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/*
* linux/include/asm-arm26/processor.h
*
* Copyright (C) 1995 Russell King
* Copyright (C) 2003 Ian Molton
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ASM_ARM_PROCESSOR_H
#define __ASM_ARM_PROCESSOR_H
/*
* Default implementation of macro that returns current
* instruction pointer ("program counter").
*/
#define current_text_addr() ({ __label__ _l; _l: &&_l;})
#ifdef __KERNEL__
#include <asm/atomic.h>
#include <asm/ptrace.h>
#include <linux/string.h>
#define KERNEL_STACK_SIZE 4096
typedef struct {
void (*put_byte)(void); /* Special calling convention */
void (*get_byte)(void); /* Special calling convention */
void (*put_half)(void); /* Special calling convention */
void (*get_half)(void); /* Special calling convention */
void (*put_word)(void); /* Special calling convention */
void (*get_word)(void); /* Special calling convention */
void (*put_dword)(void); /* Special calling convention */
unsigned long (*copy_from_user)(void *to, const void *from, unsigned long sz);
unsigned long (*copy_to_user)(void *to, const void *from, unsigned long sz);
unsigned long (*clear_user)(void *addr, unsigned long sz);
unsigned long (*strncpy_from_user)(char *to, const char *from, unsigned long sz);
unsigned long (*strnlen_user)(const char *s, long n);
} uaccess_t;
extern uaccess_t uaccess_user, uaccess_kernel;
#define EXTRA_THREAD_STRUCT \
uaccess_t *uaccess; /* User access functions*/
#define EXTRA_THREAD_STRUCT_INIT \
.uaccess = &uaccess_kernel,
// FIXME?!!
#define start_thread(regs,pc,sp) \
({ \
unsigned long *stack = (unsigned long *)sp; \
set_fs(USER_DS); \
memzero(regs->uregs, sizeof (regs->uregs)); \
regs->ARM_pc = pc | ~0xfc000003; /* pc */ \
regs->ARM_sp = sp; /* sp */ \
regs->ARM_r2 = stack[2]; /* r2 (envp) */ \
regs->ARM_r1 = stack[1]; /* r1 (argv) */ \
regs->ARM_r0 = stack[0]; /* r0 (argc) */ \
})
#define KSTK_EIP(tsk) (((unsigned long *)(4096+(unsigned long)(tsk)))[1020])
#define KSTK_ESP(tsk) (((unsigned long *)(4096+(unsigned long)(tsk)))[1018])
struct debug_entry {
u32 address;
u32 insn;
};
struct debug_info {
int nsaved;
struct debug_entry bp[2];
};
struct thread_struct {
/* fault info */
unsigned long address;
unsigned long trap_no;
unsigned long error_code;
/* debugging */
struct debug_info debug;
EXTRA_THREAD_STRUCT
};
#define INIT_THREAD { \
EXTRA_THREAD_STRUCT_INIT \
}
/* Forward declaration, a strange C thing */
struct task_struct;
/* Free all resources held by a thread. */
extern void release_thread(struct task_struct *);
unsigned long get_wchan(struct task_struct *p);
#define cpu_relax() barrier()
/* Prepare to copy thread state - unlazy all lazy status */
#define prepare_to_copy(tsk) do { } while (0)
/*
* Create a new kernel thread
*/
extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
#endif
#endif /* __ASM_ARM_PROCESSOR_H */
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