/* * 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 */