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4684dade MS |
1 | /* |
2 | * Copyright (C) 2006 Atmark Techno, Inc. | |
3 | * | |
4 | * This file is subject to the terms and conditions of the GNU General Public | |
5 | * License. See the file "COPYING" in the main directory of this archive | |
6 | * for more details. | |
7 | */ | |
8 | ||
9 | #ifndef _ASM_MICROBLAZE_THREAD_INFO_H | |
10 | #define _ASM_MICROBLAZE_THREAD_INFO_H | |
11 | ||
12 | #ifdef __KERNEL__ | |
13 | ||
14 | /* we have 8k stack */ | |
15 | #define THREAD_SHIFT 13 | |
16 | #define THREAD_SIZE (1 << THREAD_SHIFT) | |
17 | #define THREAD_SIZE_ORDER 1 | |
18 | ||
19 | #ifndef __ASSEMBLY__ | |
20 | # include <linux/types.h> | |
21 | # include <asm/processor.h> | |
22 | # include <asm/segment.h> | |
23 | ||
24 | /* | |
25 | * low level task data that entry.S needs immediate access to | |
26 | * - this struct should fit entirely inside of one cache line | |
27 | * - this struct shares the supervisor stack pages | |
28 | * - if the contents of this structure are changed, the assembly constants | |
29 | * must also be changed | |
30 | */ | |
31 | ||
32 | struct cpu_context { | |
33 | __u32 r1; /* stack pointer */ | |
34 | __u32 r2; | |
35 | /* dedicated registers */ | |
36 | __u32 r13; | |
37 | __u32 r14; | |
38 | __u32 r15; | |
39 | __u32 r16; | |
40 | __u32 r17; | |
41 | __u32 r18; | |
42 | /* non-volatile registers */ | |
43 | __u32 r19; | |
44 | __u32 r20; | |
45 | __u32 r21; | |
46 | __u32 r22; | |
47 | __u32 r23; | |
48 | __u32 r24; | |
49 | __u32 r25; | |
50 | __u32 r26; | |
51 | __u32 r27; | |
52 | __u32 r28; | |
53 | __u32 r29; | |
54 | __u32 r30; | |
55 | /* r31 is used as current task pointer */ | |
56 | /* special purpose registers */ | |
57 | __u32 msr; | |
58 | __u32 ear; | |
59 | __u32 esr; | |
60 | __u32 fsr; | |
61 | }; | |
62 | ||
63 | struct thread_info { | |
64 | struct task_struct *task; /* main task structure */ | |
65 | struct exec_domain *exec_domain; /* execution domain */ | |
66 | unsigned long flags; /* low level flags */ | |
67 | unsigned long status; /* thread-synchronous flags */ | |
68 | __u32 cpu; /* current CPU */ | |
69 | __s32 preempt_count; /* 0 => preemptable,< 0 => BUG*/ | |
70 | mm_segment_t addr_limit; /* thread address space */ | |
71 | struct restart_block restart_block; | |
72 | ||
73 | struct cpu_context cpu_context; | |
74 | }; | |
75 | ||
76 | /* | |
77 | * macros/functions for gaining access to the thread information structure | |
78 | * | |
79 | * preempt_count needs to be 1 initially, until the scheduler is functional. | |
80 | */ | |
81 | #define INIT_THREAD_INFO(tsk) \ | |
82 | { \ | |
83 | .task = &tsk, \ | |
84 | .exec_domain = &default_exec_domain, \ | |
85 | .flags = 0, \ | |
86 | .cpu = 0, \ | |
87 | .preempt_count = 1, \ | |
88 | .addr_limit = KERNEL_DS, \ | |
89 | .restart_block = { \ | |
90 | .fn = do_no_restart_syscall, \ | |
91 | }, \ | |
92 | } | |
93 | ||
94 | #define init_thread_info (init_thread_union.thread_info) | |
95 | #define init_stack (init_thread_union.stack) | |
96 | ||
97 | /* how to get the thread information struct from C */ | |
98 | static inline struct thread_info *current_thread_info(void) | |
99 | { | |
100 | register unsigned long sp asm("r1"); | |
101 | ||
102 | return (struct thread_info *)(sp & ~(THREAD_SIZE-1)); | |
