| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * linux/include/asm-arm/processor.h |
| 3 | * |
| 4 | * Copyright (C) 1995-1999 Russell King |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | */ |
| 10 | |
| 11 | #ifndef __ASM_ARM_PROCESSOR_H |
| 12 | #define __ASM_ARM_PROCESSOR_H |
| 13 | |
| 14 | /* |
| 15 | * Default implementation of macro that returns current |
| 16 | * instruction pointer ("program counter"). |
| 17 | */ |
| 18 | #define current_text_addr() ({ __label__ _l; _l: &&_l;}) |
| 19 | |
| 20 | #ifdef __KERNEL__ |
| 21 | |
| 22 | #include <asm/ptrace.h> |
| 23 | #include <asm/procinfo.h> |
| 24 | #include <asm/types.h> |
| 25 | |
| 26 | #define KERNEL_STACK_SIZE PAGE_SIZE |
| 27 | |
| 28 | union debug_insn { |
| 29 | u32 arm; |
| 30 | u16 thumb; |
| 31 | }; |
| 32 | |
| 33 | struct debug_entry { |
| 34 | u32 address; |
| 35 | union debug_insn insn; |
| 36 | }; |
| 37 | |
| 38 | struct debug_info { |
| 39 | int nsaved; |
| 40 | struct debug_entry bp[2]; |
| 41 | }; |
| 42 | |
| 43 | struct thread_struct { |
| 44 | /* fault info */ |
| 45 | unsigned long address; |
| 46 | unsigned long trap_no; |
| 47 | unsigned long error_code; |
| 48 | /* debugging */ |
| 49 | struct debug_info debug; |
| 50 | }; |
| 51 | |
| 52 | #define INIT_THREAD { } |
| 53 | |
| 54 | #define start_thread(regs,pc,sp) \ |
| 55 | ({ \ |
| 56 | unsigned long *stack = (unsigned long *)sp; \ |
| 57 | set_fs(USER_DS); \ |
| 58 | memzero(regs->uregs, sizeof(regs->uregs)); \ |
| 59 | if (current->personality & ADDR_LIMIT_32BIT) \ |
| 60 | regs->ARM_cpsr = USR_MODE; \ |
| 61 | else \ |
| 62 | regs->ARM_cpsr = USR26_MODE; \ |
| 63 | if (elf_hwcap & HWCAP_THUMB && pc & 1) \ |
| 64 | regs->ARM_cpsr |= PSR_T_BIT; \ |
| 65 | regs->ARM_pc = pc & ~1; /* pc */ \ |
| 66 | regs->ARM_sp = sp; /* sp */ \ |
| 67 | regs->ARM_r2 = stack[2]; /* r2 (envp) */ \ |
| 68 | regs->ARM_r1 = stack[1]; /* r1 (argv) */ \ |
| 69 | regs->ARM_r0 = stack[0]; /* r0 (argc) */ \ |
| 70 | }) |
| 71 | |
| 72 | /* Forward declaration, a strange C thing */ |
| 73 | struct task_struct; |
| 74 | |
| 75 | /* Free all resources held by a thread. */ |
| 76 | extern void release_thread(struct task_struct *); |
| 77 | |
| 78 | /* Prepare to copy thread state - unlazy all lazy status */ |
| 79 | #define prepare_to_copy(tsk) do { } while (0) |
| 80 | |
| 81 | unsigned long get_wchan(struct task_struct *p); |
| 82 | |
| 83 | #define cpu_relax() barrier() |
| 84 | |
| 85 | /* |
| 86 | * Create a new kernel thread |
| 87 | */ |
| 88 | extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); |
| 89 | |
| 90 | #define KSTK_EIP(tsk) (((unsigned long *)(4096+(unsigned long)(tsk)->thread_info))[1019]) |
| 91 | #define KSTK_ESP(tsk) (((unsigned long *)(4096+(unsigned long)(tsk)->thread_info))[1017]) |
| 92 | |
| 93 | /* |
| 94 | * Prefetching support - only ARMv5. |
| 95 | */ |
| 96 | #if __LINUX_ARM_ARCH__ >= 5 |
| 97 | |
| 98 | #define ARCH_HAS_PREFETCH |
| 99 | #define prefetch(ptr) \ |
| 100 | ({ \ |
| 101 | __asm__ __volatile__( \ |
| 102 | "pld\t%0" \ |
| 103 | : \ |
| 104 | : "o" (*(char *)(ptr)) \ |
| 105 | : "cc"); \ |
| 106 | }) |
| 107 | |
| 108 | #define ARCH_HAS_PREFETCHW |
| 109 | #define prefetchw(ptr) prefetch(ptr) |
| 110 | |
| 111 | #define ARCH_HAS_SPINLOCK_PREFETCH |
| 112 | #define spin_lock_prefetch(x) do { } while (0) |
| 113 | |
| 114 | #endif |
| 115 | |
| 116 | #endif |
| 117 | |
| 118 | #endif /* __ASM_ARM_PROCESSOR_H */ |