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;})
25 #define MCA_bus__is_a_macro
27 #include <asm/atomic.h>
28 #include <asm/ptrace.h>
29 #include <linux/string.h>
31 #define KERNEL_STACK_SIZE 4096
34 void (*put_byte
)(void); /* Special calling convention */
35 void (*get_byte
)(void); /* Special calling convention */
36 void (*put_half
)(void); /* Special calling convention */
37 void (*get_half
)(void); /* Special calling convention */
38 void (*put_word
)(void); /* Special calling convention */
39 void (*get_word
)(void); /* Special calling convention */
40 void (*put_dword
)(void); /* Special calling convention */
41 unsigned long (*copy_from_user
)(void *to
, const void *from
, unsigned long sz
);
42 unsigned long (*copy_to_user
)(void *to
, const void *from
, unsigned long sz
);
43 unsigned long (*clear_user
)(void *addr
, unsigned long sz
);
44 unsigned long (*strncpy_from_user
)(char *to
, const char *from
, unsigned long sz
);
45 unsigned long (*strnlen_user
)(const char *s
, long n
);
48 extern uaccess_t uaccess_user
, uaccess_kernel
;
50 #define EXTRA_THREAD_STRUCT \
51 uaccess_t *uaccess; /* User access functions*/
53 #define EXTRA_THREAD_STRUCT_INIT \
54 uaccess: &uaccess_kernel,
58 #define start_thread(regs,pc,sp) \
60 unsigned long *stack = (unsigned long *)sp; \
62 memzero(regs->uregs, sizeof (regs->uregs)); \
63 regs->ARM_pc = pc | ~0xfc000003; /* 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) */ \
70 #define KSTK_EIP(tsk) (((unsigned long *)(4096+(unsigned long)(tsk)))[1020])
71 #define KSTK_ESP(tsk) (((unsigned long *)(4096+(unsigned long)(tsk)))[1018])
80 struct debug_entry bp
[2];
83 struct thread_struct
{
85 unsigned long address
;
86 unsigned long trap_no
;
87 unsigned long error_code
;
89 struct debug_info debug
;
93 #define INIT_THREAD { \
94 EXTRA_THREAD_STRUCT_INIT \
97 /* Forward declaration, a strange C thing */
100 /* Free all resources held by a thread. */
101 extern void release_thread(struct task_struct
*);
103 unsigned long get_wchan(struct task_struct
*p
);
105 #define cpu_relax() barrier()
107 /* Prepare to copy thread state - unlazy all lazy status */
108 #define prepare_to_copy(tsk) do { } while (0)
111 * Create a new kernel thread
113 extern int kernel_thread(int (*fn
)(void *), void *arg
, unsigned long flags
);
117 #endif /* __ASM_ARM_PROCESSOR_H */