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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> | |
c223c903 | 36 | #include <asm/accounting.h> |
1da177e4 LT |
37 | |
38 | /* | |
39 | * low level task data. | |
40 | */ | |
41 | struct thread_info { | |
42 | struct task_struct *task; /* main task structure */ | |
1da177e4 | 43 | int cpu; /* cpu we're on */ |
6cb7bfeb DG |
44 | int preempt_count; /* 0 => preemptable, |
45 | <0 => BUG */ | |
f39224a8 | 46 | unsigned long local_flags; /* private flags for thread */ |
5d31a96e ME |
47 | #ifdef CONFIG_LIVEPATCH |
48 | unsigned long *livepatch_sp; | |
c223c903 CL |
49 | #endif |
50 | #if defined(CONFIG_VIRT_CPU_ACCOUNTING_NATIVE) && defined(CONFIG_PPC32) | |
51 | struct cpu_accounting_data accounting; | |
5d31a96e | 52 | #endif |
1da177e4 LT |
53 | /* low level flags - has atomic operations done on it */ |
54 | unsigned long flags ____cacheline_aligned_in_smp; | |
55 | }; | |
56 | ||
57 | /* | |
58 | * macros/functions for gaining access to the thread information structure | |
1da177e4 LT |
59 | */ |
60 | #define INIT_THREAD_INFO(tsk) \ | |
61 | { \ | |
62 | .task = &tsk, \ | |
1da177e4 | 63 | .cpu = 0, \ |
c99e6efe | 64 | .preempt_count = INIT_PREEMPT_COUNT, \ |
1da177e4 LT |
65 | .flags = 0, \ |
66 | } | |
67 | ||
68 | #define init_thread_info (init_thread_union.thread_info) | |
69 | #define init_stack (init_thread_union.stack) | |
70 | ||
b69c49b7 | 71 | #define THREAD_SIZE_ORDER (THREAD_SHIFT - PAGE_SHIFT) |
328985b2 | 72 | |
1da177e4 LT |
73 | /* how to get the thread information struct from C */ |
74 | static inline struct thread_info *current_thread_info(void) | |
75 | { | |
a87e810f ME |
76 | unsigned long val; |
77 | ||
78 | asm (CURRENT_THREAD_INFO(%0,1) : "=r" (val)); | |
79 | ||
80 | return (struct thread_info *)val; | |
1da177e4 LT |
81 | } |
82 | ||
83 | #endif /* __ASSEMBLY__ */ | |
84 | ||
1da177e4 LT |
85 | /* |
86 | * thread information flag bit numbers | |
87 | */ | |
88 | #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ | |
a583f1b5 SE |
89 | #define TIF_SIGPENDING 1 /* signal pending */ |
90 | #define TIF_NEED_RESCHED 2 /* rescheduling necessary */ | |
91 | #define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling | |
1da177e4 | 92 | TIF_NEED_RESCHED */ |
a583f1b5 | 93 | #define TIF_32BIT 4 /* 32 bit binary */ |
d31626f7 | 94 | #define TIF_RESTORE_TM 5 /* need to restore TM FP/VEC/VSX */ |
a583f1b5 SE |
95 | #define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */ |
96 | #define TIF_SINGLESTEP 8 /* singlestepping active */ | |
22ecbe8d | 97 | #define TIF_NOHZ 9 /* in adaptive nohz mode */ |
a583f1b5 SE |
98 | #define TIF_SECCOMP 10 /* secure computing */ |
99 | #define TIF_RESTOREALL 11 /* Restore all regs (implies NOERROR) */ | |
100 | #define TIF_NOERROR 12 /* Force successful syscall return */ | |
7d6d637d | 101 | #define TIF_NOTIFY_RESUME 13 /* callback before returning to user */ |
8b7b80b9 | 102 | #define TIF_UPROBE 14 /* breakpointed or single-stepping */ |
02424d89 | 103 | #define TIF_SYSCALL_TRACEPOINT 15 /* syscall tracepoint instrumentation */ |
f0d1128f TC |
104 | #define TIF_EMULATE_STACK_STORE 16 /* Is an instruction emulation |
105 | for stack store? */ | |
22ecbe8d | 106 | #define TIF_MEMDIE 17 /* is terminating due to OOM killer */ |
