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Diffstat (limited to 'arch/avr32/include/asm/processor.h')
| -rw-r--r-- | arch/avr32/include/asm/processor.h | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/arch/avr32/include/asm/processor.h b/arch/avr32/include/asm/processor.h new file mode 100644 index 000000000000..49a88f5a9d2f --- /dev/null +++ b/arch/avr32/include/asm/processor.h @@ -0,0 +1,178 @@ +/* + * Copyright (C) 2004-2006 Atmel Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef __ASM_AVR32_PROCESSOR_H +#define __ASM_AVR32_PROCESSOR_H + +#include <asm/page.h> +#include <asm/cache.h> + +#define TASK_SIZE 0x80000000 + +#ifdef __KERNEL__ +#define STACK_TOP TASK_SIZE +#define STACK_TOP_MAX STACK_TOP +#endif + +#ifndef __ASSEMBLY__ + +static inline void *current_text_addr(void) +{ + register void *pc asm("pc"); + return pc; +} + +enum arch_type { + ARCH_AVR32A, + ARCH_AVR32B, + ARCH_MAX +}; + +enum cpu_type { + CPU_MORGAN, + CPU_AT32AP, + CPU_MAX +}; + +enum tlb_config { + TLB_NONE, + TLB_SPLIT, + TLB_UNIFIED, + TLB_INVALID +}; + +#define AVR32_FEATURE_RMW (1 << 0) +#define AVR32_FEATURE_DSP (1 << 1) +#define AVR32_FEATURE_SIMD (1 << 2) +#define AVR32_FEATURE_OCD (1 << 3) +#define AVR32_FEATURE_PCTR (1 << 4) +#define AVR32_FEATURE_JAVA (1 << 5) +#define AVR32_FEATURE_FPU (1 << 6) + +struct avr32_cpuinfo { + struct clk *clk; + unsigned long loops_per_jiffy; + enum arch_type arch_type; + enum cpu_type cpu_type; + unsigned short arch_revision; + unsigned short cpu_revision; + enum tlb_config tlb_config; + unsigned long features; + u32 device_id; + + struct cache_info icache; + struct cache_info dcache; +}; + +static inline unsigned int avr32_get_manufacturer_id(struct avr32_cpuinfo *cpu) +{ + return (cpu->device_id >> 1) & 0x7f; +} +static inline unsigned int avr32_get_product_number(struct avr32_cpuinfo *cpu) +{ + return (cpu->device_id >> 12) & 0xffff; +} +static inline unsigned int avr32_get_chip_revision(struct avr32_cpuinfo *cpu) +{ + return (cpu->device_id >> 28) & 0x0f; +} + +extern struct avr32_cpuinfo boot_cpu_data; + +#ifdef CONFIG_SMP +extern struct avr32_cpuinfo cpu_data[]; +#define current_cpu_data cpu_data[smp_processor_id()] +#else +#define cpu_data (&boot_cpu_data) +#define current_cpu_data boot_cpu_data +#endif + +/* This decides where the kernel will search for a free chunk of vm + * space during mmap's + */ +#define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 3)) + +#define cpu_relax() barrier() +#define cpu_sync_pipeline() asm volatile("sub pc, -2" : : : "memory") + +struct cpu_context { + unsigned long sr; + unsigned long pc; + unsigned long ksp; /* Kernel stack pointer */ + unsigned long r7; + unsigned long r6; + unsigned long r5; + unsigned long r4; + unsigned long r3; + unsigned long r2; + unsigned long r1; + unsigned long r0; +}; + +/* This struct contains the CPU context as stored by switch_to() */ +struct thread_struct { + struct cpu_context cpu_context; + unsigned long single_step_addr; + u16 single_step_insn; +}; + +#define INIT_THREAD { \ + .cpu_context = { \ + .ksp = sizeof(init_stack) + (long)&init_stack, \ + }, \ +} + +/* + * Do necessary setup to start up a newly executed thread. + */ +#define start_thread(regs, new_pc, new_sp) \ + do { \ + set_fs(USER_DS); \ + memset(regs, 0, sizeof(*regs)); \ + regs->sr = MODE_USER; \ + regs->pc = new_pc & ~1; \ + regs->sp = new_sp; \ + } while(0) + +struct task_struct; + +/* Free all resources held by a thread */ +extern void release_thread(struct task_struct *); + +/* Create a kernel thread without removing it from tasklists */ +extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); + +/* Prepare to copy thread state - unlazy all lazy status */ +#define prepare_to_copy(tsk) do { } while(0) + +/* Return saved PC of a blocked thread */ +#define thread_saved_pc(tsk) ((tsk)->thread.cpu_context.pc) + +struct pt_regs; +extern unsigned long get_wchan(struct task_struct *p); +extern void show_regs_log_lvl(struct pt_regs *regs, const char *log_lvl); +extern void show_stack_log_lvl(struct task_struct *tsk, unsigned long sp, + struct pt_regs *regs, const char *log_lvl); + +#define task_pt_regs(p) \ + ((struct pt_regs *)(THREAD_SIZE + task_stack_page(p)) - 1) + +#define KSTK_EIP(tsk) ((tsk)->thread.cpu_context.pc) +#define KSTK_ESP(tsk) ((tsk)->thread.cpu_context.ksp) + +#define ARCH_HAS_PREFETCH + +static inline void prefetch(const void *x) +{ + const char *c = x; + asm volatile("pref %0" : : "r"(c)); +} +#define PREFETCH_STRIDE L1_CACHE_BYTES + +#endif /* __ASSEMBLY__ */ + +#endif /* __ASM_AVR32_PROCESSOR_H */ |