v2.4.9.10 -> v2.4.9.11
[opensuse:kernel.git] / include / asm-arm / processor.h
1 /*
2  *  linux/include/asm-arm/processor.h
3  *
4  *  Copyright (C) 1995 Russell King
5  *
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.
9  */
10
11 #ifndef __ASM_ARM_PROCESSOR_H
12 #define __ASM_ARM_PROCESSOR_H
13
14 /*
15  * Default implementation of macro that returns current
16  * instruction pointer ("program counter").
17  */
18 #define current_text_addr() ({ __label__ _l; _l: &&_l;})
19
20 #define FP_SIZE 35
21
22 struct fp_hard_struct {
23         unsigned int save[FP_SIZE];             /* as yet undefined */
24 };
25
26 struct fp_soft_struct {
27         unsigned int save[FP_SIZE];             /* undefined information */
28 };
29
30 union fp_state {
31         struct fp_hard_struct   hard;
32         struct fp_soft_struct   soft;
33 };
34
35 typedef unsigned long mm_segment_t;             /* domain register      */
36
37 #ifdef __KERNEL__
38
39 #define EISA_bus 0
40 #define MCA_bus 0
41 #define MCA_bus__is_a_macro
42
43 #include <asm/atomic.h>
44 #include <asm/ptrace.h>
45 #include <asm/arch/memory.h>
46 #include <asm/proc/processor.h>
47
48 struct debug_info {
49         int                             nsaved;
50         struct {
51                 unsigned long           address;
52                 unsigned long           insn;
53         } bp[2];
54 };
55
56 struct thread_struct {
57         atomic_t                        refcount;
58                                                         /* fault info     */
59         unsigned long                   address;
60         unsigned long                   trap_no;
61         unsigned long                   error_code;
62                                                         /* floating point */
63         union fp_state                  fpstate;
64                                                         /* debugging      */
65         struct debug_info               debug;
66                                                         /* context info   */
67         struct context_save_struct      *save;
68         EXTRA_THREAD_STRUCT
69 };
70
71 #define INIT_THREAD  {                                  \
72         refcount:       ATOMIC_INIT(1),                 \
73         EXTRA_THREAD_STRUCT_INIT                        \
74 }
75
76 /*
77  * Return saved PC of a blocked thread.
78  */
79 static inline unsigned long thread_saved_pc(struct thread_struct *t)
80 {
81         return t->save ? pc_pointer(t->save->pc) : 0;
82 }
83
84 static inline unsigned long get_css_fp(struct thread_struct *t)
85 {
86         return t->save ? t->save->fp : 0;
87 }
88
89 /* Forward declaration, a strange C thing */
90 struct task_struct;
91
92 /* Free all resources held by a thread. */
93 extern void release_thread(struct task_struct *);
94
95 /* Copy and release all segment info associated with a VM */
96 #define copy_segments(tsk, mm)          do { } while (0)
97 #define release_segments(mm)            do { } while (0)
98
99 unsigned long get_wchan(struct task_struct *p);
100
101 #define THREAD_SIZE     (8192)
102
103 extern struct task_struct *alloc_task_struct(void);
104 extern void __free_task_struct(struct task_struct *);
105 #define get_task_struct(p)      atomic_inc(&(p)->thread.refcount)
106 #define free_task_struct(p)                                     \
107  do {                                                           \
108         if (atomic_dec_and_test(&(p)->thread.refcount))         \
109                 __free_task_struct((p));                        \
110  } while (0)
111
112 #define init_task       (init_task_union.task)
113 #define init_stack      (init_task_union.stack)
114
115 /*
116  * Create a new kernel thread
117  */
118 extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
119
120 #endif
121
122 #endif /* __ASM_ARM_PROCESSOR_H */