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 | ||
1da177e4 | 25 | #ifndef __ASSEMBLY__ |
1da177e4 LT |
26 | #include <linux/cache.h> |
27 | #include <asm/processor.h> | |
28 | #include <asm/page.h> | |
29 | #include <linux/stringify.h> | |
30 | ||
31 | /* | |
32 | * low level task data. | |
33 | */ | |
34 | struct thread_info { | |
35 | struct task_struct *task; /* main task structure */ | |
36 | struct exec_domain *exec_domain; /* execution domain */ | |
37 | int cpu; /* cpu we're on */ | |
6cb7bfeb DG |
38 | int preempt_count; /* 0 => preemptable, |
39 | <0 => BUG */ | |
1da177e4 | 40 | struct restart_block restart_block; |
f39224a8 PM |
41 | unsigned long local_flags; /* private flags for thread */ |
42 | ||
1da177e4 LT |
43 | /* low level flags - has atomic operations done on it */ |
44 | unsigned long flags ____cacheline_aligned_in_smp; | |
45 | }; | |
46 | ||
47 | /* | |
48 | * macros/functions for gaining access to the thread information structure | |
49 | * | |
50 | * preempt_count needs to be 1 initially, until the scheduler is functional. | |
51 | */ | |
52 | #define INIT_THREAD_INFO(tsk) \ | |
53 | { \ | |
54 | .task = &tsk, \ | |
55 | .exec_domain = &default_exec_domain, \ | |
56 | .cpu = 0, \ | |
57 | .preempt_count = 1, \ | |
58 | .restart_block = { \ | |
59 | .fn = do_no_restart_syscall, \ | |
60 | }, \ | |
61 | .flags = 0, \ | |
62 | } | |
63 | ||
64 | #define init_thread_info (init_thread_union.thread_info) | |
65 | #define init_stack (init_thread_union.stack) | |
66 | ||
67 | /* thread information allocation */ | |
68 | ||
328985b2 DG |
69 | #if THREAD_SHIFT >= PAGE_SHIFT |
70 | ||
b69c49b7 | 71 | #define THREAD_SIZE_ORDER (THREAD_SHIFT - PAGE_SHIFT) |
328985b2 DG |
72 | |
73 | #else /* THREAD_SHIFT < PAGE_SHIFT */ | |
74 | ||
b69c49b7 FT |
75 | #define __HAVE_ARCH_THREAD_INFO_ALLOCATOR |
76 | ||
f6a61680 BH |
77 | extern struct thread_info *alloc_thread_info(struct task_struct *tsk); |
78 | extern void free_thread_info(struct thread_info *ti); | |
328985b2 DG |
79 | |
80 | #endif /* THREAD_SHIFT < PAGE_SHIFT */ | |
81 | ||
1da177e4 LT |
82 | /* how to get the thread information struct from C */ |
83 | static inline struct thread_info *current_thread_info(void) | |
84 | { | |
6cb7bfeb DG |
85 | register unsigned long sp asm("r1"); |
86 | ||
87 | /* gcc4, at least, is smart enough to turn this into a single | |
88 | * rlwinm for ppc32 and clrrdi for ppc64 */ | |
89 | return (struct thread_info *)(sp & ~(THREAD_SIZE-1)); | |
1da177e4 LT |
90 | } |
91 | ||
92 | #endif /* __ASSEMBLY__ */ | |
93 | ||
94 | #define PREEMPT_ACTIVE 0x10000000 | |
95 | ||
96 | /* | |
97 | * thread information flag bit numbers | |
98 | */ | |
99 | #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ | |
a583f1b5 SE |
100 | #define TIF_SIGPENDING 1 /* signal pending */ |
101 | #define TIF_NEED_RESCHED 2 /* rescheduling necessary */ | |
102 | #define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling | |
1da177e4 | 103 | TIF_NEED_RESCHED */ |
a583f1b5 SE |
104 | #define TIF_32BIT 4 /* 32 bit binary */ |
105 | #define TIF_PERFMON_WORK 5 /* work for pfm_handle_work() */ | |
106 | #define TIF_PERFMON_CTXSW 6 /* perfmon needs ctxsw calls */ | |
