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11#ifndef _ASM_MICROBLAZE_PROCESSOR_H
12#define _ASM_MICROBLAZE_PROCESSOR_H
13
14#include <asm/ptrace.h>
15#include <asm/setup.h>
16#include <asm/registers.h>
17#include <asm/segment.h>
18#include <asm/entry.h>
19#include <asm/current.h>
20
21# ifndef __ASSEMBLY__
22
23extern const struct seq_operations cpuinfo_op;
24
25# define cpu_relax() barrier()
26# define cpu_sleep() do {} while (0)
27# define prepare_to_copy(tsk) do {} while (0)
28
29#define task_pt_regs(tsk) \
30 (((struct pt_regs *)(THREAD_SIZE + task_stack_page(tsk))) - 1)
31
32
33void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long usp);
34
35# endif
36
37# ifndef CONFIG_MMU
38
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44
45
46# define TASK_SIZE (0x81000000 - 0x80000000)
47
48
49
50
51
52# define current_text_addr() ({ __label__ _l; _l: &&_l; })
53
54
55
56
57
58# define TASK_UNMAPPED_BASE 0
59
60
61struct task_struct;
62
63
64struct thread_struct { };
65# define INIT_THREAD { }
66
67
68static inline void release_thread(struct task_struct *dead_task)
69{
70}
71
72
73static inline void exit_thread(void)
74{
75}
76
77extern unsigned long thread_saved_pc(struct task_struct *t);
78
79extern unsigned long get_wchan(struct task_struct *p);
80
81
82
83
84extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
85
86# define KSTK_EIP(tsk) (0)
87# define KSTK_ESP(tsk) (0)
88
89# else
90
91
92
93
94
95# define TASK_SIZE (CONFIG_KERNEL_START)
96
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100
101# define TASK_UNMAPPED_BASE (TASK_SIZE / 8 * 3)
102
103# define THREAD_KSP 0
104
105# ifndef __ASSEMBLY__
106
107
108
109
110
111# define current_text_addr() ({ __label__ _l; _l: &&_l; })
112
113
114
115
116struct thread_struct {
117
118 unsigned long ksp;
119 unsigned long ksp_limit;
120 void *pgdir;
121 struct pt_regs *regs;
122};
123
124# define INIT_THREAD { \
125 .ksp = sizeof init_stack + (unsigned long)init_stack, \
126 .pgdir = swapper_pg_dir, \
127}
128
129
130void start_thread(struct pt_regs *regs,
131 unsigned long pc, unsigned long usp);
132
133
134extern inline void release_thread(struct task_struct *dead_task)
135{
136}
137
138extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
139
140
141static inline void exit_thread(void)
142{
143}
144
145
146# define thread_saved_pc(tsk) \
147 ((tsk)->thread.regs ? (tsk)->thread.regs->r15 : 0)
148
149unsigned long get_wchan(struct task_struct *p);
150
151
152# define KERNEL_STACK_SIZE 0x2000
153
154
155# define task_tos(task) ((unsigned long)(task) + KERNEL_STACK_SIZE)
156# define task_regs(task) ((struct pt_regs *)task_tos(task) - 1)
157
158# define task_pt_regs_plus_args(tsk) \
159 (((void *)task_pt_regs(tsk)) - STATE_SAVE_ARG_SPACE)
160
161# define task_sp(task) (task_regs(task)->r1)
162# define task_pc(task) (task_regs(task)->pc)
163
164# define KSTK_EIP(task) (task_pc(task))
165# define KSTK_ESP(task) (task_sp(task))
166
167
168# define deactivate_mm(tsk, mm) do { } while (0)
169
170# define STACK_TOP TASK_SIZE
171# define STACK_TOP_MAX STACK_TOP
172
173# endif
174# endif
175#endif
176