| Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2004-2006 Atmel Corporation |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 as |
| 6 | * published by the Free Software Foundation. |
| 7 | */ |
| 8 | #ifndef __ASM_AVR32_PROCESSOR_H |
| 9 | #define __ASM_AVR32_PROCESSOR_H |
| 10 | |
| 11 | #include <asm/page.h> |
| 12 | #include <asm/cache.h> |
| 13 | |
| 14 | #define TASK_SIZE 0x80000000 |
| 15 | |
| 16 | #ifndef __ASSEMBLY__ |
| 17 | |
| 18 | static inline void *current_text_addr(void) |
| 19 | { |
| 20 | register void *pc asm("pc"); |
| 21 | return pc; |
| 22 | } |
| 23 | |
| 24 | enum arch_type { |
| 25 | ARCH_AVR32A, |
| 26 | ARCH_AVR32B, |
| 27 | ARCH_MAX |
| 28 | }; |
| 29 | |
| 30 | enum cpu_type { |
| 31 | CPU_MORGAN, |
| 32 | CPU_AT32AP, |
| 33 | CPU_MAX |
| 34 | }; |
| 35 | |
| 36 | enum tlb_config { |
| 37 | TLB_NONE, |
| 38 | TLB_SPLIT, |
| 39 | TLB_UNIFIED, |
| 40 | TLB_INVALID |
| 41 | }; |
| 42 | |
| 43 | struct avr32_cpuinfo { |
| 44 | struct clk *clk; |
| 45 | unsigned long loops_per_jiffy; |
| 46 | enum arch_type arch_type; |
| 47 | enum cpu_type cpu_type; |
| 48 | unsigned short arch_revision; |
| 49 | unsigned short cpu_revision; |
| 50 | enum tlb_config tlb_config; |
| 51 | |
| 52 | struct cache_info icache; |
| 53 | struct cache_info dcache; |
| 54 | }; |
| 55 | |
| 56 | extern struct avr32_cpuinfo boot_cpu_data; |
| 57 | |
| 58 | #ifdef CONFIG_SMP |
| 59 | extern struct avr32_cpuinfo cpu_data[]; |
| 60 | #define current_cpu_data cpu_data[smp_processor_id()] |
| 61 | #else |
| 62 | #define cpu_data (&boot_cpu_data) |
| 63 | #define current_cpu_data boot_cpu_data |
| 64 | #endif |
| 65 | |
| 66 | /* This decides where the kernel will search for a free chunk of vm |
| 67 | * space during mmap's |
| 68 | */ |
| 69 | #define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 3)) |
| 70 | |
| 71 | #define cpu_relax() barrier() |
| 72 | #define cpu_sync_pipeline() asm volatile("sub pc, -2" : : : "memory") |
| 73 | |
| 74 | struct cpu_context { |
| 75 | unsigned long sr; |
| 76 | unsigned long pc; |
| 77 | unsigned long ksp; /* Kernel stack pointer */ |
| 78 | unsigned long r7; |
| 79 | unsigned long r6; |
| 80 | unsigned long r5; |
| 81 | unsigned long r4; |
| 82 | unsigned long r3; |
| 83 | unsigned long r2; |
| 84 | unsigned long r1; |
| 85 | unsigned long r0; |
| 86 | }; |
| 87 | |
| 88 | /* This struct contains the CPU context as stored by switch_to() */ |
| 89 | struct thread_struct { |
| 90 | struct cpu_context cpu_context; |
| 91 | unsigned long single_step_addr; |
| 92 | u16 single_step_insn; |
| 93 | }; |
| 94 | |
| 95 | #define INIT_THREAD { \ |
| 96 | .cpu_context = { \ |
| 97 | .ksp = sizeof(init_stack) + (long)&init_stack, \ |
| 98 | }, \ |
| 99 | } |
| 100 | |
| 101 | /* |
| 102 | * Do necessary setup to start up a newly executed thread. |
| 103 | */ |
| 104 | #define start_thread(regs, new_pc, new_sp) \ |
| 105 | do { \ |
| 106 | set_fs(USER_DS); \ |
| 107 | memset(regs, 0, sizeof(*regs)); \ |
| 108 | regs->sr = MODE_USER; \ |
| 109 | regs->pc = new_pc & ~1; \ |
| 110 | regs->sp = new_sp; \ |
| 111 | } while(0) |
| 112 | |
| 113 | struct task_struct; |
| 114 | |
| 115 | /* Free all resources held by a thread */ |
| 116 | extern void release_thread(struct task_struct *); |
| 117 | |
| 118 | /* Create a kernel thread without removing it from tasklists */ |
| 119 | extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); |
| 120 | |
| 121 | /* Prepare to copy thread state - unlazy all lazy status */ |
| 122 | #define prepare_to_copy(tsk) do { } while(0) |
| 123 | |
| 124 | /* Return saved PC of a blocked thread */ |
| 125 | #define thread_saved_pc(tsk) ((tsk)->thread.cpu_context.pc) |
| 126 | |
| 127 | struct pt_regs; |
| 128 | void show_trace(struct task_struct *task, unsigned long *stack, |
| 129 | struct pt_regs *regs); |
| 130 | |
| 131 | extern unsigned long get_wchan(struct task_struct *p); |
| 132 | |
| 133 | #define KSTK_EIP(tsk) ((tsk)->thread.cpu_context.pc) |
| 134 | #define KSTK_ESP(tsk) ((tsk)->thread.cpu_context.ksp) |
| 135 | |
| 136 | #define ARCH_HAS_PREFETCH |
| 137 | |
| 138 | static inline void prefetch(const void *x) |
| 139 | { |
| 140 | const char *c = x; |
| 141 | asm volatile("pref %0" : : "r"(c)); |
| 142 | } |
| 143 | #define PREFETCH_STRIDE L1_CACHE_BYTES |
| 144 | |
| 145 | #endif /* __ASSEMBLY__ */ |
| 146 | |
| 147 | #endif /* __ASM_AVR32_PROCESSOR_H */ |