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 */ |