powerpc: Turn on BPF_JIT in ppc64_defconfig
[linux-2.6-block.git] / arch / powerpc / include / asm / thread_info.h
CommitLineData
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 */
34struct 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
1da177e4
LT
49 */
50#define INIT_THREAD_INFO(tsk) \
51{ \
52 .task = &tsk, \
53 .exec_domain = &default_exec_domain, \
54 .cpu = 0, \
c99e6efe 55 .preempt_count = INIT_PREEMPT_COUNT, \
1da177e4
LT
56 .restart_block = { \
57 .fn = do_no_restart_syscall, \
58 }, \
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 */
68static inline struct thread_info *current_thread_info(void)
69{
6cb7bfeb
DG
70 register unsigned long sp asm("r1");
71
72 /* gcc4, at least, is smart enough to turn this into a single
73 * rlwinm for ppc32 and clrrdi for ppc64 */
74 return (struct thread_info *)(sp & ~(THREAD_SIZE-1));
1da177e4
LT
75}
76
77#endif /* __ASSEMBLY__ */
78
79#define PREEMPT_ACTIVE 0x10000000
80
81/*
82 * thread information flag bit numbers
83 */
84#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
a583f1b5
SE
85#define TIF_SIGPENDING 1 /* signal pending */
86#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
87#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
1da177e4 88 TIF_NEED_RESCHED */
a583f1b5
SE
89#define TIF_32BIT 4 /* 32 bit binary */
90#define TIF_PERFMON_WORK 5 /* work for pfm_handle_work() */
91#define TIF_PERFMON_CTXSW 6 /* perfmon needs ctxsw calls */
92#define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */
93#define TIF_SINGLESTEP 8 /* singlestepping active */
0ddc9324 94#define TIF_MEMDIE 9 /* is terminating due to OOM killer */
a583f1b5
SE
95#define TIF_SECCOMP 10 /* secure computing */
96#define TIF_RESTOREALL 11 /* Restore all regs (implies NOERROR) */
97#define TIF_NOERROR 12 /* Force successful syscall return */
7d6d637d 98#define TIF_NOTIFY_RESUME 13 /* callback before returning to user */
02424d89 99#define TIF_SYSCALL_TRACEPOINT 15 /* syscall tracepoint instrumentation */
1da177e4
LT
100
101/* as above, but as bit values */
102#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
1da177e4
LT
103#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
104#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
105#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
106#define _TIF_32BIT (1<<TIF_32BIT)
f341973d
AB
107#define _TIF_PERFMON_WORK (1<<TIF_PERFMON_WORK)
108#define _TIF_PERFMON_CTXSW (1<<TIF_PERFMON_CTXSW)
1da177e4
LT
109#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
110#define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP)
111#define _TIF_SECCOMP (1<<TIF_SECCOMP)
401d1f02 112#define _TIF_RESTOREALL (1<<TIF_RESTOREALL)
401d1f02 113#define _TIF_NOERROR (1<<TIF_NOERROR)
7d6d637d 114#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
02424d89 115#define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT)
02424d89
IM
116#define _TIF_SYSCALL_T_OR_A (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
117 _TIF_SECCOMP | _TIF_SYSCALL_TRACEPOINT)
1da177e4 118
7d6d637d
RM
119#define _TIF_USER_WORK_MASK (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \
120 _TIF_NOTIFY_RESUME)
1bd79336 121#define _TIF_PERSYSCALL_MASK (_TIF_RESTOREALL|_TIF_NOERROR)
1da177e4 122
f39224a8
PM
123/* Bits in local_flags */
124/* Don't move TLF_NAPPING without adjusting the code in entry_32.S */
125#define TLF_NAPPING 0 /* idle thread enabled NAP mode */
a560643e
PM
126#define TLF_SLEEPING 1 /* suspend code enabled SLEEP mode */
127#define TLF_RESTORE_SIGMASK 2 /* Restore signal mask in do_signal */
d6bf29b4 128#define TLF_LAZY_MMU 3 /* tlb_batch is active */
fe1952fc 129#define TLF_RUNLATCH 4 /* Is the runlatch enabled? */
f39224a8
PM
130
131#define _TLF_NAPPING (1 << TLF_NAPPING)
a560643e 132#define _TLF_SLEEPING (1 << TLF_SLEEPING)
7a10174e 133#define _TLF_RESTORE_SIGMASK (1 << TLF_RESTORE_SIGMASK)
d6bf29b4 134#define _TLF_LAZY_MMU (1 << TLF_LAZY_MMU)
fe1952fc 135#define _TLF_RUNLATCH (1 << TLF_RUNLATCH)
7a10174e
RM
136
137#ifndef __ASSEMBLY__
138#define HAVE_SET_RESTORE_SIGMASK 1
139static inline void set_restore_sigmask(void)
140{
141 struct thread_info *ti = current_thread_info();
142 ti->local_flags |= _TLF_RESTORE_SIGMASK;
edd63a27 143 WARN_ON(!test_bit(TIF_SIGPENDING, &ti->flags));
7a10174e 144}
4ebefe3e
AV
145static inline void clear_restore_sigmask(void)
146{
147 current_thread_info()->local_flags &= ~_TLF_RESTORE_SIGMASK;
148}
149static inline bool test_restore_sigmask(void)
150{
151 return current_thread_info()->local_flags & _TLF_RESTORE_SIGMASK;
152}
153static inline bool test_and_clear_restore_sigmask(void)
154{
155 struct thread_info *ti = current_thread_info();
156 if (!(ti->local_flags & _TLF_RESTORE_SIGMASK))
157 return false;
158 ti->local_flags &= ~_TLF_RESTORE_SIGMASK;
159 return true;
160}
a465f9b6 161
fe1952fc
BH
162static inline bool test_thread_local_flags(unsigned int flags)
163{
164 struct thread_info *ti = current_thread_info();
165 return (ti->local_flags & flags) != 0;
166}
167
a465f9b6
AB
168#ifdef CONFIG_PPC64
169#define is_32bit_task() (test_thread_flag(TIF_32BIT))
170#else
171#define is_32bit_task() (1)
172#endif
173
7a10174e 174#endif /* !__ASSEMBLY__ */
f39224a8 175
1da177e4
LT
176#endif /* __KERNEL__ */
177
6cb7bfeb 178#endif /* _ASM_POWERPC_THREAD_INFO_H */