * below the current not cannot be converted to CPU physical ones. + * Unfortunately, while this is very clear in the spec, it's not + * what Apple understood, and they do have things like /uni-n or + * /ht nodes with no "ranges" property and a lot of perfectly + * useable mapped devices below them. Thus we treat the absence of + * "ranges" as equivalent to an empty "ranges" property which means + * a 1:1 translation at that level. It's up to the caller not to try + * to translate addresses that aren't supposed to be translated in + * the first place. --BenH. + */ + ranges = of_get_property(parent, "ranges", (int *) &rlen); + if (ranges == NULL || rlen == 0) { + offset = of_read_number(addr, na); + memset(addr, 0, pna * 4); + pr_debug("OF: no ranges, 1:1 translation\n"); + goto finish; + } + + pr_debug("OF: walking ranges...\n"); + + /* Now walk through the ranges */ + rlen /= 4; + rone = na + pna + ns; + for (; rlen >= rone; rlen -= rone, ranges += rone) { + offset = bus->map(addr, ranges, na, ns, pna); + if (offset != OF_BAD_ADDR) + break; + } + if (offset == OF_BAD_ADDR) { + pr_debug("OF: not found !\n"); + return 1; + } + memcpy(addr, ranges + na, 4 * pna); + + finish: + of_dump_addr("OF: parent translation for:", addr, pna); + pr_debug("OF: with offset: "PRu64"\n", offset); + + /* Translate it into parent bus space */ + return pbus->translate(addr, offset, pna); +} + +/* + * Translate an address from the device-tree into a CPU physical address, + * this walks up the tree and applies the various bus mappings on the + * way. + * + * Note: We consider that crossing any level with #size-cells == 0 to mean + * that translation is impossible (that is we are not dealing with a value + * that can be mapped to a cpu physical address). This is not really specified + * that way, but this is traditionally the way IBM at least do things + */ +u64 of_translate_address(struct device_node *dev, const u32 *in_addr) +{ + struct device_node *parent = NULL; + struct of_bus *bus, *pbus; + u32 addr[OF_MAX_ADDR_CELLS]; + int na, ns, pna, pns; + u64 result = OF_BAD_ADDR; + + pr_debug("OF: ** translation for device %s **\n", dev->full_name); + + /* Increase refcount at current level */ + of_node_get(dev); + + /* Get parent & match bus type */ + parent = of_get_parent(dev); + if (parent == NULL) + goto bail; + bus = of_match_bus(parent); + + /* Cound address cells & copy address locally */ + bus->count_cells(dev, &na, &ns); + if (!OF_CHECK_COUNTS(na, ns)) { + printk(KERN_ERR "prom_parse: Bad cell count for %s\n", + dev->full_name); + goto bail; + } + memcpy(addr, in_addr, na * 4); + + pr_debug("OF: bus is %s (na=%d, ns=%d) on %s\n", + bus->name, na, ns, parent->full_name); + of_dump_addr("OF: translating address:", addr, na); + + /* Translate */ + for (;;) { + /* Switch to parent bus */ + of_node_put(dev); + dev = parent; + parent = of_get_parent(dev); + + /* If root, we have finished */ + if (parent == NULL) { + pr_debug("OF: reached root node\n"); + result = of_read_number(addr, na); + break; + } + + /* Get new parent bus and counts */ + pbus = of_match_bus(parent); + pbus->count_cells(dev, &pna, &pns); + if (!OF_CHECK_COUNTS(pna, pns)) { + printk(KERN_ERR "prom_parse: Bad cell count for %s\n", + dev->full_name); + break; + } + + pr_debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n", + pbus->name, pna, pns, parent->full_name); + + /* Apply bus translation */ + if (of_translate_one(dev, bus, pbus, addr, na, ns, pna)) + break; + + /* Complete the move up one level */ + na = pna; + ns = pns; + bus = pbus; + + of_dump_addr("OF: one level translation:", addr, na); + } + bail: + of_node_put(parent); + of_node_put(dev); + + return result; +} +EXPORT_SYMBOL(of_translate_address); + +const u32 *of_get_address(struct device_node *dev, int index, u64 *size, + unsigned int *flags) +{ + const u32 *prop; + unsigned int psize; + struct device_node *parent; + struct of_bus *bus; + int onesize, i, na, ns; + + /* Get parent & match bus type */ + parent = of_get_parent(dev); + if (parent == NULL) + return NULL; + bus = of_match_bus(parent); + bus->count_cells(dev, &na, &ns); + of_node_put(parent); + if (!OF_CHECK_COUNTS(na, ns)) + return NULL; + + /* Get "reg" or "assigned-addresses" property */ + prop = of_get_property(dev, bus->addresses, (int *) &psize); + if (prop == NULL) + return NULL; + psize /= 4; + + onesize = na + ns; + for (i = 0; psize >= onesize; psize -= onesize, prop += onesize, i++) + if (i == index) { + if (size) + *size = of_read_number(prop + na, ns); + if (flags) + *flags = bus->get_flags(prop); + return prop; + } + return NULL; +} +EXPORT_SYMBOL(of_get_address); + +static int __of_address_to_resource(struct device_node *dev, const u32 *addrp, + u64 size, unsigned int flags, + struct resource *r) +{ + u64 taddr; + + if ((flags & (IORESOURCE_IO | IORESOURCE_MEM)) == 0) + return -EINVAL; + taddr = of_translate_address(dev, addrp); + if (taddr == OF_BAD_ADDR) + return -EINVAL; + memset(r, 0, sizeof(struct resource)); + if (flags & IORESOURCE_IO) { + unsigned long port; + port = -1; /* pci_address_to_pio(taddr); */ + if (port == (unsigned long)-1) + return -EINVAL; + r->start = port; + r->end = port + size - 1; + } else { + r->start = taddr; + r->end = taddr + size - 1; + } + r->flags = flags; + r->name = dev->name; + return 0; +} + +int of_address_to_resource(struct device_node *dev, int index, + struct resource *r) +{ + const u32 *addrp; + u64 size; + unsigned int flags; + + addrp = of_get_address(dev, index, &size, &flags); + if (addrp == NULL) + return -EINVAL; + return __of_address_to_resource(dev, addrp, size, flags, r); +} +EXPORT_SYMBOL_GPL(of_address_to_resource); + +void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop, + unsigned long *busno, unsigned long *phys, unsigned long *size) +{ + const u32 *dma_window; + u32 cells; + const unsigned char *prop; + + dma_window = dma_window_prop; + + /* busno is always one cell */ + *busno = *(dma_window++); + + prop = of_get_property(dn, "ibm,#dma-address-cells", NULL); + if (!prop) + prop = of_get_property(dn, "#address-cells", NULL); + + cells = prop ? *(u32 *)prop : of_n_addr_cells(dn); + *phys = of_read_number(dma_window, cells); + + dma_window += cells; + + prop = of_get_property(dn, "ibm,#dma-size-cells", NULL); + cells = prop ? *(u32 *)prop : of_n_size_cells(dn); + *size = of_read_number(dma_window, cells); +} + +/* + * Interrupt remapper + */ + +static unsigned int of_irq_workarounds; +static struct device_node *of_irq_dflt_pic; + +static struct device_node *of_irq_find_parent(struct device_node *child) +{ + struct device_node *p; + const phandle *parp; + + if (!of_node_get(child)) + return NULL; + + do { + parp = of_get_property(child, "interrupt-parent", NULL); + if (parp == NULL) + p = of_get_parent(child); + else { + if (of_irq_workarounds & OF_IMAP_NO_PHANDLE) + p = of_node_get(of_irq_dflt_pic); + else + p = of_find_node_by_phandle(*parp); + } + of_node_put(child); + child = p; + } while (p && of_get_property(p, "#interrupt-cells", NULL) == NULL); + + return p; +} + +/* This doesn't need to be called if you don't have any special workaround + * flags to pass + */ +void of_irq_map_init(unsigned int flags) +{ + of_irq_workarounds = flags; + + /* OldWorld, don't bother looking at other things */ + if (flags & OF_IMAP_OLDWORLD_MAC) + return; + + /* If we don't have phandles, let's try to locate a default interrupt + * controller (happens when booting with BootX). We do a first match + * here, hopefully, that only ever happens on machines with one + * controller. + */ + if (flags & OF_IMAP_NO_PHANDLE) { + struct device_node *np; + + for (np = NULL; (np = of_find_all_nodes(np)) != NULL;) { + if (of_get_property(np, "interrupt-controller", NULL) + == NULL) + continue; + /* Skip /chosen/interrupt-controller */ + if (strcmp(np->name, "chosen") == 0) + continue; + /* It seems like at least one person on this planet + * wants to use BootX on a machine with an AppleKiwi + * controller which happens to pretend to be an + * interrupt controller too. + */ + if (strcmp(np->name, "AppleKiwi") == 0) + continue; + /* I think we found one ! */ + of_irq_dflt_pic = np; + break; + } + } + +} + +int of_irq_map_raw(struct device_node *parent, const u32 *intspec, u32 ointsize, + const u32 *addr, struct of_irq *out_irq) +{ + struct device_node *ipar, *tnode, *old = NULL, *newpar = NULL; + const u32 *tmp, *imap, *imask; + u32 intsize = 1, addrsize, newintsize = 0, newaddrsize = 0; + int imaplen, match, i; + + pr_debug("of_irq_map_raw: par=%s,intspec=[0x%08x 0x%08x...]," + "ointsize=%d\n", + parent->full_name, intspec[0], intspec[1], ointsize); + + ipar = of_node_get(parent); + + /* First get the #interrupt-cells property of the current cursor + * that tells us how to interpret the passed-in intspec. If there + * is none, we are nice and just walk up the tree + */ + do { + tmp = of_get_property(ipar, "#interrupt-cells", NULL); + if (tmp != NULL) { + intsize = *tmp; + break; + } + tnode = ipar; + ipar = of_irq_find_parent(ipar); + of_node_put(tnode); + } while (ipar); + if (ipar == NULL) { + pr_debug(" -> no parent found !