103 | } | |
104 | ||
105 | /* thread information allocation */ | |
106 | #endif /* __ASSEMBLY__ */ | |
107 | ||
108 | #define PREEMPT_ACTIVE 0x10000000 | |
109 | ||
110 | /* | |
111 | * thread information flags | |
112 | * - these are process state flags that various assembly files may | |
113 | * need to access | |
114 | * - pending work-to-be-done flags are in LSW | |
115 | * - other flags in MSW | |
116 | */ | |
117 | #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ | |
118 | #define TIF_NOTIFY_RESUME 1 /* resumption notification requested */ | |
119 | #define TIF_SIGPENDING 2 /* signal pending */ | |
120 | #define TIF_NEED_RESCHED 3 /* rescheduling necessary */ | |
121 | /* restore singlestep on return to user mode */ | |
122 | #define TIF_SINGLESTEP 4 | |
123 | #define TIF_IRET 5 /* return with iret */ | |
124 | #define TIF_MEMDIE 6 | |
0945f98b EI |
125 | #define TIF_SYSCALL_AUDIT 9 /* syscall auditing active */ |
126 | #define TIF_SECCOMP 10 /* secure computing */ | |
4684dade MS |
127 | #define TIF_FREEZE 14 /* Freezing for suspend */ |
128 | ||
129 | /* FIXME change in entry.S */ | |
130 | #define TIF_KERNEL_TRACE 8 /* kernel trace active */ | |
131 | ||
132 | /* true if poll_idle() is polling TIF_NEED_RESCHED */ | |
133 | #define TIF_POLLING_NRFLAG 16 | |
134 | ||
135 | #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) | |
136 | #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME) | |
137 | #define _TIF_SIGPENDING (1<<TIF_SIGPENDING) | |
138 | #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) | |
139 | #define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP) | |
140 | #define _TIF_IRET (1<<TIF_IRET) | |
141 | #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) | |
142 | #define _TIF_FREEZE (1<<TIF_FREEZE) | |
0945f98b EI |
143 | #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) |
144 | #define _TIF_SECCOMP (1 << TIF_SECCOMP) | |
4684dade MS |
145 | #define _TIF_KERNEL_TRACE (1 << TIF_KERNEL_TRACE) |
146 | ||
0945f98b EI |
147 | /* work to do in syscall trace */ |
148 | #define _TIF_WORK_SYSCALL_MASK (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \ | |
149 | _TIF_SYSCALL_AUDIT | _TIF_SECCOMP) | |
150 | ||
4684dade MS |
151 | /* work to do on interrupt/exception return */ |
152 | #define _TIF_WORK_MASK 0x0000FFFE | |
0945f98b | 153 | |
4684dade MS |
154 | /* work to do on any return to u-space */ |
155 | #define _TIF_ALLWORK_MASK 0x0000FFFF | |
156 | ||
157 | /* | |
158 | * Thread-synchronous status. | |
159 | * | |
160 | * This is different from the flags in that nobody else | |
161 | * ever touches our thread-synchronous status, so we don't | |
162 | * have to worry about atomic accesses. | |
163 | */ | |
164 | /* FPU was used by this task this quantum (SMP) */ | |
165 | #define TS_USEDFPU 0x0001 | |
a6029d1c MS |
166 | #define TS_RESTORE_SIGMASK 0x0002 |
167 | ||
168 | #ifndef __ASSEMBLY__ | |
169 | #define HAVE_SET_RESTORE_SIGMASK 1 | |
170 | static inline void set_restore_sigmask(void) | |
171 | { | |
172 | struct thread_info *ti = current_thread_info(); | |
173 | ti->status |= TS_RESTORE_SIGMASK; | |
174 | set_bit(TIF_SIGPENDING, (unsigned long *)&ti->flags); | |
175 | } | |
176 | #endif | |
4684dade MS |
177 | |
178 | #endif /* __KERNEL__ */ | |
179 | #endif /* _ASM_MICROBLAZE_THREAD_INFO_H */ |