summaryrefslogtreecommitdiffstats
path: root/include/asm-arm/processor.h
blob: 445d4495be17a96db05417fa08b08f08741ff6b9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
/*
 *  linux/include/asm-arm/processor.h
 *
 *  Copyright (C) 1995-2002 Russell King
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#ifndef __ASM_ARM_PROCESSOR_H
#define __ASM_ARM_PROCESSOR_H

/*
 * Default implementation of macro that returns current
 * instruction pointer ("program counter").
 */
#define current_text_addr() ({ __label__ _l; _l: &&_l;})

#define FP_SIZE 35

struct fp_hard_struct {
	unsigned int save[FP_SIZE];		/* as yet undefined */
};

struct fp_soft_struct {
	unsigned int save[FP_SIZE];		/* undefined information */
};

union fp_state {
	struct fp_hard_struct	hard;
	struct fp_soft_struct	soft;
};

typedef unsigned long mm_segment_t;		/* domain register	*/

#ifdef __KERNEL__

#define EISA_bus 0
#define MCA_bus 0
#define MCA_bus__is_a_macro

#include <asm/atomic.h>
#include <asm/ptrace.h>
#if 0	/* XXX###XXX */
#include <asm/arch/memory.h>
#endif	/* XXX###XXX */
#include <asm/proc/processor.h>
#include <asm/types.h>

union debug_insn {
	u32	arm;
	u16	thumb;
};

struct debug_entry {
	u32			address;
	union debug_insn	insn;
};

struct debug_info {
	int			nsaved;
	struct debug_entry	bp[2];
};

struct thread_struct {
	atomic_t			refcount;
							/* fault info	  */
	unsigned long			address;
	unsigned long			trap_no;
	unsigned long			error_code;
							/* floating point */
	union fp_state			fpstate;
							/* debugging	  */
	struct debug_info		debug;
							/* context info	  */
	struct context_save_struct	*save;
	EXTRA_THREAD_STRUCT
};

#define INIT_THREAD  {					\
	refcount:	ATOMIC_INIT(1),			\
	EXTRA_THREAD_STRUCT_INIT			\
}

/*
 * Return saved PC of a blocked thread.
 */
static inline unsigned long thread_saved_pc(struct thread_struct *t)
{
	return t->save ? pc_pointer(t->save->pc) : 0;
}

static inline unsigned long thread_saved_fp(struct thread_struct *t)
{
	return t->save ? t->save->fp : 0;
}

/* Forward declaration, a strange C thing */
struct task_struct;

/* Free all resources held by a thread. */
extern void release_thread(struct task_struct *);

/* Copy and release all segment info associated with a VM */
#define copy_segments(tsk, mm)		do { } while (0)
#define release_segments(mm)		do { } while (0)

unsigned long get_wchan(struct task_struct *p);

#define THREAD_SIZE	(8192)

extern struct task_struct *alloc_task_struct(void);
extern void __free_task_struct(struct task_struct *);
#define get_task_struct(p)	atomic_inc(&(p)->thread.refcount)
#define free_task_struct(p)					\
 do {								\
	if (atomic_dec_and_test(&(p)->thread.refcount))		\
		__free_task_struct((p));			\
 } while (0)

#define init_task	(init_task_union.task)
#define init_stack	(init_task_union.stack)

#define cpu_relax()	barrier()

/*
 * Create a new kernel thread
 */
extern int arch_kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);

#endif

#endif /* __ASM_ARM_PROCESSOR_H */