diff options
Diffstat (limited to 'arch/blackfin/kernel')
34 files changed, 2307 insertions, 3027 deletions
diff --git a/arch/blackfin/kernel/Makefile b/arch/blackfin/kernel/Makefile index 606adc78aa85..38a233374f07 100644 --- a/arch/blackfin/kernel/Makefile +++ b/arch/blackfin/kernel/Makefile @@ -7,7 +7,7 @@ extra-y := init_task.o vmlinux.lds obj-y := \ entry.o process.o bfin_ksyms.o ptrace.o setup.o signal.o \ sys_bfin.o traps.o irqchip.o dma-mapping.o flat.o \ - fixed_code.o reboot.o bfin_gpio.o + fixed_code.o reboot.o bfin_gpio.o bfin_dma_5xx.o ifeq ($(CONFIG_GENERIC_CLOCKEVENTS),y) obj-y += time-ts.o @@ -15,8 +15,11 @@ else obj-y += time.o endif +obj-$(CONFIG_IPIPE) += ipipe.o +obj-$(CONFIG_IPIPE_TRACE_MCOUNT) += mcount.o obj-$(CONFIG_BFIN_GPTIMERS) += gptimers.o +obj-$(CONFIG_CPLB_INFO) += cplbinfo.o obj-$(CONFIG_MODULES) += module.o -obj-$(CONFIG_BFIN_DMA_5XX) += bfin_dma_5xx.o obj-$(CONFIG_KGDB) += kgdb.o +obj-$(CONFIG_KGDB_TESTCASE) += kgdb_test.o obj-$(CONFIG_EARLY_PRINTK) += early_printk.o diff --git a/arch/blackfin/kernel/asm-offsets.c b/arch/blackfin/kernel/asm-offsets.c index 9bb85dd5ccb3..b5df9459d6d5 100644 --- a/arch/blackfin/kernel/asm-offsets.c +++ b/arch/blackfin/kernel/asm-offsets.c @@ -56,6 +56,9 @@ int main(void) /* offsets into the thread struct */ DEFINE(THREAD_KSP, offsetof(struct thread_struct, ksp)); DEFINE(THREAD_USP, offsetof(struct thread_struct, usp)); + DEFINE(THREAD_SR, offsetof(struct thread_struct, seqstat)); + DEFINE(PT_SR, offsetof(struct thread_struct, seqstat)); + DEFINE(THREAD_ESP0, offsetof(struct thread_struct, esp0)); DEFINE(THREAD_PC, offsetof(struct thread_struct, pc)); DEFINE(KERNEL_STACK_SIZE, THREAD_SIZE); @@ -128,5 +131,31 @@ int main(void) DEFINE(SIGSEGV, SIGSEGV); DEFINE(SIGTRAP, SIGTRAP); + /* PDA management (in L1 scratchpad) */ + DEFINE(PDA_SYSCFG, offsetof(struct blackfin_pda, syscfg)); +#ifdef CONFIG_SMP + DEFINE(PDA_IRQFLAGS, offsetof(struct blackfin_pda, imask)); +#endif + DEFINE(PDA_IPDT, offsetof(struct blackfin_pda, ipdt)); + DEFINE(PDA_IPDT_SWAPCOUNT, offsetof(struct blackfin_pda, ipdt_swapcount)); + DEFINE(PDA_DPDT, offsetof(struct blackfin_pda, dpdt)); + DEFINE(PDA_DPDT_SWAPCOUNT, offsetof(struct blackfin_pda, dpdt_swapcount)); + DEFINE(PDA_EXIPTR, offsetof(struct blackfin_pda, ex_iptr)); + DEFINE(PDA_EXOPTR, offsetof(struct blackfin_pda, ex_optr)); + DEFINE(PDA_EXBUF, offsetof(struct blackfin_pda, ex_buf)); + DEFINE(PDA_EXIMASK, offsetof(struct blackfin_pda, ex_imask)); + DEFINE(PDA_EXSTACK, offsetof(struct blackfin_pda, ex_stack)); +#ifdef ANOMALY_05000261 + DEFINE(PDA_LFRETX, offsetof(struct blackfin_pda, last_cplb_fault_retx)); +#endif + DEFINE(PDA_DCPLB, offsetof(struct blackfin_pda, dcplb_fault_addr)); + DEFINE(PDA_ICPLB, offsetof(struct blackfin_pda, icplb_fault_addr)); + DEFINE(PDA_RETX, offsetof(struct blackfin_pda, retx)); + DEFINE(PDA_SEQSTAT, offsetof(struct blackfin_pda, seqstat)); +#ifdef CONFIG_SMP + /* Inter-core lock (in L2 SRAM) */ + DEFINE(SIZEOF_CORELOCK, sizeof(struct corelock_slot)); +#endif + return 0; } diff --git a/arch/blackfin/kernel/bfin_dma_5xx.c b/arch/blackfin/kernel/bfin_dma_5xx.c index 339293d677cc..07e02c0d1c07 100644 --- a/arch/blackfin/kernel/bfin_dma_5xx.c +++ b/arch/blackfin/kernel/bfin_dma_5xx.c @@ -1,63 +1,27 @@ /* - * File: arch/blackfin/kernel/bfin_dma_5xx.c - * Based on: - * Author: + * bfin_dma_5xx.c - Blackfin DMA implementation * - * Created: - * Description: This file contains the simple DMA Implementation for Blackfin - * - * Modified: - * Copyright 2004-2006 Analog Devices Inc. - * - * Bugs: Enter bugs at http://blackfin.uclinux.org/ - * - * 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. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see the file COPYING, or write - * to the Free Software Foundation, Inc., - * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * Copyright 2004-2008 Analog Devices Inc. + * Licensed under the GPL-2 or later. */ #include <linux/errno.h> -#include <linux/module.h> -#include <linux/sched.h> #include <linux/interrupt.h> #include <linux/kernel.h> +#include <linux/module.h> #include <linux/param.h> +#include <linux/proc_fs.h> +#include <linux/sched.h> +#include <linux/seq_file.h> +#include <linux/spinlock.h> #include <asm/blackfin.h> -#include <asm/dma.h> #include <asm/cacheflush.h> +#include <asm/dma.h> +#include <asm/uaccess.h> -/* Remove unused code not exported by symbol or internally called */ -#define REMOVE_DEAD_CODE - -/************************************************************************** - * Global Variables -***************************************************************************/ - -static struct dma_channel dma_ch[MAX_BLACKFIN_DMA_CHANNEL]; - -/*------------------------------------------------------------------------------ - * Set the Buffer Clear bit in the Configuration register of specific DMA - * channel. This will stop the descriptor based DMA operation. - *-----------------------------------------------------------------------------*/ -static void clear_dma_buffer(unsigned int channel) -{ - dma_ch[channel].regs->cfg |= RESTART; - SSYNC(); - dma_ch[channel].regs->cfg &= ~RESTART; - SSYNC(); -} +struct dma_channel dma_ch[MAX_DMA_CHANNELS]; +EXPORT_SYMBOL(dma_ch); static int __init blackfin_dma_init(void) { @@ -65,32 +29,67 @@ static int __init blackfin_dma_init(void) printk(KERN_INFO "Blackfin DMA Controller\n"); - for (i = 0; i < MAX_BLACKFIN_DMA_CHANNEL; i++) { + for (i = 0; i < MAX_DMA_CHANNELS; i++) { dma_ch[i].chan_status = DMA_CHANNEL_FREE; dma_ch[i].regs = dma_io_base_addr[i]; mutex_init(&(dma_ch[i].dmalock)); } /* Mark MEMDMA Channel 0 as requested since we're using it internally */ - dma_ch[CH_MEM_STREAM0_DEST].chan_status = DMA_CHANNEL_REQUESTED; - dma_ch[CH_MEM_STREAM0_SRC].chan_status = DMA_CHANNEL_REQUESTED; + request_dma(CH_MEM_STREAM0_DEST, "Blackfin dma_memcpy"); + request_dma(CH_MEM_STREAM0_SRC, "Blackfin dma_memcpy"); #if defined(CONFIG_DEB_DMA_URGENT) bfin_write_EBIU_DDRQUE(bfin_read_EBIU_DDRQUE() | DEB1_URGENT | DEB2_URGENT | DEB3_URGENT); #endif + return 0; } - arch_initcall(blackfin_dma_init); -/*------------------------------------------------------------------------------ - * Request the specific DMA channel from the system. - *-----------------------------------------------------------------------------*/ -int request_dma(unsigned int channel, char *device_id) +#ifdef CONFIG_PROC_FS +static int proc_dma_show(struct seq_file *m, void *v) { + int i; + + for (i = 0; i < MAX_DMA_CHANNELS; ++i) + if (dma_ch[i].chan_status != DMA_CHANNEL_FREE) + seq_printf(m, "%2d: %s\n", i, dma_ch[i].device_id); + + return 0; +} +static int proc_dma_open(struct inode *inode, struct file *file) +{ + return single_open(file, proc_dma_show, NULL); +} + +static const struct file_operations proc_dma_operations = { + .open = proc_dma_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static int __init proc_dma_init(void) +{ + return proc_create("dma", 0, NULL, &proc_dma_operations) != NULL; +} +late_initcall(proc_dma_init); +#endif + +/** + * request_dma - request a DMA channel + * + * Request the specific DMA channel from the system if it's available. + */ +int request_dma(unsigned int channel, const char *device_id) +{ pr_debug("request_dma() : BEGIN \n"); + if (device_id == NULL) + printk(KERN_WARNING "request_dma(%u): no device_id given\n", channel); + #if defined(CONFIG_BF561) && ANOMALY_05000182 if (channel >= CH_IMEM_STREAM0_DEST && channel <= CH_IMEM_STREAM1_DEST) { if (get_cclk() > 500000000) { @@ -129,60 +128,63 @@ int request_dma(unsigned int channel, char *device_id) #endif dma_ch[channel].device_id = device_id; - dma_ch[channel].irq_callback = NULL; + dma_ch[channel].irq = 0; /* This is to be enabled by putting a restriction - * you have to request DMA, before doing any operations on * descriptor/channel */ pr_debug("request_dma() : END \n"); - return channel; + return 0; } EXPORT_SYMBOL(request_dma); -int set_dma_callback(unsigned int channel, dma_interrupt_t callback, void *data) +int set_dma_callback(unsigned int channel, irq_handler_t callback, void *data) { - int ret_irq = 0; - BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE - && channel < MAX_BLACKFIN_DMA_CHANNEL)); + && channel < MAX_DMA_CHANNELS)); if (callback != NULL) { - int ret_val; - ret_irq = channel2irq(channel); + int ret; + unsigned int irq = channel2irq(channel); - dma_ch[channel].data = data; + ret = request_irq(irq, callback, IRQF_DISABLED, + dma_ch[channel].device_id, data); + if (ret) + return ret; - ret_val = - request_irq(ret_irq, (void *)callback, IRQF_DISABLED, - dma_ch[channel].device_id, data); - if (ret_val) { - printk(KERN_NOTICE - "Request irq in DMA engine failed.\n"); - return -EPERM; - } - dma_ch[channel].irq_callback = callback; + dma_ch[channel].irq = irq; + dma_ch[channel].data = data; } return 0; } EXPORT_SYMBOL(set_dma_callback); -void free_dma(unsigned int channel) +/** + * clear_dma_buffer - clear DMA fifos for specified channel + * + * Set the Buffer Clear bit in the Configuration register of specific DMA + * channel. This will stop the descriptor based DMA operation. + */ +static void clear_dma_buffer(unsigned int channel) { - int ret_irq; + dma_ch[channel].regs->cfg |= RESTART; + SSYNC(); + dma_ch[channel].regs->cfg &= ~RESTART; +} +void free_dma(unsigned int channel) +{ pr_debug("freedma() : BEGIN \n"); BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE - && channel < MAX_BLACKFIN_DMA_CHANNEL)); + && channel < MAX_DMA_CHANNELS)); /* Halt the DMA */ disable_dma(channel); clear_dma_buffer(channel); - if (dma_ch[channel].irq_callback != NULL) { - ret_irq = channel2irq(channel); - free_irq(ret_irq, dma_ch[channel].data); - } + if (dma_ch[channel].irq) + free_irq(dma_ch[channel].irq, dma_ch[channel].data); /* Clear the DMA Variable in the Channel */ mutex_lock(&(dma_ch[channel].dmalock)); @@ -193,294 +195,15 @@ void free_dma(unsigned int channel) } EXPORT_SYMBOL(free_dma); -void dma_enable_irq(unsigned int channel) -{ - int ret_irq; - - pr_debug("dma_enable_irq() : BEGIN \n"); - BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE - && channel < MAX_BLACKFIN_DMA_CHANNEL)); - - ret_irq = channel2irq(channel); - enable_irq(ret_irq); -} -EXPORT_SYMBOL(dma_enable_irq); - -void dma_disable_irq(unsigned int channel) -{ - int ret_irq; - - pr_debug("dma_disable_irq() : BEGIN \n"); - BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE - && channel < MAX_BLACKFIN_DMA_CHANNEL)); - - ret_irq = channel2irq(channel); - disable_irq(ret_irq); -} -EXPORT_SYMBOL(dma_disable_irq); - -int dma_channel_active(unsigned int channel) -{ - if (dma_ch[channel].chan_status == DMA_CHANNEL_FREE) { - return 0; - } else { - return 1; - } -} -EXPORT_SYMBOL(dma_channel_active); - -/*------------------------------------------------------------------------------ -* stop the specific DMA channel. -*-----------------------------------------------------------------------------*/ -void disable_dma(unsigned int channel) -{ - pr_debug("stop_dma() : BEGIN \n"); - - BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE - && channel < MAX_BLACKFIN_DMA_CHANNEL)); - - dma_ch[channel].regs->cfg &= ~DMAEN; /* Clean the enable bit */ - SSYNC(); - dma_ch[channel].chan_status = DMA_CHANNEL_REQUESTED; - /* Needs to be enabled Later */ - pr_debug("stop_dma() : END \n"); - return; -} -EXPORT_SYMBOL(disable_dma); - -void enable_dma(unsigned int channel) -{ - pr_debug("enable_dma() : BEGIN \n"); - - BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE - && channel < MAX_BLACKFIN_DMA_CHANNEL)); - - dma_ch[channel].chan_status = DMA_CHANNEL_ENABLED; - dma_ch[channel].regs->curr_x_count = 0; - dma_ch[channel].regs->curr_y_count = 0; - - dma_ch[channel].regs->cfg |= DMAEN; /* Set the enable bit */ - SSYNC(); - pr_debug("enable_dma() : END \n"); - return; -} -EXPORT_SYMBOL(enable_dma); - -/*------------------------------------------------------------------------------ -* Set the Start Address register for the specific DMA channel -* This function can be used for register based DMA, -* to setup the start address -* addr: Starting address of the DMA Data to be transferred. -*-----------------------------------------------------------------------------*/ -void set_dma_start_addr(unsigned int channel, unsigned long addr) -{ - pr_debug("set_dma_start_addr() : BEGIN \n"); - - BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE - && channel < MAX_BLACKFIN_DMA_CHANNEL)); - - dma_ch[channel].regs->start_addr = addr; - SSYNC(); - pr_debug("set_dma_start_addr() : END\n"); -} -EXPORT_SYMBOL(set_dma_start_addr); - -void set_dma_next_desc_addr(unsigned int channel, unsigned long addr) -{ - pr_debug("set_dma_next_desc_addr() : BEGIN \n"); - - BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE - && channel < MAX_BLACKFIN_DMA_CHANNEL)); - - dma_ch[channel].regs->next_desc_ptr = addr; - SSYNC(); - pr_debug("set_dma_next_desc_addr() : END\n"); -} -EXPORT_SYMBOL(set_dma_next_desc_addr); - -void set_dma_curr_desc_addr(unsigned int channel, unsigned long addr) -{ - pr_debug("set_dma_curr_desc_addr() : BEGIN \n"); - - BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE - && channel < MAX_BLACKFIN_DMA_CHANNEL)); - - dma_ch[channel].regs->curr_desc_ptr = addr; - SSYNC(); - pr_debug("set_dma_curr_desc_addr() : END\n"); -} -EXPORT_SYMBOL(set_dma_curr_desc_addr); - -void set_dma_x_count(unsigned int channel, unsigned short x_count) -{ - BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE - && channel < MAX_BLACKFIN_DMA_CHANNEL)); - - dma_ch[channel].regs->x_count = x_count; - SSYNC(); -} -EXPORT_SYMBOL(set_dma_x_count); - -void set_dma_y_count(unsigned int channel, unsigned short y_count) -{ - BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE - && channel < MAX_BLACKFIN_DMA_CHANNEL)); - - dma_ch[channel].regs->y_count = y_count; - SSYNC(); -} -EXPORT_SYMBOL(set_dma_y_count); - -void set_dma_x_modify(unsigned int channel, short x_modify) -{ - BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE - && channel < MAX_BLACKFIN_DMA_CHANNEL)); - - dma_ch[channel].regs->x_modify = x_modify; - SSYNC(); -} -EXPORT_SYMBOL(set_dma_x_modify); - -void set_dma_y_modify(unsigned int channel, short y_modify) -{ - BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE - && channel < MAX_BLACKFIN_DMA_CHANNEL)); - - dma_ch[channel].regs->y_modify = y_modify; - SSYNC(); -} -EXPORT_SYMBOL(set_dma_y_modify); - -void set_dma_config(unsigned int channel, unsigned short config) -{ - BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE - && channel < MAX_BLACKFIN_DMA_CHANNEL)); - - dma_ch[channel].regs->cfg = config; - SSYNC(); -} -EXPORT_SYMBOL(set_dma_config); - -unsigned short -set_bfin_dma_config(char direction, char flow_mode, - char intr_mode, char dma_mode, char width, char syncmode) -{ - unsigned short config; - - config = - ((direction << 1) | (width << 2) | (dma_mode << 4) | - (intr_mode << 6) | (flow_mode << 12) | (syncmode << 5)); - return config; -} -EXPORT_SYMBOL(set_bfin_dma_config); - -void set_dma_sg(unsigned int channel, struct dmasg *sg, int nr_sg) -{ - BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE - && channel < MAX_BLACKFIN_DMA_CHANNEL)); - - dma_ch[channel].regs->cfg |= ((nr_sg & 0x0F) << 8); - - dma_ch[channel].regs->next_desc_ptr = (unsigned int)sg; - - SSYNC(); -} -EXPORT_SYMBOL(set_dma_sg); - -void set_dma_curr_addr(unsigned int channel, unsigned long addr) -{ - BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE - && channel < MAX_BLACKFIN_DMA_CHANNEL)); - - dma_ch[channel].regs->curr_addr_ptr = addr; - SSYNC(); -} -EXPORT_SYMBOL(set_dma_curr_addr); - -/*------------------------------------------------------------------------------ - * Get the DMA status of a specific DMA channel from the system. - *-----------------------------------------------------------------------------*/ -unsigned short get_dma_curr_irqstat(unsigned int channel) -{ - BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE - && channel < MAX_BLACKFIN_DMA_CHANNEL)); - - return dma_ch[channel].regs->irq_status; -} -EXPORT_SYMBOL(get_dma_curr_irqstat); - -/*------------------------------------------------------------------------------ - * Clear the DMA_DONE bit in DMA status. Stop the DMA completion interrupt. - *-----------------------------------------------------------------------------*/ -void clear_dma_irqstat(unsigned int channel) -{ - BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE - && channel < MAX_BLACKFIN_DMA_CHANNEL)); - dma_ch[channel].regs->irq_status |= 3; -} -EXPORT_SYMBOL(clear_dma_irqstat); - -/*------------------------------------------------------------------------------ - * Get current DMA xcount of a specific DMA channel from the system. - *-----------------------------------------------------------------------------*/ -unsigned short get_dma_curr_xcount(unsigned int channel) -{ - BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE - && channel < MAX_BLACKFIN_DMA_CHANNEL)); - - return dma_ch[channel].regs->curr_x_count; -} -EXPORT_SYMBOL(get_dma_curr_xcount); - -/*------------------------------------------------------------------------------ - * Get current DMA ycount of a specific DMA channel from the system. - *-----------------------------------------------------------------------------*/ -unsigned short get_dma_curr_ycount(unsigned int channel) -{ - BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE - && channel < MAX_BLACKFIN_DMA_CHANNEL)); - - return dma_ch[channel].regs->curr_y_count; -} -EXPORT_SYMBOL(get_dma_curr_ycount); - -unsigned long get_dma_next_desc_ptr(unsigned int channel) -{ - BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE - && channel < MAX_BLACKFIN_DMA_CHANNEL)); - - return dma_ch[channel].regs->next_desc_ptr; -} -EXPORT_SYMBOL(get_dma_next_desc_ptr); - -unsigned long get_dma_curr_desc_ptr(unsigned int channel) -{ - BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE - && channel < MAX_BLACKFIN_DMA_CHANNEL)); - - return dma_ch[channel].regs->curr_desc_ptr; -} -EXPORT_SYMBOL(get_dma_curr_desc_ptr); - -unsigned long get_dma_curr_addr(unsigned int channel) -{ - BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE - && channel < MAX_BLACKFIN_DMA_CHANNEL)); - - return dma_ch[channel].regs->curr_addr_ptr; -} -EXPORT_SYMBOL(get_dma_curr_addr); - #ifdef CONFIG_PM +# ifndef MAX_DMA_SUSPEND_CHANNELS +# define MAX_DMA_SUSPEND_CHANNELS MAX_DMA_CHANNELS +# endif int blackfin_dma_suspend(void) { int i; -#ifdef CONFIG_BF561 /* IMDMA channels doesn't have a PERIPHERAL_MAP */ - for (i = 0; i <= CH_MEM_STREAM3_SRC; i++) { -#else - for (i = 0; i < MAX_BLACKFIN_DMA_CHANNEL; i++) { -#endif + for (i = 0; i < MAX_DMA_SUSPEND_CHANNELS; ++i) { if (dma_ch[i].chan_status == DMA_CHANNEL_ENABLED) { printk(KERN_ERR "DMA Channel %d failed to suspend\n", i); return -EBUSY; @@ -495,388 +218,201 @@ int blackfin_dma_suspend(void) void blackfin_dma_resume(void) { int i; - -#ifdef CONFIG_BF561 /* IMDMA channels doesn't have a PERIPHERAL_MAP */ - for (i = 0; i <= CH_MEM_STREAM3_SRC; i++) -#else - for (i = 0; i < MAX_BLACKFIN_DMA_CHANNEL; i++) -#endif + for (i = 0; i < MAX_DMA_SUSPEND_CHANNELS; ++i) dma_ch[i].regs->peripheral_map = dma_ch[i].saved_peripheral_map; } #endif -static void *__dma_memcpy(void *dest, const void *src, size_t size) +/** + * blackfin_dma_early_init - minimal DMA init + * + * Setup a few DMA registers so we can safely do DMA transfers early on in + * the kernel booting process. Really this just means using dma_memcpy(). + */ +void __init blackfin_dma_early_init(void) { - int direction; /* 1 - address decrease, 0 - address increase */ - int flag_align; /* 1 - address aligned, 0 - address unaligned */ - int flag_2D; /* 1 - 2D DMA needed, 0 - 1D DMA needed */ - unsigned long flags; - - if (size <= 0) - return NULL; - - local_irq_save(flags); - - if ((unsigned long)src < memory_end) - blackfin_dcache_flush_range((unsigned int)src, - (unsigned int)(src + size)); - - if ((unsigned long)dest < memory_end) - blackfin_dcache_invalidate_range((unsigned int)dest, - (unsigned int)(dest + size)); - - bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); - - if ((unsigned long)src < (unsigned long)dest) - direction = 1; - else - direction = 0; - - if ((((unsigned long)dest % 2) == 0) && (((unsigned long)src % 2) == 0) - && ((size % 2) == 0)) - flag_align = 1; - else - flag_align = 0; - - if (size > 0x10000) /* size > 64K */ - flag_2D = 1; - else - flag_2D = 0; - - /* Setup destination and source start address */ - if (direction) { - if (flag_align) { - bfin_write_MDMA_D0_START_ADDR(dest + size - 2); - bfin_write_MDMA_S0_START_ADDR(src + size - 2); - } else { - bfin_write_MDMA_D0_START_ADDR(dest + size - 1); - bfin_write_MDMA_S0_START_ADDR(src + size - 1); - } - } else { - bfin_write_MDMA_D0_START_ADDR(dest); - bfin_write_MDMA_S0_START_ADDR(src); - } - - /* Setup destination and source xcount */ - if (flag_2D) { - if (flag_align) { - bfin_write_MDMA_D0_X_COUNT(1024 / 2); - bfin_write_MDMA_S0_X_COUNT(1024 / 2); - } else { - bfin_write_MDMA_D0_X_COUNT(1024); - bfin_write_MDMA_S0_X_COUNT(1024); - } - bfin_write_MDMA_D0_Y_COUNT(size >> 10); - bfin_write_MDMA_S0_Y_COUNT(size >> 10); - } else { - if (flag_align) { - bfin_write_MDMA_D0_X_COUNT(size / 2); - bfin_write_MDMA_S0_X_COUNT(size / 2); - } else { - bfin_write_MDMA_D0_X_COUNT(size); - bfin_write_MDMA_S0_X_COUNT(size); - } - } - - /* Setup destination and source xmodify and ymodify */ - if (direction) { - if (flag_align) { - bfin_write_MDMA_D0_X_MODIFY(-2); - bfin_write_MDMA_S0_X_MODIFY(-2); - if (flag_2D) { - bfin_write_MDMA_D0_Y_MODIFY(-2); - bfin_write_MDMA_S0_Y_MODIFY(-2); - } - } else { - bfin_write_MDMA_D0_X_MODIFY(-1); - bfin_write_MDMA_S0_X_MODIFY(-1); - if (flag_2D) { - bfin_write_MDMA_D0_Y_MODIFY(-1); - bfin_write_MDMA_S0_Y_MODIFY(-1); - } - } - } else { - if (flag_align) { - bfin_write_MDMA_D0_X_MODIFY(2); - bfin_write_MDMA_S0_X_MODIFY(2); - if (flag_2D) { - bfin_write_MDMA_D0_Y_MODIFY(2); - bfin_write_MDMA_S0_Y_MODIFY(2); - } - } else { - bfin_write_MDMA_D0_X_MODIFY(1); - bfin_write_MDMA_S0_X_MODIFY(1); - if (flag_2D) { - bfin_write_MDMA_D0_Y_MODIFY(1); - bfin_write_MDMA_S0_Y_MODIFY(1); - } - } - } - - /* Enable source DMA */ - if (flag_2D) { - if (flag_align) { - bfin_write_MDMA_S0_CONFIG(DMAEN | DMA2D | WDSIZE_16); - bfin_write_MDMA_D0_CONFIG(WNR | DI_EN | DMAEN | DMA2D | WDSIZE_16); - } else { - bfin_write_MDMA_S0_CONFIG(DMAEN | DMA2D); - bfin_write_MDMA_D0_CONFIG(WNR | DI_EN | DMAEN | DMA2D); - } - } else { - if (flag_align) { - bfin_write_MDMA_S0_CONFIG(DMAEN | WDSIZE_16); - bfin_write_MDMA_D0_CONFIG(WNR | DI_EN | DMAEN | WDSIZE_16); - } else { - bfin_write_MDMA_S0_CONFIG(DMAEN); - bfin_write_MDMA_D0_CONFIG(WNR | DI_EN | DMAEN); - } - } - - SSYNC(); - - while (!(bfin_read_MDMA_D0_IRQ_STATUS() & DMA_DONE)) - ; - - bfin_write_MDMA_D0_IRQ_STATUS(bfin_read_MDMA_D0_IRQ_STATUS() | - (DMA_DONE | DMA_ERR)); - bfin_write_MDMA_S0_CONFIG(0); - bfin_write_MDMA_D0_CONFIG(0); - - local_irq_restore(flags); - - return dest; } -void *dma_memcpy(void *dest, const void *src, size_t size) -{ - size_t bulk; - size_t rest; - void * addr; - - bulk = (size >> 16) << 16; - rest = size - bulk; - if (bulk) - __dma_memcpy(dest, src, bulk); - addr = __dma_memcpy(dest+bulk, src+bulk, rest); - return addr; -} -EXPORT_SYMBOL(dma_memcpy); - -void *safe_dma_memcpy(void *dest, const void *src, size_t size) -{ - void *addr; - addr = dma_memcpy(dest, src, size); - return addr; -} -EXPORT_SYMBOL(safe_dma_memcpy); - -void dma_outsb(unsigned long addr, const void *buf, unsigned short len) +/** + * __dma_memcpy - program the MDMA registers + * + * Actually program MDMA0 and wait for the transfer to finish. Disable IRQs + * while programming registers so that everything is fully configured. Wait + * for DMA to finish with IRQs enabled. If interrupted, the initial DMA_DONE + * check will make sure we don't clobber any existing transfer. + */ +static void __dma_memcpy(u32 daddr, s16 dmod, u32 saddr, s16 smod, size_t cnt, u32 conf) { + static DEFINE_SPINLOCK(mdma_lock); unsigned long flags; - local_irq_save(flags); - - blackfin_dcache_flush_range((unsigned int)buf, - (unsigned int)(buf) + len); + spin_lock_irqsave(&mdma_lock, flags); + + if (bfin_read_MDMA_S0_CONFIG()) + while (!