Linux 2.6.12-rc6
[cris-mirror.git] / include / asm-arm26 / processor.h
blob1d2d5f7b467b951568e5e04704a3df12ff90ecaf
1 /*
2 * linux/include/asm-arm26/processor.h
4 * Copyright (C) 1995 Russell King
5 * Copyright (C) 2003 Ian Molton
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 #ifndef __ASM_ARM_PROCESSOR_H
13 #define __ASM_ARM_PROCESSOR_H
16 * Default implementation of macro that returns current
17 * instruction pointer ("program counter").
19 #define current_text_addr() ({ __label__ _l; _l: &&_l;})
21 #ifdef __KERNEL__
23 #include <asm/atomic.h>
24 #include <asm/ptrace.h>
25 #include <linux/string.h>
27 #define KERNEL_STACK_SIZE 4096
29 typedef struct {
30 void (*put_byte)(void); /* Special calling convention */
31 void (*get_byte)(void); /* Special calling convention */
32 void (*put_half)(void); /* Special calling convention */
33 void (*get_half)(void); /* Special calling convention */
34 void (*put_word)(void); /* Special calling convention */
35 void (*get_word)(void); /* Special calling convention */
36 void (*put_dword)(void); /* Special calling convention */
37 unsigned long (*copy_from_user)(void *to, const void *from, unsigned long sz);
38 unsigned long (*copy_to_user)(void *to, const void *from, unsigned long sz);
39 unsigned long (*clear_user)(void *addr, unsigned long sz);
40 unsigned long (*strncpy_from_user)(char *to, const char *from, unsigned long sz);
41 unsigned long (*strnlen_user)(const char *s, long n);
42 } uaccess_t;
44 extern uaccess_t uaccess_user, uaccess_kernel;
46 #define EXTRA_THREAD_STRUCT \
47 uaccess_t *uaccess; /* User access functions*/
49 #define EXTRA_THREAD_STRUCT_INIT \
50 .uaccess = &uaccess_kernel,
52 // FIXME?!!
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 regs->ARM_pc = pc | ~0xfc000003; /* pc */ \
60 regs->ARM_sp = sp; /* sp */ \
61 regs->ARM_r2 = stack[2]; /* r2 (envp) */ \
62 regs->ARM_r1 = stack[1]; /* r1 (argv) */ \
63 regs->ARM_r0 = stack[0]; /* r0 (argc) */ \
66 #define KSTK_EIP(tsk) (((unsigned long *)(4096+(unsigned long)(tsk)))[1020])
67 #define KSTK_ESP(tsk) (((unsigned long *)(4096+(unsigned long)(tsk)))[1018])
69 struct debug_entry {
70 u32 address;
71 u32 insn;
74 struct debug_info {
75 int nsaved;
76 struct debug_entry bp[2];
79 struct thread_struct {
80 /* fault info */
81 unsigned long address;
82 unsigned long trap_no;
83 unsigned long error_code;
84 /* debugging */
85 struct debug_info debug;
86 EXTRA_THREAD_STRUCT
89 #define INIT_THREAD { \
90 EXTRA_THREAD_STRUCT_INIT \
93 /* Forward declaration, a strange C thing */
94 struct task_struct;
96 /* Free all resources held by a thread. */
97 extern void release_thread(struct task_struct *);
99 unsigned long get_wchan(struct task_struct *p);
101 #define cpu_relax() barrier()
103 /* Prepare to copy thread state - unlazy all lazy status */
104 #define prepare_to_copy(tsk) do { } while (0)
107 * Create a new kernel thread
109 extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
111 #endif
113 #endif /* __ASM_ARM_PROCESSOR_H */