\n"); + goto fail; + } + + pr_debug("of_irq_map_raw: ipar=%s, size=%d\n", + ipar->full_name, intsize); + + if (ointsize != intsize) + return -EINVAL; + + /* Look for this #address-cells. We have to implement the old linux + * trick of looking for the parent here as some device-trees rely on it + */ + old = of_node_get(ipar); + do { + tmp = of_get_property(old, "#address-cells", NULL); + tnode = of_get_parent(old); + of_node_put(old); + old = tnode; + } while (old && tmp == NULL); + of_node_put(old); + old = NULL; + addrsize = (tmp == NULL) ? 2 : *tmp; + + pr_debug(" -> addrsize=%d\n", addrsize); + + /* Now start the actual "proper" walk of the interrupt tree */ + while (ipar != NULL) { + /* Now check if cursor is an interrupt-controller and if it is + * then we are done + */ + if (of_get_property(ipar, "interrupt-controller", NULL) != + NULL) { + pr_debug(" -> got it !\n"); + memcpy(out_irq->specifier, intspec, + intsize * sizeof(u32)); + out_irq->size = intsize; + out_irq->controller = ipar; + of_node_put(old); + return 0; + } + + /* Now look for an interrupt-map */ + imap = of_get_property(ipar, "interrupt-map", &imaplen); + /* No interrupt map, check for an interrupt parent */ + if (imap == NULL) { + pr_debug(" -> no map, getting parent\n"); + newpar = of_irq_find_parent(ipar); + goto skiplevel; + } + imaplen /= sizeof(u32); + + /* Look for a mask */ + imask = of_get_property(ipar, "interrupt-map-mask", NULL); + + /* If we were passed no "reg" property and we attempt to parse + * an interrupt-map, then #address-cells must be 0. + * Fail if it's not. + */ + if (addr == NULL && addrsize != 0) { + pr_debug(" -> no reg passed in when needed !\n"); + goto fail; + } + + /* Parse interrupt-map */ + match = 0; + while (imaplen > (addrsize + intsize + 1) && !match) { + /* Compare specifiers */ + match = 1; + for (i = 0; i < addrsize && match; ++i) { + u32 mask = imask ? imask[i] : 0xffffffffu; + match = ((addr[i] ^ imap[i]) & mask) == 0; + } + for (; i < (addrsize + intsize) && match; ++i) { + u32 mask = imask ? imask[i] : 0xffffffffu; + match = + ((intspec[i-addrsize] ^ imap[i]) + & mask) == 0; + } + imap += addrsize + intsize; + imaplen -= addrsize + intsize; + + pr_debug(" -> match=%d (imaplen=%d)\n", match, imaplen); + + /* Get the interrupt parent */ + if (of_irq_workarounds & OF_IMAP_NO_PHANDLE) + newpar = of_node_get(of_irq_dflt_pic); + else + newpar = + of_find_node_by_phandle((phandle)*imap); + imap++; + --imaplen; + + /* Check if not found */ + if (newpar == NULL) { + pr_debug(" -> imap parent not found !\n"); + goto fail; + } + + /* Get #interrupt-cells and #address-cells of new + * parent + */ + tmp = of_get_property(newpar, "#interrupt-cells", NULL); + if (tmp == NULL) { + pr_debug(" -> parent lacks " + "#interrupt-cells!\n"); + goto fail; + } + newintsize = *tmp; + tmp = of_get_property(newpar, "#address-cells", NULL); + newaddrsize = (tmp == NULL) ? 0 : *tmp; + + pr_debug(" -> newintsize=%d, newaddrsize=%d\n", + newintsize, newaddrsize); + + /* Check for malformed properties */ + if (imaplen < (newaddrsize + newintsize)) + goto fail; + + imap += newaddrsize + newintsize; + imaplen -= newaddrsize + newintsize; + + pr_debug(" -> imaplen=%d\n", imaplen); + } + if (!match) + goto fail; + + of_node_put(old); + old = of_node_get(newpar); + addrsize = newaddrsize; + intsize = newintsize; + intspec = imap - intsize; + addr = intspec - addrsize; + +skiplevel: + /* Iterate again with new parent */ + pr_debug(" -> new parent: %s\n", + newpar ? newpar->full_name : "<>"); + of_node_put(ipar); + ipar = newpar; + newpar = NULL; + } +fail: + of_node_put(ipar); + of_node_put(old); + of_node_put(newpar); + + return -EINVAL; +} +EXPORT_SYMBOL_GPL(of_irq_map_raw); + +int of_irq_map_one(struct device_node *device, + int index, struct of_irq *out_irq) +{ + struct device_node *p; + const u32 *intspec, *tmp, *addr; + u32 intsize, intlen; + int res; + + pr_debug("of_irq_map_one: dev=%s, index=%d\n", + device->full_name, index); + + /* Get the interrupts property */ + intspec = of_get_property(device, "interrupts", (int *) &intlen); + if (intspec == NULL) + return -EINVAL; + intlen /= sizeof(u32); + + pr_debug(" intspec=%d intlen=%d\n", *intspec, intlen); + + /* Get the reg property (if any) */ + addr = of_get_property(device, "reg", NULL); + + /* Look for the interrupt parent. */ + p = of_irq_find_parent(device); + if (p == NULL) + return -EINVAL; + + /* Get size of interrupt specifier */ + tmp = of_get_property(p, "#interrupt-cells", NULL); + if (tmp == NULL) { + of_node_put(p); + return -EINVAL; + } + intsize = *tmp; + + pr_debug(" intsize=%d intlen=%d\n", intsize, intlen); + + /* Check index */ + if ((index + 1) * intsize > intlen) + return -EINVAL; + + /* Get new specifier and map it */ + res = of_irq_map_raw(p, intspec + index * intsize, intsize, + addr, out_irq); + of_node_put(p); + return res; +} +EXPORT_SYMBOL_GPL(of_irq_map_one); + +/** + * Search the device tree for the best MAC address to use. 'mac-address' is + * checked first, because that is supposed to contain to "most recent" MAC + * address. If that isn't set, then 'local-mac-address' is checked next, + * because that is the default address. If that isn't set, then the obsolete + * 'address' is checked, just in case we're using an old device tree. + * + * Note that the 'address' property is supposed to contain a virtual address of + * the register set, but some DTS files have redefined that property to be the + * MAC address. + * + * All-zero MAC addresses are rejected, because those could be properties that + * exist in the device tree, but were not set by U-Boot. For example, the + * DTS could define 'mac-address' and 'local-mac-address', with zero MAC + * addresses. Some older U-Boots only initialized 'local-mac-address'. In + * this case, the real MAC is in 'local-mac-address', and 'mac-address' exists + * but is all zeros. +*/ +const void *of_get_mac_address(struct device_node *np) +{ + struct property *pp; + + pp = of_find_property(np, "mac-address", NULL); + if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value)) + return pp->value; + + pp = of_find_property(np, "local-mac-address", NULL); + if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value)) + return pp->value; + + pp = of_find_property(np, "address", NULL); + if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value)) + return pp->value; + + return NULL; +} +EXPORT_SYMBOL(of_get_mac_address); + +int of_irq_to_resource(struct device_node *dev, int index, struct resource *r) +{ + struct of_irq out_irq; + int irq; + int res; + + res = of_irq_map_one(dev, index, &out_irq); + + /* Get irq for the device */ + if (res) { + pr_debug("IRQ not found... code = %d", res); + return NO_IRQ; + } + /* Assuming single interrupt controller... */ + irq = out_irq.specifier[0]; + + pr_debug("IRQ found = %d", irq); + + /* Only dereference the resource if both the + * resource and the irq are valid. */ + if (r && irq != NO_IRQ) { + r->start = r->end = irq; + r->flags = IORESOURCE_IRQ; + } + + return irq; +} +EXPORT_SYMBOL_GPL(of_irq_to_resource); + +void __iomem *of_iomap(struct device_node *np, int index) +{ + struct resource res; + + if (of_address_to_resource(np, index, &res)) + return NULL; + + return ioremap(res.start, 1 + res.end - res.start); +} +EXPORT_SYMBOL(of_iomap); diff --git a/arch/microblaze/kernel/ptrace.c b/arch/microblaze/kernel/ptrace.c new file mode 100644 index 000000000000..b86aa623e36d --- /dev/null +++ b/arch/microblaze/kernel/ptrace.c @@ -0,0 +1,181 @@ +/* + * `ptrace' system call + * + * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2007-2009 PetaLogix + * Copyright (C) 2004-2007 John Williams <john.williams@petalogix.com> + * + * derived from arch/v850/kernel/ptrace.c + * + * Copyright (C) 2002,03 NEC Electronics Corporation + * Copyright (C) 2002,03 Miles Bader <miles@gnu.org> + * + * Derived from arch/mips/kernel/ptrace.c: + * + * Copyright (C) 1992 Ross Biro + * Copyright (C) Linus Torvalds + * Copyright (C) 1994, 95, 96, 97, 98, 2000 Ralf Baechle + * Copyright (C) 1996 David S. Miller + * Kevin D. Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com + * Copyright (C) 1999 MIPS Technologies, Inc. + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file COPYING in the main directory of this + * archive for more details. + */ + +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/sched.h> +#include <linux/smp_lock.h> +#include <linux/ptrace.h> +#include <linux/signal.h> + +#include <linux/errno.h> +#include <asm/processor.h> +#include <linux/uaccess.h> +#include <asm/asm-offsets.h> + +/* Returns the address where the register at REG_OFFS in P is stashed away. */ +static microblaze_reg_t *reg_save_addr(unsigned reg_offs, + struct task_struct *t) +{ + struct pt_regs *regs; + + /* + * Three basic cases: + * + * (1) A register normally saved before calling the scheduler, is + * available in the kernel entry pt_regs structure at the top + * of the kernel stack. The kernel trap/irq exit path takes + * care to save/restore almost all registers for ptrace'd + * processes. + * + * (2) A call-clobbered register, where the process P entered the + * kernel via [syscall] trap, is not stored anywhere; that's + * OK, because such registers are not expected to be preserved + * when the trap returns anyway (so we don't actually bother to + * test for this case). + * + * (3) A few registers not used at all by the kernel, and so + * normally never saved except by context-switches, are in the + * context switch state. + */ + + /* Register saved during kernel entry (or not available). */ + regs = task_pt_regs(t); + + return (microblaze_reg_t *)((char *)regs + reg_offs); +} + +long arch_ptrace(struct task_struct *child, long request, long addr, long data) +{ + int rval; + unsigned long val = 0; + unsigned long copied; + + switch (request) { + case PTRACE_PEEKTEXT: /* read word at location addr. */ + case PTRACE_PEEKDATA: + pr_debug("PEEKTEXT/PEEKDATA at %08lX\n", addr); + copied = access_process_vm(child, addr, &val, sizeof(val), 0); + rval = -EIO; + if (copied != sizeof(val)) + break; + rval = put_user(val, (unsigned long *)data); + break; + + case PTRACE_POKETEXT: /* write the word at location addr. */ + case PTRACE_POKEDATA: + pr_debug("POKETEXT/POKEDATA to %08lX\n", addr); + rval = 0; + if (access_process_vm(child, addr, &data, sizeof(data), 1) + == sizeof(data)) + break; + rval = -EIO; + break; + + /* Read/write the word at location ADDR in the registers. */ + case PTRACE_PEEKUSR: + case PTRACE_POKEUSR: + pr_debug("PEEKUSR/POKEUSR : 0x%08lx\n", addr); + rval = 0; + if (addr >= PT_SIZE && request == PTRACE_PEEKUSR) { + /* + * Special requests that don't actually correspond + * to offsets in struct pt_regs. + */ + if (addr == PT_TEXT_ADDR) { + val = child->mm->start_code; + } else if (addr == PT_DATA_ADDR) { + val = child->mm->start_data; + } else if (addr == PT_TEXT_LEN) { + val = child->mm->end_code + - child->mm->start_code; + } else { + rval = -EIO; + } + } else if (addr >= 0 && addr < PT_SIZE && (addr & 0x3) == 0) { + microblaze_reg_t *reg_addr = reg_save_addr(addr, child); + if (request == PTRACE_PEEKUSR) + val = *reg_addr; + else + *reg_addr = data; + } else + rval = -EIO; + + if (rval == 0 && request == PTRACE_PEEKUSR) + rval = put_user(val, (unsigned long *)data); + break; + /* Continue and stop at next (return from) syscall */ + case PTRACE_SYSCALL: + pr_debug("PTRACE_SYSCALL\n"); + case PTRACE_SINGLESTEP: + pr_debug("PTRACE_SINGLESTEP\n"); + /* Restart after a signal. */ + case PTRACE_CONT: + pr_debug("PTRACE_CONT\n"); + rval = -EIO; + if (!valid_signal(data)) + break; + + if (request == PTRACE_SYSCALL) + set_tsk_thread_flag(child, TIF_SYSCALL_TRACE); + else + clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE); + + child->exit_code = data; + pr_debug("wakeup_process\n"); + wake_up_process(child); + rval = 0; + break; + + /* + * make the child exit. Best I can do is send it a sigkill. + * perhaps it should be put in the status that it wants to + * exit. + */ + case PTRACE_KILL: + pr_debug("PTRACE_KILL\n"); + rval = 0; + if (child->exit_state == EXIT_ZOMBIE) /* already dead */ + break; + child->exit_code = SIGKILL; + wake_up_process(child); + break; + + case PTRACE_DETACH: /* detach a process that was attached. */ + pr_debug("PTRACE_DETACH\n"); + rval = ptrace_detach(child, data); + break; + default: + /* rval = ptrace_request(child, request, addr, data); noMMU */ + rval = -EIO; + } + return rval; +} + +void ptrace_disable(struct task_struct *child) +{ + /* nothing to do */ +} diff --git a/arch/microblaze/kernel/selfmod.c b/arch/microblaze/kernel/selfmod.c new file mode 100644 index 000000000000..89508bdc9f3c --- /dev/null +++ b/arch/microblaze/kernel/selfmod.c @@ -0,0 +1,81 @@ +/* + * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2009 PetaLogix + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include <linux/interrupt.h> +#include <asm/selfmod.h> + +#undef DEBUG + +#if __GNUC__ > 3 +#error GCC 4 unsupported SELFMOD. Please disable SELFMOD from menuconfig. +#endif + +#define OPCODE_IMM 0xB0000000 +#define OPCODE_LWI 0xE8000000 +#define OPCODE_LWI_MASK 0xEC000000 +#define OPCODE_RTSD 0xB60F0008 /* return from func: rtsd r15, 8 */ +#define OPCODE_ADDIK 0x30000000 +#define OPCODE_ADDIK_MASK 0xFC000000 + +#define IMM_BASE (OPCODE_IMM | (BARRIER_BASE_ADDR >> 16)) +#define LWI_BASE (OPCODE_LWI | (BARRIER_BASE_ADDR & 0x0000ff00)) +#define LWI_BASE_MASK (OPCODE_LWI_MASK | (BARRIER_BASE_ADDR & 0x0000ff00)) +#define ADDIK_BASE (OPCODE_ADDIK | (BARRIER_BASE_ADDR & 0x0000ff00)) +#define ADDIK_BASE_MASK (OPCODE_ADDIK_MASK | (BARRIER_BASE_ADDR & 0x0000ff00)) + +#define MODIFY_INSTR { \ + pr_debug("%s: curr instr, (%d):0x%x, next(%d):0x%x\n", \ + __func__, i, addr[i], i + 1, addr[i + 1]); \ + addr[i] = OPCODE_IMM + (base >> 16); \ + /* keep instruction opcode and add only last 16bits */ \ + addr[i + 1] = (addr[i + 1] & 0xffff00ff) + (base & 0xffff); \ + __invalidate_icache(addr[i]); \ + __invalidate_icache(addr[i + 1]); \ + pr_debug("%s: hack instr, (%d):0x%x, next(%d):0x%x\n", \ + __func__, i, addr[i], i + 1, addr[i + 1]); } + +/* NOTE + * self-modified part of code for improvement of interrupt controller + * save instruction in interrupt rutine + */ +void selfmod_function(const int *arr_fce, const unsigned int base) +{ + unsigned int flags, i, j, *addr = NULL; + + local_irq_save(flags); + __disable_icache(); + + /* zero terminated array */ + for (j = 0; arr_fce[j] != 0; j++) { + /* get start address of function */ + addr = (unsigned int *) arr_fce[j]; + pr_debug("%s: func(%d) at 0x%x\n", + __func__, j, (unsigned int) addr); + for (i = 0; ; i++) { + pr_debug("%s: instruction code at %d: 0x%x\n", + __func__, i, addr[i]); + if (addr[i] == IMM_BASE) { + /* detecting of lwi (0xE8) or swi (0xF8) instr + * I can detect both opcode with one mask */ + if ((addr[i + 1] & LWI_BASE_MASK) == LWI_BASE) { + MODIFY_INSTR; + } else /* detection addik for ack */ + if ((addr[i + 1] & ADDIK_BASE_MASK) == + ADDIK_BASE) { + MODIFY_INSTR; + } + } else if (addr[i] == OPCODE_RTSD) { + /* return from function means end of function */ + pr_debug("%s: end of array %d\n", __func__, i); + break; + } + } + } + local_irq_restore(flags); +} /* end of self-modified code */ diff --git a/arch/microblaze/kernel/setup.c b/arch/microblaze/kernel/setup.c new file mode 100644 index 000000000000..eb6b41758e23 --- /dev/null +++ b/arch/microblaze/kernel/setup.c @@ -0,0 +1,199 @@ +/* + * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2007-2009 PetaLogix + * Copyright (C) 2006 Atmark Techno, Inc. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include <linux/init.h> +#include <linux/string.h> +#include <linux/seq_file.h> +#include <linux/cpu.h> +#include <linux/initrd.h> +#include <linux/console.h> +#include <linux/debugfs.h> + +#include <asm/setup.h> +#include <asm/sections.h> +#include <asm/page.h> +#include <linux/io.h> +#include <linux/bug.h> +#include <linux/param.h> +#include <linux/cache.h> +#include <asm/cacheflush.h> +#include <asm/entry.h> +#include <asm/cpuinfo.h> + +#include <asm/system.h> +#include <asm/prom.h> +#include <asm/pgtable.h> + +DEFINE_PER_CPU(unsigned int, KSP); /* Saved kernel stack pointer */ +DEFINE_PER_CPU(unsigned int, KM); /* Kernel/user mode */ +DEFINE_PER_CPU(unsigned int, ENTRY_SP); /* Saved SP on kernel entry */ +DEFINE_PER_CPU(unsigned int, R11_SAVE); /* Temp variable for entry */ +DEFINE_PER_CPU(unsigned int, CURRENT_SAVE); /* Saved current pointer */ + +unsigned int boot_cpuid; +char cmd_line[COMMAND_LINE_SIZE]; + +void __init setup_arch(char **cmdline_p) +{ +#ifdef CONFIG_CMDLINE_FORCE + strlcpy(cmd_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE); + strlcpy(boot_command_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE); +#endif + *cmdline_p = cmd_line; + + console_verbose(); + + unflatten_device_tree(); + + /* NOTE I think that this function is not necessary to call */ + /* irq_early_init(); */ + setup_cpuinfo(); + + __invalidate_icache_all(); + __enable_icache(); + + __invalidate_dcache_all(); + __enable_dcache(); + + panic_timeout = 120; + + setup_memory(); + +#if defined(CONFIG_SELFMOD_INTC) || defined(CONFIG_SELFMOD_TIMER) + printk(KERN_NOTICE "Self modified code enable\n"); +#endif + +#ifdef CONFIG_VT +#if defined(CONFIG_XILINX_CONSOLE) + conswitchp = &xil_con; +#elif defined(CONFIG_DUMMY_CONSOLE) + conswitchp = &dummy_con; +#endif +#endif +} + +#ifdef CONFIG_MTD_UCLINUX +/* Handle both romfs and cramfs types, without generating unnecessary + code (ie no point checking for CRAMFS if it's not even enabled) */ +inline unsigned get_romfs_len(unsigned *addr) +{ +#ifdef CONFIG_ROMFS_FS + if (memcmp(&addr[0], "-rom1fs-", 8) == 0) /* romfs */ + return be32_to_cpu(addr[2]); +#endif + +#ifdef CONFIG_CRAMFS + if (addr[0] == le32_to_cpu(0x28cd3d45)) /* cramfs */ + return le32_to_cpu(addr[1]); +#endif + return 0; +} +#endif /* CONFIG_MTD_UCLINUX_EBSS */ + +void __init machine_early_init(const char *cmdline, unsigned int ram, + unsigned int fdt) +{ + unsigned long *src, *dst = (unsigned long *)0x0; + +/* clearing bss section */ + memset(__bss_start, 0, __bss_stop-__bss_start); + memset(_ssbss, 0, _esbss-_ssbss); + + /* + * Copy command line passed from bootloader, or use default + * if none provided, or forced + */ +#ifndef CONFIG_CMDLINE_BOOL + if (cmdline && cmdline[0] != '\0') + strlcpy(cmd_line, cmdline, COMMAND_LINE_SIZE); +#endif + +/* initialize device tree for usage in early_printk */ + early_init_devtree((void *)_fdt_start); + +#ifdef CONFIG_EARLY_PRINTK + setup_early_printk(NULL); +#endif + + early_printk("Ramdisk addr 0x%08x, FDT 0x%08x\n", ram, fdt); + printk(KERN_NOTICE "Found FDT at 0x%08x\n", fdt); + +#ifdef CONFIG_MTD_UCLINUX + { + int size; + unsigned int romfs_base; + romfs_base = (ram ? ram : (unsigned int)&__init_end); + /* if CONFIG_MTD_UCLINUX_EBSS is defined, assume ROMFS is at the + * end of kernel, which is ROMFS_LOCATION defined above. */ + size = PAGE_ALIGN(get_romfs_len((unsigned *)romfs_base)); + early_printk("Found romfs @ 0x%08x (0x%08x)\n", + romfs_base, size); + early_printk("#### klimit %p ####\n", klimit); + BUG_ON(size < 0); /* What else can we do? */ + + /* Use memmove to handle likely case of memory overlap */ + early_printk("Moving 0x%08x bytes from 0x%08x to 0x%08x\n", + size, romfs_base, (unsigned)&_ebss); + memmove(&_ebss, (int *)romfs_base, size); + + /* update klimit */ + klimit += PAGE_ALIGN(size); + early_printk("New klimit: 0x%08x\n", (unsigned)klimit); + } +#endif + + for (src = __ivt_start; src < __ivt_end; src++, dst++) + *dst = *src; + + /* Initialize global data */ + per_cpu(KM, 0) = 0x1; /* We start in kernel mode */ + per_cpu(CURRENT_SAVE, 0) = (unsigned long)current; +} + +#ifdef CONFIG_DEBUG_FS +struct dentry *of_debugfs_root; + +static int microblaze_debugfs_init(void) +{ + of_debugfs_root = debugfs_create_dir("microblaze", NULL); + + return of_debugfs_root == NULL; +} +arch_initcall(microblaze_debugfs_init); +#endif + +void machine_restart(char *cmd) +{ + printk(KERN_NOTICE "Machine restart...\n"); + dump_stack(); + while (1) + ; +} + +void machine_shutdown(void) +{ + printk(KERN_NOTICE "Machine shutdown...\n"); + while (1) + ; +} + +void machine_halt(void) +{ + printk(KERN_NOTICE "Machine halt...\n"); + while (1) + ; +} + +void machine_power_off(void) +{ + printk(KERN_NOTICE "Machine power off...\n"); + while (1) + ; +} diff --git a/arch/microblaze/kernel/signal.c b/arch/microblaze/kernel/signal.c new file mode 100644 index 000000000000..40d36931e363 --- /dev/null +++ b/arch/microblaze/kernel/signal.c @@ -0,0 +1,543 @@ +/* + * Signal handling + * + * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2008-2009 PetaLogix + * Copyright (C) 2003,2004 John Williams <jwilliams@itee.uq.edu.au> + * Copyright (C) 2001 NEC Corporation + * Copyright (C) 2001 Miles Bader <miles@gnu.org> + * Copyright (C) 1999,2000 Niibe Yutaka & Kaz Kojima + * Copyright (C) 1991,1992 Linus Torvalds + * + * 1997-11-28 Modified for POSIX.1b signals by Richard Henderson + * + * This file was was derived from the sh version, arch/sh/kernel/signal.c + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file COPYING in the main directory of this + * archive for more details. + */ + +#include <linux/sched.h> +#include <linux/mm.h> +#include <linux/smp.h> +#include <linux/smp_lock.h> +#include <linux/kernel.h> +#include <linux/signal.h> +#include <linux/errno.h> +#include <linux/wait.h> +#include <linux/ptrace.h> +#include <linux/unistd.h> +#include <linux/stddef.h> +#include <linux/personality.h> +#include <linux/percpu.h> +#include <linux/linkage.h> +#include <asm/entry.h> +#include <asm/ucontext.h> +#include <linux/uaccess.h> +#include <asm/pgtable.h> +#include <asm/pgalloc.h> +#include <linux/syscalls.h> +#include <asm/cacheflush.h> +#include <asm/syscalls.h> + +#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) + +asmlinkage int do_signal(struct pt_regs *regs, sigset_t *oldset, int in_sycall); + +/* + * Atomically swap in the new signal mask, and wait for a signal. + */ +asmlinkage int +sys_sigsuspend(old_sigset_t mask, struct pt_regs *regs) +{ + sigset_t saveset; + + mask &= _BLOCKABLE; + spin_lock_irq(¤t->sighand->siglock); + saveset = current->blocked; + siginitset(¤t->blocked, mask); + recalc_sigpending(); + spin_unlock_irq(¤t->sighand->siglock); + + regs->r3 = -EINTR; + while (1) { + current->state = TASK_INTERRUPTIBLE; + schedule(); + if (do_signal(regs, &saveset, 1)) + return -EINTR; + } +} + +asmlinkage int +sys_rt_sigsuspend(sigset_t __user *unewset, size_t sigsetsize, + struct pt_regs *regs) +{ + sigset_t saveset, newset; + + /* XXX: Don't preclude handling different sized sigset_t's. */ + if (sigsetsize != sizeof(sigset_t)) + return -EINVAL; + + if (copy_from_user(&newset, unewset, sizeof(newset))) + return -EFAULT; + sigdelsetmask(&newset, ~_BLOCKABLE); + spin_lock_irq(¤t->sighand->siglock); + saveset = current->blocked; + current->blocked = newset; + recalc_sigpending(); + spin_unlock_irq(¤t->sighand->siglock); + + regs->r3 = -EINTR; + while (1) { + current->state = TASK_INTERRUPTIBLE; + schedule(); + if (do_signal(regs, &saveset, 1)) + return -EINTR; + } +} + +asmlinkage int +sys_sigaction(int sig, const struct old_sigaction *act, + struct old_sigaction *oact) +{ + struct k_sigaction new_ka, old_ka; + int ret; + + if (act) { + old_sigset_t mask; + if (!access_ok(VERIFY_READ, act, sizeof(*act)) || + __get_user(new_ka.sa.sa_handler, &act->sa_handler) || + __get_user(new_ka.sa.sa_restorer, &act->sa_restorer)) + return -EFAULT; + __get_user(new_ka.sa.sa_flags, &act->sa_flags); + __get_user(mask, &act->sa_mask); + siginitset(&new_ka.sa.sa_mask, mask); + } + + ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); + + if (!ret && oact) { + if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) || + __put_user(old_ka.sa.sa_handler, &oact->sa_handler) || + __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer)) + return -EFAULT; + __put_user(old_ka.sa.sa_flags, &oact->sa_flags); + __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask); + } + + return ret; +} + +asmlinkage int +sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss, + struct pt_regs *regs) +{ + return do_sigaltstack(uss, uoss, regs->r1); +} + +/* + * Do a signal return; undo the signal stack. + */ + +struct sigframe { + struct sigcontext sc; + unsigned long extramask[_NSIG_WORDS-1]; + unsigned long tramp[2]; /* signal trampoline */ +}; + +struct rt_sigframe { + struct siginfo info; + struct ucontext uc; + unsigned long tramp[2]; /* signal trampoline */ +}; + +static int +restore_sigcontext(struct pt_regs *regs, struct sigcontext *sc, int *rval_p) +{ + unsigned int err = 0; + +#define COPY(x) {err |= __get_user(regs->x, &sc->regs.x); } + COPY(r0); + COPY(r1); + COPY(r2); COPY(r3); COPY(r4); COPY(r5); + COPY(r6); COPY(r7); COPY(r8); COPY(r9); + COPY(r10); COPY(r11); COPY(r12); COPY(r13); + COPY(r14); COPY(r15); COPY(r16); COPY(r17); + COPY(r18); COPY(r19); COPY(r20); COPY(r21); + COPY(r22); COPY(r23); COPY(r24); COPY(r25); + COPY(r26); COPY(r27); COPY(r28); COPY(r29); + COPY(r30); COPY(r31); + COPY(pc); COPY(ear); COPY(esr); COPY(fsr); +#undef COPY + + *rval_p = regs->r3; + + return err; +} + +asmlinkage int sys_sigreturn(struct pt_regs *regs) +{ + struct sigframe *frame = + (struct sigframe *)(regs->r1 + STATE_SAVE_ARG_SPACE); + + sigset_t set; + int rval; + + if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) + goto badframe; + + if (__get_user(set.sig[0], &frame->sc.oldmask) + || (_NSIG_WORDS > 1 + && __copy_from_user(&set.sig[1], &frame->extramask, + sizeof(frame->extramask)))) + goto badframe; + + sigdelsetmask(&set, ~_BLOCKABLE); + + spin_lock_irq(¤t->sighand->siglock); + current->blocked = set; + recalc_sigpending(); + spin_unlock_irq(¤t->sighand->siglock); + + if (restore_sigcontext(regs, &frame->sc, &rval)) + goto badframe; + return rval; + +badframe: + force_sig(SIGSEGV, current); + return 0; +} + +asmlinkage int sys_rt_sigreturn(struct pt_regs *regs) +{ + struct rt_sigframe *frame = + (struct rt_sigframe *)(regs->r1 + STATE_SAVE_ARG_SPACE); + + sigset_t set; + stack_t st; + int rval; + + if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) + goto badframe; + + if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set))) + goto badframe; + + sigdelsetmask(&set, ~_BLOCKABLE); + spin_lock_irq(¤t->sighand->siglock); + current->blocked = set; + recalc_sigpending(); + spin_unlock_irq(¤t->sighand->siglock); + + if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &rval)) + goto badframe; + + if (__copy_from_user((void *)&st, &frame->uc.uc_stack, sizeof(st))) + goto badframe; + /* It is more difficult to avoid calling this function than to + call it and ignore errors. */ + do_sigaltstack(&st, NULL, regs->r1); + + return rval; + +badframe: + force_sig(SIGSEGV, current); + return 0; +} + +/* + * Set up a signal frame. + */ + +static int +setup_sigcontext(struct sigcontext *sc, struct pt_regs *regs, + unsigned long mask) +{ + int err = 0; + +#define COPY(x) {err |= __put_user(regs->x, &sc->regs.x); } + COPY(r0); + COPY(r1); + COPY(r2); COPY(r3); COPY(r4); COPY(r5); + COPY(r6); COPY(r7); COPY(r8); COPY(r9); + COPY(r10); COPY(r11); COPY(r12); COPY(r13); + COPY(r14); COPY(r15); COPY(r16); COPY(r17); + COPY(r18); COPY(r19); COPY(r20); COPY(r21); + COPY(r22); COPY(r23); COPY(r24); COPY(r25); + COPY(r26); COPY(r27); COPY(r28); COPY(r29); + COPY(r30); COPY(r31); + COPY(pc); COPY(ear); COPY(esr); COPY(fsr); +#undef COPY + + err |= __put_user(mask, &sc->oldmask); + + return err; +} + +/* + * Determine which stack to use.. + */ +static inline void * +get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size) +{ + /* Default to using normal stack */ + unsigned long sp = regs->r1; + + if ((ka->sa.sa_flags & SA_ONSTACK) != 0 && !on_sig_stack(sp)) + sp = current->sas_ss_sp + current->sas_ss_size; + + return (void *)((sp - frame_size) & -8UL); +} + +static void setup_frame(int sig, struct k_sigaction *ka, + sigset_t *set, struct pt_regs *regs) +{ + struct sigframe *frame; + int err = 0; + int signal; + + frame = get_sigframe(ka, regs, sizeof(*frame)); + + if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) + goto give_sigsegv; + + signal = current_thread_info()->exec_domain + && current_thread_info()->exec_domain->signal_invmap + && sig < 32 + ? current_thread_info()->exec_domain->signal_invmap[sig] + : sig; + + err |= setup_sigcontext(&frame->sc, regs, set->sig[0]); + + if (_NSIG_WORDS > 1) { + err |= __copy_to_user(frame->extramask, &set->sig[1], + sizeof(frame->extramask)); + } + + /* Set up to return from userspace. If provided, use a stub + already in userspace. */ + /* minus 8 is offset to cater for "rtsd r15,8" offset */ + if (ka->sa.sa_flags & SA_RESTORER) { + regs->r15 = ((unsigned long)ka->sa.sa_restorer)-8; + } else { + /* Note, these encodings are _big endian_! */ + + /* addi r12, r0, __NR_sigreturn */ + err |= __put_user(0x31800000 | __NR_sigreturn , + frame->tramp + 0); + /* brki r14, 0x8 */ + err |= __put_user(0xb9cc0008, frame->tramp + 1); + + /* Return from sighandler will jump to the tramp. + Negative 8 offset because return is rtsd r15, 8 */ + regs->r15 = ((unsigned long)frame->tramp)-8; + + __invalidate_cache_sigtramp((unsigned long)frame->tramp); + } + + if (err) + goto give_sigsegv; + + /* Set up registers for signal handler */ + regs->r1 = (unsigned long) frame - STATE_SAVE_ARG_SPACE; + + /* Signal handler args: */ + regs->r5 = signal; /* Arg 0: signum */ + regs->r6 = (unsigned long) &frame->sc; /* arg 1: sigcontext */ + + /* Offset of 4 to handle microblaze rtid r14, 0 */ + regs->pc = (unsigned long)ka->sa.sa_handler; + + set_fs(USER_DS); + +#ifdef DEBUG_SIG + printk(KERN_INFO "SIG deliver (%s:%d): sp=%p pc=%08lx\n", + current->comm, current->pid, frame, regs->pc); +#endif + + return; + +give_sigsegv: + if (sig == SIGSEGV) + ka->sa.sa_handler = SIG_DFL; + force_sig(SIGSEGV, current); +} + +static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, + sigset_t *set, struct pt_regs *regs) +{ + struct rt_sigframe *frame; + int err = 0; + int signal; + + frame = get_sigframe(ka, regs, sizeof(*frame)); + + if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) + goto give_sigsegv; + + signal = current_thread_info()->exec_domain + && current_thread_info()->exec_domain->signal_invmap + && sig < 32 + ? current_thread_info()->exec_domain->signal_invmap[sig] + : sig; + + err |= copy_siginfo_to_user(&frame->info, info); + + /* Create the ucontext. */ + err |= __put_user(0, &frame->uc.uc_flags); + err |= __put_user(0, &frame->uc.uc_link); + err |= __put_user((void *)current->sas_ss_sp, + &frame->uc.uc_stack.ss_sp); + err |= __put_user(sas_ss_flags(regs->r1), + &frame->uc.uc_stack.ss_flags); + err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size); + err |= setup_sigcontext(&frame->uc.uc_mcontext, + regs, set->sig[0]); + err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); + + /* Set up to return from userspace. If provided, use a stub + already in userspace. */ + /* minus 8 is offset to cater for "rtsd r15,8" */ + if (ka->sa.sa_flags & SA_RESTORER) { + regs->r15 = ((unsigned long)ka->sa.sa_restorer)-8; + } else { + /* addi r12, r0, __NR_sigreturn */ + err |= __put_user(0x31800000 | __NR_rt_sigreturn , + frame->tramp + 0); + /* brki r14, 0x8 */ + err |= __put_user(0xb9cc0008, frame->tramp + 1); + + /* Return from sighandler will jump to the tramp. + Negative 8 offset because return is rtsd r15, 8 */ + regs->r15 = ((unsigned long)frame->tramp)-8; + + __invalidate_cache_sigtramp((unsigned long)frame->tramp); + } + + if (err) + goto give_sigsegv; + + /* Set up registers for signal handler */ + regs->r1 = (unsigned long) frame - STATE_SAVE_ARG_SPACE; + + /* Signal handler args: */ + regs->r5 = signal; /* arg 0: signum */ + regs->r6 = (unsigned long) &frame->info; /* arg 1: siginfo */ + regs->r7 = (unsigned long) &frame->uc; /* arg2: ucontext */ + /* Offset to handle microblaze rtid r14, 0 */ + regs->pc = (unsigned long)ka->sa.sa_handler; + + set_fs(USER_DS); + +#ifdef DEBUG_SIG + printk(KERN_INFO "SIG deliver (%s:%d): sp=%p pc=%08lx\n", + current->comm, current->pid, frame, regs->pc); +#endif + + return; + +give_sigsegv: + if (sig == SIGSEGV) + ka->sa.sa_handler = SIG_DFL; + force_sig(SIGSEGV, current); +} + +/* Handle restarting system calls */ +static inline void +handle_restart(struct pt_regs *regs, struct k_sigaction *ka, int has_handler) +{ + switch (regs->r3) { + case -ERESTART_RESTARTBLOCK: + case -ERESTARTNOHAND: + if (!has_handler) + goto do_restart; + regs->r3 = -EINTR; + break; + case -ERESTARTSYS: + if (has_handler && !(ka->sa.sa_flags & SA_RESTART)) { + regs->r3 = -EINTR; + break; + } + /* fallthrough */ + case -ERESTARTNOINTR: +do_restart: + /* offset of 4 bytes to re-execute trap (brki) instruction */ + regs->pc -= 4; + break; + } +} + +/* + * OK, we're invoking a handler + */ + +static void +handle_signal(unsigned long sig, struct k_sigaction *ka, + siginfo_t *info, sigset_t *oldset, struct pt_regs *regs) +{ + /* Set up the stack frame */ + if (ka->sa.sa_flags & SA_SIGINFO) + setup_rt_frame(sig, ka, info, oldset, regs); + else + setup_frame(sig, ka, oldset, regs); + + if (ka->sa.sa_flags & SA_ONESHOT) + ka->sa.sa_handler = SIG_DFL; + + if (!(ka->sa.sa_flags & SA_NODEFER)) { + spin_lock_irq(¤t->sighand->siglock); + sigorsets(¤t->blocked, + ¤t->blocked, &ka->sa.sa_mask); + sigaddset(¤t->blocked, sig); + recalc_sigpending(); + spin_unlock_irq(¤t->sighand->siglock); + } +} + +/* + * Note that 'init' is a special process: it doesn't get signals it doesn't + * want to handle. Thus you cannot kill init even with a SIGKILL even by + * mistake. + * + * Note that we go through the signals twice: once to check the signals that + * the kernel can handle, and then we build all the user-level signal handling + * stack-frames in one go after that. + */ +int do_signal(struct pt_regs *regs, sigset_t *oldset, int in_syscall) +{ + siginfo_t info; + int signr; + struct k_sigaction ka; +#ifdef DEBUG_SIG + printk(KERN_INFO "do signal: %p %p %d\n", regs, oldset, in_syscall); + printk(KERN_INFO "do signal2: %lx %lx %ld [%lx]\n", regs->pc, regs->r1, + regs->r12, current_thread_info()->flags); +#endif + /* + * We want the common case to go fast, which + * is why we may in certain cases get here from + * kernel mode. Just return without doing anything + * if so. + */ + if (kernel_mode(regs)) + return 1; + + if (!oldset) + oldset = ¤t->blocked; + + signr = get_signal_to_deliver(&info, &ka, regs, NULL); + if (signr > 0) { + /* Whee! Actually deliver the signal. */ + if (in_syscall) + handle_restart(regs, &ka, 1); + handle_signal(signr, &ka, &info, oldset, regs); + return 1; + } + + if (in_syscall) + handle_restart(regs, NULL, 0); + + /* Did we come from a system call? */ + return 0; +} diff --git a/arch/microblaze/kernel/sys_microblaze.c b/arch/microblaze/kernel/sys_microblaze.c new file mode 100644 index 000000000000..ba0568c2cc1c --- /dev/null +++ b/arch/microblaze/kernel/sys_microblaze.c @@ -0,0 +1,225 @@ +/* + * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2007-2009 PetaLogix + * Copyright (C) 2007 John Williams <john.williams@petalogix.com> + * + * Copyright (C) 2006 Atmark Techno, Inc. + * Yasushi SHOJI <yashi@atmark-techno.com> + * Tetsuya OHKAWA <tetsuya@atmark-techno.com> + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include <linux/errno.h> +#include <linux/mm.h> +#include <linux/smp.h> +#include <linux/smp_lock.h> +#include <linux/syscalls.h> +#include <linux/sem.h> +#include <linux/msg.h> +#include <linux/shm.h> +#include <linux/stat.h> +#include <linux/mman.h> +#include <linux/sys.h> +#include <linux/ipc.h> +#include <linux/utsname.h> +#include <linux/file.h> +#include <linux/module.h> +#include <linux/err.h> +#include <linux/fs.h> +#include <linux/semaphore.h> +#include <linux/uaccess.h> +#include <linux/unistd.h> + +#include <asm/syscalls.h> +/* + * sys_ipc() is the de-multiplexer for the SysV IPC calls.. + * + * This is really horribly ugly. This will be remove with new toolchain. + */ +asmlinkage int +sys_ipc(uint call, int first, int second, int third, void *ptr, long fifth) +{ + int version, ret; + + version = call >> 16; /* hack for backward compatibility */ + call &= 0xffff; + + ret = -EINVAL; + switch (call) { + case SEMOP: + ret = sys_semop(first, (struct sembuf *)ptr, second); + break; + case SEMGET: + ret = sys_semget(first, second, third); + break; + case SEMCTL: + { + union semun fourth; + + if (!ptr) + break; + ret = (access_ok(VERIFY_READ, ptr, sizeof(long)) ? 