(bfin_read_MDMA_D0_IRQ_STATUS() & DMA_DONE)) + continue; + + if (conf & DMA2D) { + /* For larger bit sizes, we've already divided down cnt so it + * is no longer a multiple of 64k. So we have to break down + * the limit here so it is a multiple of the incoming size. + * There is no limitation here in terms of total size other + * than the hardware though as the bits lost in the shift are + * made up by MODIFY (== we can hit the whole address space). + * X: (2^(16 - 0)) * 1 == (2^(16 - 1)) * 2 == (2^(16 - 2)) * 4 + */ + u32 shift = abs(dmod) >> 1; + size_t ycnt = cnt >> (16 - shift); + cnt = 1 << (16 - shift); + bfin_write_MDMA_D0_Y_COUNT(ycnt); + bfin_write_MDMA_S0_Y_COUNT(ycnt); + bfin_write_MDMA_D0_Y_MODIFY(dmod); + bfin_write_MDMA_S0_Y_MODIFY(smod); + } - bfin_write_MDMA_D0_START_ADDR(addr); - bfin_write_MDMA_D0_X_COUNT(len); - bfin_write_MDMA_D0_X_MODIFY(0); + bfin_write_MDMA_D0_START_ADDR(daddr); + bfin_write_MDMA_D0_X_COUNT(cnt); + bfin_write_MDMA_D0_X_MODIFY(dmod); bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); - bfin_write_MDMA_S0_START_ADDR(buf); - bfin_write_MDMA_S0_X_COUNT(len); - bfin_write_MDMA_S0_X_MODIFY(1); + bfin_write_MDMA_S0_START_ADDR(saddr); + bfin_write_MDMA_S0_X_COUNT(cnt); + bfin_write_MDMA_S0_X_MODIFY(smod); bfin_write_MDMA_S0_IRQ_STATUS(DMA_DONE | DMA_ERR); - bfin_write_MDMA_S0_CONFIG(DMAEN | WDSIZE_8); - bfin_write_MDMA_D0_CONFIG(WNR | DI_EN | DMAEN | WDSIZE_8); + bfin_write_MDMA_S0_CONFIG(DMAEN | conf); + bfin_write_MDMA_D0_CONFIG(WNR | DI_EN | DMAEN | conf); + + spin_unlock_irqrestore(&mdma_lock, flags); SSYNC(); - while (!(bfin_read_MDMA_D0_IRQ_STATUS() & DMA_DONE)); + while (!(bfin_read_MDMA_D0_IRQ_STATUS() & DMA_DONE)) + if (bfin_read_MDMA_S0_CONFIG()) + continue; + else + return; bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); bfin_write_MDMA_S0_CONFIG(0); bfin_write_MDMA_D0_CONFIG(0); - local_irq_restore(flags); - } -EXPORT_SYMBOL(dma_outsb); - -void dma_insb(unsigned long addr, void *buf, unsigned short len) +/** + * _dma_memcpy - translate C memcpy settings into MDMA settings + * + * Handle all the high level steps before we touch the MDMA registers. So + * handle direction, tweaking of sizes, and formatting of addresses. + */ +static void *_dma_memcpy(void *pdst, const void *psrc, size_t size) { - unsigned long flags; - - blackfin_dcache_invalidate_range((unsigned int)buf, - (unsigned int)(buf) + len); - - local_irq_save(flags); - bfin_write_MDMA_D0_START_ADDR(buf); - bfin_write_MDMA_D0_X_COUNT(len); - bfin_write_MDMA_D0_X_MODIFY(1); - bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); - - bfin_write_MDMA_S0_START_ADDR(addr); - bfin_write_MDMA_S0_X_COUNT(len); - bfin_write_MDMA_S0_X_MODIFY(0); - bfin_write_MDMA_S0_IRQ_STATUS(DMA_DONE | DMA_ERR); + u32 conf, shift; + s16 mod; + unsigned long dst = (unsigned long)pdst; + unsigned long src = (unsigned long)psrc; - bfin_write_MDMA_S0_CONFIG(DMAEN | WDSIZE_8); - bfin_write_MDMA_D0_CONFIG(WNR | DI_EN | DMAEN | WDSIZE_8); + if (size == 0) + return NULL; - SSYNC(); + if (dst % 4 == 0 && src % 4 == 0 && size % 4 == 0) { + conf = WDSIZE_32; + shift = 2; + } else if (dst % 2 == 0 && src % 2 == 0 && size % 2 == 0) { + conf = WDSIZE_16; + shift = 1; + } else { + conf = WDSIZE_8; + shift = 0; + } - while (!(bfin_read_MDMA_D0_IRQ_STATUS() & DMA_DONE)); + /* If the two memory regions have a chance of overlapping, make + * sure the memcpy still works as expected. Do this by having the + * copy run backwards instead. + */ + mod = 1 << shift; + if (src < dst) { + mod *= -1; + dst += size + mod; + src += size + mod; + } + size >>= shift; - bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); + if (size > 0x10000) + conf |= DMA2D; - bfin_write_MDMA_S0_CONFIG(0); - bfin_write_MDMA_D0_CONFIG(0); - local_irq_restore(flags); + __dma_memcpy(dst, mod, src, mod, size, conf); + return pdst; } -EXPORT_SYMBOL(dma_insb); -void dma_outsw(unsigned long addr, const void *buf, unsigned short len) +/** + * dma_memcpy - DMA memcpy under mutex lock + * + * Do not check arguments before starting the DMA memcpy. Break the transfer + * up into two pieces. The first transfer is in multiples of 64k and the + * second transfer is the piece smaller than 64k. + */ +void *dma_memcpy(void *pdst, const void *psrc, size_t size) { - unsigned long flags; - - local_irq_save(flags); + unsigned long dst = (unsigned long)pdst; + unsigned long src = (unsigned long)psrc; + size_t bulk, rest; - blackfin_dcache_flush_range((unsigned int)buf, - (unsigned int)(buf) + len * sizeof(short)); + if (bfin_addr_dcachable(src)) + blackfin_dcache_flush_range(src, src + size); - bfin_write_MDMA_D0_START_ADDR(addr); - bfin_write_MDMA_D0_X_COUNT(len); - bfin_write_MDMA_D0_X_MODIFY(0); - bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); - - bfin_write_MDMA_S0_START_ADDR(buf); - bfin_write_MDMA_S0_X_COUNT(len); - bfin_write_MDMA_S0_X_MODIFY(2); - bfin_write_MDMA_S0_IRQ_STATUS(DMA_DONE | DMA_ERR); - - bfin_write_MDMA_S0_CONFIG(DMAEN | WDSIZE_16); - bfin_write_MDMA_D0_CONFIG(WNR | DI_EN | DMAEN | WDSIZE_16); - - SSYNC(); - - while (!(bfin_read_MDMA_D0_IRQ_STATUS() & DMA_DONE)); - - bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); - - bfin_write_MDMA_S0_CONFIG(0); - bfin_write_MDMA_D0_CONFIG(0); - local_irq_restore(flags); + if (bfin_addr_dcachable(dst)) + blackfin_dcache_invalidate_range(dst, dst + size); + bulk = size & ~0xffff; + rest = size - bulk; + if (bulk) + _dma_memcpy(pdst, psrc, bulk); + _dma_memcpy(pdst + bulk, psrc + bulk, rest); + return pdst; } -EXPORT_SYMBOL(dma_outsw); +EXPORT_SYMBOL(dma_memcpy); -void dma_insw(unsigned long addr, void *buf, unsigned short len) +/** + * safe_dma_memcpy - DMA memcpy w/argument checking + * + * Verify arguments are safe before heading to dma_memcpy(). + */ +void *safe_dma_memcpy(void *dst, const void *src, size_t size) { - unsigned long flags; - - blackfin_dcache_invalidate_range((unsigned int)buf, - (unsigned int)(buf) + len * sizeof(short)); - - local_irq_save(flags); - - bfin_write_MDMA_D0_START_ADDR(buf); - bfin_write_MDMA_D0_X_COUNT(len); - bfin_write_MDMA_D0_X_MODIFY(2); - bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); - - bfin_write_MDMA_S0_START_ADDR(addr); - bfin_write_MDMA_S0_X_COUNT(len); - bfin_write_MDMA_S0_X_MODIFY(0); - bfin_write_MDMA_S0_IRQ_STATUS(DMA_DONE | DMA_ERR); - - bfin_write_MDMA_S0_CONFIG(DMAEN | WDSIZE_16); - bfin_write_MDMA_D0_CONFIG(WNR | DI_EN | DMAEN | WDSIZE_16); - - SSYNC(); - - while (!(bfin_read_MDMA_D0_IRQ_STATUS() & DMA_DONE)); - - bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); - - bfin_write_MDMA_S0_CONFIG(0); - bfin_write_MDMA_D0_CONFIG(0); - local_irq_restore(flags); - + if (!access_ok(VERIFY_WRITE, dst, size)) + return NULL; + if (!access_ok(VERIFY_READ, src, size)) + return NULL; + return dma_memcpy(dst, src, size); } -EXPORT_SYMBOL(dma_insw); +EXPORT_SYMBOL(safe_dma_memcpy); -void dma_outsl(unsigned long addr, const void *buf, unsigned short len) +static void _dma_out(unsigned long addr, unsigned long buf, unsigned short len, + u16 size, u16 dma_size) { - unsigned long flags; - - local_irq_save(flags); - - blackfin_dcache_flush_range((unsigned int)buf, - (unsigned int)(buf) + len * sizeof(long)); - - bfin_write_MDMA_D0_START_ADDR(addr); - bfin_write_MDMA_D0_X_COUNT(len); - bfin_write_MDMA_D0_X_MODIFY(0); - bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); - - bfin_write_MDMA_S0_START_ADDR(buf); - bfin_write_MDMA_S0_X_COUNT(len); - bfin_write_MDMA_S0_X_MODIFY(4); - bfin_write_MDMA_S0_IRQ_STATUS(DMA_DONE | DMA_ERR); - - bfin_write_MDMA_S0_CONFIG(DMAEN | WDSIZE_32); - bfin_write_MDMA_D0_CONFIG(WNR | DI_EN | DMAEN | WDSIZE_32); - - SSYNC(); - - while (!(bfin_read_MDMA_D0_IRQ_STATUS() & DMA_DONE)); - - bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); - - bfin_write_MDMA_S0_CONFIG(0); - bfin_write_MDMA_D0_CONFIG(0); - local_irq_restore(flags); - + blackfin_dcache_flush_range(buf, buf + len * size); + __dma_memcpy(addr, 0, buf, size, len, dma_size); } -EXPORT_SYMBOL(dma_outsl); -void dma_insl(unsigned long addr, void *buf, unsigned short len) +static void _dma_in(unsigned long addr, unsigned long buf, unsigned short len, + u16 size, u16 dma_size) { - unsigned long flags; - - blackfin_dcache_invalidate_range((unsigned int)buf, - (unsigned int)(buf) + len * sizeof(long)); - - local_irq_save(flags); - - bfin_write_MDMA_D0_START_ADDR(buf); - bfin_write_MDMA_D0_X_COUNT(len); - bfin_write_MDMA_D0_X_MODIFY(4); - bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); - - bfin_write_MDMA_S0_START_ADDR(addr); - bfin_write_MDMA_S0_X_COUNT(len); - bfin_write_MDMA_S0_X_MODIFY(0); - bfin_write_MDMA_S0_IRQ_STATUS(DMA_DONE | DMA_ERR); - - bfin_write_MDMA_S0_CONFIG(DMAEN | WDSIZE_32); - bfin_write_MDMA_D0_CONFIG(WNR | DI_EN | DMAEN | WDSIZE_32); - - SSYNC(); - - while (!(bfin_read_MDMA_D0_IRQ_STATUS() & DMA_DONE)); - - bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); - - bfin_write_MDMA_S0_CONFIG(0); - bfin_write_MDMA_D0_CONFIG(0); - local_irq_restore(flags); - + blackfin_dcache_invalidate_range(buf, buf + len * size); + __dma_memcpy(buf, size, addr, 0, len, dma_size); } -EXPORT_SYMBOL(dma_insl); + +#define MAKE_DMA_IO(io, bwl, isize, dmasize, cnst) \ +void dma_##io##s##bwl(unsigned long addr, cnst void *buf, unsigned short len) \ +{ \ + _dma_##io(addr, (unsigned long)buf, len, isize, WDSIZE_##dmasize); \ +} \ +EXPORT_SYMBOL(dma_##io##s##bwl) +MAKE_DMA_IO(out, b, 1, 8, const); +MAKE_DMA_IO(in, b, 1, 8, ); +MAKE_DMA_IO(out, w, 2, 16, const); +MAKE_DMA_IO(in, w, 2, 16, ); +MAKE_DMA_IO(out, l, 4, 32, const); +MAKE_DMA_IO(in, l, 4, 32, ); diff --git a/arch/blackfin/kernel/bfin_gpio.c b/arch/blackfin/kernel/bfin_gpio.c index 5c0800adb4dd..4c14331978f6 100644 --- a/arch/blackfin/kernel/bfin_gpio.c +++ b/arch/blackfin/kernel/bfin_gpio.c @@ -119,28 +119,28 @@ enum { #define AWA_DUMMY_READ(...) do { } while (0) #endif -#ifdef BF533_FAMILY -static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = { +#if defined(BF533_FAMILY) || defined(BF538_FAMILY) +static struct gpio_port_t *gpio_bankb[] = { (struct gpio_port_t *) FIO_FLAG_D, }; #endif -#if defined(BF527_FAMILY) || defined(BF537_FAMILY) -static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = { +#if defined(BF527_FAMILY) || defined(BF537_FAMILY) || defined(BF518_FAMILY) +static struct gpio_port_t *gpio_bankb[] = { (struct gpio_port_t *) PORTFIO, (struct gpio_port_t *) PORTGIO, (struct gpio_port_t *) PORTHIO, }; -static unsigned short *port_fer[gpio_bank(MAX_BLACKFIN_GPIOS)] = { +static unsigned short *port_fer[] = { (unsigned short *) PORTF_FER, (unsigned short *) PORTG_FER, (unsigned short *) PORTH_FER, }; #endif -#ifdef BF527_FAMILY -static unsigned short *port_mux[gpio_bank(MAX_BLACKFIN_GPIOS)] = { +#if defined(BF527_FAMILY) || defined(BF518_FAMILY) +static unsigned short *port_mux[] = { (unsigned short *) PORTF_MUX, (unsigned short *) PORTG_MUX, (unsigned short *) PORTH_MUX, @@ -155,7 +155,7 @@ u8 pmux_offset[][16] = #endif #ifdef BF561_FAMILY -static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = { +static struct gpio_port_t *gpio_bankb[] = { (struct gpio_port_t *) FIO0_FLAG_D, (struct gpio_port_t *) FIO1_FLAG_D, (struct gpio_port_t *) FIO2_FLAG_D, @@ -163,7 +163,7 @@ static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = { #endif #ifdef BF548_FAMILY -static struct gpio_port_t *gpio_array[gpio_bank(MAX_BLACKFIN_GPIOS)] = { +static struct gpio_port_t *gpio_array[] = { (struct gpio_port_t *)PORTA_FER, (struct gpio_port_t *)PORTB_FER, (struct gpio_port_t *)PORTC_FER, @@ -177,8 +177,9 @@ static struct gpio_port_t *gpio_array[gpio_bank(MAX_BLACKFIN_GPIOS)] = { }; #endif -static unsigned short reserved_gpio_map[gpio_bank(MAX_BLACKFIN_GPIOS)]; +static unsigned short reserved_gpio_map[GPIO_BANK_NUM]; static unsigned short reserved_peri_map[gpio_bank(MAX_RESOURCES)]; +static unsigned short reserved_gpio_irq_map[GPIO_BANK_NUM]; #define RESOURCE_LABEL_SIZE 16 @@ -188,48 +189,46 @@ static struct str_ident { #if defined(CONFIG_PM) #if defined(CONFIG_BF54x) -static struct gpio_port_s gpio_bank_saved[gpio_bank(MAX_BLACKFIN_GPIOS)]; +static struct gpio_port_s gpio_bank_saved[GPIO_BANK_NUM]; #else -static unsigned short wakeup_map[gpio_bank(MAX_BLACKFIN_GPIOS)]; +static unsigned short wakeup_map[GPIO_BANK_NUM]; static unsigned char wakeup_flags_map[MAX_BLACKFIN_GPIOS]; -static struct gpio_port_s gpio_bank_saved[gpio_bank(MAX_BLACKFIN_GPIOS)]; +static struct gpio_port_s gpio_bank_saved[GPIO_BANK_NUM]; #ifdef BF533_FAMILY -static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG_INTB}; +static unsigned int sic_iwr_irqs[] = {IRQ_PROG_INTB}; #endif #ifdef BF537_FAMILY -static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG_INTB, IRQ_PORTG_INTB, IRQ_MAC_TX}; +static unsigned int sic_iwr_irqs[] = {IRQ_PROG_INTB, IRQ_PORTG_INTB, IRQ_MAC_TX}; +#endif + +#ifdef BF538_FAMILY +static unsigned int sic_iwr_irqs[] = {IRQ_PORTF_INTB}; #endif -#ifdef BF527_FAMILY -static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PORTF_INTB, IRQ_PORTG_INTB, IRQ_PORTH_INTB}; +#if defined(BF527_FAMILY) || defined(BF518_FAMILY) +static unsigned int sic_iwr_irqs[] = {IRQ_PORTF_INTB, IRQ_PORTG_INTB, IRQ_PORTH_INTB}; #endif #ifdef BF561_FAMILY -static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG0_INTB, IRQ_PROG1_INTB, IRQ_PROG2_INTB}; +static unsigned int sic_iwr_irqs[] = {IRQ_PROG0_INTB, IRQ_PROG1_INTB, IRQ_PROG2_INTB}; #endif #endif #endif /* CONFIG_PM */ -#if defined(BF548_FAMILY) inline int check_gpio(unsigned gpio) { +#if defined(BF548_FAMILY) if (gpio == GPIO_PB15 || gpio == GPIO_PC14 || gpio == GPIO_PC15 || gpio == GPIO_PH14 || gpio == GPIO_PH15 - || gpio == GPIO_PJ14 || gpio == GPIO_PJ15 - || gpio >= MAX_BLACKFIN_GPIOS) + || gpio == GPIO_PJ14 || gpio == GPIO_PJ15) return -EINVAL; - return 0; -} -#else -inline int check_gpio(unsigned gpio) -{ +#endif if (gpio >= MAX_BLACKFIN_GPIOS) return -EINVAL; return 0; } -#endif static void gpio_error(unsigned gpio) { @@ -258,35 +257,30 @@ static int cmp_label(unsigned short ident, const char *label) } if (label) - return strncmp(str_ident[ident].name, - label, strlen(label)); + return strcmp(str_ident[ident].name, label); else return -EINVAL; } -#if defined(BF527_FAMILY) || defined(BF537_FAMILY) static void port_setup(unsigned gpio, unsigned short usage) { - if (!check_gpio(gpio)) { - if (usage == GPIO_USAGE) - *port_fer[gpio_bank(gpio)] &= ~gpio_bit(gpio); - else - *port_fer[gpio_bank(gpio)] |= gpio_bit(gpio); - SSYNC(); - } -} + if (check_gpio(gpio)) + return; + +#if defined(BF527_FAMILY) || defined(BF537_FAMILY) || defined(BF518_FAMILY) + if (usage == GPIO_USAGE) + *port_fer[gpio_bank(gpio)] &= ~gpio_bit(gpio); + else + *port_fer[gpio_bank(gpio)] |= gpio_bit(gpio); + SSYNC(); #elif defined(BF548_FAMILY) -static void port_setup(unsigned gpio, unsigned short usage) -{ if (usage == GPIO_USAGE) gpio_array[gpio_bank(gpio)]->port_fer &= ~gpio_bit(gpio); else gpio_array[gpio_bank(gpio)]->port_fer |= gpio_bit(gpio); SSYNC(); -} -#else -# define port_setup(...) do { } while (0) #endif +} #ifdef BF537_FAMILY static struct { @@ -379,7 +373,7 @@ inline u16 get_portmux(unsigned short portno) return (pmux >> (2 * gpio_sub_n(portno)) & 0x3); } -#elif defined(BF527_FAMILY) +#elif defined(BF527_FAMILY) || defined(BF518_FAMILY) inline void portmux_setup(unsigned short portno, unsigned short function) { u16 pmux, ident = P_IDENT(portno); @@ -428,13 +422,13 @@ arch_initcall(bfin_gpio_init); void set_gpio_ ## name(unsigned gpio, unsigned short arg) \ { \ unsigned long flags; \ - local_irq_save(flags); \ + local_irq_save_hw(flags); \ if (arg) \ gpio_bankb[gpio_bank(gpio)]->name |= gpio_bit(gpio); \ else \ gpio_bankb[gpio_bank(gpio)]->name &= ~gpio_bit(gpio); \ AWA_DUMMY_READ(name); \ - local_irq_restore(flags); \ + local_irq_restore_hw(flags); \ } \ EXPORT_SYMBOL(set_gpio_ ## name); @@ -450,13 +444,13 @@ SET_GPIO(both) void set_gpio_ ## name(unsigned gpio, unsigned short arg) \ { \ unsigned long flags; \ - local_irq_save(flags); \ + local_irq_save_hw(flags); \ if (arg) \ gpio_bankb[gpio_bank(gpio)]->name ## _set = gpio_bit(gpio); \ else \ gpio_bankb[gpio_bank(gpio)]->name ## _clear = gpio_bit(gpio); \ AWA_DUMMY_READ(name); \ - local_irq_restore(flags); \ + local_irq_restore_hw(flags); \ } \ EXPORT_SYMBOL(set_gpio_ ## name); #else @@ -479,10 +473,10 @@ SET_GPIO_SC(data) void set_gpio_toggle(unsigned gpio) { unsigned long flags; - local_irq_save(flags); + local_irq_save_hw(flags); gpio_bankb[gpio_bank(gpio)]->toggle = gpio_bit(gpio); AWA_DUMMY_READ(toggle); - local_irq_restore(flags); + local_irq_restore_hw(flags); } #else void set_gpio_toggle(unsigned gpio) @@ -500,10 +494,10 @@ EXPORT_SYMBOL(set_gpio_toggle); void set_gpiop_ ## name(unsigned gpio, unsigned short arg) \ { \ unsigned long flags; \ - local_irq_save(flags); \ + local_irq_save_hw(flags); \ gpio_bankb[gpio_bank(gpio)]->name = arg; \ AWA_DUMMY_READ(name); \ - local_irq_restore(flags); \ + local_irq_restore_hw(flags); \ } \ EXPORT_SYMBOL(set_gpiop_ ## name); #else @@ -531,10 +525,10 @@ unsigned short get_gpio_ ## name(unsigned gpio) \ { \ unsigned long flags; \ unsigned short ret; \ - local_irq_save(flags); \ + local_irq_save_hw(flags); \ ret = 0x01 & (gpio_bankb[gpio_bank(gpio)]->name >> gpio_sub_n(gpio)); \ AWA_DUMMY_READ(name); \ - local_irq_restore(flags); \ + local_irq_restore_hw(flags); \ return ret; \ } \ EXPORT_SYMBOL(get_gpio_ ## name); @@ -564,10 +558,10 @@ unsigned short get_gpiop_ ## name(unsigned gpio) \ { \ unsigned long flags; \ unsigned short ret; \ - local_irq_save(flags); \ + local_irq_save_hw(flags); \ ret = (gpio_bankb[gpio_bank(gpio)]->name); \ AWA_DUMMY_READ(name); \ - local_irq_restore(flags); \ + local_irq_restore_hw(flags); \ return ret; \ } \ EXPORT_SYMBOL(get_gpiop_ ## name); @@ -617,10 +611,10 @@ int gpio_pm_wakeup_request(unsigned gpio, unsigned char type) if ((check_gpio(gpio) < 0) || !type) return -EINVAL; - local_irq_save(flags); + local_irq_save_hw(flags); wakeup_map[gpio_bank(gpio)] |= gpio_bit(gpio); wakeup_flags_map[gpio] = type; - local_irq_restore(flags); + local_irq_restore_hw(flags); return 0; } @@ -633,11 +627,11 @@ void gpio_pm_wakeup_free(unsigned gpio) if (check_gpio(gpio) < 0) return; - local_irq_save(flags); + local_irq_save_hw(flags); wakeup_map[gpio_bank(gpio)] &= ~gpio_bit(gpio); - local_irq_restore(flags); + local_irq_restore_hw(flags); } EXPORT_SYMBOL(gpio_pm_wakeup_free); @@ -679,7 +673,7 @@ u32 bfin_pm_standby_setup(void) gpio_bankb[bank]->maskb = 0; if (mask) { -#if defined(BF527_FAMILY) || defined(BF537_FAMILY) +#if defined(BF527_FAMILY) || defined(BF537_FAMILY) || defined(BF518_FAMILY) gpio_bank_saved[bank].fer = *port_fer[bank]; #endif gpio_bank_saved[bank].inen = gpio_bankb[bank]->inen; @@ -724,7 +718,7 @@ void bfin_pm_standby_restore(void) bank = gpio_bank(i); if (mask) { -#if defined(BF527_FAMILY) || defined(BF537_FAMILY) +#if defined(BF527_FAMILY) || defined(BF537_FAMILY) || defined(BF518_FAMILY) *port_fer[bank] = gpio_bank_saved[bank].fer; #endif gpio_bankb[bank]->inen = gpio_bank_saved[bank].inen; @@ -750,9 +744,9 @@ void bfin_gpio_pm_hibernate_suspend(void) for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) { bank = gpio_bank(i); -#if defined(BF527_FAMILY) || defined(BF537_FAMILY) +#if defined(BF527_FAMILY) || defined(BF537_FAMILY) || defined(BF518_FAMILY) gpio_bank_saved[bank].fer = *port_fer[bank]; -#ifdef BF527_FAMILY +#if defined(BF527_FAMILY) || defined(BF518_FAMILY) gpio_bank_saved[bank].mux = *port_mux[bank]; #else if (bank == 0) @@ -778,8 +772,8 @@ void bfin_gpio_pm_hibernate_restore(void) for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) { bank = gpio_bank(i); -#if defined(BF527_FAMILY) || defined(BF537_FAMILY) -#ifdef BF527_FAMILY +#if defined(BF527_FAMILY) || defined(BF537_FAMILY) || defined(BF518_FAMILY) +#if defined(BF527_FAMILY) || defined(BF518_FAMILY) *port_mux[bank] = gpio_bank_saved[bank].mux; #else if (bank == 0) @@ -873,7 +867,6 @@ EXPORT_SYMBOL(get_gpio_dir); * MODIFICATION HISTORY : **************************************************************/ -#ifdef BF548_FAMILY int peripheral_request(unsigned short per, const char *label) { unsigned long flags; @@ -889,31 +882,35 @@ int peripheral_request(unsigned short per, const char *label) if (!(per & P_DEFINED)) return -ENODEV; - if (check_gpio(ident) < 0) - return -EINVAL; + local_irq_save_hw(flags); - local_irq_save(flags); - - if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) { + /* If a pin can be muxed as either GPIO or peripheral, make + * sure it is not already a GPIO pin when we request it. + */ + if (unlikely(!check_gpio(ident) && + reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) { dump_stack(); printk(KERN_ERR - "%s: Peripheral %d is already reserved as GPIO by %s !\n", + "%s: Peripheral %d is already reserved as GPIO by %s !\n", __func__, ident, get_label(ident)); - local_irq_restore(flags); + local_irq_restore_hw(flags); return -EBUSY; } if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) { - u16 funct = get_portmux(ident); - /* * Pin functions like AMC address strobes my * be requested and used by several drivers */ - if (!((per & P_MAYSHARE) && (funct == P_FUNCT2MUX(per)))) { +#ifdef BF548_FAMILY + u16 funct = get_portmux(ident); + if (!((per & P_MAYSHARE) && (funct == P_FUNCT2MUX(per)))) { +#else + if (!(per & P_MAYSHARE)) { +#endif /* * Allow that the identical pin function can * be requested from the same driver twice @@ -926,7 +923,7 @@ int peripheral_request(unsigned short per, const char *label) printk(KERN_ERR "%s: Peripheral %d function %d is already reserved by %s !\n", __func__, ident, P_FUNCT2MUX(per), get_label(ident)); - local_irq_restore(flags); + local_irq_restore_hw(flags); return -EBUSY; } } @@ -934,89 +931,19 @@ int peripheral_request(unsigned short per, const char *label) anyway: reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident); +#ifdef BF548_FAMILY portmux_setup(ident, P_FUNCT2MUX(per)); - port_setup(ident, PERIPHERAL_USAGE); - - local_irq_restore(flags); - set_label(ident, label); - - return 0; -} -EXPORT_SYMBOL(peripheral_request); #else - -int peripheral_request(unsigned short per, const char *label) -{ - unsigned long flags; - unsigned short ident = P_IDENT(per); - - /* - * Don't cares are pins with only one dedicated function - */ - - if (per & P_DONTCARE) - return 0; - - if (!(per & P_DEFINED)) - return -ENODEV; - - local_irq_save(flags); - - if (!check_gpio(ident)) { - - if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) { - dump_stack(); - printk(KERN_ERR - "%s: Peripheral %d is already reserved as GPIO by %s !\n", - __func__, ident, get_label(ident)); - local_irq_restore(flags); - return -EBUSY; - } - - } - - if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) { - - /* - * Pin functions like AMC address strobes my - * be requested and used by several drivers - */ - - if (!(per & P_MAYSHARE)) { - - /* - * Allow that the identical pin function can - * be requested from the same driver twice - */ - - if (cmp_label(ident, label) == 0) - goto anyway; - - dump_stack(); - printk(KERN_ERR - "%s: Peripheral %d function %d is already" - " reserved by %s !\n", - __func__, ident, P_FUNCT2MUX(per), - get_label(ident)); - local_irq_restore(flags); - return -EBUSY; - } - - } - - anyway: portmux_setup(per, P_FUNCT2MUX(per)); - +#endif port_setup(ident, PERIPHERAL_USAGE); - reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident); - local_irq_restore(flags); + local_irq_restore_hw(flags); set_label(ident, label); return 0; } EXPORT_SYMBOL(peripheral_request); -#endif int peripheral_request_list(const unsigned short per[], const char *label) { @@ -1053,10 +980,10 @@ void peripheral_free(unsigned short per) if (check_gpio(ident) < 0) return; - local_irq_save(flags); + local_irq_save_hw(flags); if (unlikely(!(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident)))) { - local_irq_restore(flags); + local_irq_restore_hw(flags); return; } @@ -1067,7 +994,7 @@ void peripheral_free(unsigned short per) set_label(ident, "free"); - local_irq_restore(flags); + local_irq_restore_hw(flags); } EXPORT_SYMBOL(peripheral_free); @@ -1094,14 +1021,14 @@ EXPORT_SYMBOL(peripheral_free_list); * MODIFICATION HISTORY : **************************************************************/ -int gpio_request(unsigned gpio, const char *label) +int bfin_gpio_request(unsigned gpio, const char *label) { unsigned long flags; if (check_gpio(gpio) < 0) return -EINVAL; - local_irq_save(flags); + local_irq_save_hw(flags); /* * Allow that the identical GPIO can @@ -1110,15 +1037,15 @@ int gpio_request(unsigned gpio, const char *label) */ if (cmp_label(gpio, label) == 0) { - local_irq_restore(flags); + local_irq_restore_hw(flags); return 0; } if (unlikely(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) { dump_stack(); printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved by %s !