Commit | Line | Data |
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6cb7bfeb | 1 | /* thread_info.h: PowerPC low-level thread information |
1da177e4 LT |
2 | * adapted from the i386 version by Paul Mackerras |
3 | * | |
4 | * Copyright (C) 2002 David Howells (dhowells@redhat.com) | |
5 | * - Incorporating suggestions made by Linus Torvalds and Dave Miller | |
6 | */ | |
7 | ||
6cb7bfeb DG |
8 | #ifndef _ASM_POWERPC_THREAD_INFO_H |
9 | #define _ASM_POWERPC_THREAD_INFO_H | |
1da177e4 LT |
10 | |
11 | #ifdef __KERNEL__ | |
12 | ||
6cb7bfeb DG |
13 | /* We have 8k stacks on ppc32 and 16k on ppc64 */ |
14 | ||
e1240122 | 15 | #if defined(CONFIG_PPC64) |
6cb7bfeb | 16 | #define THREAD_SHIFT 14 |
e1240122 YT |
17 | #elif defined(CONFIG_PPC_256K_PAGES) |
18 | #define THREAD_SHIFT 15 | |
6cb7bfeb DG |
19 | #else |
20 | #define THREAD_SHIFT 13 | |
21 | #endif | |
22 | ||
23 | #define THREAD_SIZE (1 << THREAD_SHIFT) | |
24 | ||
9778b696 | 25 | #ifdef CONFIG_PPC64 |
a87e810f | 26 | #define CURRENT_THREAD_INFO(dest, sp) stringify_in_c(clrrdi dest, sp, THREAD_SHIFT) |
9778b696 | 27 | #else |
a87e810f | 28 | #define CURRENT_THREAD_INFO(dest, sp) stringify_in_c(rlwinm dest, sp, 0, 0, 31-THREAD_SHIFT) |
9778b696 SY |
29 | #endif |
30 | ||
1da177e4 | 31 | #ifndef __ASSEMBLY__ |
1da177e4 LT |
32 | #include <linux/cache.h> |
33 | #include <asm/processor.h> | |
34 | #include <asm/page.h> | |
35 | #include <linux/stringify.h> | |
36 | ||
37 | /* | |
38 | * low level task data. | |
39 | */ | |
40 | struct thread_info { | |
41 | struct task_struct *task; /* main task structure */ | |
1da177e4 | 42 | int cpu; /* cpu we're on */ |
6cb7bfeb DG |
43 | int preempt_count; /* 0 => preemptable, |
44 | <0 => BUG */ | |
f39224a8 PM |
45 | unsigned long local_flags; /* private flags for thread */ |
46 | ||
1da177e4 LT |
47 | /* low level flags - has atomic operations done on it */ |
48 | unsigned long flags ____cacheline_aligned_in_smp; | |
49 | }; | |
50 | ||
51 | /* | |
52 | * macros/functions for gaining access to the thread information structure | |
1da177e4 LT |
53 | */ |
54 | #define INIT_THREAD_INFO(tsk) \ | |
55 | { \ | |
56 | .task = &tsk, \ | |
1da177e4 | 57 | .cpu = 0, \ |
c99e6efe | 58 | .preempt_count = INIT_PREEMPT_COUNT, \ |
1da177e4 LT |
59 | .flags = 0, \ |
60 | } | |
61 | ||
62 | #define init_thread_info (init_thread_union.thread_info) | |
63 | #define init_stack (init_thread_union.stack) | |
64 | ||
b69c49b7 | 65 | #define THREAD_SIZE_ORDER (THREAD_SHIFT - PAGE_SHIFT) |
328985b2 | 66 | |
1da177e4 LT |
67 | /* how to get the thread information struct from C */ |
68 | static inline struct thread_info *current_thread_info(void) | |
69 | { | |
a87e810f ME |
70 | unsigned long val; |
71 | ||
72 | asm (CURRENT_THREAD_INFO(%0,1) : "=r" (val)); | |
73 | ||
74 | return (struct thread_info *)val; | |
1da177e4 LT |
75 | } |
76 | ||
77 | #endif /* __ASSEMBLY__ */ | |
