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[linux/fpc-iii.git] / arch / powerpc / include / asm / thread_info.h
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1 /* thread_info.h: PowerPC low-level thread information
2 * adapted from the i386 version by Paul Mackerras
4 * Copyright (C) 2002 David Howells (dhowells@redhat.com)
5 * - Incorporating suggestions made by Linus Torvalds and Dave Miller
6 */
8 #ifndef _ASM_POWERPC_THREAD_INFO_H
9 #define _ASM_POWERPC_THREAD_INFO_H
11 #ifdef __KERNEL__
13 #define THREAD_SHIFT CONFIG_THREAD_SHIFT
15 #define THREAD_SIZE (1 << THREAD_SHIFT)
17 #ifdef CONFIG_PPC64
18 #define CURRENT_THREAD_INFO(dest, sp) stringify_in_c(clrrdi dest, sp, THREAD_SHIFT)
19 #else
20 #define CURRENT_THREAD_INFO(dest, sp) stringify_in_c(rlwinm dest, sp, 0, 0, 31-THREAD_SHIFT)
21 #endif
23 #ifndef __ASSEMBLY__
24 #include <linux/cache.h>
25 #include <asm/processor.h>
26 #include <asm/page.h>
27 #include <linux/stringify.h>
28 #include <asm/accounting.h>
31 * low level task data.
33 struct thread_info {
34 struct task_struct *task; /* main task structure */
35 int cpu; /* cpu we're on */
36 int preempt_count; /* 0 => preemptable,
37 <0 => BUG */
38 unsigned long local_flags; /* private flags for thread */
39 #ifdef CONFIG_LIVEPATCH
40 unsigned long *livepatch_sp;
41 #endif
42 #if defined(CONFIG_VIRT_CPU_ACCOUNTING_NATIVE) && defined(CONFIG_PPC32)
43 struct cpu_accounting_data accounting;
44 #endif
45 /* low level flags - has atomic operations done on it */
46 unsigned long flags ____cacheline_aligned_in_smp;
50 * macros/functions for gaining access to the thread information structure
52 #define INIT_THREAD_INFO(tsk) \
53 { \
54 .task = &tsk, \
55 .cpu = 0, \
56 .preempt_count = INIT_PREEMPT_COUNT, \
57 .flags = 0, \
60 #define init_thread_info (init_thread_union.thread_info)
61 #define init_stack (init_thread_union.stack)
63 #define THREAD_SIZE_ORDER (THREAD_SHIFT - PAGE_SHIFT)
65 /* how to get the thread information struct from C */
66 static inline struct thread_info *current_thread_info(void)
68 unsigned long val;
70 asm (CURRENT_THREAD_INFO(%0,1) : "=r" (val));
72 return (struct thread_info *)val;
75 #endif /* __ASSEMBLY__ */
78 * thread information flag bit numbers
80 #define TIF_SYSCALL_TRACE 0 /* syscall trace active */
81 #define TIF_SIGPENDING 1 /* signal pending */
82 #define TIF_NEED_RESCHED 2 /* rescheduling necessary */
83 #define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
84 TIF_NEED_RESCHED */
85 #define TIF_32BIT 4 /* 32 bit binary */
86 #define TIF_RESTORE_TM 5 /* need to restore TM FP/VEC/VSX */
87 #define TIF_PATCH_PENDING 6 /* pending live patching update */
88 #define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */
89 #define TIF_SINGLESTEP 8 /* singlestepping active */
90 #define TIF_NOHZ 9 /* in adaptive nohz mode */
91 #define TIF_SECCOMP 10 /* secure computing */
92 #define TIF_RESTOREALL 11 /* Restore all regs (implies NOERROR) */
93 #define TIF_NOERROR 12 /* Force successful syscall return */
94 #define TIF_NOTIFY_RESUME 13 /* callback before returning to user */
95 #define TIF_UPROBE 14 /* breakpointed or single-stepping */
96 #define TIF_SYSCALL_TRACEPOINT 15 /* syscall tracepoint instrumentation */
97 #define TIF_EMULATE_STACK_STORE 16 /* Is an instruction emulation
98 for stack store? */
99 #define TIF_MEMDIE 17 /* is terminating due to OOM killer */
100 #if defined(CONFIG_PPC64)
101 #define TIF_ELF2ABI 18 /* function descriptors must die! */
102 #endif
104 /* as above, but as bit values */
105 #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
106 #define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
107 #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
108 #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
109 #define _TIF_32BIT (1<<TIF_32BIT)
110 #define _TIF_RESTORE_TM (1<<TIF_RESTORE_TM)
111 #define _TIF_PATCH_PENDING (1<<TIF_PATCH_PENDING)
112 #define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
113 #define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP)
114 #define _TIF_SECCOMP (1<<TIF_SECCOMP)
115 #define _TIF_RESTOREALL (1<<TIF_RESTOREALL)
116 #define _TIF_NOERROR (1<<TIF_NOERROR)
117 #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
118 #define _TIF_UPROBE (1<<TIF_UPROBE)
119 #define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT)
120 #define _TIF_EMULATE_STACK_STORE (1<<TIF_EMULATE_STACK_STORE)
121 #define _TIF_NOHZ (1<<TIF_NOHZ)
122 #define _TIF_SYSCALL_DOTRACE (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
123 _TIF_SECCOMP | _TIF_SYSCALL_TRACEPOINT | \
124 _TIF_NOHZ)
126 #define _TIF_USER_WORK_MASK (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \
127 _TIF_NOTIFY_RESUME | _TIF_UPROBE | \
128 _TIF_RESTORE_TM | _TIF_PATCH_PENDING)
129 #define _TIF_PERSYSCALL_MASK (_TIF_RESTOREALL|_TIF_NOERROR)
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 */
134 #define TLF_SLEEPING 1 /* suspend code enabled SLEEP mode */
135 #define TLF_LAZY_MMU 3 /* tlb_batch is active */
136 #define TLF_RUNLATCH 4 /* Is the runlatch enabled? */
138 #define _TLF_NAPPING (1 << TLF_NAPPING)
139 #define _TLF_SLEEPING (1 << TLF_SLEEPING)
140 #define _TLF_LAZY_MMU (1 << TLF_LAZY_MMU)
141 #define _TLF_RUNLATCH (1 << TLF_RUNLATCH)
143 #ifndef __ASSEMBLY__
145 static inline bool test_thread_local_flags(unsigned int flags)
147 struct thread_info *ti = current_thread_info();
148 return (ti->local_flags & flags) != 0;
151 #ifdef CONFIG_PPC64
152 #define is_32bit_task() (test_thread_flag(TIF_32BIT))
153 #else
154 #define is_32bit_task() (1)
155 #endif
157 #if defined(CONFIG_PPC64)
158 #define is_elf2_task() (test_thread_flag(TIF_ELF2ABI))
159 #else
160 #define is_elf2_task() (0)
161 #endif
163 #endif /* !__ASSEMBLY__ */
165 #endif /* __KERNEL__ */
167 #endif /* _ASM_POWERPC_THREAD_INFO_H */