\n", - gpio, get_label(gpio)); - local_irq_restore(flags); + gpio, get_label(gpio)); + local_irq_restore_hw(flags); return -EBUSY; } if (unlikely(reserved_peri_map[gpio_bank(gpio)] & gpio_bit(gpio))) { @@ -1126,34 +1053,37 @@ int gpio_request(unsigned gpio, const char *label) printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n", gpio, get_label(gpio)); - local_irq_restore(flags); + local_irq_restore_hw(flags); return -EBUSY; } + if (unlikely(reserved_gpio_irq_map[gpio_bank(gpio)] & gpio_bit(gpio))) + printk(KERN_NOTICE "bfin-gpio: GPIO %d is already reserved as gpio-irq!" + " (Documentation/blackfin/bfin-gpio-notes.txt)\n", gpio); reserved_gpio_map[gpio_bank(gpio)] |= gpio_bit(gpio); + set_label(gpio, label); - local_irq_restore(flags); + local_irq_restore_hw(flags); port_setup(gpio, GPIO_USAGE); - set_label(gpio, label); return 0; } -EXPORT_SYMBOL(gpio_request); +EXPORT_SYMBOL(bfin_gpio_request); -void gpio_free(unsigned gpio) +void bfin_gpio_free(unsigned gpio) { unsigned long flags; if (check_gpio(gpio) < 0) return; - local_irq_save(flags); + local_irq_save_hw(flags); if (unlikely(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)))) { dump_stack(); gpio_error(gpio); - local_irq_restore(flags); + local_irq_restore_hw(flags); return; } @@ -1161,13 +1091,76 @@ void gpio_free(unsigned gpio) set_label(gpio, "free"); - local_irq_restore(flags); + local_irq_restore_hw(flags); +} +EXPORT_SYMBOL(bfin_gpio_free); + +int bfin_gpio_irq_request(unsigned gpio, const char *label) +{ + unsigned long flags; + + if (check_gpio(gpio) < 0) + return -EINVAL; + + local_irq_save_hw(flags); + + if (unlikely(reserved_gpio_irq_map[gpio_bank(gpio)] & gpio_bit(gpio))) { + dump_stack(); + printk(KERN_ERR + "bfin-gpio: GPIO %d is already reserved as gpio-irq !\n", + gpio); + local_irq_restore_hw(flags); + return -EBUSY; + } + if (unlikely(reserved_peri_map[gpio_bank(gpio)] & gpio_bit(gpio))) { + dump_stack(); + printk(KERN_ERR + "bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n", + gpio, get_label(gpio)); + local_irq_restore_hw(flags); + return -EBUSY; + } + if (unlikely(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) + printk(KERN_NOTICE "bfin-gpio: GPIO %d is already reserved by %s! " + "(Documentation/blackfin/bfin-gpio-notes.txt)\n", + gpio, get_label(gpio)); + + reserved_gpio_irq_map[gpio_bank(gpio)] |= gpio_bit(gpio); + set_label(gpio, label); + + local_irq_restore_hw(flags); + + port_setup(gpio, GPIO_USAGE); + + return 0; +} + +void bfin_gpio_irq_free(unsigned gpio) +{ + unsigned long flags; + + if (check_gpio(gpio) < 0) + return; + + local_irq_save_hw(flags); + + if (unlikely(!(reserved_gpio_irq_map[gpio_bank(gpio)] & gpio_bit(gpio)))) { + dump_stack(); + gpio_error(gpio); + local_irq_restore_hw(flags); + return; + } + + reserved_gpio_irq_map[gpio_bank(gpio)] &= ~gpio_bit(gpio); + + set_label(gpio, "free"); + + local_irq_restore_hw(flags); } -EXPORT_SYMBOL(gpio_free); #ifdef BF548_FAMILY -int gpio_direction_input(unsigned gpio) +int bfin_gpio_direction_input(unsigned gpio) { unsigned long flags; @@ -1176,16 +1169,16 @@ int gpio_direction_input(unsigned gpio) return -EINVAL; } - local_irq_save(flags); + local_irq_save_hw(flags); gpio_array[gpio_bank(gpio)]->port_dir_clear = gpio_bit(gpio); gpio_array[gpio_bank(gpio)]->port_inen |= gpio_bit(gpio); - local_irq_restore(flags); + local_irq_restore_hw(flags); return 0; } -EXPORT_SYMBOL(gpio_direction_input); +EXPORT_SYMBOL(bfin_gpio_direction_input); -int gpio_direction_output(unsigned gpio, int value) +int bfin_gpio_direction_output(unsigned gpio, int value) { unsigned long flags; @@ -1194,30 +1187,30 @@ int gpio_direction_output(unsigned gpio, int value) return -EINVAL; } - local_irq_save(flags); + local_irq_save_hw(flags); gpio_array[gpio_bank(gpio)]->port_inen &= ~gpio_bit(gpio); gpio_set_value(gpio, value); gpio_array[gpio_bank(gpio)]->port_dir_set = gpio_bit(gpio); - local_irq_restore(flags); + local_irq_restore_hw(flags); return 0; } -EXPORT_SYMBOL(gpio_direction_output); +EXPORT_SYMBOL(bfin_gpio_direction_output); -void gpio_set_value(unsigned gpio, int arg) +void bfin_gpio_set_value(unsigned gpio, int arg) { if (arg) gpio_array[gpio_bank(gpio)]->port_set = gpio_bit(gpio); else gpio_array[gpio_bank(gpio)]->port_clear = gpio_bit(gpio); } -EXPORT_SYMBOL(gpio_set_value); +EXPORT_SYMBOL(bfin_gpio_set_value); -int gpio_get_value(unsigned gpio) +int bfin_gpio_get_value(unsigned gpio) { return (1 & (gpio_array[gpio_bank(gpio)]->port_data >> gpio_sub_n(gpio))); } -EXPORT_SYMBOL(gpio_get_value); +EXPORT_SYMBOL(bfin_gpio_get_value); void bfin_gpio_irq_prepare(unsigned gpio) { @@ -1225,34 +1218,34 @@ void bfin_gpio_irq_prepare(unsigned gpio) port_setup(gpio, GPIO_USAGE); - local_irq_save(flags); + local_irq_save_hw(flags); gpio_array[gpio_bank(gpio)]->port_dir_clear = gpio_bit(gpio); gpio_array[gpio_bank(gpio)]->port_inen |= gpio_bit(gpio); - local_irq_restore(flags); + local_irq_restore_hw(flags); } #else -int gpio_get_value(unsigned gpio) +int bfin_gpio_get_value(unsigned gpio) { unsigned long flags; int ret; if (unlikely(get_gpio_edge(gpio))) { - local_irq_save(flags); + local_irq_save_hw(flags); set_gpio_edge(gpio, 0); ret = get_gpio_data(gpio); set_gpio_edge(gpio, 1); - local_irq_restore(flags); + local_irq_restore_hw(flags); return ret; } else return get_gpio_data(gpio); } -EXPORT_SYMBOL(gpio_get_value); +EXPORT_SYMBOL(bfin_gpio_get_value); -int gpio_direction_input(unsigned gpio) +int bfin_gpio_direction_input(unsigned gpio) { unsigned long flags; @@ -1261,17 +1254,17 @@ int gpio_direction_input(unsigned gpio) return -EINVAL; } - local_irq_save(flags); + local_irq_save_hw(flags); gpio_bankb[gpio_bank(gpio)]->dir &= ~gpio_bit(gpio); gpio_bankb[gpio_bank(gpio)]->inen |= gpio_bit(gpio); AWA_DUMMY_READ(inen); - local_irq_restore(flags); + local_irq_restore_hw(flags); return 0; } -EXPORT_SYMBOL(gpio_direction_input); +EXPORT_SYMBOL(bfin_gpio_direction_input); -int gpio_direction_output(unsigned gpio, int value) +int bfin_gpio_direction_output(unsigned gpio, int value) { unsigned long flags; @@ -1280,7 +1273,7 @@ int gpio_direction_output(unsigned gpio, int value) return -EINVAL; } - local_irq_save(flags); + local_irq_save_hw(flags); gpio_bankb[gpio_bank(gpio)]->inen &= ~gpio_bit(gpio); if (value) @@ -1290,11 +1283,11 @@ int gpio_direction_output(unsigned gpio, int value) gpio_bankb[gpio_bank(gpio)]->dir |= gpio_bit(gpio); AWA_DUMMY_READ(dir); - local_irq_restore(flags); + local_irq_restore_hw(flags); return 0; } -EXPORT_SYMBOL(gpio_direction_output); +EXPORT_SYMBOL(bfin_gpio_direction_output); /* If we are booting from SPI and our board lacks a strong enough pull up, * the core can reset and execute the bootrom faster than the resistor can @@ -1327,14 +1320,17 @@ void bfin_gpio_irq_prepare(unsigned gpio) static int gpio_proc_read(char *buf, char **start, off_t offset, int len, int *unused_i, void *unused_v) { - int c, outlen = 0; + int c, irq, gpio, outlen = 0; for (c = 0; c < MAX_RESOURCES; c++) { - if (!check_gpio(c) && (reserved_gpio_map[gpio_bank(c)] & gpio_bit(c))) - len = sprintf(buf, "GPIO_%d: %s \t\tGPIO %s\n", c, - get_label(c), get_gpio_dir(c) ? "OUTPUT" : "INPUT"); + irq = reserved_gpio_irq_map[gpio_bank(c)] & gpio_bit(c); + gpio = reserved_gpio_map[gpio_bank(c)] & gpio_bit(c); + if (!check_gpio(c) && (gpio || irq)) + len = sprintf(buf, "GPIO_%d: \t%s%s \t\tGPIO %s\n", c, + get_label(c), (gpio && irq) ? " *" : "", + get_gpio_dir(c) ? "OUTPUT" : "INPUT"); else if (reserved_peri_map[gpio_bank(c)] & gpio_bit(c)) - len = sprintf(buf, "GPIO_%d: %s \t\tPeripheral\n", c, get_label(c)); + len = sprintf(buf, "GPIO_%d: \t%s \t\tPeripheral\n", c, get_label(c)); else continue; buf += len; @@ -1354,3 +1350,57 @@ static __init int gpio_register_proc(void) } __initcall(gpio_register_proc); #endif + +#ifdef CONFIG_GPIOLIB +int bfin_gpiolib_direction_input(struct gpio_chip *chip, unsigned gpio) +{ + return bfin_gpio_direction_input(gpio); +} + +int bfin_gpiolib_direction_output(struct gpio_chip *chip, unsigned gpio, int level) +{ + return bfin_gpio_direction_output(gpio, level); +} + +int bfin_gpiolib_get_value(struct gpio_chip *chip, unsigned gpio) +{ + return bfin_gpio_get_value(gpio); +} + +void bfin_gpiolib_set_value(struct gpio_chip *chip, unsigned gpio, int value) +{ +#ifdef BF548_FAMILY + return bfin_gpio_set_value(gpio, value); +#else + return set_gpio_data(gpio, value); +#endif +} + +int bfin_gpiolib_gpio_request(struct gpio_chip *chip, unsigned gpio) +{ + return bfin_gpio_request(gpio, chip->label); +} + +void bfin_gpiolib_gpio_free(struct gpio_chip *chip, unsigned gpio) +{ + return bfin_gpio_free(gpio); +} + +static struct gpio_chip bfin_chip = { + .label = "Blackfin-GPIOlib", + .direction_input = bfin_gpiolib_direction_input, + .get = bfin_gpiolib_get_value, + .direction_output = bfin_gpiolib_direction_output, + .set = bfin_gpiolib_set_value, + .request = bfin_gpiolib_gpio_request, + .free = bfin_gpiolib_gpio_free, + .base = 0, + .ngpio = MAX_BLACKFIN_GPIOS, +}; + +static int __init bfin_gpiolib_setup(void) +{ + return gpiochip_add(&bfin_chip); +} +arch_initcall(bfin_gpiolib_setup); +#endif diff --git a/arch/blackfin/kernel/bfin_ksyms.c b/arch/blackfin/kernel/bfin_ksyms.c index 4367330909b2..01f917d58b59 100644 --- a/arch/blackfin/kernel/bfin_ksyms.c +++ b/arch/blackfin/kernel/bfin_ksyms.c @@ -1,52 +1,25 @@ /* - * File: arch/blackfin/kernel/bfin_ksyms.c - * Based on: none - original work - * Author: + * arch/blackfin/kernel/bfin_ksyms.c - exports for random symbols * - * Created: - * Description: + * Copyright 2004-2008 Analog Devices Inc. * - * Modified: - * Copyright 2004-2006 Analog Devices Inc. - * - * Bugs: Enter bugs at http://blackfin.uclinux.org/ - * - * 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. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see the file COPYING, or write - * to the Free Software Foundation, Inc., - * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * Licensed under the GPL-2 or later. */ #include <linux/module.h> -#include <linux/irq.h> #include <linux/uaccess.h> -#include <asm/checksum.h> #include <asm/cacheflush.h> -/* platform dependent support */ - -EXPORT_SYMBOL(__ioremap); - -EXPORT_SYMBOL(ip_fast_csum); - -EXPORT_SYMBOL(kernel_thread); - -EXPORT_SYMBOL(is_in_rom); +/* Allow people to have their own Blackfin exception handler in a module */ EXPORT_SYMBOL(bfin_return_from_exception); -/* Networking helper routines. */ -EXPORT_SYMBOL(csum_partial_copy); +/* All the Blackfin cache functions: mach-common/cache.S */ +EXPORT_SYMBOL(blackfin_dcache_invalidate_range); +EXPORT_SYMBOL(blackfin_icache_dcache_flush_range); +EXPORT_SYMBOL(blackfin_icache_flush_range); +EXPORT_SYMBOL(blackfin_dcache_flush_range); +EXPORT_SYMBOL(blackfin_dflush_page); /* The following are special because they're not called * explicitly (the C compiler generates them). Fortunately, @@ -74,8 +47,6 @@ extern void __modsi3(void); extern void __muldi3(void); extern void __udivsi3(void); extern void __umodsi3(void); - -/* gcc lib functions */ EXPORT_SYMBOL(__ashldi3); EXPORT_SYMBOL(__ashrdi3); EXPORT_SYMBOL(__umulsi3_highpart); @@ -87,6 +58,7 @@ EXPORT_SYMBOL(__muldi3); EXPORT_SYMBOL(__udivsi3); EXPORT_SYMBOL(__umodsi3); +/* Input/output symbols: lib/{in,out}s.S */ EXPORT_SYMBOL(outsb); EXPORT_SYMBOL(insb); EXPORT_SYMBOL(outsw); @@ -96,20 +68,39 @@ EXPORT_SYMBOL(insw_8); EXPORT_SYMBOL(outsl); EXPORT_SYMBOL(insl); EXPORT_SYMBOL(insl_16); -EXPORT_SYMBOL(irq_flags); -EXPORT_SYMBOL(iounmap); -EXPORT_SYMBOL(blackfin_dcache_invalidate_range); -EXPORT_SYMBOL(blackfin_icache_dcache_flush_range); -EXPORT_SYMBOL(blackfin_icache_flush_range); -EXPORT_SYMBOL(blackfin_dcache_flush_range); -EXPORT_SYMBOL(blackfin_dflush_page); -EXPORT_SYMBOL(csum_partial); -EXPORT_SYMBOL(__init_begin); -EXPORT_SYMBOL(__init_end); -EXPORT_SYMBOL(_ebss_l1); -EXPORT_SYMBOL(_stext_l1); -EXPORT_SYMBOL(_etext_l1); -EXPORT_SYMBOL(_sdata_l1); -EXPORT_SYMBOL(_ebss_b_l1); -EXPORT_SYMBOL(_sdata_b_l1); +#ifdef CONFIG_SMP +EXPORT_SYMBOL(__raw_atomic_update_asm); +EXPORT_SYMBOL(__raw_atomic_clear_asm); +EXPORT_SYMBOL(__raw_atomic_set_asm); +EXPORT_SYMBOL(__raw_atomic_xor_asm); +EXPORT_SYMBOL(__raw_atomic_test_asm); +EXPORT_SYMBOL(__raw_xchg_1_asm); +EXPORT_SYMBOL(__raw_xchg_2_asm); +EXPORT_SYMBOL(__raw_xchg_4_asm); +EXPORT_SYMBOL(__raw_cmpxchg_1_asm); +EXPORT_SYMBOL(__raw_cmpxchg_2_asm); +EXPORT_SYMBOL(__raw_cmpxchg_4_asm); +EXPORT_SYMBOL(__raw_spin_is_locked_asm); +EXPORT_SYMBOL(__raw_spin_lock_asm); +EXPORT_SYMBOL(__raw_spin_trylock_asm); +EXPORT_SYMBOL(__raw_spin_unlock_asm); +EXPORT_SYMBOL(__raw_read_lock_asm); +EXPORT_SYMBOL(__raw_read_trylock_asm); +EXPORT_SYMBOL(__raw_read_unlock_asm); +EXPORT_SYMBOL(__raw_write_lock_asm); +EXPORT_SYMBOL(__raw_write_trylock_asm); +EXPORT_SYMBOL(__raw_write_unlock_asm); +EXPORT_SYMBOL(__raw_bit_set_asm); +EXPORT_SYMBOL(__raw_bit_clear_asm); +EXPORT_SYMBOL(__raw_bit_toggle_asm); +EXPORT_SYMBOL(__raw_bit_test_asm); +EXPORT_SYMBOL(__raw_bit_test_set_asm); +EXPORT_SYMBOL(__raw_bit_test_clear_asm); +EXPORT_SYMBOL(__raw_bit_test_toggle_asm); +EXPORT_SYMBOL(__raw_uncached_fetch_asm); +#ifdef __ARCH_SYNC_CORE_DCACHE +EXPORT_SYMBOL(__raw_smp_mark_barrier_asm); +EXPORT_SYMBOL(__raw_smp_check_barrier_asm); +#endif +#endif diff --git a/arch/blackfin/kernel/cplb-mpu/Makefile b/arch/blackfin/kernel/cplb-mpu/Makefile index 286b69357f97..7d70d3bf3212 100644 --- a/arch/blackfin/kernel/cplb-mpu/Makefile +++ b/arch/blackfin/kernel/cplb-mpu/Makefile @@ -4,5 +4,7 @@ obj-y := cplbinit.o cacheinit.o cplbmgr.o -obj-$(CONFIG_CPLB_INFO) += cplbinfo.o - +CFLAGS_cplbmgr.o := -ffixed-I0 -ffixed-I1 -ffixed-I2 -ffixed-I3 \ + -ffixed-L0 -ffixed-L1 -ffixed-L2 -ffixed-L3 \ + -ffixed-M0 -ffixed-M1 -ffixed-M2 -ffixed-M3 \ + -ffixed-B0 -ffixed-B1 -ffixed-B2 -ffixed-B3 diff --git a/arch/blackfin/kernel/cplb-mpu/cacheinit.c b/arch/blackfin/kernel/cplb-mpu/cacheinit.c index a8b712a24c59..c6ff947f9d37 100644 --- a/arch/blackfin/kernel/cplb-mpu/cacheinit.c +++ b/arch/blackfin/kernel/cplb-mpu/cacheinit.c @@ -25,7 +25,7 @@ #include <asm/cplbinit.h> #if defined(CONFIG_BFIN_ICACHE) -void __init bfin_icache_init(void) +void __cpuinit bfin_icache_init(struct cplb_entry *icplb_tbl) { unsigned long ctrl; int i; @@ -43,7 +43,7 @@ void __init bfin_icache_init(void) #endif #if defined(CONFIG_BFIN_DCACHE) -void __init bfin_dcache_init(void) +void __cpuinit bfin_dcache_init(struct cplb_entry *dcplb_tbl) { unsigned long ctrl; int i; diff --git a/arch/blackfin/kernel/cplb-mpu/cplbinfo.c b/arch/blackfin/kernel/cplb-mpu/cplbinfo.c deleted file mode 100644 index 822beefa3a4b..000000000000 --- a/arch/blackfin/kernel/cplb-mpu/cplbinfo.c +++ /dev/null @@ -1,136 +0,0 @@ -/* - * File: arch/blackfin/mach-common/cplbinfo.c - * Based on: - * Author: Sonic Zhang <sonic.zhang@analog.com> - * - * Created: Jan. 2005 - * Description: Display CPLB status - * - * Modified: - * Copyright 2004-2006 Analog Devices Inc. - * - * Bugs: Enter bugs at http://blackfin.uclinux.org/ - * - * 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. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see the file COPYING, or write - * to the Free Software Foundation, Inc., - * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/proc_fs.h> -#include <linux/uaccess.h> - -#include <asm/current.h> -#include <asm/system.h> -#include <asm/cplb.h> -#include <asm/cplbinit.h> -#include <asm/blackfin.h> - -static char page_size_string_table[][4] = { "1K", "4K", "1M", "4M" }; - -static char *cplb_print_entry(char *buf, struct cplb_entry *tbl, int switched) -{ - int i; - buf += sprintf(buf, "Index\tAddress\t\tData\tSize\tU/RD\tU/WR\tS/WR\tSwitch\n"); - for (i = 0; i < MAX_CPLBS; i++) { - unsigned long data = tbl[i].data; - unsigned long addr = tbl[i].addr; - if (!(data & CPLB_VALID)) - continue; - - buf += - sprintf(buf, - "%d\t0x%08lx\t%06lx\t%s\t%c\t%c\t%c\t%c\n", - i, addr, data, - page_size_string_table[(data & 0x30000) >> 16], - (data & CPLB_USER_RD) ? 'Y' : 'N', - (data & CPLB_USER_WR) ? 'Y' : 'N', - (data & CPLB_SUPV_WR) ? 'Y' : 'N', - i < switched ? 'N' : 'Y'); - } - buf += sprintf(buf, "\n"); - - return buf; -} - -int cplbinfo_proc_output(char *buf) -{ - char *p; - - p = buf; - - p += sprintf(p, "------------------ CPLB Information ------------------\n\n"); - - if (bfin_read_IMEM_CONTROL() & ENICPLB) { - p += sprintf(p, "Instruction CPLB entry:\n"); - p = cplb_print_entry(p, icplb_tbl, first_switched_icplb); - } else - p += sprintf(p, "Instruction CPLB is disabled.\n\n"); - - if (1 || bfin_read_DMEM_CONTROL() & ENDCPLB) { - p += sprintf(p, "Data CPLB entry:\n"); - p = cplb_print_entry(p, dcplb_tbl, first_switched_dcplb); - } else - p += sprintf(p, "Data CPLB is disabled.\n"); - - p += sprintf(p, "ICPLB miss: %d\nICPLB supervisor miss: %d\n", - nr_icplb_miss, nr_icplb_supv_miss); - p += sprintf(p, "DCPLB miss: %d\nDCPLB protection fault:%d\n", - nr_dcplb_miss, nr_dcplb_prot); - p += sprintf(p, "CPLB flushes: %d\n", - nr_cplb_flush); - - return p - buf; -} - -static int cplbinfo_read_proc(char *page, char **start, off_t off, - int count, int *eof, void *data) -{ - int len; - - len = cplbinfo_proc_output(page); - if (len <= off + count) - *eof = 1; - *start = page + off; - len -= off; - if (len > count) - len = count; - if (len < 0) - len = 0; - return len; -} - -static int __init cplbinfo_init(void) -{ - struct proc_dir_entry *entry; - - entry = create_proc_entry("cplbinfo", 0, NULL); - if (!entry) - return -ENOMEM; - - entry->read_proc = cplbinfo_read_proc; - entry->data = NULL; - - return 0; -} - -static void __exit cplbinfo_exit(void) -{ - remove_proc_entry("cplbinfo", NULL); -} - -module_init(cplbinfo_init); -module_exit(cplbinfo_exit); diff --git a/arch/blackfin/kernel/cplb-mpu/cplbinit.c b/arch/blackfin/kernel/cplb-mpu/cplbinit.c index 55af729f8495..bdb958486e76 100644 --- a/arch/blackfin/kernel/cplb-mpu/cplbinit.c +++ b/arch/blackfin/kernel/cplb-mpu/cplbinit.c @@ -25,18 +25,19 @@ #include <asm/blackfin.h> #include <asm/cplb.h> #include <asm/cplbinit.h> +#include <asm/mem_map.h> #if ANOMALY_05000263 # error the MPU will not function safely while Anomaly 05000263 applies #endif -struct cplb_entry icplb_tbl[MAX_CPLBS]; -struct cplb_entry dcplb_tbl[MAX_CPLBS]; +struct cplb_entry icplb_tbl[NR_CPUS][MAX_CPLBS]; +struct cplb_entry dcplb_tbl[NR_CPUS][MAX_CPLBS]; int first_switched_icplb, first_switched_dcplb; int first_mask_dcplb; -void __init generate_cplb_tables(void) +void __init generate_cplb_tables_cpu(unsigned int cpu) { int i_d, i_i; unsigned long addr; @@ -55,15 +56,16 @@ void __init generate_cplb_tables(void) d_cache |= CPLB_L1_AOW | CPLB_WT; #endif #endif + i_d = i_i = 0; /* Set up the zero page. */ - dcplb_tbl[i_d].addr = 0; - dcplb_tbl[i_d++].data = SDRAM_OOPS | PAGE_SIZE_1KB; + dcplb_tbl[cpu][i_d].addr = 0; + dcplb_tbl[cpu][i_d++].data = SDRAM_OOPS | PAGE_SIZE_1KB; #if 0 - icplb_tbl[i_i].addr = 0; - icplb_tbl[i_i++].data = i_cache | CPLB_USER_RD | PAGE_SIZE_4KB; + icplb_tbl[cpu][i_i].addr = 0; + icplb_tbl[cpu][i_i++].data = i_cache | CPLB_USER_RD | PAGE_SIZE_4KB; #endif /* Cover kernel memory with 4M pages. */ @@ -72,28 +74,28 @@ void __init generate_cplb_tables(void) i_data = i_cache | CPLB_VALID | CPLB_PORTPRIO | PAGE_SIZE_4MB; for (; addr < memory_start; addr += 4 * 1024 * 1024) { - dcplb_tbl[i_d].addr = addr; - dcplb_tbl[i_d++].data = d_data; - icplb_tbl[i_i].addr = addr; - icplb_tbl[i_i++].data = i_data | (addr == 0 ? CPLB_USER_RD : 0); + dcplb_tbl[cpu][i_d].addr = addr; + dcplb_tbl[cpu][i_d++].data = d_data; + icplb_tbl[cpu][i_i].addr = addr; + icplb_tbl[cpu][i_i++].data = i_data | (addr == 0 ? CPLB_USER_RD : 0); } /* Cover L1 memory. One 4M area for code and data each is enough. */ #if L1_DATA_A_LENGTH > 0 || L1_DATA_B_LENGTH > 0 - dcplb_tbl[i_d].addr = L1_DATA_A_START; - dcplb_tbl[i_d++].data = L1_DMEMORY | PAGE_SIZE_4MB; + dcplb_tbl[cpu][i_d].addr = get_l1_data_a_start_cpu(cpu); + dcplb_tbl[cpu][i_d++].data = L1_DMEMORY | PAGE_SIZE_4MB; #endif #if L1_CODE_LENGTH > 0 - icplb_tbl[i_i].addr = L1_CODE_START; - icplb_tbl[i_i++].data = L1_IMEMORY | PAGE_SIZE_4MB; + icplb_tbl[cpu][i_i].addr = get_l1_code_start_cpu(cpu); + icplb_tbl[cpu][i_i++].data = L1_IMEMORY | PAGE_SIZE_4MB; #endif /* Cover L2 memory */ #if L2_LENGTH > 0 - dcplb_tbl[i_d].addr = L2_START; - dcplb_tbl[i_d++].data = L2_DMEMORY | PAGE_SIZE_1MB; - icplb_tbl[i_i].addr = L2_START; - icplb_tbl[i_i++].data = L2_IMEMORY | PAGE_SIZE_1MB; + dcplb_tbl[cpu][i_d].addr = L2_START; + dcplb_tbl[cpu][i_d++].data = L2_DMEMORY | PAGE_SIZE_1MB; + icplb_tbl[cpu][i_i].addr = L2_START; + icplb_tbl[cpu][i_i++].data = L2_IMEMORY | PAGE_SIZE_1MB; #endif first_mask_dcplb = i_d; @@ -101,7 +103,11 @@ void __init generate_cplb_tables(void) first_switched_icplb = i_i; while (i_d < MAX_CPLBS) - dcplb_tbl[i_d++].data = 0; + dcplb_tbl[cpu][i_d++].data = 0; while (i_i < MAX_CPLBS) - icplb_tbl[i_i++].data = 0; + icplb_tbl[cpu][i_i++].data = 0; +} + +void generate_cplb_tables_all(void) +{ } diff --git a/arch/blackfin/kernel/cplb-mpu/cplbmgr.c b/arch/blackfin/kernel/cplb-mpu/cplbmgr.c index baa52e261f0d..87463ce87f5a 100644 --- a/arch/blackfin/kernel/cplb-mpu/cplbmgr.c +++ b/arch/blackfin/kernel/cplb-mpu/cplbmgr.c @@ -25,15 +25,21 @@ #include <asm/cplbinit.h> #include <asm/mmu_context.h> -#define FAULT_RW (1 << 16) -#define FAULT_USERSUPV (1 << 17) +/* + * WARNING + * + * This file is compiled with certain -ffixed-reg options. We have to + * make sure not to call any functions here that could clobber these + * registers. + */ int page_mask_nelts; int page_mask_order; -unsigned long *current_rwx_mask; +unsigned long *current_rwx_mask[NR_CPUS]; -int nr_dcplb_miss, nr_icplb_miss, nr_icplb_supv_miss, nr_dcplb_prot; -int nr_cplb_flush; +int nr_dcplb_miss[NR_CPUS], nr_icplb_miss[NR_CPUS]; +int nr_icplb_supv_miss[NR_CPUS], nr_dcplb_prot[NR_CPUS]; +int nr_cplb_flush[NR_CPUS]; static inline void disable_dcplb(void) { @@ -98,42 +104,42 @@ static inline int write_permitted(int status, unsigned long data) } /* Counters to implement round-robin replacement. */ -static int icplb_rr_index, dcplb_rr_index; +static int icplb_rr_index[NR_CPUS], dcplb_rr_index[NR_CPUS]; /* * Find an ICPLB entry to be evicted and return its index. */ -static int evict_one_icplb(void) +static int evict_one_icplb(unsigned int cpu) { int i; for (i = first_switched_icplb; i < MAX_CPLBS; i++) - if ((icplb_tbl[i].data & CPLB_VALID) == 0) + if ((icplb_tbl[cpu][i].data & CPLB_VALID) == 0) return i; - i = first_switched_icplb + icplb_rr_index; + i = first_switched_icplb + icplb_rr_index[cpu]; if (i >= MAX_CPLBS) { i -= MAX_CPLBS - first_switched_icplb; - icplb_rr_index -= MAX_CPLBS - first_switched_icplb; + icplb_rr_index[cpu] -= MAX_CPLBS - first_switched_icplb; } - icplb_rr_index++; + icplb_rr_index[cpu]++; return i; } -static int evict_one_dcplb(void) +static int evict_one_dcplb(unsigned int cpu) { int i; for (i = first_switched_dcplb; i < MAX_CPLBS; i++) - if ((dcplb_tbl[i].data & CPLB_VALID) == 0) + if ((dcplb_tbl[cpu][i].data & CPLB_VALID) == 0) return i; - i = first_switched_dcplb + dcplb_rr_index; + i = first_switched_dcplb + dcplb_rr_index[cpu]; if (i >= MAX_CPLBS) { i -= MAX_CPLBS - first_switched_dcplb; - dcplb_rr_index -= MAX_CPLBS - first_switched_dcplb; + dcplb_rr_index[cpu] -= MAX_CPLBS - first_switched_dcplb; } - dcplb_rr_index++; + dcplb_rr_index[cpu]++; return i; } -static noinline int dcplb_miss(void) +static noinline int dcplb_miss(unsigned int cpu) { unsigned long addr = bfin_read_DCPLB_FAULT_ADDR(); int status = bfin_read_DCPLB_STATUS(); @@ -141,7 +147,7 @@ static noinline int dcplb_miss(void) int idx; unsigned long d_data; - nr_dcplb_miss++; + nr_dcplb_miss[cpu]++; d_data = CPLB_SUPV_WR | CPLB_VALID | CPLB_DIRTY | PAGE_SIZE_4KB; #ifdef CONFIG_BFIN_DCACHE @@ -168,25 +174,25 @@ static noinline int dcplb_miss(void) } else if (addr >= _ramend) { d_data |= CPLB_USER_RD | CPLB_USER_WR; } else { - mask = current_rwx_mask; + mask = current_rwx_mask[cpu]; if (mask) { int page = addr >> PAGE_SHIFT; - int offs = page >> 5; + int idx = page >> 5; int bit = 1 << (page & 31); - if (mask[offs] & bit) + if (mask[idx] & bit) d_data |= CPLB_USER_RD; mask += page_mask_nelts; - if (mask[offs] & bit) + if (mask[idx] & bit) d_data |= CPLB_USER_WR; } } - idx = evict_one_dcplb(); + idx = evict_one_dcplb(cpu); addr &= PAGE_MASK; - dcplb_tbl[idx].addr = addr; - dcplb_tbl[idx].data = d_data; + dcplb_tbl[cpu][idx].addr = addr; + dcplb_tbl[cpu][idx].data = d_data; disable_dcplb(); bfin_write32(DCPLB_DATA0 + idx * 4, d_data); @@ -196,21 +202,21 @@ static noinline int dcplb_miss(void) return 0; } -static noinline int icplb_miss(void) +static noinline int icplb_miss(unsigned int cpu) { unsigned long addr = bfin_read_ICPLB_FAULT_ADDR(); int status = bfin_read_ICPLB_STATUS(); int idx; unsigned long i_data; - nr_icplb_miss++; + nr_icplb_miss[cpu]++; /* If inside the uncached DMA region, fault. */ if (addr >= _ramend - DMA_UNCACHED_REGION && addr < _ramend) return CPLB_PROT_VIOL; if (status & FAULT_USERSUPV) - nr_icplb_supv_miss++; + nr_icplb_supv_miss[cpu]++; /* * First, try to find a CPLB that matches this address. If we @@ -218,8 +224,8 @@ static noinline int icplb_miss(void) * that the instruction crosses a page boundary. */ for (idx = first_switched_icplb; idx < MAX_CPLBS; idx++) { - if (icplb_tbl[idx].data & CPLB_VALID) { - unsigned long this_addr = icplb_tbl[idx].addr; + if (icplb_tbl[cpu][idx].data & CPLB_VALID) { + unsigned long this_addr = icplb_tbl[cpu][idx].addr; if (this_addr <= addr && this_addr + PAGE_SIZE > addr) { addr += PAGE_SIZE; break; @@ -257,23 +263,23 @@ static noinline int icplb_miss(void) * Otherwise, check the x bitmap of the current process. */ if (!