Linux kernel mirror (for testing)
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linux
1/*
2 * linux/include/asm-arm26/processor.h
3 *
4 * Copyright (C) 1995 Russell King
5 * Copyright (C) 2003 Ian Molton
6 *
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.
10 */
11
12#ifndef __ASM_ARM_PROCESSOR_H
13#define __ASM_ARM_PROCESSOR_H
14
15/*
16 * Default implementation of macro that returns current
17 * instruction pointer ("program counter").
18 */
19#define current_text_addr() ({ __label__ _l; _l: &&_l;})
20
21#ifdef __KERNEL__
22
23#include <asm/atomic.h>
24#include <asm/ptrace.h>
25#include <linux/string.h>
26
27#define KERNEL_STACK_SIZE 4096
28
29typedef 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;
43
44extern uaccess_t uaccess_user, uaccess_kernel;
45
46#define EXTRA_THREAD_STRUCT \
47 uaccess_t *uaccess; /* User access functions*/
48
49#define EXTRA_THREAD_STRUCT_INIT \
50 .uaccess = &uaccess_kernel,
51
52// FIXME?!!
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 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) */ \
64})
65
66#define KSTK_EIP(tsk) (((unsigned long *)(4096+(unsigned long)(tsk)))[1020])
67#define KSTK_ESP(tsk) (((unsigned long *)(4096+(unsigned long)(tsk)))[1018])
68
69struct debug_entry {
70 u32 address;
71 u32 insn;
72};
73
74struct debug_info {
75 int nsaved;
76 struct debug_entry bp[2];
77};
78
79struct 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
87};
88
89#define INIT_THREAD { \
90EXTRA_THREAD_STRUCT_INIT \
91}
92
93/* Forward declaration, a strange C thing */
94struct task_struct;
95
96/* Free all resources held by a thread. */
97extern void release_thread(struct task_struct *);
98
99unsigned long get_wchan(struct task_struct *p);
100
101#define cpu_relax() barrier()
102
103/* Prepare to copy thread state - unlazy all lazy status */
104#define prepare_to_copy(tsk) do { } while (0)
105
106/*
107 * Create a new kernel thread
108 */
109extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
110
111#endif
112
113#endif /* __ASM_ARM_PROCESSOR_H */