2 * linux/include/asm-arm/processor.h
4 * Copyright (C) 1995-2002 Russell King
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
11 #ifndef __ASM_ARM_PROCESSOR_H
12 #define __ASM_ARM_PROCESSOR_H
15 * Default implementation of macro that returns current
16 * instruction pointer ("program counter").
18 #define current_text_addr() ({ __label__ _l; _l: &&_l;})
22 struct fp_hard_struct {
23 unsigned int save[FP_SIZE]; /* as yet undefined */
26 struct fp_soft_struct {
27 unsigned int save[FP_SIZE]; /* undefined information */
31 struct fp_hard_struct hard;
32 struct fp_soft_struct soft;
35 typedef unsigned long mm_segment_t; /* domain register */
41 #define MCA_bus__is_a_macro
43 #include <asm/atomic.h>
44 #include <asm/ptrace.h>
45 #include <asm/arch/memory.h>
46 #include <asm/proc/processor.h>
47 #include <asm/types.h>
56 union debug_insn insn;
61 struct debug_entry bp[2];
64 struct thread_struct {
67 unsigned long address;
68 unsigned long trap_no;
69 unsigned long error_code;
71 union fp_state fpstate;
73 struct debug_info debug;
75 struct context_save_struct *save;
79 #define INIT_THREAD { \
80 refcount: ATOMIC_INIT(1), \
81 EXTRA_THREAD_STRUCT_INIT \
85 * Return saved PC of a blocked thread.
87 static inline unsigned long thread_saved_pc(struct thread_struct *t)
89 return t->save ? pc_pointer(t->save->pc) : 0;
92 static inline unsigned long thread_saved_fp(struct thread_struct *t)
94 return t->save ? t->save->fp : 0;
97 /* Forward declaration, a strange C thing */
100 /* Free all resources held by a thread. */
101 extern void release_thread(struct task_struct *);
103 /* Copy and release all segment info associated with a VM */
104 #define copy_segments(tsk, mm) do { } while (0)
105 #define release_segments(mm) do { } while (0)
107 unsigned long get_wchan(struct task_struct *p);
109 #define THREAD_SIZE (8192)
111 extern struct task_struct *alloc_task_struct(void);
112 extern void __free_task_struct(struct task_struct *);
113 #define get_task_struct(p) atomic_inc(&(p)->thread.refcount)
114 #define free_task_struct(p) \
116 if (atomic_dec_and_test(&(p)->thread.refcount)) \
117 __free_task_struct((p)); \
120 #define init_task (init_task_union.task)
121 #define init_stack (init_task_union.stack)
123 #define cpu_relax() barrier()
126 * Create a new kernel thread
128 extern int arch_kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
132 #endif /* __ASM_ARM_PROCESSOR_H */