(status & FAULT_USERSUPV)) { - unsigned long *mask = current_rwx_mask; + unsigned long *mask = current_rwx_mask[cpu]; if (mask) { int page = addr >> PAGE_SHIFT; - int offs = page >> 5; + int idx = page >> 5; int bit = 1 << (page & 31); mask += 2 * page_mask_nelts; - if (mask[offs] & bit) + if (mask[idx] & bit) i_data |= CPLB_USER_RD; } } } - idx = evict_one_icplb(); + idx = evict_one_icplb(cpu); addr &= PAGE_MASK; - icplb_tbl[idx].addr = addr; - icplb_tbl[idx].data = i_data; + icplb_tbl[cpu][idx].addr = addr; + icplb_tbl[cpu][idx].data = i_data; disable_icplb(); bfin_write32(ICPLB_DATA0 + idx * 4, i_data); @@ -283,19 +289,19 @@ static noinline int icplb_miss(void) return 0; } -static noinline int dcplb_protection_fault(void) +static noinline int dcplb_protection_fault(unsigned int cpu) { int status = bfin_read_DCPLB_STATUS(); - nr_dcplb_prot++; + nr_dcplb_prot[cpu]++; if (status & FAULT_RW) { int idx = faulting_cplb_index(status); - unsigned long data = dcplb_tbl[idx].data; + unsigned long data = dcplb_tbl[cpu][idx].data; if (!(data & CPLB_WT) && !(data & CPLB_DIRTY) && write_permitted(status, data)) { data |= CPLB_DIRTY; - dcplb_tbl[idx].data = data; + dcplb_tbl[cpu][idx].data = data; bfin_write32(DCPLB_DATA0 + idx * 4, data); return 0; } @@ -306,44 +312,45 @@ static noinline int dcplb_protection_fault(void) int cplb_hdr(int seqstat, struct pt_regs *regs) { int cause = seqstat & 0x3f; + unsigned int cpu = smp_processor_id(); switch (cause) { case 0x23: - return dcplb_protection_fault(); + return dcplb_protection_fault(cpu); case 0x2C: - return icplb_miss(); + return icplb_miss(cpu); case 0x26: - return dcplb_miss(); + return dcplb_miss(cpu); default: return 1; } } -void flush_switched_cplbs(void) +void flush_switched_cplbs(unsigned int cpu) { int i; unsigned long flags; - nr_cplb_flush++; + nr_cplb_flush[cpu]++; - local_irq_save(flags); + local_irq_save_hw(flags); disable_icplb(); for (i = first_switched_icplb; i < MAX_CPLBS; i++) { - icplb_tbl[i].data = 0; + icplb_tbl[cpu][i].data = 0; bfin_write32(ICPLB_DATA0 + i * 4, 0); } enable_icplb(); disable_dcplb(); for (i = first_switched_dcplb; i < MAX_CPLBS; i++) { - dcplb_tbl[i].data = 0; + dcplb_tbl[cpu][i].data = 0; bfin_write32(DCPLB_DATA0 + i * 4, 0); } enable_dcplb(); - local_irq_restore(flags); + local_irq_restore_hw(flags); } -void set_mask_dcplbs(unsigned long *masks) +void set_mask_dcplbs(unsigned long *masks, unsigned int cpu) { int i; unsigned long addr = (unsigned long)masks; @@ -351,12 +358,12 @@ void set_mask_dcplbs(unsigned long *masks) unsigned long flags; if (!masks) { - current_rwx_mask = masks; + current_rwx_mask[cpu] = masks; return; } - local_irq_save(flags); - current_rwx_mask = masks; + local_irq_save_hw(flags); + current_rwx_mask[cpu] = masks; d_data = CPLB_SUPV_WR | CPLB_VALID | CPLB_DIRTY | PAGE_SIZE_4KB; #ifdef CONFIG_BFIN_DCACHE @@ -368,12 +375,12 @@ void set_mask_dcplbs(unsigned long *masks) disable_dcplb(); for (i = first_mask_dcplb; i < first_switched_dcplb; i++) { - dcplb_tbl[i].addr = addr; - dcplb_tbl[i].data = d_data; + dcplb_tbl[cpu][i].addr = addr; + dcplb_tbl[cpu][i].data = d_data; bfin_write32(DCPLB_DATA0 + i * 4, d_data); bfin_write32(DCPLB_ADDR0 + i * 4, addr); addr += PAGE_SIZE; } enable_dcplb(); - local_irq_restore(flags); + local_irq_restore_hw(flags); } diff --git a/arch/blackfin/kernel/cplb-nompu/Makefile b/arch/blackfin/kernel/cplb-nompu/Makefile index d36ea9b5382e..7d70d3bf3212 100644 --- a/arch/blackfin/kernel/cplb-nompu/Makefile +++ b/arch/blackfin/kernel/cplb-nompu/Makefile @@ -2,7 +2,9 @@ # arch/blackfin/kernel/cplb-nompu/Makefile # -obj-y := cplbinit.o cacheinit.o cplbhdlr.o cplbmgr.o - -obj-$(CONFIG_CPLB_INFO) += cplbinfo.o +obj-y := cplbinit.o cacheinit.o cplbmgr.o +CFLAGS_cplbmgr.o := -ffixed-I0 -ffixed-I1 -ffixed-I2 -ffixed-I3 \ + -ffixed-L0 -ffixed-L1 -ffixed-L2 -ffixed-L3 \ + -ffixed-M0 -ffixed-M1 -ffixed-M2 -ffixed-M3 \ + -ffixed-B0 -ffixed-B1 -ffixed-B2 -ffixed-B3 diff --git a/arch/blackfin/kernel/cplb-nompu/cacheinit.c b/arch/blackfin/kernel/cplb-nompu/cacheinit.c index bd0831592c2c..c6ff947f9d37 100644 --- a/arch/blackfin/kernel/cplb-nompu/cacheinit.c +++ b/arch/blackfin/kernel/cplb-nompu/cacheinit.c @@ -25,19 +25,15 @@ #include <asm/cplbinit.h> #if defined(CONFIG_BFIN_ICACHE) -void __init bfin_icache_init(void) +void __cpuinit bfin_icache_init(struct cplb_entry *icplb_tbl) { - unsigned long *table = icplb_table; unsigned long ctrl; int i; + SSYNC(); for (i = 0; i < MAX_CPLBS; i++) { - unsigned long addr = *table++; - unsigned long data = *table++; - if (addr == (unsigned long)-1) - break; - bfin_write32(ICPLB_ADDR0 + i * 4, addr); - bfin_write32(ICPLB_DATA0 + i * 4, data); + bfin_write32(ICPLB_ADDR0 + i * 4, icplb_tbl[i].addr); + bfin_write32(ICPLB_DATA0 + i * 4, icplb_tbl[i].data); } ctrl = bfin_read_IMEM_CONTROL(); ctrl |= IMC | ENICPLB; @@ -47,20 +43,17 @@ void __init bfin_icache_init(void) #endif #if defined(CONFIG_BFIN_DCACHE) -void __init bfin_dcache_init(void) +void __cpuinit bfin_dcache_init(struct cplb_entry *dcplb_tbl) { - unsigned long *table = dcplb_table; unsigned long ctrl; int i; + SSYNC(); for (i = 0; i < MAX_CPLBS; i++) { - unsigned long addr = *table++; - unsigned long data = *table++; - if (addr == (unsigned long)-1) - break; - bfin_write32(DCPLB_ADDR0 + i * 4, addr); - bfin_write32(DCPLB_DATA0 + i * 4, data); + bfin_write32(DCPLB_ADDR0 + i * 4, dcplb_tbl[i].addr); + bfin_write32(DCPLB_DATA0 + i * 4, dcplb_tbl[i].data); } + ctrl = bfin_read_DMEM_CONTROL(); ctrl |= DMEM_CNTR; bfin_write_DMEM_CONTROL(ctrl); diff --git a/arch/blackfin/kernel/cplb-nompu/cplbhdlr.S b/arch/blackfin/kernel/cplb-nompu/cplbhdlr.S deleted file mode 100644 index ecbabc0a1fed..000000000000 --- a/arch/blackfin/kernel/cplb-nompu/cplbhdlr.S +++ /dev/null @@ -1,130 +0,0 @@ -/* - * File: arch/blackfin/mach-common/cplbhdlr.S - * Based on: - * Author: LG Soft India - * - * Created: ? - * Description: CPLB exception handler - * - * Modified: - * Copyright 2004-2006 Analog Devices Inc. - * - * Bugs: Enter bugs at http://blackfin.uclinux.org/ - * - * 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. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see the file COPYING, or write - * to the Free Software Foundation, Inc., - * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include <linux/linkage.h> -#include <asm/cplb.h> -#include <asm/entry.h> - -#ifdef CONFIG_EXCPT_IRQ_SYSC_L1 -.section .l1.text -#else -.text -#endif - -.type _cplb_mgr, STT_FUNC; -.type _panic_cplb_error, STT_FUNC; - -.align 2 - -ENTRY(__cplb_hdr) - R2 = SEQSTAT; - - /* Mask the contents of SEQSTAT and leave only EXCAUSE in R2 */ - R2 <<= 26; - R2 >>= 26; - - R1 = 0x23; /* Data access CPLB protection violation */ - CC = R2 == R1; - IF !CC JUMP .Lnot_data_write; - R0 = 2; /* is a write to data space*/ - JUMP .Lis_icplb_miss; - -.Lnot_data_write: - R1 = 0x2C; /* CPLB miss on an instruction fetch */ - CC = R2 == R1; - R0 = 0; /* is_data_miss == False*/ - IF CC JUMP .Lis_icplb_miss; - - R1 = 0x26; - CC = R2 == R1; - IF !CC JUMP .Lunknown; - - R0 = 1; /* is_data_miss == True*/ - -.Lis_icplb_miss: - -#if defined(CONFIG_BFIN_ICACHE) || defined(CONFIG_BFIN_DCACHE) -# if defined(CONFIG_BFIN_ICACHE) && !defined(CONFIG_BFIN_DCACHE) - R1 = CPLB_ENABLE_ICACHE; -# endif -# if !defined(CONFIG_BFIN_ICACHE) && defined(CONFIG_BFIN_DCACHE) - R1 = CPLB_ENABLE_DCACHE; -# endif -# if defined(CONFIG_BFIN_ICACHE) && defined(CONFIG_BFIN_DCACHE) - R1 = CPLB_ENABLE_DCACHE | CPLB_ENABLE_ICACHE; -# endif -#else - R1 = 0; -#endif - - [--SP] = RETS; - CALL _cplb_mgr; - RETS = [SP++]; - CC = R0 == 0; - IF !CC JUMP .Lnot_replaced; - RTS; - -/* - * Diagnostic exception handlers - */ -.Lunknown: - R0 = CPLB_UNKNOWN_ERR; - JUMP .Lcplb_error; - -.Lnot_replaced: - CC = R0 == CPLB_NO_UNLOCKED; - IF !CC JUMP .Lnext_check; - R0 = CPLB_NO_UNLOCKED; - JUMP .Lcplb_error; - -.Lnext_check: - CC = R0 == CPLB_NO_ADDR_MATCH; - IF !CC JUMP .Lnext_check2; - R0 = CPLB_NO_ADDR_MATCH; - JUMP .Lcplb_error; - -.Lnext_check2: - CC = R0 == CPLB_PROT_VIOL; - IF !CC JUMP .Lstrange_return_from_cplb_mgr; - R0 = CPLB_PROT_VIOL; - JUMP .Lcplb_error; - -.Lstrange_return_from_cplb_mgr: - IDLE; - CSYNC; - JUMP .Lstrange_return_from_cplb_mgr; - -.Lcplb_error: - R1 = sp; - SP += -12; - call _panic_cplb_error; - SP += 12; - JUMP.L _handle_bad_cplb; - -ENDPROC(__cplb_hdr) diff --git a/arch/blackfin/kernel/cplb-nompu/cplbinfo.c b/arch/blackfin/kernel/cplb-nompu/cplbinfo.c deleted file mode 100644 index 1e74f0b97996..000000000000 --- a/arch/blackfin/kernel/cplb-nompu/cplbinfo.c +++ /dev/null @@ -1,195 +0,0 @@ -/* - * File: arch/blackfin/mach-common/cplbinfo.c - * Based on: - * Author: Sonic Zhang <sonic.zhang@analog.com> - * - * Created: Jan. 2005 - * Description: Display CPLB status - * - * Modified: - * Copyright 2004-2006 Analog Devices Inc. - * - * Bugs: Enter bugs at http://blackfin.uclinux.org/ - * - * 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. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see the file COPYING, or write - * to the Free Software Foundation, Inc., - * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/proc_fs.h> -#include <linux/uaccess.h> - -#include <asm/cplbinit.h> -#include <asm/blackfin.h> - -#define CPLB_I 1 -#define CPLB_D 2 - -#define SYNC_SYS SSYNC() -#define SYNC_CORE CSYNC() - -#define CPLB_BIT_PAGESIZE 0x30000 - -static int page_size_table[4] = { - 0x00000400, /* 1K */ - 0x00001000, /* 4K */ - 0x00100000, /* 1M */ - 0x00400000 /* 4M */ -}; - -static char page_size_string_table[][4] = { "1K", "4K", "1M", "4M" }; - -static int cplb_find_entry(unsigned long *cplb_addr, - unsigned long *cplb_data, unsigned long addr, - unsigned long data) -{ - int ii; - - for (ii = 0; ii < 16; ii++) - if (addr >= cplb_addr[ii] && addr < cplb_addr[ii] + - page_size_table[(cplb_data[ii] & CPLB_BIT_PAGESIZE) >> 16] - && (cplb_data[ii] == data)) - return ii; - - return -1; -} - -static char *cplb_print_entry(char *buf, int type) -{ - unsigned long *p_addr = dpdt_table; - unsigned long *p_data = dpdt_table + 1; - unsigned long *p_icount = dpdt_swapcount_table; - unsigned long *p_ocount = dpdt_swapcount_table + 1; - unsigned long *cplb_addr = (unsigned long *)DCPLB_ADDR0; - unsigned long *cplb_data = (unsigned long *)DCPLB_DATA0; - int entry = 0, used_cplb = 0; - - if (type == CPLB_I) { - buf += sprintf(buf, "Instruction CPLB entry:\n"); - p_addr = ipdt_table; - p_data = ipdt_table + 1; - p_icount = ipdt_swapcount_table; - p_ocount = ipdt_swapcount_table + 1; - cplb_addr = (unsigned long *)ICPLB_ADDR0; - cplb_data = (unsigned long *)ICPLB_DATA0; - } else - buf += sprintf(buf, "Data CPLB entry:\n"); - - buf += sprintf(buf, "Address\t\tData\tSize\tValid\tLocked\tSwapin\tiCount\toCount\n"); - - while (*p_addr != 0xffffffff) { - entry = cplb_find_entry(cplb_addr, cplb_data, *p_addr, *p_data); - if (entry >= 0) - used_cplb |= 1 << entry; - - buf += - sprintf(buf, - "0x%08lx\t0x%05lx\t%s\t%c\t%c\t%2d\t%ld\t%ld\n", - *p_addr, *p_data, - page_size_string_table[(*p_data & 0x30000) >> 16], - (*p_data & CPLB_VALID) ? 'Y' : 'N', - (*p_data & CPLB_LOCK) ? 'Y' : 'N', entry, *p_icount, - *p_ocount); - - p_addr += 2; - p_data += 2; - p_icount += 2; - p_ocount += 2; - } - - if (used_cplb != 0xffff) { - buf += sprintf(buf, "Unused/mismatched CPLBs:\n"); - - for (entry = 0; entry < 16; entry++) - if (0 == ((1 << entry) & used_cplb)) { - int flags = cplb_data[entry]; - buf += - sprintf(buf, - "%2d: 0x%08lx\t0x%05x\t%s\t%c\t%c\n", - entry, cplb_addr[entry], flags, - page_size_string_table[(flags & - 0x30000) >> - 16], - (flags & CPLB_VALID) ? 'Y' : 'N', - (flags & CPLB_LOCK) ? 'Y' : 'N'); - } - } - - buf += sprintf(buf, "\n"); - - return buf; -} - -static int cplbinfo_proc_output(char *buf) -{ - char *p; - - p = buf; - - p += sprintf(p, "------------------ CPLB Information ------------------\n\n"); - - if (bfin_read_IMEM_CONTROL() & ENICPLB) - p = cplb_print_entry(p, CPLB_I); - else - p += sprintf(p, "Instruction CPLB is disabled.\n\n"); - - if (bfin_read_DMEM_CONTROL() & ENDCPLB) - p = cplb_print_entry(p, CPLB_D); - else - p += sprintf(p, "Data CPLB is disabled.\n"); - - return p - buf; -} - -static int cplbinfo_read_proc(char *page, char **start, off_t off, - int count, int *eof, void *data) -{ - int len; - - len = cplbinfo_proc_output(page); - if (len <= off + count) - *eof = 1; - *start = page + off; - len -= off; - if (len > count) - len = count; - if (len < 0) - len = 0; - return len; -} - -static int __init cplbinfo_init(void) -{ - struct proc_dir_entry *entry; - - entry = create_proc_entry("cplbinfo", 0, NULL); - if (!entry) - return -ENOMEM; - - entry->read_proc = cplbinfo_read_proc; - entry->data = NULL; - - return 0; -} - -static void __exit cplbinfo_exit(void) -{ - remove_proc_entry("cplbinfo", NULL); -} - -module_init(cplbinfo_init); -module_exit(cplbinfo_exit); diff --git a/arch/blackfin/kernel/cplb-nompu/cplbinit.c b/arch/blackfin/kernel/cplb-nompu/cplbinit.c index 2debc900e246..0e28f7595733 100644 --- a/arch/blackfin/kernel/cplb-nompu/cplbinit.c +++ b/arch/blackfin/kernel/cplb-nompu/cplbinit.c @@ -20,445 +20,152 @@ * to the Free Software Foundation, Inc., * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ + #include <linux/module.h> #include <asm/blackfin.h> #include <asm/cacheflush.h> #include <asm/cplb.h> #include <asm/cplbinit.h> +#include <asm/mem_map.h> -#define CPLB_MEM CONFIG_MAX_MEM_SIZE - -/* -* Number of required data CPLB switchtable entries -* MEMSIZE / 4 (we mostly install 4M page size CPLBs -* approx 16 for smaller 1MB page size CPLBs for allignment purposes -* 1 for L1 Data Memory -* possibly 1 for L2 Data Memory -* 1 for CONFIG_DEBUG_HUNT_FOR_ZERO -* 1 for ASYNC Memory -*/ -#define MAX_SWITCH_D_CPLBS (((CPLB_MEM / 4) + 16 + 1 + 1 + 1 \ - + ASYNC_MEMORY_CPLB_COVERAGE) * 2) - -/* -* Number of required instruction CPLB switchtable entries -* MEMSIZE / 4 (we mostly install 4M page size CPLBs -* approx 12 for smaller 1MB page size CPLBs for allignment purposes -* 1 for L1 Instruction Memory -* possibly 1 for L2 Instruction Memory -* 1 for CONFIG_DEBUG_HUNT_FOR_ZERO -*/ -#define MAX_SWITCH_I_CPLBS (((CPLB_MEM / 4) + 12 + 1 + 1 + 1) * 2) - - -u_long icplb_table[MAX_CPLBS + 1]; -u_long dcplb_table[MAX_CPLBS + 1]; - -#ifdef CONFIG_CPLB_SWITCH_TAB_L1 -# define PDT_ATTR __attribute__((l1_data)) -#else -# define PDT_ATTR -#endif - -u_long ipdt_table[MAX_SWITCH_I_CPLBS + 1] PDT_ATTR; -u_long dpdt_table[MAX_SWITCH_D_CPLBS + 1] PDT_ATTR; +struct cplb_entry icplb_tbl[NR_CPUS][MAX_CPLBS] PDT_ATTR; +struct cplb_entry dcplb_tbl[NR_CPUS][MAX_CPLBS] PDT_ATTR; -#ifdef CONFIG_CPLB_INFO -u_long ipdt_swapcount_table[MAX_SWITCH_I_CPLBS] PDT_ATTR; -u_long dpdt_swapcount_table[MAX_SWITCH_D_CPLBS] PDT_ATTR; -#endif +int first_switched_icplb PDT_ATTR; +int first_switched_dcplb PDT_ATTR; -struct s_cplb { - struct cplb_tab init_i; - struct cplb_tab init_d; - struct cplb_tab switch_i; - struct cplb_tab switch_d; -}; +struct cplb_boundary dcplb_bounds[9] PDT_ATTR; +struct cplb_boundary icplb_bounds[7] PDT_ATTR; -#if defined(CONFIG_BFIN_DCACHE) || defined(CONFIG_BFIN_ICACHE) -static struct cplb_desc cplb_data[] = { - { - .start = 0, - .end = SIZE_1K, - .psize = SIZE_1K, - .attr = INITIAL_T | SWITCH_T | I_CPLB | D_CPLB, - .i_conf = SDRAM_OOPS, - .d_conf = SDRAM_OOPS, -#if defined(CONFIG_DEBUG_HUNT_FOR_ZERO) - .valid = 1, -#else - .valid = 0, -#endif - .name = "Zero Pointer Guard Page", - }, - { - .start = L1_CODE_START, - .end = L1_CODE_START + L1_CODE_LENGTH, - .psize = SIZE_4M, - .attr = INITIAL_T | SWITCH_T | I_CPLB, - .i_conf = L1_IMEMORY, - .d_conf = 0, - .valid = 1, - .name = "L1 I-Memory", - }, - { - .start = L1_DATA_A_START, - .end = L1_DATA_B_START + L1_DATA_B_LENGTH, - .psize = SIZE_4M, - .attr = INITIAL_T | SWITCH_T | D_CPLB, - .i_conf = 0, - .d_conf = L1_DMEMORY, -#if ((L1_DATA_A_LENGTH > 0) || (L1_DATA_B_LENGTH > 0)) - .valid = 1, -#else - .valid = 0, -#endif - .name = "L1 D-Memory", - }, - { - .start = 0, - .end = 0, /* dynamic */ - .psize = 0, - .attr = INITIAL_T | SWITCH_T | I_CPLB | D_CPLB, - .i_conf = SDRAM_IGENERIC, - .d_conf = SDRAM_DGENERIC, - .valid = 1, - .name = "Kernel Memory", - }, - { - .start = 0, /* dynamic */ - .end = 0, /* dynamic */ - .psize = 0, - .attr = INITIAL_T | SWITCH_T | D_CPLB, - .i_conf = SDRAM_IGENERIC, - .d_conf = SDRAM_DNON_CHBL, - .valid = 1, - .name = "uClinux MTD Memory", - }, - { - .start = 0, /* dynamic */ - .end = 0, /* dynamic */ - .psize = SIZE_1M, - .attr = INITIAL_T | SWITCH_T | D_CPLB, - .d_conf = SDRAM_DNON_CHBL, - .valid = 1, - .name = "Uncached DMA Zone", - }, - { - .start = 0, /* dynamic */ - .end = 0, /* dynamic */ - .psize = 0, - .attr = SWITCH_T | D_CPLB, - .i_conf = 0, /* dynamic */ - .d_conf = 0, /* dynamic */ - .valid = 1, - .name = "Reserved Memory", - }, - { - .start = ASYNC_BANK0_BASE, - .end = ASYNC_BANK3_BASE + ASYNC_BANK3_SIZE, - .psize = 0, - .attr = SWITCH_T | D_CPLB, - .d_conf = SDRAM_EBIU, - .valid = 1, - .name = "Asynchronous Memory Banks", - }, - { - .start = L2_START, - .end = L2_START + L2_LENGTH, - .psize = SIZE_1M, - .attr = SWITCH_T | I_CPLB | D_CPLB, - .i_conf = L2_IMEMORY, - .d_conf = L2_DMEMORY, - .valid = (L2_LENGTH > 0), - .name = "L2 Memory", - }, - { - .start = BOOT_ROM_START, - .end = BOOT_ROM_START + BOOT_ROM_LENGTH, - .psize = SIZE_1M, - .attr = SWITCH_T | I_CPLB | D_CPLB, - .i_conf = SDRAM_IGENERIC, - .d_conf = SDRAM_DGENERIC, - .valid = 1, - .name = "On-Chip BootROM", - }, -}; +int icplb_nr_bounds PDT_ATTR; +int dcplb_nr_bounds PDT_ATTR; -static u16 __init lock_kernel_check(u32 start, u32 end) +void __init generate_cplb_tables_cpu(unsigned int cpu) { - if (start >= (u32)_end || end <= (u32)_stext) - return 0; + int i_d, i_i; + unsigned long addr; - /* This cplb block overlapped with kernel area. */ - return IN_KERNEL; -} + struct cplb_entry *d_tbl = dcplb_tbl[cpu]; + struct cplb_entry *i_tbl = icplb_tbl[cpu]; -static unsigned short __init -fill_cplbtab(struct cplb_tab *table, - unsigned long start, unsigned long end, - unsigned long block_size, unsigned long cplb_data) -{ - int i; + printk(KERN_INFO "NOMPU: setting up cplb tables\n"); - switch (block_size) { - case SIZE_4M: - i = 3; - break; - case SIZE_1M: - i = 2; - break; - case SIZE_4K: - i = 1; - break; - case SIZE_1K: - default: - i = 0; - break; - } - - cplb_data = (cplb_data & ~(3 << 16)) | (i << 16); - - while ((start < end) && (table->pos < table->size)) { + i_d = i_i = 0; - table->tab[table->pos++] = start; + /* Set up the zero page. */ + d_tbl[i_d].addr = 0; + d_tbl[i_d++].data = SDRAM_OOPS | PAGE_SIZE_1KB; - if (lock_kernel_check(start, start + block_size) == IN_KERNEL) - table->tab[table->pos++] = - cplb_data | CPLB_LOCK | CPLB_DIRTY; - else - table->tab[table->pos++] = cplb_data; + /* Cover kernel memory with 4M pages. */ + addr = 0; - start += block_size; + for (; addr < memory_start; addr += 4 * 1024 * 1024) { + d_tbl[i_d].addr = addr; + d_tbl[i_d++].data = SDRAM_DGENERIC | PAGE_SIZE_4MB; + i_tbl[i_i].addr = addr; + i_tbl[i_i++].data = SDRAM_IGENERIC | PAGE_SIZE_4MB; } - return 0; -} -static unsigned short __init -close_cplbtab(struct cplb_tab *table) -{ - - while (table->pos < table->size) { - - table->tab[table->pos++] = 0; - table->tab[table->pos++] = 0; /* !CPLB_VALID */ + /* Cover L1 memory. One 4M area for code and data each is enough. */ + if (L1_DATA_A_LENGTH || L1_DATA_B_LENGTH) { + d_tbl[i_d].addr = L1_DATA_A_START; + d_tbl[i_d++].data = L1_DMEMORY | PAGE_SIZE_4MB; } - return 0; -} + i_tbl[i_i].addr = L1_CODE_START; + i_tbl[i_i++].data = L1_IMEMORY | PAGE_SIZE_4MB; -/* helper function */ -static void __init -__fill_code_cplbtab(struct cplb_tab *t, int i, u32 a_start, u32 a_end) -{ - if (cplb_data[i].psize) { - fill_cplbtab(t, - cplb_data[i].start, - cplb_data[i].end, - cplb_data[i].psize, - cplb_data[i].i_conf); - } else { -#if defined(CONFIG_BFIN_ICACHE) - if (ANOMALY_05000263 && i == SDRAM_KERN) { - fill_cplbtab(t, - cplb_data[i].start, - cplb_data[i].end, - SIZE_4M, - cplb_data[i].i_conf); - } else -#endif - { - fill_cplbtab(t, - cplb_data[i].start, - a_start, - SIZE_1M, - cplb_data[i].i_conf); - fill_cplbtab(t, - a_start, - a_end, - SIZE_4M, - cplb_data[i].i_conf); - fill_cplbtab(t, a_end, - cplb_data[i].end, - SIZE_1M, - cplb_data[i].i_conf); - } - } -} + first_switched_dcplb = i_d; + first_switched_icplb = i_i; -static void __init -__fill_data_cplbtab(struct cplb_tab *t, int i, u32 a_start, u32 a_end) -{ - if (cplb_data[i].psize) { - fill_cplbtab(t, - cplb_data[i].start, - cplb_data[i].end, - cplb_data[i].psize, - cplb_data[i].d_conf); - } else { - fill_cplbtab(t, - cplb_data[i].start, - a_start, SIZE_1M, - cplb_data[i].d_conf); - fill_cplbtab(t, a_start, - a_end, SIZE_4M, - cplb_data[i].d_conf); - fill_cplbtab(t, a_end, - cplb_data[i].end, - SIZE_1M, - cplb_data[i].d_conf); - } + BUG_ON(first_switched_dcplb > MAX_CPLBS); + BUG_ON(first_switched_icplb > MAX_CPLBS); + + while (i_d < MAX_CPLBS) + d_tbl[i_d++].data = 0; + while (i_i < MAX_CPLBS) + i_tbl[i_i++].data = 0; } -void __init generate_cplb_tables(void) +void __init generate_cplb_tables_all(void) { + int i_d, i_i; - u16 i, j, process; - u32 a_start, a_end, as, ae, as_1m; - - struct cplb_tab *t_i = NULL; - struct cplb_tab *t_d = NULL; - struct s_cplb cplb; - - printk(KERN_INFO "NOMPU: setting up cplb tables for global access\n"); - - cplb.init_i.size = MAX_CPLBS; - cplb.init_d.size = MAX_CPLBS; - cplb.switch_i.size = MAX_SWITCH_I_CPLBS; - cplb.switch_d.size = MAX_SWITCH_D_CPLBS; - - cplb.init_i.pos = 0; - cplb.init_d.pos = 0; - cplb.switch_i.pos = 0; - cplb.switch_d.pos = 0; - - cplb.init_i.tab = icplb_table; - cplb.init_d.tab = dcplb_table; - cplb.switch_i.tab = ipdt_table; - cplb.switch_d.tab = dpdt_table; - - cplb_data[SDRAM_KERN].end = memory_end; - + i_d = 0; + /* Normal RAM, including MTD FS. */ #ifdef CONFIG_MTD_UCLINUX - cplb_data[SDRAM_RAM_MTD].start = memory_mtd_start; - cplb_data[SDRAM_RAM_MTD].end = memory_mtd_start + mtd_size; - cplb_data[SDRAM_RAM_MTD].valid = mtd_size > 0; -# if defined(CONFIG_ROMFS_FS) - cplb_data[SDRAM_RAM_MTD].attr |= I_CPLB; - - /* - * The ROMFS_FS size is often not multiple of 1MB. - * This can cause multiple CPLB sets covering the same memory area. - * This will then cause multiple CPLB hit exceptions. - * Workaround: We ensure a contiguous memory area by extending the kernel - * memory section over the mtd section. - * For ROMFS_FS memory must be covered with ICPLBs anyways. - * So there is no difference between kernel and mtd memory setup. - */ - - cplb_data[SDRAM_KERN].end = memory_mtd_start + mtd_size;; - cplb_data[SDRAM_RAM_MTD].valid = 0; - -# endif + dcplb_bounds[i_d].eaddr = memory_mtd_start + mtd_size; #else - cplb_data[SDRAM_RAM_MTD].valid = 0; + dcplb_bounds[i_d].eaddr = memory_end; #endif + dcplb_bounds[i_d++].data = SDRAM_DGENERIC; + /* DMA uncached region. */ + if (DMA_UNCACHED_REGION) { + dcplb_bounds[i_d].eaddr = _ramend; + dcplb_bounds[i_d++].data = SDRAM_DNON_CHBL; + } + if (_ramend != physical_mem_end) { + /* Reserved memory. */ + dcplb_bounds[i_d].eaddr = physical_mem_end; + dcplb_bounds[i_d++].data = (reserved_mem_dcache_on ? + SDRAM_DGENERIC : SDRAM_DNON_CHBL); + } + /* Addressing hole up to the async bank. */ + dcplb_bounds[i_d].eaddr = ASYNC_BANK0_BASE; + dcplb_bounds[i_d++].data = 0; + /* ASYNC banks. */ + dcplb_bounds[i_d].eaddr = ASYNC_BANK3_BASE + ASYNC_BANK3_SIZE; + dcplb_bounds[i_d++].data = SDRAM_EBIU; + /* Addressing hole up to BootROM. */ + dcplb_bounds[i_d].eaddr = BOOT_ROM_START; + dcplb_bounds[i_d++].data = 0; + /* BootROM -- largest one should be less than 1 meg. */ + dcplb_bounds[i_d].eaddr = BOOT_ROM_START + (1 * 1024 * 1024); + dcplb_bounds[i_d++].data = SDRAM_DGENERIC; + if (L2_LENGTH) { + /* Addressing hole up to L2 SRAM. */ + dcplb_bounds[i_d].eaddr = L2_START; + dcplb_bounds[i_d++].data = 0; + /* L2 SRAM. */ + dcplb_bounds[i_d].eaddr = L2_START + L2_LENGTH; + dcplb_bounds[i_d++].data = L2_DMEMORY; + } + dcplb_nr_bounds = i_d; + BUG_ON(dcplb_nr_bounds > ARRAY_SIZE(dcplb_bounds)); - cplb_data[SDRAM_DMAZ].start = _ramend - DMA_UNCACHED_REGION; - cplb_data[SDRAM_DMAZ].end = _ramend; - - cplb_data[RES_MEM].start = _ramend; - cplb_data[RES_MEM].end = physical_mem_end; - - if (reserved_mem_dcache_on) - cplb_data[RES_MEM].d_conf = SDRAM_DGENERIC; - else - cplb_data[RES_MEM].d_conf = SDRAM_DNON_CHBL; - - if (reserved_mem_icache_on) - cplb_data[RES_MEM].i_conf = SDRAM_IGENERIC; - else - cplb_data[RES_MEM].i_conf = SDRAM_INON_CHBL; - - for (i = ZERO_P; i < ARRAY_SIZE(cplb_data); ++i) { - if (!cplb_data[i].valid) - continue; - - as_1m = cplb_data[i].start % SIZE_1M; - - /* We need to make sure all sections are properly 1M aligned - * However between Kernel Memory and the Kernel mtd section, depending on the - * rootfs size, there can be overlapping memory areas. - */ - - if (as_1m && i != L1I_MEM && i != L1D_MEM) { + i_i = 0; + /* Normal RAM, including MTD FS. */ #ifdef CONFIG_MTD_UCLINUX - if (i == SDRAM_RAM_MTD) { - if ((cplb_data[SDRAM_KERN].end + 1) > cplb_data[SDRAM_RAM_MTD].start) - cplb_data[SDRAM_RAM_MTD].start = (cplb_data[i].start & (-2*SIZE_1M)) + SIZE_1M; - else - cplb_data[SDRAM_RAM_MTD].start = (cplb_data[i].start & (-2*SIZE_1M)); - } else + icplb_bounds[i_i].eaddr = memory_mtd_start + mtd_size; +#else + icplb_bounds[i_i].eaddr = memory_end; #endif - printk(KERN_WARNING "Unaligned Start of %s at 0x%X\n", - cplb_data[i].name, cplb_data[i].start); - } - - as = cplb_data[i].start % SIZE_4M; - ae = cplb_data[i].end % SIZE_4M; - - if (as) - a_start = cplb_data[i].start + (SIZE_4M - (as)); - else - a_start = cplb_data[i].start; - - a_end = cplb_data[i].end - ae; - - for (j = INITIAL_T; j <= SWITCH_T; j++) { - - switch (j) { - case INITIAL_T: - if (cplb_data[i].attr & INITIAL_T) { - t_i = &cplb.init_i; - t_d = &cplb.init_d; - process = 1; - } else - process = 0; - break; - case SWITCH_T: - if (cplb_data[i].attr & SWITCH_T) { - t_i = &cplb.switch_i; - t_d = &cplb.switch_d; - process = 1; - } else - process = 0; - break; - default: - process = 0; - break; - } - - if (!process) - continue; - if (cplb_data[i].attr & I_CPLB) - __fill_code_cplbtab(t_i, i, a_start, a_end); - - if (cplb_data[i].attr & D_CPLB) - __fill_data_cplbtab(t_d, i, a_start, a_end); - } + icplb_bounds[i_i++].data = SDRAM_IGENERIC; + /* DMA uncached region. */ + if (DMA_UNCACHED_REGION) { + icplb_bounds[i_i].eaddr = _ramend; + icplb_bounds[i_i++].data = 0; } - -/* close tables */ - - close_cplbtab(&cplb.init_i); - close_cplbtab(&cplb.init_d); - - cplb.init_i.tab[cplb.init_i.pos] = -1; - cplb.init_d.tab[cplb.init_d.pos] = -1; - cplb.switch_i.tab[cplb.switch_i.pos] = -1; - cplb.switch_d.tab[cplb.switch_d.pos] = -1; - + if (_ramend != physical_mem_end) { + /* Reserved memory. */ + icplb_bounds[i_i].eaddr = physical_mem_end; + icplb_bounds[i_i++].data = (reserved_mem_icache_on ? + SDRAM_IGENERIC : SDRAM_INON_CHBL); + } + /* Addressing hole up to BootROM. */ + icplb_bounds[i_i].eaddr = BOOT_ROM_START; + icplb_bounds[i_i++].data = 0; + /* BootROM -- largest one should be less than 1 meg. */ + icplb_bounds[i_i].eaddr = BOOT_ROM_START + (1 * 1024 * 1024); + icplb_bounds[i_i++].data = SDRAM_IGENERIC; + if (L2_LENGTH) { + /* Addressing hole up to L2 SRAM, including the async bank. */ + icplb_bounds[i_i].eaddr = L2_START; + icplb_bounds[i_i++].data = 0; + /* L2 SRAM. */ + icplb_bounds[i_i].eaddr = L2_START + L2_LENGTH; + icplb_bounds[i_i++].data = L2_IMEMORY; + } + icplb_nr_bounds = i_i; + BUG_ON(icplb_nr_bounds > ARRAY_SIZE(icplb_bounds)); } - -#endif - diff --git a/arch/blackfin/kernel/cplb-nompu/cplbmgr.S b/arch/blackfin/kernel/cplb-nompu/cplbmgr.S deleted file mode 100644 index f5cf3accef37..000000000000 --- a/arch/blackfin/kernel/cplb-nompu/cplbmgr.S +++ /dev/null @@ -1,646 +0,0 @@ -/* - * File: arch/blackfin/mach-common/cplbmgtr.S - * Based on: - * Author: LG Soft India - * - * Created: ? - * Description: CPLB replacement routine for CPLB mismatch - * - * Modified: - * Copyright 2004-2006 Analog Devices Inc. - * - * Bugs: Enter bugs at http://blackfin.uclinux.org/ - * - * 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. