/* * 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 */