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