78 | ||
1da177e4 LT |
79 | /* |
80 | * thread information flag bit numbers | |
81 | */ | |
82 | #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ | |
a583f1b5 SE |
83 | #define TIF_SIGPENDING 1 /* signal pending */ |
84 | #define TIF_NEED_RESCHED 2 /* rescheduling necessary */ | |
85 | #define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling | |
1da177e4 | 86 | TIF_NEED_RESCHED */ |
a583f1b5 | 87 | #define TIF_32BIT 4 /* 32 bit binary */ |
d31626f7 | 88 | #define TIF_RESTORE_TM 5 /* need to restore TM FP/VEC/VSX */ |
a583f1b5 SE |
89 | #define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */ |
90 | #define TIF_SINGLESTEP 8 /* singlestepping active */ | |
22ecbe8d | 91 | #define TIF_NOHZ 9 /* in adaptive nohz mode */ |
a583f1b5 SE |
92 | #define TIF_SECCOMP 10 /* secure computing */ |
93 | #define TIF_RESTOREALL 11 /* Restore all regs (implies NOERROR) */ | |
94 | #define TIF_NOERROR 12 /* Force successful syscall return */ | |
7d6d637d | 95 | #define TIF_NOTIFY_RESUME 13 /* callback before returning to user */ |
8b7b80b9 | 96 | #define TIF_UPROBE 14 /* breakpointed or single-stepping */ |
02424d89 | 97 | #define TIF_SYSCALL_TRACEPOINT 15 /* syscall tracepoint instrumentation */ |
f0d1128f TC |
98 | #define TIF_EMULATE_STACK_STORE 16 /* Is an instruction emulation |
99 | for stack store? */ | |
22ecbe8d | 100 | #define TIF_MEMDIE 17 /* is terminating due to OOM killer */ |
373c76d6 RR |
101 | #if defined(CONFIG_PPC64) |
102 | #define TIF_ELF2ABI 18 /* function descriptors must die! */ | |
103 | #endif | |
1da177e4 LT |
104 | |
105 | /* as above, but as bit values */ | |
106 | #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) | |
1da177e4 LT |
107 | #define _TIF_SIGPENDING (1<<TIF_SIGPENDING) |
108 | #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) | |
109 | #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) | |
110 | #define _TIF_32BIT (1<<TIF_32BIT) | |
d31626f7 | 111 | #define _TIF_RESTORE_TM (1<<TIF_RESTORE_TM) |
1da177e4 LT |
112 | #define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT) |
113 | #define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP) | |
114 | #define _TIF_SECCOMP (1<<TIF_SECCOMP) | |
401d1f02 | 115 | #define _TIF_RESTOREALL (1<<TIF_RESTOREALL) |
401d1f02 | 116 | #define _TIF_NOERROR (1<<TIF_NOERROR) |
7d6d637d | 117 | #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME) |
8b7b80b9 | 118 | #define _TIF_UPROBE (1<<TIF_UPROBE) |
02424d89 | 119 | #define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT) |
f0d1128f | 120 | #define _TIF_EMULATE_STACK_STORE (1<<TIF_EMULATE_STACK_STORE) |
22ecbe8d | 121 | #define _TIF_NOHZ (1<<TIF_NOHZ) |
10ea8343 | 122 | #define _TIF_SYSCALL_DOTRACE (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \ |
22ecbe8d LZ |
123 | _TIF_SECCOMP | _TIF_SYSCALL_TRACEPOINT | \ |
124 | _TIF_NOHZ) | |
1da177e4 | 125 | |
