Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
4baa9922 | 2 | * arch/arm/include/asm/processor.h |
1da177e4 LT |
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 | ||
864232fa | 22 | #include <asm/hw_breakpoint.h> |
1da177e4 | 23 | #include <asm/ptrace.h> |
1da177e4 LT |
24 | #include <asm/types.h> |
25 | ||
922a70d3 | 26 | #ifdef __KERNEL__ |
794baba6 | 27 | #define STACK_TOP ((current->personality & ADDR_LIMIT_32BIT) ? \ |
922a70d3 DH |
28 | TASK_SIZE : TASK_SIZE_26) |
29 | #define STACK_TOP_MAX TASK_SIZE | |
30 | #endif | |
31 | ||
1da177e4 | 32 | struct debug_info { |
864232fa WD |
33 | #ifdef CONFIG_HAVE_HW_BREAKPOINT |
34 | struct perf_event *hbp[ARM_MAX_HBP_SLOTS]; | |
35 | #endif | |
1da177e4 LT |
36 | }; |
37 | ||
38 | struct thread_struct { | |
39 | /* fault info */ | |
40 | unsigned long address; | |
41 | unsigned long trap_no; | |
42 | unsigned long error_code; | |
43 | /* debugging */ | |
44 | struct debug_info debug; | |
45 | }; | |
46 | ||
47 | #define INIT_THREAD { } | |
48 | ||
e72b0475 HC |
49 | #ifdef CONFIG_MMU |
50 | #define nommu_start_thread(regs) do { } while (0) | |
51 | #else | |
52 | #define nommu_start_thread(regs) regs->ARM_r10 = current->mm->start_data | |
53 | #endif | |
54 | ||
1da177e4 LT |
55 | #define start_thread(regs,pc,sp) \ |
56 | ({ \ | |
57 | unsigned long *stack = (unsigned long *)sp; \ | |
59f0cb0f | 58 | memset(regs->uregs, 0, sizeof(regs->uregs)); \ |
1da177e4 LT |
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; \ | |
26584853 | 65 | regs->ARM_cpsr |= PSR_ENDSTATE; \ |
1da177e4 LT |
66 | regs->ARM_pc = pc & ~1; /* pc */ \ |
67 | regs->ARM_sp = sp; /* sp */ \ | |
68 | regs->ARM_r2 = stack[2]; /* r2 (envp) */ \ | |
69 | regs->ARM_r1 = stack[1]; /* r1 (argv) */ \ | |
70 | regs->ARM_r0 = stack[0]; /* r0 (argc) */ \ | |
e72b0475 | 71 | nommu_start_thread(regs); \ |
1da177e4 LT |
72 | }) |
73 | ||
74 | /* Forward declaration, a strange C thing */ | |
75 | struct task_struct; | |
76 | ||
77 | /* Free all resources held by a thread. */ | |
78 | extern void release_thread(struct task_struct *); | |
79 | ||
1da177e4 LT |
80 | unsigned long get_wchan(struct task_struct *p); |
81 | ||
5dab26af | 82 | #if __LINUX_ARM_ARCH__ == 6 || defined(CONFIG_ARM_ERRATA_754327) |
534be1d5 WD |
83 | #define cpu_relax() smp_mb() |
84 | #else | |
1da177e4 | 85 | #define cpu_relax() barrier() |
534be1d5 | 86 | #endif |
1da177e4 | 87 | |
815d5ec8 | 88 | #define task_pt_regs(p) \ |
32d39a93 | 89 | ((struct pt_regs *)(THREAD_START_SP + task_stack_page(p)) - 1) |
815d5ec8 AV |
90 | |
91 | #define KSTK_EIP(tsk) task_pt_regs(tsk)->ARM_pc | |
92 | #define KSTK_ESP(tsk) task_pt_regs(tsk)->ARM_sp | |
1da177e4 LT |
93 | |
94 | /* | |
95 | * Prefetching support - only ARMv5. | |
96 | */ | |
97 | #if __LINUX_ARM_ARCH__ >= 5 | |
98 | ||
99 | #define ARCH_HAS_PREFETCH | |
02828845 NP |
100 | static inline void prefetch(const void *ptr) |
101 | { | |
102 | __asm__ __volatile__( | |
16f719de | 103 | "pld\t%a0" |
02828845 | 104 | : |
16f719de | 105 | : "p" (ptr) |
02828845 NP |
106 | : "cc"); |
107 | } | |
1da177e4 LT |
108 | |
109 | #define ARCH_HAS_PREFETCHW | |
110 | #define prefetchw(ptr) prefetch(ptr) | |
111 | ||
112 | #define ARCH_HAS_SPINLOCK_PREFETCH | |
113 | #define spin_lock_prefetch(x) do { } while (0) | |
114 | ||
115 | #endif | |
116 | ||
7dbaa466 RH |
117 | #define HAVE_ARCH_PICK_MMAP_LAYOUT |
118 | ||
1da177e4 LT |
119 | #endif |
120 | ||
121 | #endif /* __ASM_ARM_PROCESSOR_H */ |