107 | #define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */ | |
108 | #define TIF_SINGLESTEP 8 /* singlestepping active */ | |
109 | #define TIF_MEMDIE 9 | |
110 | #define TIF_SECCOMP 10 /* secure computing */ | |
111 | #define TIF_RESTOREALL 11 /* Restore all regs (implies NOERROR) */ | |
112 | #define TIF_NOERROR 12 /* Force successful syscall return */ | |
7d6d637d | 113 | #define TIF_NOTIFY_RESUME 13 /* callback before returning to user */ |
a583f1b5 SE |
114 | #define TIF_FREEZE 14 /* Freezing for suspend */ |
115 | #define TIF_RUNLATCH 15 /* Is the runlatch enabled? */ | |
116 | #define TIF_ABI_PENDING 16 /* 32/64 bit switch needed */ | |
1da177e4 LT |
117 | |
118 | /* as above, but as bit values */ | |
119 | #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) | |
1da177e4 LT |
120 | #define _TIF_SIGPENDING (1<<TIF_SIGPENDING) |
121 | #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) | |
122 | #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) | |
123 | #define _TIF_32BIT (1<<TIF_32BIT) | |
f341973d AB |
124 | #define _TIF_PERFMON_WORK (1<<TIF_PERFMON_WORK) |
125 | #define _TIF_PERFMON_CTXSW (1<<TIF_PERFMON_CTXSW) | |
1da177e4 LT |
126 | #define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT) |
127 | #define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP) | |
128 | #define _TIF_SECCOMP (1<<TIF_SECCOMP) | |
401d1f02 | 129 | #define _TIF_RESTOREALL (1<<TIF_RESTOREALL) |
401d1f02 | 130 | #define _TIF_NOERROR (1<<TIF_NOERROR) |
7d6d637d | 131 | #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME) |
8a102eed | 132 | #define _TIF_FREEZE (1<<TIF_FREEZE) |
f341973d AB |
133 | #define _TIF_RUNLATCH (1<<TIF_RUNLATCH) |
134 | #define _TIF_ABI_PENDING (1<<TIF_ABI_PENDING) | |
1da177e4 LT |
135 | #define _TIF_SYSCALL_T_OR_A (_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP) |
136 | ||
7d6d637d RM |
137 | #define _TIF_USER_WORK_MASK (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \ |
138 | _TIF_NOTIFY_RESUME) | |
1bd79336 | 139 | #define _TIF_PERSYSCALL_MASK (_TIF_RESTOREALL|_TIF_NOERROR) |
1da177e4 | 140 | |
f39224a8 PM |
141 | /* Bits in local_flags */ |
142 | /* Don't move TLF_NAPPING without adjusting the code in entry_32.S */ | |
143 | #define TLF_NAPPING 0 /* idle thread enabled NAP mode */ | |
a560643e PM |
144 | #define TLF_SLEEPING 1 /* suspend code enabled SLEEP mode */ |
145 | #define TLF_RESTORE_SIGMASK 2 /* Restore signal mask in do_signal */ | |
f39224a8 PM |
146 | |
147 | #define _TLF_NAPPING (1 << TLF_NAPPING) | |
a560643e | 148 | #define _TLF_SLEEPING (1 << TLF_SLEEPING) |
7a10174e RM |
149 | #define _TLF_RESTORE_SIGMASK (1 << TLF_RESTORE_SIGMASK) |
150 | ||
151 | #ifndef __ASSEMBLY__ | |
152 | #define HAVE_SET_RESTORE_SIGMASK 1 | |
153 | static inline void set_restore_sigmask(void) | |
154 | { | |
155 | struct thread_info *ti = current_thread_info(); | |
156 | ti->local_flags |= _TLF_RESTORE_SIGMASK; | |
157 | set_bit(TIF_SIGPENDING, &ti->flags); | |
158 | } | |
159 | #endif /* !__ASSEMBLY__ */ | |
f39224a8 | 160 | |
1da177e4 LT |
161 | #endif /* __KERNEL__ */ |
162 | ||
6cb7bfeb | 163 | #endif /* _ASM_POWERPC_THREAD_INFO_H */ |