0 : -EFAULT) + || (get_user(fourth.__pad, (void **)ptr)) ; + if (ret) + break; + ret = sys_semctl(first, second, third, fourth); + break; + } + case MSGSND: + ret = sys_msgsnd(first, (struct msgbuf *) ptr, second, third); + break; + case MSGRCV: + switch (version) { + case 0: { + struct ipc_kludge tmp; + + if (!ptr) + break; + ret = (access_ok(VERIFY_READ, ptr, sizeof(tmp)) + ? 0 : -EFAULT) || copy_from_user(&tmp, + (struct ipc_kludge *) ptr, sizeof(tmp)); + if (ret) + break; + ret = sys_msgrcv(first, tmp.msgp, second, tmp.msgtyp, + third); + break; + } + default: + ret = sys_msgrcv(first, (struct msgbuf *) ptr, + second, fifth, third); + break; + } + break; + case MSGGET: + ret = sys_msgget((key_t) first, second); + break; + case MSGCTL: + ret = sys_msgctl(first, second, (struct msqid_ds *) ptr); + break; + case SHMAT: + switch (version) { + default: { + ulong raddr; + ret = access_ok(VERIFY_WRITE, (ulong *) third, + sizeof(ulong)) ? 0 : -EFAULT; + if (ret) + break; + ret = do_shmat(first, (char *) ptr, second, &raddr); + if (ret) + break; + ret = put_user(raddr, (ulong *) third); + break; + } + case 1: /* iBCS2 emulator entry point */ + if (!segment_eq(get_fs(), get_ds())) + break; + ret = do_shmat(first, (char *) ptr, second, + (ulong *) third); + break; + } + break; + case SHMDT: + ret = sys_shmdt((char *)ptr); + break; + case SHMGET: + ret = sys_shmget(first, second, third); + break; + case SHMCTL: + ret = sys_shmctl(first, second, (struct shmid_ds *) ptr); + break; + } + return -EINVAL; +} + +asmlinkage int sys_vfork(struct pt_regs *regs) +{ + return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->r1, + regs, 0, NULL, NULL); +} + +asmlinkage int sys_clone(int flags, unsigned long stack, struct pt_regs *regs) +{ + if (!stack) + stack = regs->r1; + return do_fork(flags, stack, regs, 0, NULL, NULL); +} + +asmlinkage int sys_execve(char __user *filenamei, char __user *__user *argv, + char __user *__user *envp, struct pt_regs *regs) +{ + int error; + char *filename; + + filename = getname(filenamei); + error = PTR_ERR(filename); + if (IS_ERR(filename)) + goto out; + error = do_execve(filename, argv, envp, regs); + putname(filename); +out: + return error; +} + +asmlinkage unsigned long +sys_mmap2(unsigned long addr, size_t len, + unsigned long prot, unsigned long flags, + unsigned long fd, unsigned long pgoff) +{ + struct file *file = NULL; + int ret = -EBADF; + + flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); + if (!(flags & MAP_ANONYMOUS)) { + file = fget(fd); + if (!file) { + printk(KERN_INFO "no fd in mmap\r\n"); + goto out; + } + } + + down_write(¤t->mm->mmap_sem); + ret = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); + up_write(¤t->mm->mmap_sem); + if (file) + fput(file); +out: + return ret; +} + +asmlinkage unsigned long sys_mmap(unsigned long addr, size_t len, + unsigned long prot, unsigned long flags, + unsigned long fd, off_t offset) +{ + int err = -EINVAL; + + if (offset & ~PAGE_MASK) { + printk(KERN_INFO "no pagemask in mmap\r\n"); + goto out; + } + + err = sys_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT); +out: + return err; +} + +/* + * Do a system call from kernel instead of calling sys_execve so we + * end up with proper pt_regs. + */ +int kernel_execve(const char *filename, char *const argv[], char *const envp[]) +{ + register const char *__a __asm__("r5") = filename; + register const void *__b __asm__("r6") = argv; + register const void *__c __asm__("r7") = envp; + register unsigned long __syscall __asm__("r12") = __NR_execve; + register unsigned long __ret __asm__("r3"); + __asm__ __volatile__ ("brki r14, 0x8" + : "=r" (__ret), "=r" (__syscall) + : "1" (__syscall), "r" (__a), "r" (__b), "r" (__c) + : "r4", "r8", "r9", + "r10", "r11", "r14", "cc", "memory"); + return __ret; +} diff --git a/arch/microblaze/kernel/syscall_table.S b/arch/microblaze/kernel/syscall_table.S new file mode 100644 index 000000000000..3bb42ec924c2 --- /dev/null +++ b/arch/microblaze/kernel/syscall_table.S @@ -0,0 +1,367 @@ +ENTRY(sys_call_table) + .long sys_restart_syscall /* 0 - old "setup()" system call, + * used for restarting */ + .long sys_exit + .long sys_ni_syscall /* was fork */ + .long sys_read + .long sys_write + .long sys_open /* 5 */ + .long sys_close + .long sys_waitpid + .long sys_creat + .long sys_link + .long sys_unlink /* 10 */ + .long sys_execve_wrapper + .long sys_chdir + .long sys_time + .long sys_mknod + .long sys_chmod /* 15 */ + .long sys_lchown + .long sys_ni_syscall /* old break syscall holder */ + .long sys_ni_syscall /* old stat */ + .long sys_lseek + .long sys_getpid /* 20 */ + .long sys_mount + .long sys_oldumount + .long sys_setuid + .long sys_getuid + .long sys_stime /* 25 */ + .long sys_ptrace + .long sys_alarm + .long sys_ni_syscall /* oldfstat */ + .long sys_pause + .long sys_utime /* 30 */ + .long sys_ni_syscall /* old stty syscall holder */ + .long sys_ni_syscall /* old gtty syscall holder */ + .long sys_access + .long sys_nice + .long sys_ni_syscall /* 35 - old ftime syscall holder */ + .long sys_sync + .long sys_kill + .long sys_rename + .long sys_mkdir + .long sys_rmdir /* 40 */ + .long sys_dup + .long sys_pipe + .long sys_times + .long sys_ni_syscall /* old prof syscall holder */ + .long sys_brk /* 45 */ + .long sys_setgid + .long sys_getgid + .long sys_signal + .long sys_geteuid + .long sys_getegid /* 50 */ + .long sys_acct + .long sys_umount /* recycled never used phys() */ + .long sys_ni_syscall /* old lock syscall holder */ + .long sys_ioctl + .long sys_fcntl /* 55 */ + .long sys_ni_syscall /* old mpx syscall holder */ + .long sys_setpgid + .long sys_ni_syscall /* old ulimit syscall holder */ + .long sys_ni_syscall /* olduname */ + .long sys_umask /* 60 */ + .long sys_chroot + .long sys_ustat + .long sys_dup2 + .long sys_getppid + .long sys_getpgrp /* 65 */ + .long sys_setsid + .long sys_sigaction + .long sys_sgetmask + .long sys_ssetmask + .long sys_setreuid /* 70 */ + .long sys_setregid + .long sys_sigsuspend_wrapper + .long sys_sigpending + .long sys_sethostname + .long sys_setrlimit /* 75 */ + .long sys_ni_syscall /* old_getrlimit */ + .long sys_getrusage + .long sys_gettimeofday + .long sys_settimeofday + .long sys_getgroups /* 80 */ + .long sys_setgroups + .long sys_ni_syscall /* old_select */ + .long sys_symlink + .long sys_ni_syscall /* oldlstat */ + .long sys_readlink /* 85 */ + .long sys_uselib + .long sys_swapon + .long sys_reboot + .long sys_ni_syscall /* old_readdir */ + .long sys_mmap /* 90 */ /* old_mmap */ + .long sys_munmap + .long sys_truncate + .long sys_ftruncate + .long sys_fchmod + .long sys_fchown /* 95 */ + .long sys_getpriority + .long sys_setpriority + .long sys_ni_syscall /* old profil syscall holder */ + .long sys_statfs + .long sys_fstatfs /* 100 */ + .long sys_ni_syscall /* ioperm */ + .long sys_socketcall + .long sys_syslog /* operation with system console */ + .long sys_setitimer + .long sys_getitimer /* 105 */ + .long sys_newstat + .long sys_newlstat + .long sys_newfstat + .long sys_ni_syscall /* uname */ + .long sys_ni_syscall /* 110 */ /* iopl */ + .long sys_vhangup + .long sys_ni_syscall /* old "idle" system call */ + .long sys_ni_syscall /* old sys_vm86old */ + .long sys_wait4 + .long sys_swapoff /* 115 */ + .long sys_sysinfo + .long sys_ipc + .long sys_fsync + .long sys_sigreturn_wrapper + .long sys_clone_wrapper /* 120 */ + .long sys_setdomainname + .long sys_newuname + .long sys_ni_syscall /* modify_ldt */ + .long sys_adjtimex + .long sys_mprotect /* 125: sys_mprotect */ + .long sys_sigprocmask + .long sys_ni_syscall /* old "create_module" */ + .long sys_init_module + .long sys_delete_module + .long sys_ni_syscall /* 130: old "get_kernel_syms" */ + .long sys_quotactl + .long sys_getpgid + .long sys_fchdir + .long sys_bdflush + .long sys_sysfs /* 135 */ + .long sys_personality + .long sys_ni_syscall /* reserved for afs_syscall */ + .long sys_setfsuid + .long sys_setfsgid + .long sys_llseek /* 140 */ + .long sys_getdents + .long sys_select + .long sys_flock + .long sys_msync + .long sys_readv /* 145 */ + .long sys_writev + .long sys_getsid + .long sys_fdatasync + .long sys_sysctl + .long sys_mlock /* 150: sys_mlock */ + .long sys_munlock + .long sys_mlockall + .long sys_munlockall + .long sys_sched_setparam + .long sys_sched_getparam /* 155 */ + .long sys_sched_setscheduler + .long sys_sched_getscheduler + .long sys_sched_yield + .long sys_sched_get_priority_max + .long sys_sched_get_priority_min /* 160 */ + .long sys_sched_rr_get_interval + .long sys_nanosleep + .long sys_mremap + .long sys_setresuid + .long sys_getresuid /* 165 */ + .long sys_ni_syscall /* sys_vm86 */ + .long sys_ni_syscall /* Old sys_query_module */ + .long sys_poll + .long sys_nfsservctl + .long sys_setresgid /* 170 */ + .long sys_getresgid + .long sys_prctl + .long sys_rt_sigreturn_wrapper + .long sys_rt_sigaction + .long sys_rt_sigprocmask /* 175 */ + .long sys_rt_sigpending + .long sys_rt_sigtimedwait + .long sys_rt_sigqueueinfo + .long sys_rt_sigsuspend_wrapper + .long sys_pread64 /* 180 */ + .long sys_pwrite64 + .long sys_chown + .long sys_getcwd + .long sys_capget + .long sys_capset /* 185 */ + .long sys_ni_syscall /* sigaltstack */ + .long sys_sendfile + .long sys_ni_syscall /* reserved for streams1 */ + .long sys_ni_syscall /* reserved for streams2 */ + .long sys_vfork_wrapper /* 190 */ + .long sys_getrlimit + .long sys_mmap2 /* mmap2 */ + .long sys_truncate64 + .long sys_ftruncate64 + .long sys_stat64 /* 195 */ + .long sys_lstat64 + .long sys_fstat64 + .long sys_lchown + .long sys_getuid + .long sys_getgid /* 200 */ + .long sys_geteuid + .long sys_getegid + .long sys_setreuid + .long sys_setregid + .long sys_getgroups /* 205 */ + .long sys_setgroups + .long sys_fchown + .long sys_setresuid + .long sys_getresuid + .long sys_setresgid /* 210 */ + .long sys_getresgid + .long sys_chown + .long sys_setuid + .long sys_setgid + .long sys_setfsuid /* 215 */ + .long sys_setfsgid + .long sys_pivot_root + .long sys_mincore + .long sys_madvise + .long sys_getdents64 /* 220 */ + .long sys_fcntl64 + .long sys_ni_syscall /* reserved for TUX */ + .long sys_ni_syscall + .long sys_gettid + .long sys_readahead /* 225 */ + .long sys_setxattr + .long sys_lsetxattr + .long sys_fsetxattr + .long sys_getxattr + .long sys_lgetxattr /* 230 */ + .long sys_fgetxattr + .long sys_listxattr + .long sys_llistxattr + .long sys_flistxattr + .long sys_removexattr /* 235 */ + .long sys_lremovexattr + .long sys_fremovexattr + .long sys_tkill + .long sys_sendfile64 + .long sys_futex /* 240 */ + .long sys_sched_setaffinity + .long sys_sched_getaffinity + .long sys_ni_syscall /* set_thread_area */ + .long sys_ni_syscall /* get_thread_area */ + .long sys_io_setup /* 245 */ + .long sys_io_destroy + .long sys_io_getevents + .long sys_io_submit + .long sys_io_cancel + .long sys_fadvise64 /* 250 */ + .long sys_ni_syscall + .long sys_exit_group + .long sys_lookup_dcookie + .long sys_epoll_create + .long sys_epoll_ctl /* 255 */ + .long sys_epoll_wait + .long sys_remap_file_pages + .long sys_set_tid_address + .long sys_timer_create + .long sys_timer_settime /* 260 */ + .long sys_timer_gettime + .long sys_timer_getoverrun + .long sys_timer_delete + .long sys_clock_settime + .long sys_clock_gettime /* 265 */ + .long sys_clock_getres + .long sys_clock_nanosleep + .long sys_statfs64 + .long sys_fstatfs64 + .long sys_tgkill /* 270 */ + .long sys_utimes + .long sys_fadvise64_64 + .long sys_ni_syscall /* sys_vserver */ + .long sys_mbind + .long sys_get_mempolicy + .long sys_set_mempolicy + .long sys_mq_open + .long sys_mq_unlink + .long sys_mq_timedsend + .long sys_mq_timedreceive /* 280 */ + .long sys_mq_notify + .long sys_mq_getsetattr + .long sys_kexec_load + .long sys_waitid + .long sys_ni_syscall /* 285 */ /* available */ + .long sys_add_key + .long sys_request_key + .long sys_keyctl + .long sys_ioprio_set + .long sys_ioprio_get /* 290 */ + .long sys_inotify_init + .long sys_inotify_add_watch + .long sys_inotify_rm_watch + .long sys_ni_syscall /* sys_migrate_pages */ + .long sys_openat /* 295 */ + .long sys_mkdirat + .long sys_mknodat + .long sys_fchownat + .long sys_ni_syscall + .long sys_fstatat64 /* 300 */ + .long sys_unlinkat + .long sys_renameat + .long sys_linkat + .long sys_symlinkat + .long sys_readlinkat /* 305 */ + .long sys_fchmodat + .long sys_faccessat + .long sys_ni_syscall /* pselect6 */ + .long sys_ni_syscall /* sys_ppoll */ + .long sys_unshare /* 310 */ + .long sys_set_robust_list + .long sys_get_robust_list + .long sys_splice + .long sys_sync_file_range + .long sys_tee /* 315 */ + .long sys_vmsplice + .long sys_move_pages + .long sys_getcpu + .long sys_epoll_pwait + .long sys_utimensat /* 320 */ + .long sys_signalfd + .long sys_timerfd_create + .long sys_eventfd + .long sys_fallocate + .long sys_semtimedop /* 325 */ + .long sys_timerfd_settime + .long sys_timerfd_gettime + .long sys_semctl + .long sys_semget + .long sys_semop /* 330 */ + .long sys_msgctl + .long sys_msgget + .long sys_msgrcv + .long sys_msgsnd + .long sys_shmat /* 335 */ + .long sys_shmctl + .long sys_shmdt + .long sys_shmget + .long sys_signalfd4 /* new syscall */ + .long sys_eventfd2 /* 340 */ + .long sys_epoll_create1 + .long sys_dup3 + .long sys_pipe2 + .long sys_inotify_init1 + .long sys_socket /* 345 */ + .long sys_socketpair + .long sys_bind + .long sys_listen + .long sys_accept + .long sys_connect /* 350 */ + .long sys_getsockname + .long sys_getpeername + .long sys_sendto + .long sys_send + .long sys_recvfrom /* 355 */ + .long sys_recv + .long sys_setsockopt + .long sys_getsockopt + .long sys_shutdown + .long sys_sendmsg /* 360 */ + .long sys_recvmsg + .long sys_ni_syscall + .long sys_ni_syscall + .long sys_ni_syscall diff --git a/arch/microblaze/kernel/timer.c b/arch/microblaze/kernel/timer.c new file mode 100644 index 000000000000..bdfa2f9f0c81 --- /dev/null +++ b/arch/microblaze/kernel/timer.c @@ -0,0 +1,262 @@ +/* + * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2007-2009 PetaLogix + * Copyright (C) 2006 Atmark Techno, Inc. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/param.h> +#include <linux/interrupt.h> +#include <linux/profile.h> +#include <linux/irq.h> +#include <linux/delay.h> +#include <linux/sched.h> +#include <linux/spinlock.h> +#include <linux/err.h> +#include <linux/clk.h> +#include <linux/clocksource.h> +#include <linux/clockchips.h> +#include <linux/io.h> +#include <asm/cpuinfo.h> +#include <asm/setup.h> +#include <asm/prom.h> +#include <asm/irq.h> +#include <asm/system.h> + +#ifdef CONFIG_SELFMOD_TIMER +#include <asm/selfmod.h> +#define TIMER_BASE BARRIER_BASE_ADDR +#else +static unsigned int timer_baseaddr; +#define TIMER_BASE timer_baseaddr +#endif + +#define TCSR0 (0x00) +#define TLR0 (0x04) +#define TCR0 (0x08) +#define TCSR1 (0x10) +#define TLR1 (0x14) +#define TCR1 (0x18) + +#define TCSR_MDT (1<<0) +#define TCSR_UDT (1<<1) +#define TCSR_GENT (1<<2) +#define TCSR_CAPT (1<<3) +#define TCSR_ARHT (1<<4) +#define TCSR_LOAD (1<<5) +#define TCSR_ENIT (1<<6) +#define TCSR_ENT (1<<7) +#define TCSR_TINT (1<<8) +#define TCSR_PWMA (1<<9) +#define TCSR_ENALL (1<<10) + +static inline void microblaze_timer0_stop(void) +{ + out_be32(TIMER_BASE + TCSR0, in_be32(TIMER_BASE + TCSR0) & ~TCSR_ENT); +} + +static inline void microblaze_timer0_start_periodic(unsigned long load_val) +{ + if (!load_val) + load_val = 1; + out_be32(TIMER_BASE + TLR0, load_val); /* loading value to timer reg */ + + /* load the initial value */ + out_be32(TIMER_BASE + TCSR0, TCSR_LOAD); + + /* see timer data sheet for detail + * !ENALL - don't enable 'em all + * !PWMA - disable pwm + * TINT - clear interrupt status + * ENT- enable timer itself + * EINT - enable interrupt + * !LOAD - clear the bit to let go + * ARHT - auto reload + * !CAPT - no external trigger + * !GENT - no external signal + * UDT - set the timer as down counter + * !MDT0 - generate mode + */ + out_be32(TIMER_BASE + TCSR0, + TCSR_TINT|TCSR_ENIT|TCSR_ENT|TCSR_ARHT|TCSR_UDT); +} + +static inline void microblaze_timer0_start_oneshot(unsigned long load_val) +{ + if (!load_val) + load_val = 1; + out_be32(TIMER_BASE + TLR0, load_val); /* loading value to timer reg */ + + /* load the initial value */ + out_be32(TIMER_BASE + TCSR0, TCSR_LOAD); + + out_be32(TIMER_BASE + TCSR0, + TCSR_TINT|TCSR_ENIT|TCSR_ENT|TCSR_ARHT|TCSR_UDT); +} + +static int microblaze_timer_set_next_event(unsigned long delta, + struct clock_event_device *dev) +{ + pr_debug("%s: next event, delta %x\n", __func__, (u32)delta); + microblaze_timer0_start_oneshot(delta); + return 0; +} + +static void microblaze_timer_set_mode(enum clock_event_mode mode, + struct clock_event_device *evt) +{ + switch (mode) { + case CLOCK_EVT_MODE_PERIODIC: + printk(KERN_INFO "%s: periodic\n", __func__); + microblaze_timer0_start_periodic(cpuinfo.freq_div_hz); + break; + case CLOCK_EVT_MODE_ONESHOT: + printk(KERN_INFO "%s: oneshot\n", __func__); + break; + case CLOCK_EVT_MODE_UNUSED: + printk(KERN_INFO "%s: unused\n", __func__); + break; + case CLOCK_EVT_MODE_SHUTDOWN: + printk(KERN_INFO "%s: shutdown\n", __func__); + microblaze_timer0_stop(); + break; + case CLOCK_EVT_MODE_RESUME: + printk(KERN_INFO "%s: resume\n", __func__); + break; + } +} + +static struct clock_event_device clockevent_microblaze_timer = { + .name = "microblaze_clockevent", + .features = CLOCK_EVT_FEAT_ONESHOT | CLOCK_EVT_FEAT_PERIODIC, + .shift = 