7d6d637d | 126 | #define _TIF_USER_WORK_MASK (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \ |
d31626f7 PM |
127 | _TIF_NOTIFY_RESUME | _TIF_UPROBE | \ |
128 | _TIF_RESTORE_TM) | |
1bd79336 | 129 | #define _TIF_PERSYSCALL_MASK (_TIF_RESTOREALL|_TIF_NOERROR) |
1da177e4 | 130 | |
f39224a8 PM |
131 | /* Bits in local_flags */ |
132 | /* Don't move TLF_NAPPING without adjusting the code in entry_32.S */ | |
133 | #define TLF_NAPPING 0 /* idle thread enabled NAP mode */ | |
a560643e PM |
134 | #define TLF_SLEEPING 1 /* suspend code enabled SLEEP mode */ |
135 | #define TLF_RESTORE_SIGMASK 2 /* Restore signal mask in do_signal */ | |
d6bf29b4 | 136 | #define TLF_LAZY_MMU 3 /* tlb_batch is active */ |
fe1952fc | 137 | #define TLF_RUNLATCH 4 /* Is the runlatch enabled? */ |
f39224a8 PM |
138 | |
139 | #define _TLF_NAPPING (1 << TLF_NAPPING) | |
a560643e | 140 | #define _TLF_SLEEPING (1 << TLF_SLEEPING) |
7a10174e | 141 | #define _TLF_RESTORE_SIGMASK (1 << TLF_RESTORE_SIGMASK) |
d6bf29b4 | 142 | #define _TLF_LAZY_MMU (1 << TLF_LAZY_MMU) |
fe1952fc | 143 | #define _TLF_RUNLATCH (1 << TLF_RUNLATCH) |
7a10174e RM |
144 | |
145 | #ifndef __ASSEMBLY__ | |
146 | #define HAVE_SET_RESTORE_SIGMASK 1 | |
147 | static inline void set_restore_sigmask(void) | |
148 | { | |
149 | struct thread_info *ti = current_thread_info(); | |
150 | ti->local_flags |= _TLF_RESTORE_SIGMASK; | |
edd63a27 | 151 | WARN_ON(!test_bit(TIF_SIGPENDING, &ti->flags)); |
7a10174e | 152 | } |
4ebefe3e AV |
153 | static inline void clear_restore_sigmask(void) |
154 | { | |
155 | current_thread_info()->local_flags &= ~_TLF_RESTORE_SIGMASK; | |
156 | } | |
157 | static inline bool test_restore_sigmask(void) | |
158 | { | |
159 | return current_thread_info()->local_flags & _TLF_RESTORE_SIGMASK; | |
160 | } | |
161 | static inline bool test_and_clear_restore_sigmask(void) | |
162 | { | |
163 | struct thread_info *ti = current_thread_info(); | |
164 | if (!(ti->local_flags & _TLF_RESTORE_SIGMASK)) | |
165 | return false; | |
166 | ti->local_flags &= ~_TLF_RESTORE_SIGMASK; | |
167 | return true; | |
168 | } | |
a465f9b6 | 169 | |
fe1952fc BH |
170 | static inline bool test_thread_local_flags(unsigned int flags) |
171 | { | |
172 | struct thread_info *ti = current_thread_info(); | |
173 | return (ti->local_flags & flags) != 0; | |
174 | } | |
175 | ||
a465f9b6 AB |
176 | #ifdef CONFIG_PPC64 |
177 | #define is_32bit_task() (test_thread_flag(TIF_32BIT)) | |
178 | #else | |
179 | #define is_32bit_task() (1) | |
180 | #endif | |
181 | ||
373c76d6 RR |
182 | #if defined(CONFIG_PPC64) |
183 | #define is_elf2_task() (test_thread_flag(TIF_ELF2ABI)) | |
184 | #else | |
185 | #define is_elf2_task() (0) | |
186 | #endif | |
187 | ||
7a10174e | 188 | #endif /* !__ASSEMBLY__ */ |
f39224a8 | 189 | |
1da177e4 LT |
190 | #endif /* __KERNEL__ */ |
191 | ||
6cb7bfeb | 192 | #endif /* _ASM_POWERPC_THREAD_INFO_H */ |