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authorGuanXuetao <gxt@mprc.pku.edu.cn>2011-01-15 05:16:21 -0500
committerGuanXuetao <gxt@mprc.pku.edu.cn>2011-03-16 21:19:07 -0400
commitf73670e8a55c11d47c28dca35dc4bc7dfbd4e6eb (patch)
treebcf5641d487714be3a1317099769cecbedf4be85 /arch/unicore32/include
parent141c943fd4b323bae2b47f67743dba96134afb1f (diff)
unicore32 core architecture: process/thread related codes
This patch implements process/thread related codes. Backtrace and stacktrace are here. Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/unicore32/include')
-rw-r--r--arch/unicore32/include/asm/stacktrace.h31
-rw-r--r--arch/unicore32/include/asm/thread_info.h154
2 files changed, 185 insertions, 0 deletions
diff --git a/arch/unicore32/include/asm/stacktrace.h b/arch/unicore32/include/asm/stacktrace.h
new file mode 100644
index 000000000000..76edc65a5871
--- /dev/null
+++ b/arch/unicore32/include/asm/stacktrace.h
@@ -0,0 +1,31 @@
1/*
2 * linux/arch/unicore32/include/asm/stacktrace.h
3 *
4 * Code specific to PKUnity SoC and UniCore ISA
5 *
6 * Copyright (C) 2001-2010 GUAN Xue-tao
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13#ifndef __UNICORE_STACKTRACE_H__
14#define __UNICORE_STACKTRACE_H__
15
16struct stackframe {
17 unsigned long fp;
18 unsigned long sp;
19 unsigned long lr;
20 unsigned long pc;
21};
22
23#ifdef CONFIG_FRAME_POINTER
24extern int unwind_frame(struct stackframe *frame);
25#else
26#define unwind_frame(f) (-EINVAL)
27#endif
28extern void walk_stackframe(struct stackframe *frame,
29 int (*fn)(struct stackframe *, void *), void *data);
30
31#endif /* __UNICORE_STACKTRACE_H__ */
diff --git a/arch/unicore32/include/asm/thread_info.h b/arch/unicore32/include/asm/thread_info.h
new file mode 100644
index 000000000000..c270e9e04861
--- /dev/null
+++ b/arch/unicore32/include/asm/thread_info.h
@@ -0,0 +1,154 @@
1/*
2 * linux/arch/unicore32/include/asm/thread_info.h
3 *
4 * Code specific to PKUnity SoC and UniCore ISA
5 *
6 * Copyright (C) 2001-2010 GUAN Xue-tao
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12#ifndef __UNICORE_THREAD_INFO_H__
13#define __UNICORE_THREAD_INFO_H__
14
15#ifdef __KERNEL__
16
17#include <linux/compiler.h>
18#include <asm/fpstate.h>
19
20#define THREAD_SIZE_ORDER 1
21#define THREAD_SIZE 8192
22#define THREAD_START_SP (THREAD_SIZE - 8)
23
24#ifndef __ASSEMBLY__
25
26struct task_struct;
27struct exec_domain;
28
29#include <asm/types.h>
30
31typedef struct {
32 unsigned long seg;
33} mm_segment_t;
34
35struct cpu_context_save {
36 __u32 r4;
37 __u32 r5;
38 __u32 r6;
39 __u32 r7;
40 __u32 r8;
41 __u32 r9;
42 __u32 r10;
43 __u32 r11;
44 __u32 r12;
45 __u32 r13;
46 __u32 r14;
47 __u32 r15;
48 __u32 r16;
49 __u32 r17;
50 __u32 r18;
51 __u32 r19;
52 __u32 r20;
53 __u32 r21;
54 __u32 r22;
55 __u32 r23;
56 __u32 r24;
57 __u32 r25;
58 __u32 r26;
59 __u32 fp;
60 __u32 sp;
61 __u32 pc;
62};
63
64/*
65 * low level task data that entry.S needs immediate access to.
66 * __switch_to() assumes cpu_context follows immediately after cpu_domain.
67 */
68struct thread_info {
69 unsigned long flags; /* low level flags */
70 int preempt_count; /* 0 => preemptable */
71 /* <0 => bug */
72 mm_segment_t addr_limit; /* address limit */
73 struct task_struct *task; /* main task structure */
74 struct exec_domain *exec_domain; /* execution domain */
75 __u32 cpu; /* cpu */
76 struct cpu_context_save cpu_context; /* cpu context */
77 __u32 syscall; /* syscall number */
78 __u8 used_cp[16]; /* thread used copro */
79#ifdef CONFIG_UNICORE_FPU_F64
80 struct fp_state fpstate __attribute__((aligned(8)));
81#endif
82 struct restart_block restart_block;
83};
84
85#define INIT_THREAD_INFO(tsk) \
86{ \
87 .task = &tsk, \
88 .exec_domain = &default_exec_domain, \
89 .flags = 0, \
90 .preempt_count = INIT_PREEMPT_COUNT, \
91 .addr_limit = KERNEL_DS, \
92 .restart_block = { \
93 .fn = do_no_restart_syscall, \
94 }, \
95}
96
97#define init_thread_info (init_thread_union.thread_info)
98#define init_stack (init_thread_union.stack)
99
100/*
101 * how to get the thread information struct from C
102 */
103static inline struct thread_info *current_thread_info(void) __attribute_const__;
104
105static inline struct thread_info *current_thread_info(void)
106{
107 register unsigned long sp asm ("sp");
108 return (struct thread_info *)(sp & ~(THREAD_SIZE - 1));
109}
110
111#define thread_saved_pc(tsk) \
112 ((unsigned long)(task_thread_info(tsk)->cpu_context.pc))
113#define thread_saved_sp(tsk) \
114 ((unsigned long)(task_thread_info(tsk)->cpu_context.sp))
115#define thread_saved_fp(tsk) \
116 ((unsigned long)(task_thread_info(tsk)->cpu_context.fp))
117
118#endif
119
120/*
121 * We use bit 30 of the preempt_count to indicate that kernel
122 * preemption is occurring. See <asm/hardirq.h>.
123 */
124#define PREEMPT_ACTIVE 0x40000000
125
126/*
127 * thread information flags:
128 * TIF_SYSCALL_TRACE - syscall trace active
129 * TIF_SIGPENDING - signal pending
130 * TIF_NEED_RESCHED - rescheduling necessary
131 * TIF_NOTIFY_RESUME - callback before returning to user
132 */
133#define TIF_SIGPENDING 0
134#define TIF_NEED_RESCHED 1
135#define TIF_NOTIFY_RESUME 2 /* callback before returning to user */
136#define TIF_SYSCALL_TRACE 8
137#define TIF_MEMDIE 18
138#define TIF_FREEZE 19
139#define TIF_RESTORE_SIGMASK 20
140
141#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
142#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
143#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
144#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
145#define _TIF_FREEZE (1 << TIF_FREEZE)
146#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
147
148/*
149 * Change these and you break ASM code in entry-common.S
150 */
151#define _TIF_WORK_MASK 0x000000ff
152
153#endif /* __KERNEL__ */
154#endif /* __UNICORE_THREAD_INFO_H__ */
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