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see the file COPYING, or write - * to the Free Software Foundation, Inc., - * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -/* Usage: int _cplb_mgr(is_data_miss,int enable_cache) - * is_data_miss==2 => Mark as Dirty, write to the clean data page - * is_data_miss==1 => Replace a data CPLB. - * is_data_miss==0 => Replace an instruction CPLB. - * - * Returns: - * CPLB_RELOADED => Successfully updated CPLB table. - * CPLB_NO_UNLOCKED => All CPLBs are locked, so cannot be evicted. - * This indicates that the CPLBs in the configuration - * tablei are badly configured, as this should never - * occur. - * CPLB_NO_ADDR_MATCH => The address being accessed, that triggered the - * exception, is not covered by any of the CPLBs in - * the configuration table. The application is - * presumably misbehaving. - * CPLB_PROT_VIOL => The address being accessed, that triggered the - * exception, was not a first-write to a clean Write - * Back Data page, and so presumably is a genuine - * violation of the page's protection attributes. - * The application is misbehaving. - */ - -#include <linux/linkage.h> -#include <asm/blackfin.h> -#include <asm/cplb.h> - -#ifdef CONFIG_EXCPT_IRQ_SYSC_L1 -.section .l1.text -#else -.text -#endif - -.align 2; -ENTRY(_cplb_mgr) - - [--SP]=( R7:4,P5:3 ); - - CC = R0 == 2; - IF CC JUMP .Ldcplb_write; - - CC = R0 == 0; - IF !CC JUMP .Ldcplb_miss_compare; - - /* ICPLB Miss Exception. We need to choose one of the - * currently-installed CPLBs, and replace it with one - * from the configuration table. - */ - - /* A multi-word instruction can cross a page boundary. This means the - * first part of the instruction can be in a valid page, but the - * second part is not, and hence generates the instruction miss. - * However, the fault address is for the start of the instruction, - * not the part that's in the bad page. Therefore, we have to check - * whether the fault address applies to a page that is already present - * in the table. - */ - - P4.L = LO(ICPLB_FAULT_ADDR); - P4.H = HI(ICPLB_FAULT_ADDR); - - P1 = 16; - P5.L = _page_size_table; - P5.H = _page_size_table; - - P0.L = LO(ICPLB_DATA0); - P0.H = HI(ICPLB_DATA0); - R4 = [P4]; /* Get faulting address*/ - R6 = 64; /* Advance past the fault address, which*/ - R6 = R6 + R4; /* we'll use if we find a match*/ - R3 = ((16 << 8) | 2); /* Extract mask, two bits at posn 16 */ - - R5 = 0; -.Lisearch: - - R1 = [P0-0x100]; /* Address for this CPLB */ - - R0 = [P0++]; /* Info for this CPLB*/ - CC = BITTST(R0,0); /* Is the CPLB valid?*/ - IF !CC JUMP .Lnomatch; /* Skip it, if not.*/ - CC = R4 < R1(IU); /* If fault address less than page start*/ - IF CC JUMP .Lnomatch; /* then skip this one.*/ - R2 = EXTRACT(R0,R3.L) (Z); /* Get page size*/ - P1 = R2; - P1 = P5 + (P1<<2); /* index into page-size table*/ - R2 = [P1]; /* Get the page size*/ - R1 = R1 + R2; /* and add to page start, to get page end*/ - CC = R4 < R1(IU); /* and see whether fault addr is in page.*/ - IF !CC R4 = R6; /* If so, advance the address and finish loop.*/ - IF !CC JUMP .Lisearch_done; -.Lnomatch: - /* Go around again*/ - R5 += 1; - CC = BITTST(R5, 4); /* i.e CC = R5 >= 16*/ - IF !CC JUMP .Lisearch; - -.Lisearch_done: - I0 = R4; /* Fault address we'll search for*/ - - /* set up pointers */ - P0.L = LO(ICPLB_DATA0); - P0.H = HI(ICPLB_DATA0); - - /* The replacement procedure for ICPLBs */ - - P4.L = LO(IMEM_CONTROL); - P4.H = HI(IMEM_CONTROL); - - /* Turn off CPLBs while we work, necessary according to HRM before - * modifying CPLB descriptors - */ - R5 = [P4]; /* Control Register*/ - BITCLR(R5,ENICPLB_P); - CLI R1; - SSYNC; /* SSYNC required before writing to IMEM_CONTROL. */ - .align 8; - [P4] = R5; - SSYNC; - STI R1; - - R1 = -1; /* end point comparison */ - R3 = 16; /* counter */ - - /* Search through CPLBs for first non-locked entry */ - /* Overwrite it by moving everyone else up by 1 */ -.Licheck_lock: - R0 = [P0++]; - R3 = R3 + R1; - CC = R3 == R1; - IF CC JUMP .Lall_locked; - CC = BITTST(R0, 0); /* an invalid entry is good */ - IF !CC JUMP .Lifound_victim; - CC = BITTST(R0,1); /* but a locked entry isn't */ - IF CC JUMP .Licheck_lock; - -.Lifound_victim: -#ifdef CONFIG_CPLB_INFO - R7 = [P0 - 0x104]; - P2.L = _ipdt_table; - P2.H = _ipdt_table; - P3.L = _ipdt_swapcount_table; - P3.H = _ipdt_swapcount_table; - P3 += -4; -.Licount: - R2 = [P2]; /* address from config table */ - P2 += 8; - P3 += 8; - CC = R2==-1; - IF CC JUMP .Licount_done; - CC = R7==R2; - IF !CC JUMP .Licount; - R7 = [P3]; - R7 += 1; - [P3] = R7; - CSYNC; -.Licount_done: -#endif - LC0=R3; - LSETUP(.Lis_move,.Lie_move) LC0; -.Lis_move: - R0 = [P0]; - [P0 - 4] = R0; - R0 = [P0 - 0x100]; - [P0-0x104] = R0; -.Lie_move: - P0+=4; - - /* Clear ICPLB_DATA15, in case we don't find a replacement - * otherwise, we would have a duplicate entry, and will crash - */ - R0 = 0; - [P0 - 4] = R0; - - /* We've made space in the ICPLB table, so that ICPLB15 - * is now free to be overwritten. Next, we have to determine - * which CPLB we need to install, from the configuration - * table. This is a matter of getting the start-of-page - * addresses and page-lengths from the config table, and - * determining whether the fault address falls within that - * range. - */ - - P2.L = _ipdt_table; - P2.H = _ipdt_table; -#ifdef CONFIG_CPLB_INFO - P3.L = _ipdt_swapcount_table; - P3.H = _ipdt_swapcount_table; - P3 += -8; -#endif - P0.L = _page_size_table; - P0.H = _page_size_table; - - /* Retrieve our fault address (which may have been advanced - * because the faulting instruction crossed a page boundary). - */ - - R0 = I0; - - /* An extraction pattern, to get the page-size bits from - * the CPLB data entry. Bits 16-17, so two bits at posn 16. - */ - - R1 = ((16<<8)|2); -.Linext: R4 = [P2++]; /* address from config table */ - R2 = [P2++]; /* data from config table */ -#ifdef CONFIG_CPLB_INFO - P3 += 8; -#endif - - CC = R4 == -1; /* End of config table*/ - IF CC JUMP .Lno_page_in_table; - - /* See if failed address > start address */ - CC = R4 <= R0(IU); - IF !CC JUMP .Linext; - - /* extract page size (17:16)*/ - R3 = EXTRACT(R2, R1.L) (Z); - - /* add page size to addr to get range */ - - P5 = R3; - P5 = P0 + (P5 << 2); /* scaled, for int access*/ - R3 = [P5]; - R3 = R3 + R4; - - /* See if failed address < (start address + page size) */ - CC = R0 < R3(IU); - IF !CC JUMP .Linext; - - /* We've found a CPLB in the config table that covers - * the faulting address, so install this CPLB into the - * last entry of the table. - */ - - P1.L = LO(ICPLB_DATA15); /* ICPLB_DATA15 */ - P1.H = HI(ICPLB_DATA15); - [P1] = R2; - [P1-0x100] = R4; -#ifdef CONFIG_CPLB_INFO - R3 = [P3]; - R3 += 1; - [P3] = R3; -#endif - - /* P4 points to IMEM_CONTROL, and R5 contains its old - * value, after we disabled ICPLBS. Re-enable them. - */ - - BITSET(R5,ENICPLB_P); - CLI R2; - SSYNC; /* SSYNC required before writing to IMEM_CONTROL. */ - .align 8; - [P4] = R5; - SSYNC; - STI R2; - - ( R7:4,P5:3 ) = [SP++]; - R0 = CPLB_RELOADED; - RTS; - -/* FAILED CASES*/ -.Lno_page_in_table: - R0 = CPLB_NO_ADDR_MATCH; - JUMP .Lfail_ret; - -.Lall_locked: - R0 = CPLB_NO_UNLOCKED; - JUMP .Lfail_ret; - -.Lprot_violation: - R0 = CPLB_PROT_VIOL; - -.Lfail_ret: - /* Make sure we turn protection/cache back on, even in the failing case */ - BITSET(R5,ENICPLB_P); - CLI R2; - SSYNC; /* SSYNC required before writing to IMEM_CONTROL. */ - .align 8; - [P4] = R5; - SSYNC; - STI R2; - - ( R7:4,P5:3 ) = [SP++]; - RTS; - -.Ldcplb_write: - - /* if a DCPLB is marked as write-back (CPLB_WT==0), and - * it is clean (CPLB_DIRTY==0), then a write to the - * CPLB's page triggers a protection violation. We have to - * mark the CPLB as dirty, to indicate that there are - * pending writes associated with the CPLB. - */ - - P4.L = LO(DCPLB_STATUS); - P4.H = HI(DCPLB_STATUS); - P3.L = LO(DCPLB_DATA0); - P3.H = HI(DCPLB_DATA0); - R5 = [P4]; - - /* A protection violation can be caused by more than just writes - * to a clean WB page, so we have to ensure that: - * - It's a write - * - to a clean WB page - * - and is allowed in the mode the access occurred. - */ - - CC = BITTST(R5, 16); /* ensure it was a write*/ - IF !CC JUMP .Lprot_violation; - - /* to check the rest, we have to retrieve the DCPLB.*/ - - /* The low half of DCPLB_STATUS is a bit mask*/ - - R2 = R5.L (Z); /* indicating which CPLB triggered the event.*/ - R3 = 30; /* so we can use this to determine the offset*/ - R2.L = SIGNBITS R2; - R2 = R2.L (Z); /* into the DCPLB table.*/ - R3 = R3 - R2; - P4 = R3; - P3 = P3 + (P4<<2); - R3 = [P3]; /* Retrieve the CPLB*/ - - /* Now we can check whether it's a clean WB page*/ - - CC = BITTST(R3, 14); /* 0==WB, 1==WT*/ - IF CC JUMP .Lprot_violation; - CC = BITTST(R3, 7); /* 0 == clean, 1 == dirty*/ - IF CC JUMP .Lprot_violation; - - /* Check whether the write is allowed in the mode that was active.*/ - - R2 = 1<<3; /* checking write in user mode*/ - CC = BITTST(R5, 17); /* 0==was user, 1==was super*/ - R5 = CC; - R2 <<= R5; /* if was super, check write in super mode*/ - R2 = R3 & R2; - CC = R2 == 0; - IF CC JUMP .Lprot_violation; - - /* It's a genuine write-to-clean-page.*/ - - BITSET(R3, 7); /* mark as dirty*/ - [P3] = R3; /* and write back.*/ - NOP; - CSYNC; - ( R7:4,P5:3 ) = [SP++]; - R0 = CPLB_RELOADED; - RTS; - -.Ldcplb_miss_compare: - - /* Data CPLB Miss event. We need to choose a CPLB to - * evict, and then locate a new CPLB to install from the - * config table, that covers the faulting address. - */ - - P1.L = LO(DCPLB_DATA15); - P1.H = HI(DCPLB_DATA15); - - P4.L = LO(DCPLB_FAULT_ADDR); - P4.H = HI(DCPLB_FAULT_ADDR); - R4 = [P4]; - I0 = R4; - - /* The replacement procedure for DCPLBs*/ - - R6 = R1; /* Save for later*/ - - /* Turn off CPLBs while we work.*/ - P4.L = LO(DMEM_CONTROL); - P4.H = HI(DMEM_CONTROL); - R5 = [P4]; - BITCLR(R5,ENDCPLB_P); - CLI R0; - SSYNC; /* SSYNC required before writing to DMEM_CONTROL. */ - .align 8; - [P4] = R5; - SSYNC; - STI R0; - - /* Start looking for a CPLB to evict. Our order of preference - * is: invalid CPLBs, clean CPLBs, dirty CPLBs. Locked CPLBs - * are no good. - */ - - I1.L = LO(DCPLB_DATA0); - I1.H = HI(DCPLB_DATA0); - P1 = 2; - P2 = 16; - I2.L = _dcplb_preference; - I2.H = _dcplb_preference; - LSETUP(.Lsdsearch1, .Ledsearch1) LC0 = P1; -.Lsdsearch1: - R0 = [I2++]; /* Get the bits we're interested in*/ - P0 = I1; /* Go back to start of table*/ - LSETUP (.Lsdsearch2, .Ledsearch2) LC1 = P2; -.Lsdsearch2: - R1 = [P0++]; /* Fetch each installed CPLB in turn*/ - R2 = R1 & R0; /* and test for interesting bits.*/ - CC = R2 == 0; /* If none are set, it'll do.*/ - IF !CC JUMP .Lskip_stack_check; - - R2 = [P0 - 0x104]; /* R2 - PageStart */ - P3.L = _page_size_table; /* retrieve end address */ - P3.H = _page_size_table; /* retrieve end address */ - R3 = 0x1002; /* 16th - position, 2 bits -length */ -#if ANOMALY_05000209 - nop; /* Anomaly 05000209 */ -#endif - R7 = EXTRACT(R1,R3.l); - R7 = R7 << 2; /* Page size index offset */ - P5 = R7; - P3 = P3 + P5; - R7 = [P3]; /* page size in bytes */ - - R7 = R2 + R7; /* R7 - PageEnd */ - R4 = SP; /* Test SP is in range */ - - CC = R7 < R4; /* if PageEnd < SP */ - IF CC JUMP .Ldfound_victim; - R3 = 0x284; /* stack length from start of trap till - * the point. - * 20 stack locations for future modifications - */ - R4 = R4 + R3; - CC = R4 < R2; /* if SP + stacklen < PageStart */ - IF CC JUMP .Ldfound_victim; -.Lskip_stack_check: - -.Ledsearch2: NOP; -.Ledsearch1: NOP; - - /* If we got here, we didn't find a DCPLB we considered - * replacable, which means all of them were locked. - */ - - JUMP .Lall_locked; -.Ldfound_victim: - -#ifdef CONFIG_CPLB_INFO - R7 = [P0 - 0x104]; - P2.L = _dpdt_table; - P2.H = _dpdt_table; - P3.L = _dpdt_swapcount_table; - P3.H = _dpdt_swapcount_table; - P3 += -4; -.Ldicount: - R2 = [P2]; - P2 += 8; - P3 += 8; - CC = R2==-1; - IF CC JUMP .Ldicount_done; - CC = R7==R2; - IF !CC JUMP .Ldicount; - R7 = [P3]; - R7 += 1; - [P3] = R7; -.Ldicount_done: -#endif - - /* Clean down the hardware loops*/ - R2 = 0; - LC1 = R2; - LC0 = R2; - - /* There's a suitable victim in [P0-4] (because we've - * advanced already). - */ - -.LDdoverwrite: - - /* [P0-4] is a suitable victim CPLB, so we want to - * overwrite it by moving all the following CPLBs - * one space closer to the start. - */ - - R1.L = LO(DCPLB_DATA16); /* DCPLB_DATA15 + 4 */ - R1.H = HI(DCPLB_DATA16); - R0 = P0; - - /* If the victim happens to be in DCPLB15, - * we don't need to move anything. - */ - - CC = R1 == R0; - IF CC JUMP .Lde_moved; - R1 = R1 - R0; - R1 >>= 2; - P1 = R1; - LSETUP(.Lds_move, .Lde_move) LC0=P1; -.Lds_move: - R0 = [P0++]; /* move data */ - [P0 - 8] = R0; - R0 = [P0-0x104] /* move address */ -.Lde_move: - [P0-0x108] = R0; - -.Lde_moved: - NOP; - - /* Clear DCPLB_DATA15, in case we don't find a replacement - * otherwise, we would have a duplicate entry, and will crash - */ - R0 = 0; - [P0 - 0x4] = R0; - - /* We've now made space in DCPLB15 for the new CPLB to be - * installed. The next stage is to locate a CPLB in the - * config table that covers the faulting address. - */ - - R0 = I0; /* Our faulting address */ - - P2.L = _dpdt_table; - P2.H = _dpdt_table; -#ifdef CONFIG_CPLB_INFO - P3.L = _dpdt_swapcount_table; - P3.H = _dpdt_swapcount_table; - P3 += -8; -#endif - - P1.L = _page_size_table; - P1.H = _page_size_table; - - /* An extraction pattern, to retrieve bits 17:16.*/ - - R1 = (16<<8)|2; -.Ldnext: R4 = [P2++]; /* address */ - R2 = [P2++]; /* data */ -#ifdef CONFIG_CPLB_INFO - P3 += 8; -#endif - - CC = R4 == -1; - IF CC JUMP .Lno_page_in_table; - - /* See if failed address > start address */ - CC = R4 <= R0(IU); - IF !CC JUMP .Ldnext; - - /* extract page size (17:16)*/ - R3 = EXTRACT(R2, R1.L) (Z); - - /* add page size to addr to get range */ - - P5 = R3; - P5 = P1 + (P5 << 2); - R3 = [P5]; - R3 = R3 + R4; - - /* See if failed address < (start address + page size) */ - CC = R0 < R3(IU); - IF !CC JUMP .Ldnext; - - /* We've found the CPLB that should be installed, so - * write it into CPLB15, masking off any caching bits - * if necessary. - */ - - P1.L = LO(DCPLB_DATA15); - P1.H = HI(DCPLB_DATA15); - - /* If the DCPLB has cache bits set, but caching hasn't - * been enabled, then we want to mask off the cache-in-L1 - * bit before installing. Moreover, if caching is off, we - * also want to ensure that the DCPLB has WT mode set, rather - * than WB, since WB pages still trigger first-write exceptions - * even when not caching is off, and the page isn't marked as - * cachable. Finally, we could mark the page as clean, not dirty, - * but we choose to leave that decision to the user; if the user - * chooses to have a CPLB pre-defined as dirty, then they always - * pay the cost of flushing during eviction, but don't pay the - * cost of first-write exceptions to mark the page as dirty. - */ - -#ifdef CONFIG_BFIN_WT - BITSET(R6, 14); /* Set WT*/ -#endif - - [P1] = R2; - [P1-0x100] = R4; -#ifdef CONFIG_CPLB_INFO - R3 = [P3]; - R3 += 1; - [P3] = R3; -#endif - - /* We've installed the CPLB, so re-enable CPLBs. P4 - * points to DMEM_CONTROL, and R5 is the value we - * last wrote to it, when we were disabling CPLBs. - */ - - BITSET(R5,ENDCPLB_P); - CLI R2; - .align 8; - [P4] = R5; - SSYNC; - STI R2; - - ( R7:4,P5:3 ) = [SP++]; - R0 = CPLB_RELOADED; - RTS; -ENDPROC(_cplb_mgr) - -.data -.align 4; -_page_size_table: -.byte4 0x00000400; /* 1K */ -.byte4 0x00001000; /* 4K */ -.byte4 0x00100000; /* 1M */ -.byte4 0x00400000; /* 4M */ - -.align 4; -_dcplb_preference: -.byte4 0x00000001; /* valid bit */ -.byte4 0x00000002; /* lock bit */ diff --git a/arch/blackfin/kernel/cplb-nompu/cplbmgr.c b/arch/blackfin/kernel/cplb-nompu/cplbmgr.c new file mode 100644 index 000000000000..376249ab2694 --- /dev/null +++ b/arch/blackfin/kernel/cplb-nompu/cplbmgr.c @@ -0,0 +1,283 @@ +/* + * File: arch/blackfin/kernel/cplb-nompu-c/cplbmgr.c + * Based on: arch/blackfin/kernel/cplb-mpu/cplbmgr.c + * Author: Michael McTernan <mmcternan@airvana.com> + * + * Created: 01Nov2008 + * Description: CPLB miss handler. + * + * Modified: + * Copyright 2008 Airvana Inc. + * Copyright 2004-2007 Analog Devices Inc. + * + * Bugs: Enter bugs at http://blackfin.uclinux.org/ + * + * 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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/kernel.h> +#include <asm/blackfin.h> +#include <asm/cplbinit.h> +#include <asm/cplb.h> +#include <asm/mmu_context.h> + +/* + * WARNING + * + * This file is compiled with certain -ffixed-reg options. We have to + * make sure not to call any functions here that could clobber these + * registers. + */ + +int nr_dcplb_miss[NR_CPUS], nr_icplb_miss[NR_CPUS]; +int nr_dcplb_supv_miss[NR_CPUS], nr_icplb_supv_miss[NR_CPUS]; +int nr_cplb_flush[NR_CPUS], nr_dcplb_prot[NR_CPUS]; + +#ifdef CONFIG_EXCPT_IRQ_SYSC_L1 +#define MGR_ATTR __attribute__((l1_text)) +#else +#define MGR_ATTR +#endif + +/* + * We're in an exception handler. The normal cli nop nop workaround + * isn't going to do very much, as the only thing that can interrupt + * us is an NMI, and the cli isn't going to stop that. + */ +#define NOWA_SSYNC __asm__ __volatile__ ("ssync;") + +/* Anomaly handlers provide SSYNCs, so avoid extra if anomaly is present */ +#if ANOMALY_05000125 + +#define bfin_write_DMEM_CONTROL_SSYNC(v) bfin_write_DMEM_CONTROL(v) +#define bfin_write_IMEM_CONTROL_SSYNC(v) bfin_write_IMEM_CONTROL(v) + +#else + +#define bfin_write_DMEM_CONTROL_SSYNC(v) \ + do { NOWA_SSYNC; bfin_write_DMEM_CONTROL(v); NOWA_SSYNC; } while (0) +#define bfin_write_IMEM_CONTROL_SSYNC(v) \ + do { NOWA_SSYNC; bfin_write_IMEM_CONTROL(v); NOWA_SSYNC; } while (0) + +#endif + +static inline void write_dcplb_data(int cpu, int idx, unsigned long data, + unsigned long addr) +{ + unsigned long ctrl = bfin_read_DMEM_CONTROL(); + bfin_write_DMEM_CONTROL_SSYNC(ctrl & ~ENDCPLB); + bfin_write32(DCPLB_DATA0 + idx * 4, data); + bfin_write32(DCPLB_ADDR0 + idx * 4, addr); + bfin_write_DMEM_CONTROL_SSYNC(ctrl); + +#ifdef CONFIG_CPLB_INFO + dcplb_tbl[cpu][idx].addr = addr; + dcplb_tbl[cpu][idx].data = data; +#endif +} + +static inline void write_icplb_data(int cpu, int idx, unsigned long data, + unsigned long addr) +{ + unsigned long ctrl = bfin_read_IMEM_CONTROL(); + + bfin_write_IMEM_CONTROL_SSYNC(ctrl & ~ENICPLB); + bfin_write32(ICPLB_DATA0 + idx * 4, data); + bfin_write32(ICPLB_ADDR0 + idx * 4, addr); + bfin_write_IMEM_CONTROL_SSYNC(ctrl); + +#ifdef CONFIG_CPLB_INFO + icplb_tbl[cpu][idx].addr = addr; + icplb_tbl[cpu][idx].data = data; +#endif +} + +/* + * Given the contents of the status register, return the index of the + * CPLB that caused the fault. + */ +static inline int faulting_cplb_index(int status) +{ + int signbits = __builtin_bfin_norm_fr1x32(status & 0xFFFF); + return 30 - signbits; +} + +/* + * Given the contents of the status register and the DCPLB_DATA contents, + * return true if a write access should be permitted. + */ +static inline int write_permitted(int status, unsigned long data) +{ + if (status & FAULT_USERSUPV) + return !!(data & CPLB_SUPV_WR); + else + return !!(data & CPLB_USER_WR); +} + +/* Counters to implement round-robin replacement. */ +static int icplb_rr_index[NR_CPUS] PDT_ATTR; +static int dcplb_rr_index[NR_CPUS] PDT_ATTR; + +/* + * Find an ICPLB entry to be evicted and return its index. + */ +static int evict_one_icplb(int cpu) +{ + int i = first_switched_icplb + icplb_rr_index[cpu]; + if (i >= MAX_CPLBS) { + i -= MAX_CPLBS - first_switched_icplb; + icplb_rr_index[cpu] -= MAX_CPLBS - first_switched_icplb; + } + icplb_rr_index[cpu]++; + return i; +} + +static int evict_one_dcplb(int cpu) +{ + int i = first_switched_dcplb + dcplb_rr_index[cpu]; + if (i >= MAX_CPLBS) { + i -= MAX_CPLBS - first_switched_dcplb; + dcplb_rr_index[cpu] -= MAX_CPLBS - first_switched_dcplb; + } + dcplb_rr_index[cpu]++; + return i; +} + +MGR_ATTR static int icplb_miss(int cpu) +{ + unsigned long addr = bfin_read_ICPLB_FAULT_ADDR(); + int status = bfin_read_ICPLB_STATUS(); + int idx; + unsigned long i_data, base, addr1, eaddr; + + nr_icplb_miss[cpu]++; + if (unlikely(status & FAULT_USERSUPV)) + nr_icplb_supv_miss[cpu]++; + + base = 0; + for (idx = 0; idx < icplb_nr_bounds; idx++) { + eaddr = icplb_bounds[idx].eaddr; + if (addr < eaddr) + break; + base = eaddr; + } + if (unlikely(idx == icplb_nr_bounds)) + return CPLB_NO_ADDR_MATCH; + + i_data = icplb_bounds[idx].data; + if (unlikely(i_data == 0)) + return CPLB_NO_ADDR_MATCH; + + addr1 = addr & ~(SIZE_4M - 1); + addr &= ~(SIZE_1M - 1); + i_data |= PAGE_SIZE_1MB; + if (addr1 >= base && (addr1 + SIZE_4M) <= eaddr) { + /* + * This works because + * (PAGE_SIZE_4MB & PAGE_SIZE_1MB) == PAGE_SIZE_1MB. + */ + i_data |= PAGE_SIZE_4MB; + addr = addr1; + } + + /* Pick entry to evict */ + idx = evict_one_icplb(cpu); + + write_icplb_data(cpu, idx, i_data, addr); + + return CPLB_RELOADED; +} + +MGR_ATTR static int dcplb_miss(int cpu) +{ + unsigned long addr = bfin_read_DCPLB_FAULT_ADDR(); + int status = bfin_read_DCPLB_STATUS(); + int idx; + unsigned long d_data, base, addr1, eaddr; + + nr_dcplb_miss[cpu]++; + if (unlikely(status & FAULT_USERSUPV)) + nr_dcplb_supv_miss[cpu]++; + + base = 0; + for (idx = 0; idx < dcplb_nr_bounds; idx++) { + eaddr = dcplb_bounds[idx].eaddr; + if (addr < eaddr) + break; + base = eaddr; + } + if (unlikely(idx == dcplb_nr_bounds)) + return CPLB_NO_ADDR_MATCH; + + d_data = dcplb_bounds[idx].data; + if (unlikely(d_data == 0)) + return CPLB_NO_ADDR_MATCH; + + addr1 = addr & ~(SIZE_4M - 1); + addr &= ~(SIZE_1M - 1); + d_data |= PAGE_SIZE_1MB; + if (addr1 >= base && (addr1 + SIZE_4M) <= eaddr) { + /* + * This works because + * (PAGE_SIZE_4MB & PAGE_SIZE_1MB) == PAGE_SIZE_1MB. + */ + d_data |= PAGE_SIZE_4MB; + addr = addr1; + } + + /* Pick entry to evict */ + idx = evict_one_dcplb(cpu); + + write_dcplb_data(cpu, idx, d_data, addr); + + return CPLB_RELOADED; +} + +MGR_ATTR static noinline int dcplb_protection_fault(int cpu) +{ + int status = bfin_read_DCPLB_STATUS(); + + nr_dcplb_prot[cpu]++; + + if (likely(status & FAULT_RW)) { + int idx = faulting_cplb_index(status); + unsigned long regaddr = DCPLB_DATA0 + idx * 4; + unsigned long data = bfin_read32(regaddr); + + /* Check if fault is to dirty a clean page */ + if (!