/* * 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 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)))[1020]) #define KSTK_ESP(tsk) (((unsigned long *)(4096+(unsigned long)(tsk)))[1018]) #endif