projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
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 | ||
| 1da177e4 LT |
26 | union debug_insn { |
| 27 | u32 arm; | |
| 28 | u16 thumb; | |
| 29 | }; | |
| 30 | ||
| 31 | struct debug_entry { | |
| 32 | u32 address; | |
| 33 | union debug_insn insn; | |
| 34 | }; | |
| 35 | ||
| 36 | struct debug_info { | |
| 37 | int nsaved; | |
| 38 | struct debug_entry bp[2]; | |
| 39 | }; | |
| 40 | ||
| 41 | struct thread_struct { | |
| 42 | /* fault info */ | |
| 43 | unsigned long address; | |
| 44 | unsigned long trap_no; | |
| 45 | unsigned long error_code; | |
| 46 | /* debugging */ | |
| 47 | struct debug_info debug; | |
| 48 | }; | |
| 49 | ||
| 50 | #define INIT_THREAD { } | |
| 51 | ||
| 52 | #define start_thread(regs,pc,sp) \ | |
| 53 | ({ \ | |
| 54 | unsigned long *stack = (unsigned long *)sp; \ | |
| 55 | set_fs(USER_DS); \ | |
| 56 | memzero(regs->uregs, sizeof(regs->uregs)); \ | |
| 57 | if (current->personality & ADDR_LIMIT_32BIT) \ | |
| 58 | regs->ARM_cpsr = USR_MODE; \ | |
| 59 | else \ | |
| 60 | regs->ARM_cpsr = USR26_MODE; \ | |
| 61 | if (elf_hwcap & HWCAP_THUMB && pc & 1) \ | |
| 62 | regs->ARM_cpsr |= PSR_T_BIT; \ | |
| 63 | regs->ARM_pc = pc & ~1; /* pc */ \ | |
| 64 | regs->ARM_sp = sp; /* sp */ \ | |
| 65 | regs->ARM_r2 = stack[2]; /* r2 (envp) */ \ | |
| 66 | regs->ARM_r1 = stack[1]; /* r1 (argv) */ \ | |
| 67 | regs->ARM_r0 = stack[0]; /* r0 (argc) */ \ | |
| 68 | }) | |
| 69 | ||
| 70 | /* Forward declaration, a strange C thing */ | |
| 71 | struct task_struct; | |
| 72 | ||
| 73 | /* Free all resources held by a thread. */ | |
| 74 | extern void release_thread(struct task_struct *); | |
| 75 | ||
| 76 | /* Prepare to copy thread state - unlazy all lazy status */ | |
| 77 | #define prepare_to_copy(tsk) do { } while (0) | |
| 78 | ||
| 79 | unsigned long get_wchan(struct task_struct *p); | |
| 80 | ||
| 81 | #define cpu_relax() barrier() | |
| 82 | ||
| 83 | /* | |
| 84 | * Create a new kernel thread | |
| 85 | */ | |
| 86 | extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); | |
| 87 | ||
| 4f7a1812 RK |
88 | #define KSTK_REGS(tsk) (((struct pt_regs *)(THREAD_START_SP + (unsigned long)(tsk)->thread_info)) - 1) |
| 89 | #define KSTK_EIP(tsk) KSTK_REGS(tsk)->ARM_pc | |
| 90 | #define KSTK_ESP(tsk) KSTK_REGS(tsk)->ARM_sp | |
| 1da177e4 LT |
91 | |
| 92 | /* | |
| 93 | * Prefetching support - only ARMv5. | |
| 94 | */ | |
| 95 | #if __LINUX_ARM_ARCH__ >= 5 | |
| 96 | ||
| 97 | #define ARCH_HAS_PREFETCH | |
| 98 | #define prefetch(ptr) \ | |
| 99 | ({ \ | |
| 100 | __asm__ __volatile__( \ | |
| 101 | "pld\t%0" \ | |
| 102 | : \ | |
| 103 | : "o" (*(char *)(ptr)) \ | |
| 104 | : "cc"); \ | |
| 105 | }) | |
| 106 | ||
| 107 | #define ARCH_HAS_PREFETCHW | |
| 108 | #define prefetchw(ptr) prefetch(ptr) | |
| 109 | ||
| 110 | #define ARCH_HAS_SPINLOCK_PREFETCH | |
| 111 | #define spin_lock_prefetch(x) do { } while (0) | |
| 112 | ||
| 113 | #endif | |
| 114 | ||
| 115 | #endif | |
| 116 | ||
| 117 | #endif /* __ASM_ARM_PROCESSOR_H */ |