373c76d6 RR |
107 | #if defined(CONFIG_PPC64) |
108 | #define TIF_ELF2ABI 18 /* function descriptors must die! */ | |
109 | #endif | |
1da177e4 LT |
110 | |
111 | /* as above, but as bit values */ | |
112 | #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) | |
1da177e4 LT |
113 | #define _TIF_SIGPENDING (1<<TIF_SIGPENDING) |
114 | #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) | |
115 | #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) | |
116 | #define _TIF_32BIT (1<<TIF_32BIT) | |
d31626f7 | 117 | #define _TIF_RESTORE_TM (1<<TIF_RESTORE_TM) |
1da177e4 LT |
118 | #define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT) |
119 | #define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP) | |
120 | #define _TIF_SECCOMP (1<<TIF_SECCOMP) | |
401d1f02 | 121 | #define _TIF_RESTOREALL (1<<TIF_RESTOREALL) |
401d1f02 | 122 | #define _TIF_NOERROR (1<<TIF_NOERROR) |
7d6d637d | 123 | #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME) |
8b7b80b9 | 124 | #define _TIF_UPROBE (1<<TIF_UPROBE) |
02424d89 | 125 | #define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT) |
f0d1128f | 126 | #define _TIF_EMULATE_STACK_STORE (1<<TIF_EMULATE_STACK_STORE) |
22ecbe8d | 127 | #define _TIF_NOHZ (1<<TIF_NOHZ) |
10ea8343 | 128 | #define _TIF_SYSCALL_DOTRACE (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \ |
22ecbe8d LZ |
129 | _TIF_SECCOMP | _TIF_SYSCALL_TRACEPOINT | \ |
130 | _TIF_NOHZ) | |
1da177e4 | 131 | |
7d6d637d | 132 | #define _TIF_USER_WORK_MASK (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \ |
d31626f7 PM |
133 | _TIF_NOTIFY_RESUME | _TIF_UPROBE | \ |
134 | _TIF_RESTORE_TM) | |
1bd79336 | 135 | #define _TIF_PERSYSCALL_MASK (_TIF_RESTOREALL|_TIF_NOERROR) |
1da177e4 | 136 | |
f39224a8 PM |
137 | /* Bits in local_flags */ |
138 | /* Don't move TLF_NAPPING without adjusting the code in entry_32.S */ | |
139 | #define TLF_NAPPING 0 /* idle thread enabled NAP mode */ | |
a560643e | 140 | #define TLF_SLEEPING 1 /* suspend code enabled SLEEP mode */ |
d6bf29b4 | 141 | #define TLF_LAZY_MMU 3 /* tlb_batch is active */ |
fe1952fc | 142 | #define TLF_RUNLATCH 4 /* Is the runlatch enabled? */ |
f39224a8 PM |
143 | |
144 | #define _TLF_NAPPING (1 << TLF_NAPPING) | |
a560643e | 145 | #define _TLF_SLEEPING (1 << TLF_SLEEPING) |
d6bf29b4 | 146 | #define _TLF_LAZY_MMU (1 << TLF_LAZY_MMU) |
fe1952fc | 147 | #define _TLF_RUNLATCH (1 << TLF_RUNLATCH) |
7a10174e RM |
148 | |
149 | #ifndef __ASSEMBLY__ | |
a465f9b6 | 150 | |
fe1952fc BH |
151 | static inline bool test_thread_local_flags(unsigned int flags) |
152 | { | |
153 | struct thread_info *ti = current_thread_info(); | |
154 | return (ti->local_flags & flags) != 0; | |
155 | } | |
156 | ||
a465f9b6 AB |
157 | #ifdef CONFIG_PPC64 |
158 | #define is_32bit_task() (test_thread_flag(TIF_32BIT)) | |
159 | #else | |
160 | #define is_32bit_task() (1) | |
161 | #endif | |
162 | ||
373c76d6 RR |
163 | #if defined(CONFIG_PPC64) |
164 | #define is_elf2_task() (test_thread_flag(TIF_ELF2ABI)) | |
165 | #else | |
166 | #define is_elf2_task() (0) | |
167 | #endif | |
168 | ||
7a10174e | 169 | #endif /* !__ASSEMBLY__ */ |
f39224a8 | 170 | |
1da177e4 LT |
171 | #endif /* __KERNEL__ */ |
172 | ||
6cb7bfeb | 173 | #endif /* _ASM_POWERPC_THREAD_INFO_H */ |