(data & CPLB_WT) && !(data & CPLB_DIRTY) && + write_permitted(status, data)) { + + dcplb_tbl[cpu][idx].data = data; + bfin_write32(regaddr, data); + return CPLB_RELOADED; + } + } + + return CPLB_PROT_VIOL; +} + +MGR_ATTR int cplb_hdr(int seqstat, struct pt_regs *regs) +{ + int cause = seqstat & 0x3f; + unsigned int cpu = smp_processor_id(); + switch (cause) { + case 0x2C: + return icplb_miss(cpu); + case 0x26: + return dcplb_miss(cpu); + default: + if (unlikely(cause == 0x23)) + return dcplb_protection_fault(cpu); + + return CPLB_UNKNOWN_ERR; + } +} diff --git a/arch/blackfin/kernel/cplbinfo.c b/arch/blackfin/kernel/cplbinfo.c new file mode 100644 index 000000000000..64d78300dd08 --- /dev/null +++ b/arch/blackfin/kernel/cplbinfo.c @@ -0,0 +1,177 @@ +/* + * arch/blackfin/kernel/cplbinfo.c - display CPLB status + * + * Copyright 2004-2008 Analog Devices Inc. + * Licensed under the GPL-2 or later. + */ + +#include <linux/ctype.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/proc_fs.h> +#include <linux/seq_file.h> +#include <linux/uaccess.h> + +#include <asm/cplbinit.h> +#include <asm/blackfin.h> + +static char const page_strtbl[][3] = { "1K", "4K", "1M", "4M" }; +#define page(flags) (((flags) & 0x30000) >> 16) +#define strpage(flags) page_strtbl[page(flags)] + +struct cplbinfo_data { + loff_t pos; + char cplb_type; + u32 mem_control; + struct cplb_entry *tbl; + int switched; +}; + +static void cplbinfo_print_header(struct seq_file *m) +{ + seq_printf(m, "Index\tAddress\t\tData\tSize\tU/RD\tU/WR\tS/WR\tSwitch\n"); +} + +static int cplbinfo_nomore(struct cplbinfo_data *cdata) +{ + return cdata->pos >= MAX_CPLBS; +} + +static int cplbinfo_show(struct seq_file *m, void *p) +{ + struct cplbinfo_data *cdata; + unsigned long data, addr; + loff_t pos; + + cdata = p; + pos = cdata->pos; + addr = cdata->tbl[pos].addr; + data = cdata->tbl[pos].data; + + seq_printf(m, + "%d\t0x%08lx\t%05lx\t%s\t%c\t%c\t%c\t%c\n", + (int)pos, addr, data, strpage(data), + (data & CPLB_USER_RD) ? 'Y' : 'N', + (data & CPLB_USER_WR) ? 'Y' : 'N', + (data & CPLB_SUPV_WR) ? 'Y' : 'N', + pos < cdata->switched ? 'N' : 'Y'); + + return 0; +} + +static void cplbinfo_seq_init(struct cplbinfo_data *cdata, unsigned int cpu) +{ + if (cdata->cplb_type == 'I') { + cdata->mem_control = bfin_read_IMEM_CONTROL(); + cdata->tbl = icplb_tbl[cpu]; + cdata->switched = first_switched_icplb; + } else { + cdata->mem_control = bfin_read_DMEM_CONTROL(); + cdata->tbl = dcplb_tbl[cpu]; + cdata->switched = first_switched_dcplb; + } +} + +static void *cplbinfo_start(struct seq_file *m, loff_t *pos) +{ + struct cplbinfo_data *cdata = m->private; + + if (!*pos) { + seq_printf(m, "%cCPLBs are %sabled: 0x%x\n", cdata->cplb_type, + (cdata->mem_control & ENDCPLB ? "en" : "dis"), + cdata->mem_control); + cplbinfo_print_header(m); + } else if (cplbinfo_nomore(cdata)) + return NULL; + + get_cpu(); + return cdata; +} + +static void *cplbinfo_next(struct seq_file *m, void *p, loff_t *pos) +{ + struct cplbinfo_data *cdata = p; + cdata->pos = ++(*pos); + if (cplbinfo_nomore(cdata)) + return NULL; + else + return cdata; +} + +static void cplbinfo_stop(struct seq_file *m, void *p) +{ + put_cpu(); +} + +static const struct seq_operations cplbinfo_sops = { + .start = cplbinfo_start, + .next = cplbinfo_next, + .stop = cplbinfo_stop, + .show = cplbinfo_show, +}; + +static int cplbinfo_open(struct inode *inode, struct file *file) +{ + char buf[256], *path, *p; + unsigned int cpu; + char *s_cpu, *s_cplb; + int ret; + struct seq_file *m; + struct cplbinfo_data *cdata; + + path = d_path(&file->f_path, buf, sizeof(buf)); + if (IS_ERR(path)) + return PTR_ERR(path); + s_cpu = strstr(path, "/cpu"); + s_cplb = strrchr(path, '/'); + if (!s_cpu || !s_cplb) + return -EINVAL; + + cpu = simple_strtoul(s_cpu + 4, &p, 10); + if (!cpu_online(cpu)) + return -ENODEV; + + ret = seq_open_private(file, &cplbinfo_sops, sizeof(*cdata)); + if (ret) + return ret; + m = file->private_data; + cdata = m->private; + + cdata->pos = 0; + cdata->cplb_type = toupper(s_cplb[1]); + cplbinfo_seq_init(cdata, cpu); + + return 0; +} + +static const struct file_operations cplbinfo_fops = { + .open = cplbinfo_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release_private, +}; + +static int __init cplbinfo_init(void) +{ + struct proc_dir_entry *cplb_dir, *cpu_dir; + char buf[10]; + unsigned int cpu; + + cplb_dir = proc_mkdir("cplbinfo", NULL); + if (!cplb_dir) + return -ENOMEM; + + for_each_possible_cpu(cpu) { + sprintf(buf, "cpu%i", cpu); + cpu_dir = proc_mkdir(buf, cplb_dir); + if (!cpu_dir) + return -ENOMEM; + + proc_create("icplb", S_IRUGO, cpu_dir, &cplbinfo_fops); + proc_create("dcplb", S_IRUGO, cpu_dir, &cplbinfo_fops); + } + + return 0; +} +late_initcall(cplbinfo_init); diff --git a/arch/blackfin/kernel/early_printk.c b/arch/blackfin/kernel/early_printk.c index 1f4e3d2e0901..c8ad051742e2 100644 --- a/arch/blackfin/kernel/early_printk.c +++ b/arch/blackfin/kernel/early_printk.c @@ -105,10 +105,10 @@ static struct console * __init earlyserial_init(char *buf) cflag |= CS5; break; case 6: - cflag |= CS5; + cflag |= CS6; break; case 7: - cflag |= CS5; + cflag |= CS7; break; default: cflag |= CS8; diff --git a/arch/blackfin/kernel/entry.S b/arch/blackfin/kernel/entry.S index faea88ebb2ef..a9cfba9946b5 100644 --- a/arch/blackfin/kernel/entry.S +++ b/arch/blackfin/kernel/entry.S @@ -30,6 +30,7 @@ #include <linux/linkage.h> #include <asm/thread_info.h> #include <asm/errno.h> +#include <asm/blackfin.h> #include <asm/asm-offsets.h> #include <asm/context.S> @@ -41,6 +42,10 @@ #endif ENTRY(_ret_from_fork) +#ifdef CONFIG_IPIPE + [--sp] = reti; /* IRQs on. */ + SP += 4; +#endif /* CONFIG_IPIPE */ SP += -12; call _schedule_tail; SP += 12; diff --git a/arch/blackfin/kernel/fixed_code.S b/arch/blackfin/kernel/fixed_code.S index 4b03ba025488..0d2d9e0968c8 100644 --- a/arch/blackfin/kernel/fixed_code.S +++ b/arch/blackfin/kernel/fixed_code.S @@ -8,10 +8,12 @@ * BF561 SMP). */ #include <linux/linkage.h> +#include <linux/init.h> #include <linux/unistd.h> #include <asm/entry.h> -.text +__INIT + ENTRY(_fixed_code_start) .align 16 @@ -144,3 +146,5 @@ ENTRY(_safe_user_instruction) ENDPROC(_safe_user_instruction) ENTRY(_fixed_code_end) + +__FINIT diff --git a/arch/blackfin/kernel/ipipe.c b/arch/blackfin/kernel/ipipe.c new file mode 100644 index 000000000000..339be5a3ae6a --- /dev/null +++ b/arch/blackfin/kernel/ipipe.c @@ -0,0 +1,428 @@ +/* -*- linux-c -*- + * linux/arch/blackfin/kernel/ipipe.c + * + * Copyright (C) 2005-2007 Philippe Gerum. + * + * 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, Inc., 675 Mass Ave, Cambridge MA 02139, + * USA; either version 2 of the License, or (at your option) any later + * version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + * Architecture-dependent I-pipe support for the Blackfin. + */ + +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/percpu.h> +#include <linux/bitops.h> +#include <linux/slab.h> +#include <linux/errno.h> +#include <linux/kthread.h> +#include <asm/unistd.h> +#include <asm/system.h> +#include <asm/atomic.h> +#include <asm/io.h> + +static int create_irq_threads; + +DEFINE_PER_CPU(struct pt_regs, __ipipe_tick_regs); + +static DEFINE_PER_CPU(unsigned long, pending_irqthread_mask); + +static DEFINE_PER_CPU(int [IVG13 + 1], pending_irq_count); + +asmlinkage void asm_do_IRQ(unsigned int irq, struct pt_regs *regs); + +static void __ipipe_no_irqtail(void); + +unsigned long __ipipe_irq_tail_hook = (unsigned long)&__ipipe_no_irqtail; +EXPORT_SYMBOL(__ipipe_irq_tail_hook); + +unsigned long __ipipe_core_clock; +EXPORT_SYMBOL(__ipipe_core_clock); + +unsigned long __ipipe_freq_scale; +EXPORT_SYMBOL(__ipipe_freq_scale); + +atomic_t __ipipe_irq_lvdepth[IVG15 + 1]; + +unsigned long __ipipe_irq_lvmask = __all_masked_irq_flags; +EXPORT_SYMBOL(__ipipe_irq_lvmask); + +static void __ipipe_ack_irq(unsigned irq, struct irq_desc *desc) +{ + desc->ipipe_ack(irq, desc); +} + +/* + * __ipipe_enable_pipeline() -- We are running on the boot CPU, hw + * interrupts are off, and secondary CPUs are still lost in space. + */ +void __ipipe_enable_pipeline(void) +{ + unsigned irq; + + __ipipe_core_clock = get_cclk(); /* Fetch this once. */ + __ipipe_freq_scale = 1000000000UL / __ipipe_core_clock; + + for (irq = 0; irq < NR_IRQS; ++irq) + ipipe_virtualize_irq(ipipe_root_domain, + irq, + (ipipe_irq_handler_t)&asm_do_IRQ, + NULL, + &__ipipe_ack_irq, + IPIPE_HANDLE_MASK | IPIPE_PASS_MASK); +} + +/* + * __ipipe_handle_irq() -- IPIPE's generic IRQ handler. An optimistic + * interrupt protection log is maintained here for each domain. Hw + * interrupts are masked on entry. + */ +void __ipipe_handle_irq(unsigned irq, struct pt_regs *regs) +{ + struct ipipe_domain *this_domain, *next_domain; + struct list_head *head, *pos; + int m_ack, s = -1; + + /* + * Software-triggered IRQs do not need any ack. The contents + * of the register frame should only be used when processing + * the timer interrupt, but not for handling any other + * interrupt. + */ + m_ack = (regs == NULL || irq == IRQ_SYSTMR || irq == IRQ_CORETMR); + + this_domain = ipipe_current_domain; + + if (unlikely(test_bit(IPIPE_STICKY_FLAG, &this_domain->irqs[irq].control))) + head = &this_domain->p_link; + else { + head = __ipipe_pipeline.next; + next_domain = list_entry(head, struct ipipe_domain, p_link); + if (likely(test_bit(IPIPE_WIRED_FLAG, &next_domain->irqs[irq].control))) { + if (!m_ack && next_domain->irqs[irq].acknowledge != NULL) + next_domain->irqs[irq].acknowledge(irq, irq_desc + irq); + if (test_bit(IPIPE_ROOTLOCK_FLAG, &ipipe_root_domain->flags)) + s = __test_and_set_bit(IPIPE_STALL_FLAG, + &ipipe_root_cpudom_var(status)); + __ipipe_dispatch_wired(next_domain, irq); + goto finalize; + return; + } + } + + /* Ack the interrupt. */ + + pos = head; + + while (pos != &__ipipe_pipeline) { + next_domain = list_entry(pos, struct ipipe_domain, p_link); + /* + * For each domain handling the incoming IRQ, mark it + * as pending in its log. + */ + if (test_bit(IPIPE_HANDLE_FLAG, &next_domain->irqs[irq].control)) { + /* + * Domains that handle this IRQ are polled for + * acknowledging it by decreasing priority + * order. The interrupt must be made pending + * _first_ in the domain's status flags before + * the PIC is unlocked. + */ + __ipipe_set_irq_pending(next_domain, irq); + + if (!m_ack && next_domain->irqs[irq].acknowledge != NULL) { + next_domain->irqs[irq].acknowledge(irq, irq_desc + irq); + m_ack = 1; + } + } + + /* + * If the domain does not want the IRQ to be passed + * down the interrupt pipe, exit the loop now. + */ + if (!test_bit(IPIPE_PASS_FLAG, &next_domain->irqs[irq].control)) + break; + + pos = next_domain->p_link.next; + } + + /* + * Now walk the pipeline, yielding control to the highest + * priority domain that has pending interrupt(s) or + * immediately to the current domain if the interrupt has been + * marked as 'sticky'. This search does not go beyond the + * current domain in the pipeline. We also enforce the + * additional root stage lock (blackfin-specific). */ + + if (test_bit(IPIPE_ROOTLOCK_FLAG, &ipipe_root_domain->flags)) + s = __test_and_set_bit(IPIPE_STALL_FLAG, + &ipipe_root_cpudom_var(status)); +finalize: + + __ipipe_walk_pipeline(head); + + if (!s) + __clear_bit(IPIPE_STALL_FLAG, + &ipipe_root_cpudom_var(status)); +} + +int __ipipe_check_root(void) +{ + return ipipe_root_domain_p; +} + +void __ipipe_enable_irqdesc(struct ipipe_domain *ipd, unsigned irq) +{ + struct irq_desc *desc = irq_desc + irq; + int prio = desc->ic_prio; + + desc->depth = 0; + if (ipd != &ipipe_root && + atomic_inc_return(&__ipipe_irq_lvdepth[prio]) == 1) + __set_bit(prio, &__ipipe_irq_lvmask); +} +EXPORT_SYMBOL(__ipipe_enable_irqdesc); + +void __ipipe_disable_irqdesc(struct ipipe_domain *ipd, unsigned irq) +{ + struct irq_desc *desc = irq_desc + irq; + int prio = desc->ic_prio; + + if (ipd != &ipipe_root && + atomic_dec_and_test(&__ipipe_irq_lvdepth[prio])) + __clear_bit(prio, &__ipipe_irq_lvmask); +} +EXPORT_SYMBOL(__ipipe_disable_irqdesc); + +void __ipipe_stall_root_raw(void) +{ + /* + * This code is called by the ins{bwl} routines (see + * arch/blackfin/lib/ins.S), which are heavily used by the + * network stack. It masks all interrupts but those handled by + * non-root domains, so that we keep decent network transfer + * rates for Linux without inducing pathological jitter for + * the real-time domain. + */ + __asm__ __volatile__ ("sti %0;" : : "d"(__ipipe_irq_lvmask)); + + __set_bit(IPIPE_STALL_FLAG, + &ipipe_root_cpudom_var(status)); +} + +void __ipipe_unstall_root_raw(void) +{ + __clear_bit(IPIPE_STALL_FLAG, + &ipipe_root_cpudom_var(status)); + + __asm__ __volatile__ ("sti %0;" : : "d"(bfin_irq_flags)); +} + +int __ipipe_syscall_root(struct pt_regs *regs) +{ + unsigned long flags; + + /* We need to run the IRQ tail hook whenever we don't + * propagate a syscall to higher domains, because we know that + * important operations might be pending there (e.g. Xenomai + * deferred rescheduling). */ + + if (!__ipipe_syscall_watched_p(current, regs->orig_p0)) { + void (*hook)(void) = (void (*)(void))__ipipe_irq_tail_hook; + hook(); + return 0; + } + + /* + * This routine either returns: + * 0 -- if the syscall is to be passed to Linux; + * 1 -- if the syscall should not be passed to Linux, and no + * tail work should be performed; + * -1 -- if the syscall should not be passed to Linux but the + * tail work has to be performed (for handling signals etc). + */ + + if (__ipipe_event_monitored_p(IPIPE_EVENT_SYSCALL) && + __ipipe_dispatch_event(IPIPE_EVENT_SYSCALL, regs) > 0) { + if (ipipe_root_domain_p && !in_atomic()) { + /* + * Sync pending VIRQs before _TIF_NEED_RESCHED + * is tested. + */ + local_irq_save_hw(flags); + if ((ipipe_root_cpudom_var(irqpend_himask) & IPIPE_IRQMASK_VIRT) != 0) + __ipipe_sync_pipeline(IPIPE_IRQMASK_VIRT); + local_irq_restore_hw(flags); + return -1; + } + return 1; + } + + return 0; +} + +unsigned long ipipe_critical_enter(void (*syncfn) (void)) +{ + unsigned long flags; + + local_irq_save_hw(flags); + + return flags; +} + +void ipipe_critical_exit(unsigned long flags) +{ + local_irq_restore_hw(flags); +} + +static void __ipipe_no_irqtail(void) +{ +} + +int ipipe_get_sysinfo(struct ipipe_sysinfo *info) +{ + info->ncpus = num_online_cpus(); + info->cpufreq = ipipe_cpu_freq(); + info->archdep.tmirq = IPIPE_TIMER_IRQ; + info->archdep.tmfreq = info->cpufreq; + + return 0; +} + +/* + * ipipe_trigger_irq() -- Push the interrupt at front of the pipeline + * just like if it has been actually received from a hw source. Also + * works for virtual interrupts. + */ +int ipipe_trigger_irq(unsigned irq) +{ + unsigned long flags; + + if (irq >= IPIPE_NR_IRQS || + (ipipe_virtual_irq_p(irq) + && !test_bit(irq - IPIPE_VIRQ_BASE, &__ipipe_virtual_irq_map))) + return -EINVAL; + + local_irq_save_hw(flags); + + __ipipe_handle_irq(irq, NULL); + + local_irq_restore_hw(flags); + + return 1; +} + +/* Move Linux IRQ to threads. */ + +static int do_irqd(void *__desc) +{ + struct irq_desc *desc = __desc; + unsigned irq = desc - irq_desc; + int thrprio = desc->thr_prio; + int thrmask = 1 << thrprio; + int cpu = smp_processor_id(); + cpumask_t cpumask; + + sigfillset(¤t->blocked); + current->flags |= PF_NOFREEZE; + cpumask = cpumask_of_cpu(cpu); + set_cpus_allowed(current, cpumask); + ipipe_setscheduler_root(current, SCHED_FIFO, 50 + thrprio); + + while (!kthread_should_stop()) { + local_irq_disable(); + if (!(desc->status & IRQ_SCHEDULED)) { + set_current_state(TASK_INTERRUPTIBLE); +resched: + local_irq_enable(); + schedule(); + local_irq_disable(); + } + __set_current_state(TASK_RUNNING); + /* + * If higher priority interrupt servers are ready to + * run, reschedule immediately. We need this for the + * GPIO demux IRQ handler to unmask the interrupt line + * _last_, after all GPIO IRQs have run. + */ + if (per_cpu(pending_irqthread_mask, cpu) & ~(thrmask|(thrmask-1))) + goto resched; + if (--per_cpu(pending_irq_count[thrprio], cpu) == 0) + per_cpu(pending_irqthread_mask, cpu) &= ~thrmask; + desc->status &= ~IRQ_SCHEDULED; + desc->thr_handler(irq, &__raw_get_cpu_var(__ipipe_tick_regs)); + local_irq_enable(); + } + __set_current_state(TASK_RUNNING); + return 0; +} + +static void kick_irqd(unsigned irq, void *cookie) +{ + struct irq_desc *desc = irq_desc + irq; + int thrprio = desc->thr_prio; + int thrmask = 1 << thrprio; + int cpu = smp_processor_id(); + + if (!(desc->status & IRQ_SCHEDULED)) { + desc->status |= IRQ_SCHEDULED; + per_cpu(pending_irqthread_mask, cpu) |= thrmask; + ++per_cpu(pending_irq_count[thrprio], cpu); + wake_up_process(desc->thread); + } +} + +int ipipe_start_irq_thread(unsigned irq, struct irq_desc *desc) +{ + if (desc->thread || !create_irq_threads) + return 0; + + desc->thread = kthread_create(do_irqd, desc, "IRQ %d", irq); + if (desc->thread == NULL) { + printk(KERN_ERR "irqd: could not create IRQ thread %d!\n", irq); + return -ENOMEM; + } + + wake_up_process(desc->thread); + + desc->thr_handler = ipipe_root_domain->irqs[irq].handler; + ipipe_root_domain->irqs[irq].handler = &kick_irqd; + + return 0; +} + +void __init ipipe_init_irq_threads(void) +{ + unsigned irq; + struct irq_desc *desc; + + create_irq_threads = 1; + + for (irq = 0; irq < NR_IRQS; irq++) { + desc = irq_desc + irq; + if (desc->action != NULL || + (desc->status & IRQ_NOREQUEST) != 0) + ipipe_start_irq_thread(irq, desc); + } +} + +EXPORT_SYMBOL(show_stack); + +#ifdef CONFIG_IPIPE_TRACE_MCOUNT +void notrace _mcount(void); +EXPORT_SYMBOL(_mcount); +#endif /* CONFIG_IPIPE_TRACE_MCOUNT */ diff --git a/arch/blackfin/kernel/irqchip.c b/arch/blackfin/kernel/irqchip.c index 07402f57c9de..ab8209cbbad0 100644 --- a/arch/blackfin/kernel/irqchip.c +++ b/arch/blackfin/kernel/irqchip.c @@ -36,7 +36,7 @@ #include <linux/irq.h> #include <asm/trace.h> -static unsigned long irq_err_count; +static atomic_t irq_err_count; static spinlock_t irq_controller_lock; /* @@ -48,10 +48,9 @@ void dummy_mask_unmask_irq(unsigned int irq) void ack_bad_irq(unsigned int irq) { - irq_err_count += 1; + atomic_inc(&irq_err_count); printk(KERN_ERR "IRQ: spurious interrupt %d\n", irq); } -EXPORT_SYMBOL(ack_bad_irq); static struct irq_chip bad_chip = { .ack = dummy_mask_unmask_irq, @@ -72,7 +71,7 @@ static struct irq_desc bad_irq_desc = { int show_interrupts(struct seq_file *p, void *v) { - int i = *(loff_t *) v; + int i = *(loff_t *) v, j; struct irqaction *action; unsigned long flags; @@ -80,19 +79,20 @@ int show_interrupts(struct seq_file *p, void *v) spin_lock_irqsave(&irq_desc[i].lock, flags); action = irq_desc[i].action; if (!action) - goto unlock; - - seq_printf(p, "%3d: %10u ", i, kstat_irqs(i)); + goto skip; + seq_printf(p, "%3d: ", i); + for_each_online_cpu(j) + seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]); + 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_printf(p, " %s", action->name); seq_putc(p, '\n'); - unlock: + skip: spin_unlock_irqrestore(&irq_desc[i].lock, flags); - } else if (i == NR_IRQS) { - seq_printf(p, "Err: %10lu\n", irq_err_count); - } + } else if (i == NR_IRQS) + seq_printf(p, "Err: %10u\n", atomic_read(&irq_err_count)); return 0; } @@ -101,7 +101,6 @@ int show_interrupts(struct seq_file *p, void *v) * come via this function. Instead, they should provide their * own 'handler' */ - #ifdef CONFIG_DO_IRQ_L1 __attribute__((l1_text)) #endif @@ -109,8 +108,9 @@ asmlinkage void asm_do_IRQ(unsigned int irq, struct pt_regs *regs) { struct pt_regs *old_regs; struct irq_desc *desc = irq_desc + irq; +#ifndef CONFIG_IPIPE unsigned short pending, other_ints; - +#endif old_regs = set_irq_regs(regs); /* @@ -121,9 +121,24 @@ asmlinkage void asm_do_IRQ(unsigned int irq, struct pt_regs *regs) desc = &bad_irq_desc; irq_enter(); - +#ifdef CONFIG_DEBUG_STACKOVERFLOW + /* Debugging check for stack overflow: is there less than STACK_WARN free? */ + { + long sp; + + sp = __get_SP() & (THREAD_SIZE-1); + + if (unlikely(sp < (sizeof(struct thread_info) + STACK_WARN))) { + dump_stack(); + printk(KERN_EMERG "%s: possible stack overflow while handling irq %i " + " only %ld bytes free\n", + __func__, irq, sp - sizeof(struct thread_info)); + } + } +#endif generic_handle_irq(irq); +#ifndef CONFIG_IPIPE /* Useless and bugous over the I-pipe: IRQs are threaded. */ /* If we're the only interrupt running (ignoring IRQ15 which is for syscalls), lower our priority to IRQ14 so that softirqs run at that level. If there's another, lower-level interrupt, irq_exit @@ -133,6 +148,7 @@ asmlinkage void asm_do_IRQ(unsigned int irq, struct pt_regs *regs) other_ints = pending & (pending - 1); if (other_ints == 0) lower_to_irq14(); +#endif /* !CONFIG_IPIPE */ irq_exit(); set_irq_regs(old_regs); diff --git a/arch/blackfin/kernel/kgdb.c b/arch/blackfin/kernel/kgdb.c index b795a207742c..b163f6d3330d 100644 --- a/arch/blackfin/kernel/kgdb.c +++ b/arch/blackfin/kernel/kgdb.c @@ -34,9 +34,14 @@ int gdb_bfin_vector = -1; #error change the definition of slavecpulocks #endif -#ifdef CONFIG_BFIN_WDT -# error "Please unselect blackfin watchdog driver before build KGDB." -#endif +#define IN_MEM(addr, size, l1_addr, l1_size) \ +({ \ + unsigned long __addr = (unsigned long)(addr); \ + (l1_size && __addr >= l1_addr && __addr + (size) <= l1_addr + l1_size); \ +}) +#define ASYNC_BANK_SIZE \ + (ASYNC_BANK0_SIZE + ASYNC_BANK1_SIZE + \ + ASYNC_BANK2_SIZE + ASYNC_BANK3_SIZE) void pt_regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *regs) { @@ -105,7 +110,7 @@ void pt_regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *regs) * Extracts ebp, esp and eip values understandable by gdb from the values * saved by switch_to. * thread.esp points to ebp. flags and ebp are pushed in switch_to hence esp - * prior to entering switch_to is 8 greater then the value that is saved. + * prior to entering switch_to is 8 greater than the value that is saved. * If switch_to changes, change following code appropriately. */ void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p) @@ -219,6 +224,7 @@ int bfin_set_hw_break(unsigned long addr, int len, enum kgdb_bptype type) if (bfin_type == breakinfo[breakno].type && !breakinfo[breakno].occupied) { breakinfo[breakno].occupied = 1; + breakinfo[breakno].skip = 0; breakinfo[breakno].enabled = 1; breakinfo[breakno].addr = addr; breakinfo[breakno].dataacc = dataacc; @@ -363,12 +369,12 @@ void kgdb_passive_cpu_callback(void *info) void kgdb_roundup_cpus(unsigned long flags) { - smp_call_function(kgdb_passive_cpu_callback, NULL, 0, 0); + smp_call_function(kgdb_passive_cpu_callback, NULL, 0); } void kgdb_roundup_cpu(int cpu, unsigned long flags) { - smp_call_function_single(cpu, kgdb_passive_cpu_callback, NULL, 0, 0); + smp_call_function_single(cpu, kgdb_passive_cpu_callback, NULL, 0); } #endif @@ -385,10 +391,8 @@ int kgdb_arch_handle_exception(int vector, int signo, struct pt_regs *regs) { long addr; - long breakno; char *ptr; int newPC; - int wp_status; int i; switch (remcom_in_buffer[0]) { @@ -426,17 +430,6 @@ int kgdb_arch_handle_exception(int vector, int signo, kgdb_single_step = i + 1; } - if (vector == VEC_WATCH) { - wp_status = bfin_read_WPSTAT(); - for (breakno = 0; breakno < HW_WATCHPOINT_NUM; breakno++) { - if (wp_status & (1 << breakno)) { - breakinfo->skip = 1; - break; - } - } - bfin_write_WPSTAT(0); - } - bfin_correct_hw_break(); return 0; @@ -478,57 +471,32 @@ static int validate_memory_access_address(unsigned long addr, int size) return 0; if (addr >= SYSMMR_BASE) return 0; - if (addr >= ASYNC_BANK0_BASE - && addr + size <= ASYNC_BANK3_BASE + ASYNC_BANK3_SIZE) + if (IN_MEM(addr, size, ASYNC_BANK0_BASE, ASYNC_BANK_SIZE)) return 0; if (cpu == 0) { - if (addr >= L1_SCRATCH_START - && (addr + size <= L1_SCRATCH_START + L1_SCRATCH_LENGTH)) + if (IN_MEM(addr, size, L1_SCRATCH_START, L1_SCRATCH_LENGTH)) return 0; -#if L1_CODE_LENGTH != 0 - if (addr >= L1_CODE_START - && (addr + size <= L1_CODE_START + L1_CODE_LENGTH)) + if (IN_MEM(addr, size, L1_CODE_START, L1_CODE_LENGTH)) return 0; -#endif -#if L1_DATA_A_LENGTH != 0 - if (addr >= L1_DATA_A_START - && (addr + size <= L1_DATA_A_START + L1_DATA_A_LENGTH)) + if (IN_MEM(addr, size, L1_DATA_A_START, L1_DATA_A_LENGTH)) return 0; -#endif -#if L1_DATA_B_LENGTH != 0 - if (addr >= L1_DATA_B_START - && (addr + size <= L1_DATA_B_START + L1_DATA_B_LENGTH)) + if (IN_MEM(addr, size, L1_DATA_B_START, L1_DATA_B_LENGTH)) return 0; -#endif #ifdef CONFIG_SMP } else if (cpu == 1) { - if (addr >= COREB_L1_SCRATCH_START - && (addr + size <= COREB_L1_SCRATCH_START - + L1_SCRATCH_LENGTH)) + if (IN_MEM(addr, size, COREB_L1_SCRATCH_START, L1_SCRATCH_LENGTH)) return 0; -# if L1_CODE_LENGTH != 0 - if (addr >= COREB_L1_CODE_START - && (addr + size <= COREB_L1_CODE_START + L1_CODE_LENGTH)) + if (IN_MEM(addr, size, COREB_L1_CODE_START, L1_CODE_LENGTH)) return 0; -# endif -# if L1_DATA_A_LENGTH != 0 - if (addr >= COREB_L1_DATA_A_START - && (addr + size <= COREB_L1_DATA_A_START + L1_DATA_A_LENGTH)) + if (IN_MEM(addr, size, COREB_L1_DATA_A_START, L1_DATA_A_LENGTH)) return 0; -# endif -# if L1_DATA_B_LENGTH != 0 - if (addr >= COREB_L1_DATA_B_START - && (addr + size <= COREB_L1_DATA_B_START + L1_DATA_B_LENGTH)) + if (IN_MEM(addr, size, COREB_L1_DATA_B_START, L1_DATA_B_LENGTH)) return 0; -# endif #endif } -#if L2_LENGTH != 0 - if (addr >= L2_START - && addr + size <= L2_START + L2_LENGTH) + if (IN_MEM(addr, size, L2_START, L2_LENGTH)) return 0; -#endif return EFAULT; } @@ -582,12 +550,9 @@ int kgdb_mem2hex(char *mem, char *buf, int count) default: err = EFAULT; } - } else if (cpu == 0 && (unsigned int)mem >= L1_CODE_START && - (unsigned int)(mem + count) <= L1_CODE_START + L1_CODE_LENGTH + } else if ((cpu == 0 && IN_MEM(mem, count, L1_CODE_START, L1_CODE_LENGTH)) #ifdef CONFIG_SMP - || cpu == 1 && (unsigned int)mem >= COREB_L1_CODE_START && - (unsigned int)(mem + count) <= - COREB_L1_CODE_START + L1_CODE_LENGTH + || (cpu == 1 && IN_MEM(mem, count, COREB_L1_CODE_START, L1_CODE_LENGTH)) #endif ) { /* access L1 instruction SRAM*/ @@ -658,12 +623,9 @@ int kgdb_ebin2mem(char *buf, char *mem, int count) default: return EFAULT; } - } else if (cpu == 0 && (unsigned int)mem >= L1_CODE_START && - (unsigned int)(mem + count) < L1_CODE_START + L1_CODE_LENGTH + } else if ((cpu == 0 && IN_MEM(mem, count, L1_CODE_START, L1_CODE_LENGTH)) #ifdef CONFIG_SMP - || cpu == 1 && (unsigned int)mem >= COREB_L1_CODE_START && - (unsigned int)(mem + count) <= - COREB_L1_CODE_START + L1_CODE_LENGTH + || (cpu == 1 && IN_MEM(mem, count, COREB_L1_CODE_START, L1_CODE_LENGTH)) #endif ) { /* access L1 instruction SRAM */ @@ -723,12 +685,9 @@ int kgdb_hex2mem(char *buf, char *mem, int count) default: return EFAULT; } - } else if (cpu == 0 && (unsigned int)mem >= L1_CODE_START && - (unsigned int)(mem + count) <= L1_CODE_START + L1_CODE_LENGTH + } else if ((cpu == 0 && IN_MEM(mem, count, L1_CODE_START, L1_CODE_LENGTH)) #ifdef CONFIG_SMP - || cpu == 1 && (unsigned int)mem >= COREB_L1_CODE_START && - (unsigned int)(mem + count) <= - COREB_L1_CODE_START + L1_CODE_LENGTH + || (cpu == 1 && IN_MEM(mem, count, COREB_L1_CODE_START, L1_CODE_LENGTH)) #endif ) { /* access L1 instruction SRAM */ @@ -745,24 +704,16 @@ int kgdb_validate_break_address(unsigned long addr) if (addr >= 0x1000 && (addr + BREAK_INSTR_SIZE) <= physical_mem_end) return 0; - if (addr >= ASYNC_BANK0_BASE - && addr + BREAK_INSTR_SIZE <= ASYNC_BANK3_BASE + ASYNC_BANK3_BASE) + if (IN_MEM(addr, BREAK_INSTR_SIZE, ASYNC_BANK0_BASE, ASYNC_BANK_SIZE)) return 0; -#if L1_CODE_LENGTH != 0 - if (cpu == 0 && addr >= L1_CODE_START - && addr + BREAK_INSTR_SIZE <= L1_CODE_START + L1_CODE_LENGTH) + if (cpu == 0 && IN_MEM(addr, BREAK_INSTR_SIZE, L1_CODE_START, L1_CODE_LENGTH)) return 0; -# ifdef CONFIG_SMP - else if (cpu == 1 && addr >= COREB_L1_CODE_START - && addr + BREAK_INSTR_SIZE <= COREB_L1_CODE_START + L1_CODE_LENGTH) +#ifdef CONFIG_SMP + else if (cpu == 1 && IN_MEM(addr, BREAK_INSTR_SIZE, COREB_L1_CODE_START, L1_CODE_LENGTH)) return 0; -# endif #endif -#if L2_LENGTH != 0 - if (addr >= L2_START - && addr + BREAK_INSTR_SIZE <= L2_START + L2_LENGTH) + if (IN_MEM(addr, BREAK_INSTR_SIZE, L2_START, L2_LENGTH)) return 0; -#endif return EFAULT; } @@ -772,13 +723,9 @@ int kgdb_arch_set_breakpoint(unsigned long addr, char *saved_instr) int err; int cpu = raw_smp_processor_id(); - if ((cpu == 0 && (unsigned int)addr >= L1_CODE_START - && (unsigned int)(addr + BREAK_INSTR_SIZE) - < L1_CODE_START + L1_CODE_LENGTH) + if ((cpu == 0 && IN_MEM(addr, BREAK_INSTR_SIZE, L1_CODE_START, L1_CODE_LENGTH)) #ifdef CONFIG_SMP - || (cpu == 1 && (unsigned int)addr >= COREB_L1_CODE_START - && (unsigned int)(addr + BREAK_INSTR_SIZE) - < COREB_L1_CODE_START + L1_CODE_LENGTH) + || (cpu == 1 && IN_MEM(addr, BREAK_INSTR_SIZE, COREB_L1_CODE_START, L1_CODE_LENGTH)) #endif ) { /* access L1 instruction SRAM */ @@ -804,9 +751,7 @@ int kgdb_arch_set_breakpoint(unsigned long addr, char *saved_instr) int kgdb_arch_remove_breakpoint(unsigned long addr, char *bundle) { - if ((unsigned int)addr >= L1_CODE_START && - (unsigned int)(addr + BREAK_INSTR_SIZE) < - L1_CODE_START + L1_CODE_LENGTH) { + if (IN_MEM(addr, BREAK_INSTR_SIZE, L1_CODE_START, L1_CODE_LENGTH)) { /* access L1 instruction SRAM */ if (dma_memcpy((void *)addr, bundle, BREAK_INSTR_SIZE) == NULL) return -EFAULT; diff --git a/arch/blackfin/kernel/kgdb_test.c b/arch/blackfin/kernel/kgdb_test.c new file mode 100644 index 000000000000..3dba9c17304a --- /dev/null +++ b/arch/blackfin/kernel/kgdb_test.c @@ -0,0 +1,123 @@ +/* + * arch/blackfin/kernel/kgdb_test.c - Blackfin kgdb tests + * + * Copyright 2005-2008 Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/proc_fs.h> + +#include <asm/current.h> +#include <asm/uaccess.h> +#include <asm/system.h> + +#include <asm/blackfin.h> + +static char cmdline[256]; +static unsigned long len; + +static int num1 __attribute__((l1_data)); + +void kgdb_l1_test(void) __attribute__((l1_text)); + +void kgdb_l1_test(void) +{ + printk(KERN_ALERT "L1(before change) : data variable addr = 0x%p, data value is %d\n", &num1, num1); + printk(KERN_ALERT "L1 : code function addr = 0x%p\n", kgdb_l1_test); + num1 = num1 + 10 ; + printk(KERN_ALERT "L1(after change) : data variable addr = 0x%p, data value is %d\n", &num1, num1); + return ; +} +#if L2_LENGTH + +static int num2 __attribute__((l2)); +void kgdb_l2_test(void) __attribute__((l2)); + +void kgdb_l2_test(void) +{ + printk(KERN_ALERT "L2(before change) : data variable addr = 0x%p, data value is %d\n", &num2, num2); + printk(KERN_ALERT "L2 : code function addr = 0x%p\n", kgdb_l2_test); + num2 = num2 + 20 ; + printk(KERN_ALERT "L2(after change) : data variable addr = 0x%p, data value is %d\n", &num2, num2); + return ; +} + +#endif + + +int kgdb_test(char *name, int len, int count, int z) +{ + printk(KERN_DEBUG "kgdb name(%d): %s, %d, %d\n", len, name, count, z); + count = z; + return count; +} + +static int test_proc_output(char *buf) +{ + kgdb_test("hello world!", 12, 0x55, 0x10); + kgdb_l1_test(); + #if L2_LENGTH + kgdb_l2_test(); + #endif + + return 0; +} + +static int test_read_proc(char *page, char **start, off_t off, + int count, int *eof, void *data) +{ + int len; + + len = test_proc_output(page); + if (len <= off+count) + *eof = 1; + *start = page + off; + len -= off; + if (len > count) + len = count; + if (len < 0) + len = 0; + return len; +} + +static int test_write_proc(struct file *file, const char *buffer, + unsigned long count, void *data) +{ + if (count >= 256) + len = 255; + else + len = count; + + memcpy(cmdline, buffer, count); + cmdline[len] = 0; + + return len; +} + +static int __init kgdbtest_init(void) +{ + struct proc_dir_entry *entry; + + entry = create_proc_entry("kgdbtest", 0, NULL); + if (entry == NULL) + return -ENOMEM; + + entry->read_proc = test_read_proc; + entry->write_proc = test_write_proc; + entry->data = NULL; + + return 0; +} + +static void __exit kgdbtest_exit(void) +{ + remove_proc_entry("kgdbtest", NULL); +} + +module_init(kgdbtest_init); +module_exit(kgdbtest_exit); +MODULE_LICENSE("GPL"); diff --git a/arch/blackfin/kernel/mcount.S b/arch/blackfin/kernel/mcount.S new file mode 100644 index 000000000000..edcfb3865f46 --- /dev/null +++ b/arch/blackfin/kernel/mcount.S @@ -0,0 +1,70 @@ +/* + * linux/arch/blackfin/mcount.S + * + * Copyright (C) 2006 Analog Devices Inc. + * + * 2007/04/12 Save index, length, modify and base registers. --rpm + */ + +#include <linux/linkage.h> +#include <asm/blackfin.h> + +.text + +.align 4 /* just in case */ + +ENTRY(__mcount) + [--sp] = i0; + [--sp] = i1; + [--sp] = i2; + [--sp] = i3; + [--sp] = l0; + [--sp] = l1; + [--sp] = l2; + [--sp] = l3; + [--sp] = m0; + [--sp] = m1; + [--sp] = m2; + [--sp] = m3; + [--sp] = b0; + [--sp] = b1; + [--sp] = b2; + [--sp] = b3; + [--sp] = ( r7:0, p5:0 ); + [--sp] = ASTAT; + + p1.L = _ipipe_trace_enable; + p1.H = _ipipe_trace_enable; + r7 = [p1]; + CC = r7 == 0; + if CC jump out; + link 0x10; + r0 = 0x0; + [sp + 0xc] = r0; /* v */ + r0 = 0x0; /* type: IPIPE_TRACE_FN */ + r1 = rets; + p0 = [fp]; /* p0: Prior FP */ + r2 = [p0 + 4]; /* r2: Prior RETS */ + call ___ipipe_trace; + unlink; +out: + ASTAT = [sp++]; + ( r7:0, p5:0 ) = [sp++]; + b3 = [sp++]; + b2 = [sp++]; + b1 = [sp++]; + b0 = [sp++]; + m3 = [sp++]; + m2 = [sp++]; + m1 = [sp++]; + m0 = [sp++]; + l3 = [sp++]; + l2 = [sp++]; + l1 = [sp++]; + l0 = [sp++]; + i3 = [sp++]; + i2 = [sp++]; + i1 = [sp++]; + i0 = [sp++]; + rts; +ENDPROC(__mcount) diff --git a/arch/blackfin/kernel/module.c b/arch/blackfin/kernel/module.c index e1bebc80a5bf..1bd7f2d018a8 100644 --- a/arch/blackfin/kernel/module.c +++ b/arch/blackfin/kernel/module.c @@ -37,111 +37,6 @@ #include <asm/dma.h> #include <asm/cacheflush.h> -/* - * handle arithmetic relocations. - * See binutils/bfd/elf32-bfin.c for more details - */ -#define RELOC_STACK_SIZE 100 -static uint32_t reloc_stack[RELOC_STACK_SIZE]; -static unsigned int reloc_stack_tos; - -#define is_reloc_stack_empty() ((reloc_stack_tos > 0)?0:1) - -static void reloc_stack_push(uint32_t value) -{ - reloc_stack[reloc_stack_tos++] = value; -} - -static uint32_t reloc_stack_pop(void) -{ - return reloc_stack[--reloc_stack_tos]; -} - -static uint32_t reloc_stack_operate(unsigned int oper, struct module *mod) -{ - uint32_t value; - - switch (oper) { - case R_add: - value = reloc_stack[reloc_stack_tos - 2] + - reloc_stack[reloc_stack_tos - 1]; - reloc_stack_tos -= 2; - break; - case R_sub: - value = reloc_stack[reloc_stack_tos - 2] - - reloc_stack[reloc_stack_tos - 1]; - reloc_stack_tos -= 2; - break; - case R_mult: - value = reloc_stack[reloc_stack_tos - 2] * - reloc_stack[reloc_stack_tos - 1]; - reloc_stack_tos -= 2; - break; - case R_div: - value = reloc_stack[reloc_stack_tos - 2] / - reloc_stack[reloc_stack_tos - 1]; - reloc_stack_tos -= 2; - break; - case R_mod: - value = reloc_stack[reloc_stack_tos - 2] % - reloc_stack[reloc_stack_tos - 1]; - reloc_stack_tos -= 2; - break; - case R_lshift: - value = reloc_stack[reloc_stack_tos - 2] << - reloc_stack[reloc_stack_tos - 1]; - reloc_stack_tos -= 2; - break; - case R_rshift: - value = reloc_stack[reloc_stack_tos - 2] >> - reloc_stack[reloc_stack_tos - 1]; - reloc_stack_tos -= 2; - break; - case R_and: - value = reloc_stack[reloc_stack_tos - 2] & - reloc_stack[reloc_stack_tos - 1]; - reloc_stack_tos -= 2; - break; - case R_or: - value = reloc_stack[reloc_stack_tos - 2] | - reloc_stack[reloc_stack_tos - 1]; - reloc_stack_tos -= 2; - break; - case R_xor: - value = reloc_stack[reloc_stack_tos - 2] ^ - reloc_stack[reloc_stack_tos - 1]; - reloc_stack_tos -= 2; - break; - case R_land: - value = reloc_stack[reloc_stack_tos - 2] && - reloc_stack[reloc_stack_tos - 1]; - reloc_stack_tos -= 2; - break; - case R_lor: - value = reloc_stack[reloc_stack_tos - 2] || - reloc_stack[reloc_stack_tos - 1]; - reloc_stack_tos -= 2; - break; - case R_neg: - value = -reloc_stack[reloc_stack_tos - 1]; - reloc_stack_tos--; - break; - case R_comp: - value = ~reloc_stack[reloc_stack_tos - 1]; - reloc_stack_tos -= 1; - break; - default: - printk(KERN_WARNING "module %s: unhandled reloction\n", - mod->name); - return 0; - } - - /* now push the new value back on stack */ - reloc_stack_push(value); - - return value; -} - void *module_alloc(unsigned long size) { if (size == 0) @@ -334,16 +229,18 @@ apply_relocate_add(Elf_Shdr * sechdrs, const char *strtab, undefined symbols have been resolved. */ sym = (Elf32_Sym *) sechdrs[symindex].sh_addr + ELF32_R_SYM(rel[i].r_info); - if (is_reloc_stack_empty()) { - value = sym->st_value; - } else { - value = reloc_stack_pop(); - } + value = sym->st_value; value += rel[i].r_addend; pr_debug("location is %x, value is %x type is %d \n", (unsigned int) location32, value, ELF32_R_TYPE(rel[i].r_info)); - +#ifdef CONFIG_SMP + if ((unsigned long)location16 >= COREB_L1_DATA_A_START) { + printk(KERN_ERR "module %s: cannot relocate in L1: %u (SMP kernel)", + mod->name, ELF32_R_TYPE(rel[i].r_info)); + return -ENOEXEC; + } +#endif switch (ELF32_R_TYPE(rel[i].r_info)) { case R_pcrel24: @@ -355,6 +252,12 @@ apply_relocate_add(Elf_Shdr * sechdrs, const char *strtab, location32 = (uint32_t *) location16; value -= (uint32_t) location32; value >>= 1; + if ((value & 0xFF000000) != 0 && + (value & 0xFF000000) != 0xFF000000) { + printk(KERN_ERR "module %s: relocation overflow\n", + mod->name); + return -ENOEXEC; + } pr_debug("value is %x, before %x-%x after %x-%x\n", value, *location16, *(location16 + 1), (*location16 & 0xff00) | (value >> 16 & 0x00ff), @@ -399,28 +302,6 @@ apply_relocate_add(Elf_Shdr * sechdrs, const char *strtab, pr_debug("before %x after %x\n", *location32, value); *location32 = value; break; - case R_push: - reloc_stack_push(value); - break; - case R_const: - reloc_stack_push(rel[i].r_addend); - break; - case R_add: - case R_sub: - case R_mult: - case R_div: - case R_mod: - case R_lshift: - case R_rshift: - case R_and: - case R_or: - case R_xor: - case R_land: - case R_lor: - case R_neg: - case R_comp: - reloc_stack_operate(ELF32_R_TYPE(rel[i].r_info), mod); - break; default: printk(KERN_ERR "module %s: Unknown relocation: %u\n", mod->name, ELF32_R_TYPE(rel[i].r_info)); @@ -436,6 +317,7 @@ module_finalize(const Elf_Ehdr * hdr, { unsigned int i, strindex = 0, symindex = 0; char *secstrings; + long err = 0; secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset; @@ -460,8 +342,10 @@ module_finalize(const Elf_Ehdr * hdr, (strcmp(".rela.l1.text", secstrings + sechdrs[i].sh_name) == 0) || ((strcmp(".rela.text", secstrings + sechdrs[i].sh_name) == 0) && (hdr->e_flags & (EF_BFIN_CODE_IN_L1|EF_BFIN_CODE_IN_L2))))) { - apply_relocate_add((Elf_Shdr *) sechdrs, strtab, + err = apply_relocate_add((Elf_Shdr *) sechdrs, strtab, symindex, i, mod); + if (err < 0) + return -ENOEXEC; } } return 0; diff --git a/arch/blackfin/kernel/process.c b/arch/blackfin/kernel/process.c index 0c3ea118b657..33e2e8993f7f 100644 --- a/arch/blackfin/kernel/process.c +++ b/arch/blackfin/kernel/process.c @@ -39,6 +39,7 @@ #include <asm/blackfin.h> #include <asm/fixed_code.h> +#include <asm/mem_map.h> asmlinkage void ret_from_fork(void); @@ -81,11 +82,14 @@ void cpu_idle(void)__attribute__((l1_text)); */ static void default_idle(void) { - local_irq_disable(); +#ifdef CONFIG_IPIPE + ipipe_suspend_domain(); +#endif + local_irq_disable_hw(); if (!need_resched()) idle_with_irq_disabled(); - local_irq_enable(); + local_irq_enable_hw(); } /* @@ -154,6 +158,7 @@ pid_t kernel_thread(int (*fn) (void *), void *arg, unsigned long flags) return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, ®s, 0, NULL, NULL); } +EXPORT_SYMBOL(kernel_thread); void flush_thread(void) { @@ -170,6 +175,13 @@ asmlinkage int bfin_clone(struct pt_regs *regs) unsigned long clone_flags; unsigned long newsp; +#ifdef __ARCH_SYNC_CORE_DCACHE + if (current->rt.nr_cpus_allowed == num_possible_cpus()) { + current->cpus_allowed = cpumask_of_cpu(smp_processor_id()); + current->rt.nr_cpus_allowed = 1; + } +#endif + /* syscall2 puts clone_flags in r0 and usp in r1 */ clone_flags = regs->r0; newsp = regs->r1; @@ -337,22 +349,22 @@ int _access_ok(unsigned long addr, unsigned long size) if (addr >= (unsigned long)__init_begin && addr + size <= (unsigned long)__init_end) return 1; - if (addr >= L1_SCRATCH_START - && addr + size <= L1_SCRATCH_START + L1_SCRATCH_LENGTH) + if (addr >= get_l1_scratch_start() + && addr + size <= get_l1_scratch_start() + L1_SCRATCH_LENGTH) return 1; #if L1_CODE_LENGTH != 0 - if (addr >= L1_CODE_START + (_etext_l1 - _stext_l1) - && addr + size <= L1_CODE_START + L1_CODE_LENGTH) + if (addr >= get_l1_code_start() + (_etext_l1 - _stext_l1) + && addr + size <= get_l1_code_start() + L1_CODE_LENGTH) return 1; #endif #if L1_DATA_A_LENGTH != 0 - if (addr >= L1_DATA_A_START + (_ebss_l1 - _sdata_l1) - && addr + size <= L1_DATA_A_START + L1_DATA_A_LENGTH) + if (addr >= get_l1_data_a_start() + (_ebss_l1 - _sdata_l1) + && addr + size <= get_l1_data_a_start() + L1_DATA_A_LENGTH) return 1; #endif #if L1_DATA_B_LENGTH != 0 - if (addr >= L1_DATA_B_START + (_ebss_b_l1 - _sdata_b_l1) - && addr + size <= L1_DATA_B_START + L1_DATA_B_LENGTH) + if (addr >= get_l1_data_b_start() + (_ebss_b_l1 - _sdata_b_l1) + && addr + size <= get_l1_data_b_start() + L1_DATA_B_LENGTH) return 1; #endif #if L2_LENGTH != 0 diff --git a/arch/blackfin/kernel/ptrace.c b/arch/blackfin/kernel/ptrace.c index 140bf00e9974..594e325b40e4 100644 --- a/arch/blackfin/kernel/ptrace.c +++ b/arch/blackfin/kernel/ptrace.c @@ -45,6 +45,7 @@ #include <asm/asm-offsets.h> #include <asm/dma.h> #include <asm/fixed_code.h> +#include <asm/mem_map.h> #define TEXT_OFFSET 0 /* @@ -80,10 +81,12 @@ static inline struct pt_regs *get_user_regs(struct task_struct *task) /* * Get all user integer registers. */ -static inline int ptrace_getregs(struct task_struct *tsk, void __user * uregs) +static inline int ptrace_getregs(struct task_struct *tsk, void __user *uregs) { - struct pt_regs *regs = get_user_regs(tsk); - return copy_to_user(uregs, regs, sizeof(struct pt_regs)) ? -EFAULT : 0; + struct pt_regs regs; + memcpy(®s, get_user_regs(tsk), sizeof(regs)); + regs.usp = tsk->thread.usp; + return copy_to_user(uregs, ®s, sizeof(struct pt_regs)) ? -EFAULT : 0; } /* Mapping from PT_xxx to the stack offset at which the register is @@ -157,15 +160,15 @@ put_reg(struct task_struct *task, int regno, unsigned long data) static inline int is_user_addr_valid(struct task_struct *child, unsigned long start, unsigned long len) { - struct vm_list_struct *vml; + struct vm_area_struct *vma; struct sram_list_struct *sraml; /* overflow */ if (start + len < start) return -EIO; - for (vml = child->mm->context.vmlist; vml; vml = vml->next) - if (start >= vml->vma->vm_start && start + len < vml->vma->vm_end) + vma = find_vma(child->mm, start); + if (vma && start >= vma->vm_start && start + len <= vma->vm_end) return 0; for (sraml = child->mm->context.sram_list; sraml; sraml = sraml->next) @@ -220,8 +223,8 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) break; pr_debug("ptrace: user address is valid\n"); - if (L1_CODE_LENGTH != 0 && addr >= L1_CODE_START - && addr + sizeof(tmp) <= L1_CODE_START + L1_CODE_LENGTH) { + if (L1_CODE_LENGTH != 0 && addr >= get_l1_code_start() + && addr + sizeof(tmp) <= get_l1_code_start() + L1_CODE_LENGTH) { safe_dma_memcpy (&tmp, (const void *)(addr), sizeof(tmp)); copied = sizeof(tmp); @@ -300,8 +303,8 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) break; pr_debug("ptrace: user address is valid\n"); - if (L1_CODE_LENGTH != 0 && addr >= L1_CODE_START - && addr + sizeof(data) <= L1_CODE_START + L1_CODE_LENGTH) { + if (L1_CODE_LENGTH != 0 && addr >= get_l1_code_start() + && addr + sizeof(data) <= get_l1_code_start() + L1_CODE_LENGTH) { safe_dma_memcpy ((void *)(addr), &data, sizeof(data)); copied = sizeof(data); diff --git a/arch/blackfin/kernel/reboot.c b/arch/blackfin/kernel/reboot.c index ae97ca407b0d..eeee8cb43360 100644 --- a/arch/blackfin/kernel/reboot.c +++ b/arch/blackfin/kernel/reboot.c @@ -21,7 +21,7 @@ * the core reset. */ __attribute__((l1_text)) -static void bfin_reset(void) +static void _bfin_reset(void) { /* Wait for completion of "system" events such as cache line * line fills so that we avoid infinite stalls later on as @@ -66,6 +66,18 @@ static void bfin_reset(void) } } +static void bfin_reset(void) +{ + if (ANOMALY_05000353 || ANOMALY_05000386) + _bfin_reset(); + else + /* the bootrom checks to see how it was reset and will + * automatically perform a software reset for us when + * it starts executing boot + */ + asm("raise 1;"); +} + __attribute__((weak)) void native_machine_restart(char *cmd) { @@ -75,14 +87,10 @@ void machine_restart(char *cmd) { native_machine_restart(cmd); local_irq_disable(); - if (ANOMALY_05000353 || ANOMALY_05000386) - bfin_reset(); + if (smp_processor_id()) + smp_call_function((void *)bfin_reset, 0, 1); else - /* the bootrom checks to see how it was reset and will - * automatically perform a software reset for us when - * it starts executing boot - */ - asm("raise 1;"); + bfin_reset(); } __attribute__((weak)) diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c index 71a9a8c53cea..b2a811347b65 100644 --- a/arch/blackfin/kernel/setup.c +++ b/arch/blackfin/kernel/setup.c @@ -13,6 +13,7 @@ #include <linux/bootmem.h> #include <linux/seq_file.h> #include <linux/cpu.h> +#include <linux/mm.h> #include <linux/module.h> #include <linux/tty.h> #include <linux/pfn.h> @@ -26,11 +27,10 @@ #include <asm/blackfin.h> #include <asm/cplbinit.h> #include <asm/div64.h> +#include <asm/cpu.h> #include <asm/fixed_code.h> #include <asm/early_printk.h> -static DEFINE_PER_CPU(struct cpu, cpu_devices); - u16 _bfin_swrst; EXPORT_SYMBOL(_bfin_swrst); @@ -79,27 +79,68 @@ static struct change_member *change_point[2*BFIN_MEMMAP_MAX] __initdata; static struct bfin_memmap_entry *overlap_list[BFIN_MEMMAP_MAX] __initdata; static struct bfin_memmap_entry new_map[BFIN_MEMMAP_MAX] __initdata; -void __init bfin_cache_init(void) -{ +DEFINE_PER_CPU(struct blackfin_cpudata, cpu_data); + +static int early_init_clkin_hz(char *buf); + #if defined(CONFIG_BFIN_DCACHE) || defined(CONFIG_BFIN_ICACHE) - generate_cplb_tables(); +void __init generate_cplb_tables(void) +{ + unsigned int cpu; + + generate_cplb_tables_all(); + /* Generate per-CPU I&D CPLB tables */ + for (cpu = 0; cpu < num_possible_cpus(); ++cpu) + generate_cplb_tables_cpu(cpu); +} #endif +void __cpuinit bfin_setup_caches(unsigned int cpu) +{ #ifdef CONFIG_BFIN_ICACHE - bfin_icache_init(); - printk(KERN_INFO "Instruction Cache Enabled\n"); + bfin_icache_init(icplb_tbl[cpu]); #endif #ifdef CONFIG_BFIN_DCACHE - bfin_dcache_init(); - printk(KERN_INFO "Data Cache Enabled" + bfin_dcache_init(dcplb_tbl[cpu]); +#endif + + /* + * In cache coherence emulation mode, we need to have the + * D-cache enabled before running any atomic operation which + * might invove cache invalidation (i.e. spinlock, rwlock). + * So printk's are deferred until then. + */ +#ifdef CONFIG_BFIN_ICACHE + printk(KERN_INFO "Instruction Cache Enabled for CPU%u\n", cpu); +#endif +#ifdef CONFIG_BFIN_DCACHE + printk(KERN_INFO "Data Cache Enabled for CPU%u" # if defined CONFIG_BFIN_WB " (write-back)" # elif defined CONFIG_BFIN_WT " (write-through)" # endif - "\n"); + "\n", cpu); +#endif +} + +void __cpuinit bfin_setup_cpudata(unsigned int cpu) +{ + struct blackfin_cpudata *cpudata = &per_cpu(cpu_data, cpu); + + cpudata->idle = current; + cpudata->loops_per_jiffy = loops_per_jiffy; + cpudata->imemctl = bfin_read_IMEM_CONTROL(); + cpudata->dmemctl = bfin_read_DMEM_CONTROL(); +} + +void __init bfin_cache_init(void) +{ +#if defined(CONFIG_BFIN_DCACHE) || defined(CONFIG_BFIN_ICACHE) + generate_cplb_tables(); #endif + bfin_setup_caches(0); } void __init bfin_relocate_l1_mem(void) @@ -109,6 +150,8 @@ void __init bfin_relocate_l1_mem(void) unsigned long l1_data_b_length; unsigned long l2_length; + blackfin_dma_early_init(); + l1_code_length = _etext_l1 - _stext_l1; if (l1_code_length > L1_CODE_LENGTH) panic("L1 Instruction SRAM Overflow\n"); @@ -230,7 +273,7 @@ static int __init sanitize_memmap(struct bfin_memmap_entry *map, int *pnr_map) /* record all known change-points (starting and ending addresses), omitting those that are for empty memory regions */ chgidx = 0; - for (i = 0; i < old_nr; i++) { + for (i = 0; i < old_nr; i++) { if (map[i].size != 0) { change_point[chgidx]->addr = map[i].addr; change_point[chgidx++]->pentry = &map[i]; @@ -238,13 +281,13 @@ static int __init sanitize_memmap(struct bfin_memmap_entry *map, int *pnr_map) change_point[chgidx++]->pentry = &map[i]; } } - chg_nr = chgidx; /* true number of change-points */ + chg_nr = chgidx; /* true number of change-points */ /* sort change-point list by memory addresses (low -> high) */ still_changing = 1; - while (still_changing) { + while (still_changing) { still_changing = 0; - for (i = 1; i < chg_nr; i++) { + for (i = 1; i < chg_nr; i++) { /* if <current_addr> > <last_addr>, swap */ /* or, if current=<start_addr> & last=<end_addr>, swap */ if ((change_point[i]->addr < change_point[i-1]->addr) || @@ -261,10 +304,10 @@ static int __init sanitize_memmap(struct bfin_memmap_entry *map, int *pnr_map) } /* create a new memmap, removing overlaps */ - overlap_entries = 0; /* number of entries in the overlap table */ - new_entry = 0; /* index for creating new memmap entries */ - last_type = 0; /* start with undefined memory type */ - last_addr = 0; /* start with 0 as last starting address */ + overlap_entries = 0; /* number of entries in the overlap table */ + new_entry = 0; /* index for creating new memmap entries */ + last_type = 0; /* start with undefined memory type */ + last_addr = 0; /* start with 0 as last starting address */ /* loop through change-points, determining affect on the new memmap */ for (chgidx = 0; chgidx < chg_nr; chgidx++) { /* keep track of all overlapping memmap entries */ @@ -286,14 +329,14 @@ static int __init sanitize_memmap(struct bfin_memmap_entry *map, int *pnr_map) if (overlap_list[i]->type > current_type) current_type = overlap_list[i]->type; /* continue building up new memmap based on this information */ - if (current_type != last_type) { + if (current_type != last_type) { if (last_type != 0) { new_map[new_entry].size = change_point[chgidx]->addr - last_addr; /* move forward only if the new size was non-zero */ if (new_map[new_entry].size != 0) if (++new_entry >= BFIN_MEMMAP_MAX) - break; /* no more space left for new entries */ + break; /* no more space left for new entries */ } if (current_type != 0) { new_map[new_entry].addr = change_point[chgidx]->addr; @@ -303,9 +346,9 @@ static int __init sanitize_memmap(struct bfin_memmap_entry *map, int *pnr_map) last_type = current_type; } } - new_nr = new_entry; /* retain count for new entries */ + new_nr = new_entry; /* retain count for new entries */ - /* copy new mapping into original location */ + /* copy new mapping into original location */ memcpy(map, new_map, new_nr*sizeof(struct bfin_memmap_entry)); *pnr_map = new_nr; @@ -361,7 +404,6 @@ static __init int parse_memmap(char *arg) * - "memmap=XXX[KkmM][@][$]XXX[KkmM]" defines a memory region * @ from <start> to <start>+<mem>, type RAM * $ from <start> to <start>+<mem>, type RESERVED - * */ static __init void parse_cmdline_early(char *cmdline_p) { @@ -383,14 +425,15 @@ static __init void parse_cmdline_early(char *cmdline_p) if (*to != ' ') { if (*to == '$' || *(to + 1) == '$') - reserved_mem_dcache_on = - 1; + reserved_mem_dcache_on = 1; if (*to == '#' || *(to + 1) == '#') - reserved_mem_icache_on = - 1; + reserved_mem_icache_on = 1; } } + } else if (!memcmp(to, "clkin_hz=", 9)) { + to += 9; + early_init_clkin_hz(to); } else if (!memcmp(to, "earlyprintk=", 12)) { to += 12; setup_early_printk(to); @@ -417,9 +460,8 @@ static __init void parse_cmdline_early(char *cmdline_p) * [_ramend - DMA_UNCACHED_REGION, * _ramend]: uncached DMA region * [_ramend, physical_mem_end]: memory not managed by kernel - * */ -static __init void memory_setup(void) +static __init void memory_setup(void) { #ifdef CONFIG_MTD_UCLINUX unsigned long mtd_phys = 0; @@ -436,7 +478,7 @@ static __init void memory_setup(void) memory_end = _ramend - DMA_UNCACHED_REGION; #ifdef CONFIG_MPU - /* Round up to multiple of 4MB. */ + /* Round up to multiple of 4MB */ memory_start = (_ramstart + 0x3fffff) & ~0x3fffff; #else memory_start = PAGE_ALIGN(_ramstart); @@ -616,7 +658,7 @@ static __init void setup_bootmem_allocator(void) end_pfn = memory_end >> PAGE_SHIFT; /* - * give all the memory to the bootmap allocator, tell it to put the + * give all the memory to the bootmap allocator, tell it to put the * boot mem_map at the start of memory. */ bootmap_size = init_bootmem_node(NODE_DATA(0), @@ -791,7 +833,11 @@ void __init setup_arch(char **cmdline_p) bfin_write_SWRST(_bfin_swrst | DOUBLE_FAULT); #endif +#ifdef CONFIG_SMP + if (_bfin_swrst & SWRST_DBL_FAULT_A) { +#else if (_bfin_swrst & RESET_DOUBLE) { +#endif printk(KERN_EMERG "Recovering from DOUBLE FAULT event\n"); #ifdef CONFIG_DEBUG_DOUBLEFAULT /* We assume the crashing kernel, and the current symbol table match */ @@ -823,9 +869,12 @@ void __init setup_arch(char **cmdline_p) if (bfin_compiled_revid() == -1) printk(KERN_ERR "Warning: Compiled for Rev none, but running on Rev %d\n", bfin_revid()); - else if (bfin_compiled_revid() != 0xffff) + else if (bfin_compiled_revid() != 0xffff) { printk(KERN_ERR "Warning: Compiled for Rev %d, but running on Rev %d\n", bfin_compiled_revid(), bfin_revid()); + if (bfin_compiled_revid() > bfin_revid()) + panic("Error: you are missing anomaly workarounds for this rev\n"); + } } if (bfin_revid() < CONFIG_BF_REV_MIN || bfin_revid() > CONFIG_BF_REV_MAX) printk(KERN_ERR "Warning: Unsupported Chip Revision ADSP-%s Rev 0.%d detected\n", @@ -835,7 +884,7 @@ void __init setup_arch(char **cmdline_p) printk(KERN_INFO "Blackfin Linux support by http://blackfin.uclinux.org/\n"); printk(KERN_INFO "Processor Speed: %lu MHz core clock and %lu MHz System Clock\n", - cclk / 1000000, sclk / 1000000); + cclk / 1000000, sclk / 1000000); if (ANOMALY_05000273 && (cclk >> 1) <= sclk) printk("\n\n\nANOMALY_05000273: CCLK must be >= 2*SCLK !!!\n\n\n"); @@ -867,18 +916,21 @@ void __init setup_arch(char **cmdline_p) BUG_ON((char *)&safe_user_instruction - (char *)&fixed_code_start != SAFE_USER_INSTRUCTION - FIXED_CODE_START); +#ifdef CONFIG_SMP + platform_init_cpus(); +#endif init_exception_vectors(); - bfin_cache_init(); + bfin_cache_init(); /* Initialize caches for the boot CPU */ } static int __init topology_init(void) { - int cpu; + unsigned int cpu; + /* Record CPU-private information for the boot processor. */ + bfin_setup_cpudata(0); for_each_possible_cpu(cpu) { - struct cpu *c = &per_cpu(cpu_devices, cpu); - - register_cpu(c, cpu); + register_cpu(&per_cpu(cpu_data, cpu).cpu, cpu); } return 0; @@ -886,36 +938,54 @@ static int __init topology_init(void) subsys_initcall(topology_init); +/* Get the input clock frequency */ +static u_long cached_clkin_hz = CONFIG_CLKIN_HZ; +static u_long get_clkin_hz(void) +{ + return cached_clkin_hz; +} +static int __init early_init_clkin_hz(char *buf) +{ + cached_clkin_hz = simple_strtoul(buf, NULL, 0); +#ifdef BFIN_KERNEL_CLOCK + if (cached_clkin_hz != CONFIG_CLKIN_HZ) + panic("cannot change clkin_hz when reprogramming clocks"); +#endif + return 1; +} +early_param("clkin_hz=", early_init_clkin_hz); + /* Get the voltage input multiplier */ -static u_long cached_vco_pll_ctl, cached_vco; static u_long get_vco(void) { - u_long msel; + static u_long cached_vco; + u_long msel, pll_ctl; - u_long pll_ctl = bfin_read_PLL_CTL(); - if (pll_ctl == cached_vco_pll_ctl) + /* The assumption here is that VCO never changes at runtime. + * If, someday, we support that, then we'll have to change this. + */ + if (cached_vco) return cached_vco; - else - cached_vco_pll_ctl = pll_ctl; + pll_ctl = bfin_read_PLL_CTL(); msel = (pll_ctl >> 9) & 0x3F; if (0 == msel) msel = 64; - cached_vco = CONFIG_CLKIN_HZ; + cached_vco = get_clkin_hz(); cached_vco >>= (1 & pll_ctl); /* DF bit */ cached_vco *= msel; return cached_vco; } /* Get the Core clock */ -static u_long cached_cclk_pll_div, cached_cclk; u_long get_cclk(void) { + static u_long cached_cclk_pll_div, cached_cclk; u_long csel, ssel; if (bfin_read_PLL_STAT() & 0x1) - return CONFIG_CLKIN_HZ; + return get_clkin_hz(); ssel = bfin_read_PLL_DIV(); if (ssel == cached_cclk_pll_div) @@ -934,21 +1004,21 @@ u_long get_cclk(void) EXPORT_SYMBOL(get_cclk); /* Get the System clock */ -static u_long cached_sclk_pll_div, cached_sclk; u_long get_sclk(void) { + static u_long cached_sclk; u_long ssel; - if (bfin_read_PLL_STAT() & 0x1) - return CONFIG_CLKIN_HZ; - - ssel = bfin_read_PLL_DIV(); - if (ssel == cached_sclk_pll_div) + /* The assumption here is that SCLK never changes at runtime. + * If, someday, we support that, then we'll have to change this. + */ + if (cached_sclk) return cached_sclk; - else - cached_sclk_pll_div = ssel; - ssel &= 0xf; + if (bfin_read_PLL_STAT() & 0x1) + return get_clkin_hz(); + + ssel = bfin_read_PLL_DIV() & 0xf; if (0 == ssel) { printk(KERN_WARNING "Invalid System Clock\n"); ssel = 1; @@ -982,17 +1052,18 @@ static int show_cpuinfo(struct seq_file *m, void *v) { char *cpu, *mmu, *fpu, *vendor, *cache; uint32_t revid; - - u_long cclk = 0, sclk = 0; + int cpu_num = *(unsigned int *)v; + u_long sclk, cclk; u_int icache_size = BFIN_ICACHESIZE / 1024, dcache_size = 0, dsup_banks = 0; + struct blackfin_cpudata *cpudata = &per_cpu(cpu_data, cpu_num); cpu = CPU; mmu = "none"; fpu = "none"; revid = bfin_revid(); - cclk = get_cclk(); sclk = get_sclk(); + cclk = get_cclk(); switch (bfin_read_CHIPID() & CHIPID_MANUFACTURE) { case 0xca: @@ -1003,10 +1074,7 @@ static int show_cpuinfo(struct seq_file *m, void *v) break; } - seq_printf(m, "processor\t: %d\n" - "vendor_id\t: %s\n", - *(unsigned int *)v, - vendor); + seq_printf(m, "processor\t: %d\n" "vendor_id\t: %s\n", cpu_num, vendor); if (CPUID == bfin_cpuid()) seq_printf(m, "cpu family\t: 0x%04x\n", CPUID); @@ -1029,12 +1097,12 @@ static int show_cpuinfo(struct seq_file *m, void *v) sclk/1000000, sclk%1000000); seq_printf(m, "bogomips\t: %lu.%02lu\n" "Calibration\t: %lu loops\n", - (loops_per_jiffy * HZ) / 500000, - ((loops_per_jiffy * HZ) / 5000) % 100, - (loops_per_jiffy * HZ)); + (cpudata->loops_per_jiffy * HZ) / 500000, + ((cpudata->loops_per_jiffy * HZ) / 5000) % 100, + (cpudata->loops_per_jiffy * HZ)); /* Check Cache configutation */ - switch (bfin_read_DMEM_CONTROL() & (1 << DMC0_P | 1 << DMC1_P)) { + switch (cpudata->dmemctl & (1 << DMC0_P | 1 << DMC1_P)) { case ACACHE_BSRAM: cache = "dbank-A/B\t: cache/sram"; dcache_size = 16; @@ -1058,10 +1126,10 @@ static int show_cpuinfo(struct seq_file *m, void *v) } /* Is it turned on? */ - if ((bfin_read_DMEM_CONTROL() & (ENDCPLB | DMC_ENABLE)) != (ENDCPLB | DMC_ENABLE)) + if ((cpudata->dmemctl & (ENDCPLB | DMC_ENABLE)) != (ENDCPLB | DMC_ENABLE)) dcache_size = 0; - if ((bfin_read_IMEM_CONTROL() & (IMC | ENICPLB)) != (IMC | ENICPLB)) + if ((cpudata->imemctl & (IMC | ENICPLB)) != (IMC | ENICPLB)) icache_size = 0; seq_printf(m, "cache size\t: %d KB(L1 icache) " @@ -1086,8 +1154,11 @@ static int show_cpuinfo(struct seq_file *m, void *v) "dcache setup\t: %d Super-banks/%d Sub-banks/%d Ways, %d Lines/Way\n", dsup_banks, BFIN_DSUBBANKS, BFIN_DWAYS, BFIN_DLINES); +#ifdef __ARCH_SYNC_CORE_DCACHE + seq_printf(m, "SMP Dcache Flushes\t: %lu\n\n", cpudata->dcache_invld_count); +#endif #ifdef CONFIG_BFIN_ICACHE_LOCK - switch ((bfin_read_IMEM_CONTROL() >> 3) & WAYALL_L) { + switch ((cpudata->imemctl >> 3) & WAYALL_L) { case WAY0_L: seq_printf(m, "Way0 Locked-Down\n"); break; @@ -1137,6 +1208,12 @@ static int show_cpuinfo(struct seq_file *m, void *v) seq_printf(m, "No Ways are locked\n"); } #endif + + if (cpu_num != num_possible_cpus() - 1) + return 0; + + if (L2_LENGTH) + seq_printf(m, "L2 SRAM\t\t: %dKB\n", L2_LENGTH/0x400); seq_printf(m, "board name\t: %s\n", bfin_board_name); seq_printf(m, "board memory\t: %ld kB (0x%p -> 0x%p)\n", physical_mem_end >> 10, (void *)0, (void *)physical_mem_end); @@ -1144,6 +1221,7 @@ static int show_cpuinfo(struct seq_file *m, void *v) ((int)memory_end - (int)_stext) >> 10, _stext, (void *)memory_end); + seq_printf(m, "\n"); return 0; } diff --git a/arch/blackfin/kernel/time.c b/arch/blackfin/kernel/time.c index eb2352320454..172b4c588467 100644 --- a/arch/blackfin/kernel/time.c +++ b/arch/blackfin/kernel/time.c @@ -1,32 +1,11 @@ /* - * File: arch/blackfin/kernel/time.c - * Based on: none - original work - * Author: + * arch/blackfin/kernel/time.c * - * Created: - * Description: This file contains the bfin-specific time handling details. - * Most of the stuff is located in the machine specific files. - * FIXME: (This file is subject for removal) + * This file contains the Blackfin-specific time handling details. + * Most of the stuff is located in the machine specific files. * - * Modified: - * Copyright 2004-2008 Analog Devices Inc. - * - * Bugs: Enter bugs at http://blackfin.uclinux.org/ - * - * 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. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see the file COPYING, or write - * to the Free Software Foundation, Inc., - * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * Copyright 2004-2008 Analog Devices Inc. + * Licensed under the GPL-2 or later. */ #include <linux/module.h> @@ -34,23 +13,43 @@ #include <linux/interrupt.h> #include <linux/time.h> #include <linux/irq.h> +#include <linux/delay.h> #include <asm/blackfin.h> #include <asm/time.h> +#include <asm/gptimers.h> /* This is an NTP setting */ #define TICK_SIZE (tick_nsec / 1000) -static void time_sched_init(irq_handler_t timer_routine); -static unsigned long gettimeoffset(void); - static struct irqaction bfin_timer_irq = { - .name = "BFIN Timer Tick", + .name = "Blackfin Timer Tick", +#ifdef CONFIG_IRQ_PER_CPU + .flags = IRQF_DISABLED | IRQF_PERCPU, +#else .flags = IRQF_DISABLED +#endif }; -static void -time_sched_init(irq_handler_t timer_routine) +#if defined(CONFIG_TICK_SOURCE_SYSTMR0) || defined(CONFIG_IPIPE) +void __init setup_system_timer0(void) +{ + /* Power down the core timer, just to play safe. */ + bfin_write_TCNTL(0); + + disable_gptimers(TIMER0bit); + set_gptimer_status(0, TIMER_STATUS_TRUN0); + while (get_gptimer_status(0) & TIMER_STATUS_TRUN0) + udelay(10); + + set_gptimer_config(0, 0x59); /* IRQ enable, periodic, PWM_OUT, SCLKed, OUT PAD disabled */ + set_gptimer_period(TIMER0_id, get_sclk() / HZ); + set_gptimer_pwidth(TIMER0_id, 1); + SSYNC(); + enable_gptimers(TIMER0bit); +} +#else +void __init setup_core_timer(void) { u32 tcount; @@ -58,10 +57,8 @@ time_sched_init(irq_handler_t timer_routine) bfin_write_TCNTL(1); CSYNC(); - /* - * the TSCALE prescaler counter. - */ - bfin_write_TSCALE((TIME_SCALE - 1)); + /* the TSCALE prescaler counter */ + bfin_write_TSCALE(TIME_SCALE - 1); tcount = ((get_cclk() / (HZ * TIME_SCALE)) - 1); bfin_write_TPERIOD(tcount); @@ -71,35 +68,52 @@ time_sched_init(irq_handler_t timer_routine) CSYNC(); bfin_write_TCNTL(7); +} +#endif - bfin_timer_irq.handler = (irq_handler_t)timer_routine; - /* call setup_irq instead of request_irq because request_irq calls - * kmalloc which has not been initialized yet - */ +static void __init +time_sched_init(irqreturn_t(*timer_routine) (int, void *)) +{ +#if defined(CONFIG_TICK_SOURCE_SYSTMR0) || defined(CONFIG_IPIPE) + setup_system_timer0(); + bfin_timer_irq.handler = timer_routine; + setup_irq(IRQ_TIMER0, &bfin_timer_irq); +#else + setup_core_timer(); + bfin_timer_irq.handler = timer_routine; setup_irq(IRQ_CORETMR, &bfin_timer_irq); +#endif } /* * Should return useconds since last timer tick */ +#ifndef CONFIG_GENERIC_TIME static unsigned long gettimeoffset(void) { unsigned long offset; unsigned long clocks_per_jiffy; +#if defined(CONFIG_TICK_SOURCE_SYSTMR0) || defined(CONFIG_IPIPE) + clocks_per_jiffy = bfin_read_TIMER0_PERIOD(); + offset = bfin_read_TIMER0_COUNTER() / \ + (((clocks_per_jiffy + 1) * HZ) / USEC_PER_SEC); + + if ((get_gptimer_status(0) & TIMER_STATUS_TIMIL0) && offset < (100000 / HZ / 2)) + offset += (USEC_PER_SEC / HZ); +#else clocks_per_jiffy = bfin_read_TPERIOD(); - offset = - (clocks_per_jiffy - - bfin_read_TCOUNT()) / (((clocks_per_jiffy + 1) * HZ) / - USEC_PER_SEC); + offset = (clocks_per_jiffy - bfin_read_TCOUNT()) / \ + (((clocks_per_jiffy + 1) * HZ) / USEC_PER_SEC); /* Check if we just wrapped the counters and maybe missed a tick */ if ((bfin_read_ILAT() & (1 << IRQ_CORETMR)) - && (offset < (100000 / HZ / 2))) + && (offset < (100000 / HZ / 2))) offset += (USEC_PER_SEC / HZ); - +#endif return offset; } +#endif static inline int set_rtc_mmss(unsigned long nowtime) { @@ -111,43 +125,49 @@ static inline int set_rtc_mmss(unsigned long nowtime) * as well as call the "do_timer()" routine every clocktick */ #ifdef CONFIG_CORE_TIMER_IRQ_L1 -irqreturn_t timer_interrupt(int irq, void *dummy)__attribute__((l1_text)); +__attribute__((l1_text)) #endif - irqreturn_t timer_interrupt(int irq, void *dummy) { /* last time the cmos clock got updated */ static long last_rtc_update; write_seqlock(&xtime_lock); - - do_timer(1); - - profile_tick(CPU_PROFILING); - - /* - * If we have an externally synchronized Linux clock, then update - * CMOS clock accordingly every ~11 minutes. Set_rtc_mmss() has to be - * called as close as possible to 500 ms before the new second starts. - */ - - if (ntp_synced() && - xtime.tv_sec > last_rtc_update + 660 && - (xtime.tv_nsec / NSEC_PER_USEC) >= - 500000 - ((unsigned)TICK_SIZE) / 2 - && (xtime.tv_nsec / NSEC_PER_USEC) <= - 500000 + ((unsigned)TICK_SIZE) / 2) { - if (set_rtc_mmss(xtime.tv_sec) == 0) - last_rtc_update = xtime.tv_sec; - else - /* Do it again in 60s. */ - last_rtc_update = xtime.tv_sec - 600; +#if defined(CONFIG_TICK_SOURCE_SYSTMR0) && !defined(CONFIG_IPIPE) +/* FIXME: Here TIMIL0 is not set when IPIPE enabled, why? */ + if (get_gptimer_status(0) & TIMER_STATUS_TIMIL0) { +#endif + do_timer(1); + + /* + * If we have an externally synchronized Linux clock, then update + * CMOS clock accordingly every ~11 minutes. Set_rtc_mmss() has to be + * called as close as possible to 500 ms before the new second starts. + */ + if (ntp_synced() && + xtime.tv_sec > last_rtc_update + 660 && + (xtime.tv_nsec / NSEC_PER_USEC) >= + 500000 - ((unsigned)TICK_SIZE) / 2 + && (xtime.tv_nsec / NSEC_PER_USEC) <= + 500000 + ((unsigned)TICK_SIZE) / 2) { + if (set_rtc_mmss(xtime.tv_sec) == 0) + last_rtc_update = xtime.tv_sec; + else + /* Do it again in 60s. */ + last_rtc_update = xtime.tv_sec - 600; + } +#if defined(CONFIG_TICK_SOURCE_SYSTMR0) && !defined(CONFIG_IPIPE) + set_gptimer_status(0, TIMER_STATUS_TIMIL0); } +#endif write_sequnlock(&xtime_lock); -#ifndef CONFIG_SMP +#ifdef CONFIG_IPIPE + update_root_process_times(get_irq_regs()); +#else update_process_times(user_mode(get_irq_regs())); #endif + profile_tick(CPU_PROFILING); return IRQ_HANDLED; } diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c index bef025b07443..5b0667da8d05 100644 --- a/arch/blackfin/kernel/traps.c +++ b/arch/blackfin/kernel/traps.c @@ -32,6 +32,7 @@ #include <linux/module.h> #include <linux/kallsyms.h> #include <linux/fs.h> +#include <linux/rbtree.h> #include <asm/traps.h> #include <asm/cacheflush.h> #include <asm/cplb.h> @@ -75,16 +76,6 @@ void __init trap_init(void) CSYNC(); } -/* - * Used to save the RETX, SEQSTAT, I/D CPLB FAULT ADDR - * values across the transition from exception to IRQ5. - * We put these in L1, so they are going to be in a valid - * location during exception context - */ -__attribute__((l1_data)) -unsigned long saved_retx, saved_seqstat, - saved_icplb_fault_addr, saved_dcplb_fault_addr; - static void decode_address(char *buf, unsigned long address) { #ifdef CONFIG_DEBUG_VERBOSE @@ -93,6 +84,7 @@ static void decode_address(char *buf, unsigned long address) struct mm_struct *mm; unsigned long flags, offset; unsigned char in_atomic = (bfin_read_IPEND() & 0x10) || in_atomic(); + struct rb_node *n; #ifdef CONFIG_KALLSYMS unsigned long symsize; @@ -138,9 +130,10 @@ static void decode_address(char *buf, unsigned long address) if (!mm) continue; - vml = mm->context.vmlist; - while (vml) { - struct vm_area_struct *vma = vml->vma; + for (n = rb_first(&mm->mm_rb); n; n = rb_next(n)) { + struct vm_area_struct *vma; + + vma = rb_entry(n, struct vm_area_struct, vm_rb); if (address >= vma->vm_start && address < vma->vm_end) { char _tmpbuf[256]; @@ -186,8 +179,6 @@ static void decode_address(char *buf, unsigned long address) goto done; } - - vml = vml->next; } if (!in_atomic) mmput(mm); @@ -211,18 +202,18 @@ asmlinkage void double_fault_c(struct pt_regs *fp) printk(KERN_EMERG "\n" KERN_EMERG "Double Fault\n"); #ifdef CONFIG_DEBUG_DOUBLEFAULT_PRINT if (((long)fp->seqstat & SEQSTAT_EXCAUSE) == VEC_UNCOV) { + unsigned int cpu = smp_processor_id(); char buf[150]; - decode_address(buf, saved_retx); + decode_address(buf, cpu_pda[cpu].retx); printk(KERN_EMERG "While handling exception (EXCAUSE = 0x%x) at %s:\n", - (int)saved_seqstat & SEQSTAT_EXCAUSE, buf); - decode_address(buf, saved_dcplb_fault_addr); + (unsigned int)cpu_pda[cpu].seqstat & SEQSTAT_EXCAUSE, buf); + decode_address(buf, cpu_pda[cpu].dcplb_fault_addr); printk(KERN_NOTICE " DCPLB_FAULT_ADDR: %s\n", buf); - decode_address(buf, saved_icplb_fault_addr); + decode_address(buf, cpu_pda[cpu].icplb_fault_addr); printk(KERN_NOTICE " ICPLB_FAULT_ADDR: %s\n", buf); decode_address(buf, fp->retx); - printk(KERN_NOTICE "The instruction at %s caused a double exception\n", - buf); + printk(KERN_NOTICE "The instruction at %s caused a double exception\n", buf); } else #endif { @@ -240,6 +231,9 @@ asmlinkage void trap_c(struct pt_regs *fp) #ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON int j; #endif +#ifdef CONFIG_DEBUG_HUNT_FOR_ZERO + unsigned int cpu = smp_processor_id(); +#endif int sig = 0; siginfo_t info; unsigned long trapnr = fp->seqstat & SEQSTAT_EXCAUSE; @@ -417,7 +411,7 @@ asmlinkage void trap_c(struct pt_regs *fp) info.si_code = ILL_CPLB_MULHIT; sig = SIGSEGV; #ifdef CONFIG_DEBUG_HUNT_FOR_ZERO - if (saved_dcplb_fault_addr < FIXED_CODE_START) + if (cpu_pda[cpu].dcplb_fault_addr < FIXED_CODE_START) verbose_printk(KERN_NOTICE "NULL pointer access\n"); else #endif @@ -471,7 +465,7 @@ asmlinkage void trap_c(struct pt_regs *fp) info.si_code = ILL_CPLB_MULHIT; sig = SIGSEGV; #ifdef CONFIG_DEBUG_HUNT_FOR_ZERO - if (saved_icplb_fault_addr < FIXED_CODE_START) + if (cpu_pda[cpu].icplb_fault_addr < FIXED_CODE_START) verbose_printk(KERN_NOTICE "Jump to NULL address\n"); else #endif @@ -584,10 +578,15 @@ asmlinkage void trap_c(struct pt_regs *fp) } } - info.si_signo = sig; - info.si_errno = 0; - info.si_addr = (void __user *)fp->pc; - force_sig_info(sig, &info, current); +#ifdef CONFIG_IPIPE + if (!ipipe_trap_notify(fp->seqstat & 0x3f, fp)) +#endif + { + info.si_signo = sig; + info.si_errno = 0; + info.si_addr = (void __user *)fp->pc; + force_sig_info(sig, &info, current); + } trace_buffer_restore(j); return; @@ -656,13 +655,13 @@ static bool get_instruction(unsigned short *val, unsigned short *address) return false; } -/* +/* * decode the instruction if we are printing out the trace, as it * makes things easier to follow, without running it through objdump * These are the normal instructions which cause change of flow, which * would be at the source of the trace buffer */ -#ifdef CONFIG_DEBUG_VERBOSE +#if defined(CONFIG_DEBUG_VERBOSE) && defined(CONFIG_DEBUG_BFIN_HWTRACE_ON) static void decode_instruction(unsigned short *address) { unsigned short opcode; @@ -846,7 +845,7 @@ void show_stack(struct task_struct *task, unsigned long *stack) } if (fp) { frame = fp; - printk(" FP: (0x%p)\n", fp); + printk(KERN_NOTICE " FP: (0x%p)\n", fp); } else frame = 0; @@ -960,6 +959,7 @@ void dump_bfin_process(struct pt_regs *fp) else verbose_printk(KERN_NOTICE "COMM= invalid\n"); + printk(KERN_NOTICE "CPU = %d\n", current_thread_info()->cpu); if (!((unsigned long)current->mm & 0x3) && (unsigned long)current->mm >= FIXED_CODE_START) verbose_printk(KERN_NOTICE "TEXT = 0x%p-0x%p DATA = 0x%p-0x%p\n" KERN_NOTICE " BSS = 0x%p-0x%p USER-STACK = 0x%p\n" @@ -1053,6 +1053,7 @@ void show_regs(struct pt_regs *fp) struct irqaction *action; unsigned int i; unsigned long flags; + unsigned int cpu = smp_processor_id(); verbose_printk(KERN_NOTICE "\n" KERN_NOTICE "SEQUENCER STATUS:\t\t%s\n", print_tainted()); verbose_printk(KERN_NOTICE " SEQSTAT: %08lx IPEND: %04lx SYSCFG: %04lx\n", @@ -1112,9 +1113,9 @@ unlock: if (((long)fp->seqstat & SEQSTAT_EXCAUSE) && (((long)fp->seqstat & SEQSTAT_EXCAUSE) != VEC_HWERR)) { - decode_address(buf, saved_dcplb_fault_addr); + decode_address(buf, cpu_pda[cpu].dcplb_fault_addr); verbose_printk(KERN_NOTICE "DCPLB_FAULT_ADDR: %s\n", buf); - decode_address(buf, saved_icplb_fault_addr); + decode_address(buf, cpu_pda[cpu].icplb_fault_addr); verbose_printk(KERN_NOTICE "ICPLB_FAULT_ADDR: %s\n", buf); } @@ -1153,20 +1154,21 @@ unlock: asmlinkage int sys_bfin_spinlock(int *spinlock)__attribute__((l1_text)); #endif -asmlinkage int sys_bfin_spinlock(int *spinlock) +static DEFINE_SPINLOCK(bfin_spinlock_lock); + +asmlinkage int sys_bfin_spinlock(int *p) { - int ret = 0; - int tmp = 0; + int ret, tmp = 0; - local_irq_disable(); - ret = get_user(tmp, spinlock); - if (ret == 0) { - if (tmp) + spin_lock(&bfin_spinlock_lock); /* This would also hold kernel preemption. */ + ret = get_user(tmp, p); + if (likely(ret == 0)) { + if (unlikely(tmp)) ret = 1; - tmp = 1; - put_user(tmp, spinlock); + else + put_user(1, p); } - local_irq_enable(); + spin_unlock(&bfin_spinlock_lock); return ret; } diff --git a/arch/blackfin/kernel/vmlinux.lds.S b/arch/blackfin/kernel/vmlinux.lds.S index 7d12c6692a65..4b4341da0585 100644 --- a/arch/blackfin/kernel/vmlinux.lds.S +++ b/arch/blackfin/kernel/vmlinux.lds.S @@ -68,6 +68,8 @@ SECTIONS __etext = .; } + NOTES + /* Just in case the first read only is a 32-bit access */ RO_DATA(4) @@ -109,7 +111,6 @@ SECTIONS #endif DATA_DATA - *(.data.*) CONSTRUCTORS /* make sure the init_task is aligned to the @@ -161,12 +162,14 @@ SECTIONS *(.con_initcall.init) ___con_initcall_end = .; } + PERCPU(4) SECURITY_INIT .init.ramfs : { . = ALIGN(4); ___initramfs_start = .; *(.init.ramfs) + . = ALIGN(4); ___initramfs_end = .; } @@ -212,7 +215,7 @@ SECTIONS __ebss_b_l1 = .; } - __l2_lma_start = .; + __l2_lma_start = LOADADDR(.data_b_l1) + SIZEOF(.data_b_l1); .text_data_l2 L2_START : AT(LOADADDR(.data_b_l1) + SIZEOF(.data_b_l1)) { @@ -240,7 +243,7 @@ SECTIONS /* Force trailing alignment of our init section so that when we * free our init memory, we don't leave behind a partial page. */ - . = LOADADDR(.data_b_l1) + SIZEOF(.data_b_l1); + . = LOADADDR(.text_data_l2) + SIZEOF(.text_data_l2); . = ALIGN(PAGE_SIZE); ___init_end = .; |