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/*
* linux/include/asm-arm/proc-armo/processor.h
*
* Copyright (C) 1996 Russell King.
*
* 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.
*
* Changelog:
* 27-06-1996 RMK Created
* 10-10-1996 RMK Brought up to date with SA110
* 26-09-1996 RMK Added 'EXTRA_THREAD_STRUCT*'
* 28-09-1996 RMK Moved start_thread into the processor dependencies
* 11-01-1998 RMK Added new uaccess_t
* 09-09-1998 PJB Delete redundant `wp_works_ok'
* 30-05-1999 PJB Save sl across context switches
*/
#ifndef __ASM_PROC_PROCESSOR_H
#define __ASM_PROC_PROCESSOR_H
#include <linux/string.h>
#define KERNEL_STACK_SIZE 4096
struct context_save_struct {
unsigned long r4;
unsigned long r5;
unsigned long r6;
unsigned long r7;
unsigned long r8;
unsigned long r9;
unsigned long sl;
unsigned long fp;
unsigned long pc;
};
#define INIT_CSS (struct context_save_struct){ 0, 0, 0, 0, 0, 0, 0, 0, SVC26_MODE }
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 */
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,
#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; /* 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)))[1022])
#define KSTK_ESP(tsk) (((unsigned long *)(4096+(unsigned long)(tsk)))[1020])
/* Allocation and freeing of basic task resources. */
/*
* NOTE! The task struct and the stack go together
*/
extern unsigned long get_page_8k(int priority);
extern void free_page_8k(unsigned long page);
#define ll_alloc_task_struct() ((struct task_struct *)get_page_8k(GFP_KERNEL))
#define ll_free_task_struct(p) free_page_8k((unsigned long)(p))
#endif
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