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b783edae WD |
1 | /* |
2 | * linux/include/asm-arm/processor.h | |
3 | * | |
4 | * Copyright (C) 1995-2002 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 | #if 0 /* XXX###XXX */ | |
46 | #include <asm/arch/memory.h> | |
47 | #endif /* XXX###XXX */ | |
48 | #include <asm/proc/processor.h> | |
49 | #include <asm/types.h> | |
50 | ||
51 | union debug_insn { | |
52 | u32 arm; | |
53 | u16 thumb; | |
54 | }; | |
55 | ||
56 | struct debug_entry { | |
57 | u32 address; | |
58 | union debug_insn insn; | |
59 | }; | |
60 | ||
61 | struct debug_info { | |
62 | int nsaved; | |
63 | struct debug_entry bp[2]; | |
64 | }; | |
65 | ||
66 | struct thread_struct { | |
67 | atomic_t refcount; | |
68 | /* fault info */ | |
69 | unsigned long address; | |
70 | unsigned long trap_no; | |
71 | unsigned long error_code; | |
72 | /* floating point */ | |
73 | union fp_state fpstate; | |
74 | /* debugging */ | |
75 | struct debug_info debug; | |
76 | /* context info */ | |
77 | struct context_save_struct *save; | |
78 | EXTRA_THREAD_STRUCT | |
79 | }; | |
80 | ||
81 | #define INIT_THREAD { \ | |
82 | refcount: ATOMIC_INIT(1), \ | |
83 | EXTRA_THREAD_STRUCT_INIT \ | |
84 | } | |
85 | ||
86 | /* | |
87 | * Return saved PC of a blocked thread. | |
88 | */ | |
89 | static inline unsigned long thread_saved_pc(struct thread_struct *t) | |
90 | { | |
91 | return t->save ? pc_pointer(t->save->pc) : 0; | |
92 | } | |
93 | ||
94 | static inline unsigned long thread_saved_fp(struct thread_struct *t) | |
95 | { | |
96 | return t->save ? t->save->fp : 0; | |
97 | } | |
98 | ||
99 | /* Forward declaration, a strange C thing */ | |
100 | struct task_struct; | |
101 | ||
102 | /* Free all resources held by a thread. */ | |
103 | extern void release_thread(struct task_struct *); | |
104 | ||
105 | /* Copy and release all segment info associated with a VM */ | |
106 | #define copy_segments(tsk, mm) do { } while (0) | |
107 | #define release_segments(mm) do { } while (0) | |
108 | ||
109 | unsigned long get_wchan(struct task_struct *p); | |
110 | ||
111 | #define THREAD_SIZE (8192) | |
112 | ||
113 | extern struct task_struct *alloc_task_struct(void); | |
114 | extern void __free_task_struct(struct task_struct *); | |
115 | #define get_task_struct(p) atomic_inc(&(p)->thread.refcount) | |
116 | #define free_task_struct(p) \ | |
117 | do { \ | |
118 | if (atomic_dec_and_test(&(p)->thread.refcount)) \ | |
119 | __free_task_struct((p)); \ | |
120 | } while (0) | |
121 | ||
122 | #define init_task (init_task_union.task) | |
123 | #define init_stack (init_task_union.stack) | |
124 | ||
125 | #define cpu_relax() barrier() | |
126 | ||
127 | /* | |
128 | * Create a new kernel thread | |
129 | */ | |
130 | extern int arch_kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); | |
131 | ||
132 | #endif | |
133 | ||
134 | #endif /* __ASM_ARM_PROCESSOR_H */ |