24, + .rating = 300, + .set_next_event = microblaze_timer_set_next_event, + .set_mode = microblaze_timer_set_mode, +}; + +static inline void timer_ack(void) +{ + out_be32(TIMER_BASE + TCSR0, in_be32(TIMER_BASE + TCSR0)); +} + +static irqreturn_t timer_interrupt(int irq, void *dev_id) +{ + struct clock_event_device *evt = &clockevent_microblaze_timer; +#ifdef CONFIG_HEART_BEAT + heartbeat(); +#endif + timer_ack(); + evt->event_handler(evt); + return IRQ_HANDLED; +} + +static struct irqaction timer_irqaction = { + .handler = timer_interrupt, + .flags = IRQF_DISABLED | IRQF_TIMER, + .name = "timer", + .dev_id = &clockevent_microblaze_timer, +}; + +static __init void microblaze_clockevent_init(void) +{ + clockevent_microblaze_timer.mult = + div_sc(cpuinfo.cpu_clock_freq, NSEC_PER_SEC, + clockevent_microblaze_timer.shift); + clockevent_microblaze_timer.max_delta_ns = + clockevent_delta2ns((u32)~0, &clockevent_microblaze_timer); + clockevent_microblaze_timer.min_delta_ns = + clockevent_delta2ns(1, &clockevent_microblaze_timer); + clockevent_microblaze_timer.cpumask = cpumask_of(0); + clockevents_register_device(&clockevent_microblaze_timer); +} + +static cycle_t microblaze_read(struct clocksource *cs) +{ + /* reading actual value of timer 1 */ + return (cycle_t) (in_be32(TIMER_BASE + TCR1)); +} + +static struct clocksource clocksource_microblaze = { + .name = "microblaze_clocksource", + .rating = 300, + .read = microblaze_read, + .mask = CLOCKSOURCE_MASK(32), + .shift = 24, /* I can shift it */ + .flags = CLOCK_SOURCE_IS_CONTINUOUS, +}; + +static int __init microblaze_clocksource_init(void) +{ + clocksource_microblaze.mult = + clocksource_hz2mult(cpuinfo.cpu_clock_freq, + clocksource_microblaze.shift); + if (clocksource_register(&clocksource_microblaze)) + panic("failed to register clocksource"); + + /* stop timer1 */ + out_be32(TIMER_BASE + TCSR1, in_be32(TIMER_BASE + TCSR1) & ~TCSR_ENT); + /* start timer1 - up counting without interrupt */ + out_be32(TIMER_BASE + TCSR1, TCSR_TINT|TCSR_ENT|TCSR_ARHT); + return 0; +} + +void __init time_init(void) +{ + u32 irq, i = 0; + u32 timer_num = 1; + struct device_node *timer = NULL; +#ifdef CONFIG_SELFMOD_TIMER + unsigned int timer_baseaddr = 0; + int arr_func[] = { + (int)µblaze_read, + (int)&timer_interrupt, + (int)µblaze_clocksource_init, + (int)µblaze_timer_set_mode, + (int)µblaze_timer_set_next_event, + 0 + }; +#endif + char *timer_list[] = { + "xlnx,xps-timer-1.00.a", + "xlnx,opb-timer-1.00.b", + "xlnx,opb-timer-1.00.a", + NULL + }; + + for (i = 0; timer_list[i] != NULL; i++) { + timer = of_find_compatible_node(NULL, NULL, timer_list[i]); + if (timer) + break; + } + + timer_baseaddr = *(int *) of_get_property(timer, "reg", NULL); + timer_baseaddr = (unsigned long) ioremap(timer_baseaddr, PAGE_SIZE); + irq = *(int *) of_get_property(timer, "interrupts", NULL); + timer_num = + *(int *) of_get_property(timer, "xlnx,one-timer-only", NULL); + if (timer_num) { + printk(KERN_EMERG "Please enable two timers in HW\n"); + BUG(); + } + +#ifdef CONFIG_SELFMOD_TIMER + selfmod_function((int *) arr_func, timer_baseaddr); +#endif + printk(KERN_INFO "%s #0 at 0x%08x, irq=%d\n", + timer_list[i], timer_baseaddr, irq); + + cpuinfo.freq_div_hz = cpuinfo.cpu_clock_freq / HZ; + + setup_irq(irq, &timer_irqaction); +#ifdef CONFIG_HEART_BEAT + setup_heartbeat(); +#endif + microblaze_clocksource_init(); + microblaze_clockevent_init(); +} diff --git a/arch/microblaze/kernel/traps.c b/arch/microblaze/kernel/traps.c new file mode 100644 index 000000000000..293ef486013a --- /dev/null +++ b/arch/microblaze/kernel/traps.c @@ -0,0 +1,107 @@ +/* + * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2007-2009 PetaLogix + * Copyright (C) 2006 Atmark Techno, Inc. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include <linux/kernel.h> +#include <linux/kallsyms.h> +#include <linux/module.h> +#include <linux/sched.h> +#include <linux/debug_locks.h> + +#include <asm/exceptions.h> +#include <asm/system.h> + +void trap_init(void) +{ + __enable_hw_exceptions(); +} + +void __bad_xchg(volatile void *ptr, int size) +{ + printk(KERN_INFO "xchg: bad data size: pc 0x%p, ptr 0x%p, size %d\n", + __builtin_return_address(0), ptr, size); + BUG(); +} +EXPORT_SYMBOL(__bad_xchg); + +static int kstack_depth_to_print = 24; + +static int __init kstack_setup(char *s) +{ + kstack_depth_to_print = strict_strtoul(s, 0, NULL); + + return 1; +} +__setup("kstack=", kstack_setup); + +void show_trace(struct task_struct *task, unsigned long *stack) +{ + unsigned long addr; + + if (!stack) + stack = (unsigned long *)&stack; + + printk(KERN_NOTICE "Call Trace: "); +#ifdef CONFIG_KALLSYMS + printk(KERN_NOTICE "\n"); +#endif + while (!kstack_end(stack)) { + addr = *stack++; + /* + * If the address is either in the text segment of the + * kernel, or in the region which contains vmalloc'ed + * memory, it *may* be the address of a calling + * routine; if so, print it so that someone tracing + * down the cause of the crash will be able to figure + * out the call path that was taken. + */ + if (kernel_text_address(addr)) + print_ip_sym(addr); + } + printk(KERN_NOTICE "\n"); + + if (!task) + task = current; + + debug_show_held_locks(task); +} + +void show_stack(struct task_struct *task, unsigned long *sp) +{ + unsigned long *stack; + int i; + + if (sp == NULL) { + if (task) + sp = (unsigned long *) ((struct thread_info *) + (task->stack))->cpu_context.r1; + else + sp = (unsigned long *)&sp; + } + + stack = sp; + + printk(KERN_INFO "\nStack:\n "); + + for (i = 0; i < kstack_depth_to_print; i++) { + if (kstack_end(sp)) + break; + if (i && ((i % 8) == 0)) + printk("\n "); + printk("%08lx ", *sp++); + } + printk("\n"); + show_trace(task, stack); +} + +void dump_stack(void) +{ + show_stack(NULL, NULL); +} +EXPORT_SYMBOL(dump_stack); diff --git a/arch/microblaze/kernel/vmlinux.lds.S b/arch/microblaze/kernel/vmlinux.lds.S new file mode 100644 index 000000000000..840385e51291 --- /dev/null +++ b/arch/microblaze/kernel/vmlinux.lds.S @@ -0,0 +1,163 @@ +/* + * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2008-2009 PetaLogix + * Copyright (C) 2006 Atmark Techno, Inc. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +OUTPUT_FORMAT("elf32-microblaze", "elf32-microblaze", "elf32-microblaze") +OUTPUT_ARCH(microblaze) +ENTRY(_start) + +#include <asm-generic/vmlinux.lds.h> + +jiffies = jiffies_64 + 4; + +SECTIONS { + . = CONFIG_KERNEL_BASE_ADDR; + + .text : { + _text = . ; + _stext = . ; + *(.text .text.*) + *(.fixup) + + *(.exitcall.exit) + SCHED_TEXT + LOCK_TEXT + KPROBES_TEXT + . = ALIGN (4) ; + _etext = . ; + } + + . = ALIGN (4) ; + _fdt_start = . ; /* place for fdt blob */ + . = . + 0x4000; + _fdt_end = . ; + + . = ALIGN(16); + RODATA + . = ALIGN(16); + __ex_table : { + __start___ex_table = .; + *(__ex_table) + __stop___ex_table = .; + } + + /* + * sdata2 section can go anywhere, but must be word aligned + * and SDA2_BASE must point to the middle of it + */ + .sdata2 : { + _ssrw = .; + . = ALIGN(4096); /* page aligned when MMU used - origin 0x8 */ + *(.sdata2) + . = ALIGN(8); + _essrw = .; + _ssrw_size = _essrw - _ssrw; + _KERNEL_SDA2_BASE_ = _ssrw + (_ssrw_size / 2); + } + + _sdata = . ; + .data ALIGN (4096) : { /* page aligned when MMU used - origin 0x4 */ + *(.data) + } + . = ALIGN(32); + .data.cacheline_aligned : { *(.data.cacheline_aligned) } + _edata = . ; + + /* Reserve some low RAM for r0 based memory references */ + . = ALIGN(0x4) ; + r0_ram = . ; + . = . + 4096; /* a page should be enough */ + + /* The initial task */ + . = ALIGN(8192); + .data.init_task : { *(.data.init_task) } + + /* Under the microblaze ABI, .sdata and .sbss must be contiguous */ + . = ALIGN(8); + .sdata : { + _ssro = .; + *(.sdata) + } + + .sbss : { + _ssbss = .; + *(.sbss) + _esbss = .; + _essro = .; + _ssro_size = _essro - _ssro ; + _KERNEL_SDA_BASE_ = _ssro + (_ssro_size / 2) ; + } + + __init_begin = .; + + . = ALIGN(4096); + .init.text : { + _sinittext = . ; + *(.init.text) + *(.exit.text) + *(.exit.data) + _einittext = .; + } + + .init.data : { *(.init.data) } + + . = ALIGN(4); + .init.ivt : { + __ivt_start = .; + *(.init.ivt) + __ivt_end = .; + } + + .init.setup : { + __setup_start = .; + *(.init.setup) + __setup_end = .; + } + + .initcall.init : { + __initcall_start = .; + INITCALLS + __initcall_end = .; + } + + .con_initcall.init : { + __con_initcall_start = .; + *(.con_initcall.init) + __con_initcall_end = .; + } + + __init_end_before_initramfs = .; + + .init.ramfs ALIGN(4096) : { + __initramfs_start = .; + *(.init.ramfs) + __initramfs_end = .; + . = ALIGN(4); + LONG(0); +/* + * FIXME this can break initramfs for MMU. + * Pad init.ramfs up to page boundary, + * so that __init_end == __bss_start. This will make image.elf + * consistent with the image.bin + */ + /* . = ALIGN(4096); */ + } + __init_end = .; + + .bss ALIGN (4096) : { /* page aligned when MMU used */ + __bss_start = . ; + *(.bss*) + *(COMMON) + . = ALIGN (4) ; + __bss_stop = . ; + _ebss = . ; + } + . = ALIGN(4096); + _end = .; +} |