135 lines
2.9 KiB
C
135 lines
2.9 KiB
C
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/*
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* linux/include/asm-arm/processor.h
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*
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* Copyright (C) 1995-2002 Russell King
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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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#define FP_SIZE 35
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struct fp_hard_struct {
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unsigned int save[FP_SIZE]; /* as yet undefined */
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};
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struct fp_soft_struct {
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unsigned int save[FP_SIZE]; /* undefined information */
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};
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union fp_state {
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struct fp_hard_struct hard;
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struct fp_soft_struct soft;
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};
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typedef unsigned long mm_segment_t; /* domain register */
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#ifdef __KERNEL__
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#define EISA_bus 0
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#define MCA_bus 0
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#define MCA_bus__is_a_macro
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#include <asm/atomic.h>
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#include <asm/ptrace.h>
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#if 0 /* XXX###XXX */
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#include <asm/arch/memory.h>
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#endif /* XXX###XXX */
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#include <asm/proc/processor.h>
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#include <asm/types.h>
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union debug_insn {
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u32 arm;
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u16 thumb;
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};
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struct debug_entry {
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u32 address;
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union debug_insn 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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atomic_t refcount;
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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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/* floating point */
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union fp_state fpstate;
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/* debugging */
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struct debug_info debug;
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/* context info */
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struct context_save_struct *save;
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EXTRA_THREAD_STRUCT
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};
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#define INIT_THREAD { \
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refcount: ATOMIC_INIT(1), \
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EXTRA_THREAD_STRUCT_INIT \
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}
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/*
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* Return saved PC of a blocked thread.
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*/
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static inline unsigned long thread_saved_pc(struct thread_struct *t)
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{
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return t->save ? pc_pointer(t->save->pc) : 0;
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}
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static inline unsigned long thread_saved_fp(struct thread_struct *t)
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{
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return t->save ? t->save->fp : 0;
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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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/* Copy and release all segment info associated with a VM */
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#define copy_segments(tsk, mm) do { } while (0)
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#define release_segments(mm) do { } while (0)
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unsigned long get_wchan(struct task_struct *p);
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#define THREAD_SIZE (8192)
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extern struct task_struct *alloc_task_struct(void);
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extern void __free_task_struct(struct task_struct *);
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#define get_task_struct(p) atomic_inc(&(p)->thread.refcount)
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#define free_task_struct(p) \
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do { \
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if (atomic_dec_and_test(&(p)->thread.refcount)) \
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__free_task_struct((p)); \
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} while (0)
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#define init_task (init_task_union.task)
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#define init_stack (init_task_union.stack)
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#define cpu_relax() barrier()
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/*
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* Create a new kernel thread
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*/
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extern int arch_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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