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review.shift-gmbh.com / SHIFTPHONES / kernel / common / 037f0eed57c3f35367ac32275e45f24e297549e9 / . / arch / powerpc / include / asm / switch_to.h
blob: 39cf0f6cc37396e19741cd3bd8b700e0689bb2e2 [file] [log] [blame]
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]1/*
2 * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
3 */
4#ifndef _ASM_POWERPC_SWITCH_TO_H
5#define _ASM_POWERPC_SWITCH_TO_H
6
7struct thread_struct;
8struct task_struct;
9struct pt_regs;
10
11extern struct task_struct *__switch_to(struct task_struct *,
12 struct task_struct *);
13#define switch_to(prev, next, last) ((last) = __switch_to((prev), (next)))
14
15struct thread_struct;
16extern struct task_struct *_switch(struct thread_struct *prev,
17 struct thread_struct *next);
18
19extern void giveup_fpu(struct task_struct *);
Scott Wood8fae8452011-12-20 15:34:45 +0000[diff] [blame]20extern void load_up_fpu(void);
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]21extern void enable_kernel_fp(void);
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]22extern void enable_kernel_altivec(void);
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]23extern void load_up_altivec(struct task_struct *);
24extern int emulate_altivec(struct pt_regs *);
25extern void __giveup_vsx(struct task_struct *);
26extern void giveup_vsx(struct task_struct *);
27extern void enable_kernel_spe(void);
28extern void giveup_spe(struct task_struct *);
29extern void load_up_spe(struct task_struct *);
30
31#ifndef CONFIG_SMP
32extern void discard_lazy_cpu_state(void);
33#else
34static inline void discard_lazy_cpu_state(void)
35{
36}
37#endif
38
Kevin Hao037f0ee2013-07-14 17:02:05 +0800[diff] [blame^]39#ifdef CONFIG_PPC_FPU
40extern void flush_fp_to_thread(struct task_struct *);
41#else
42static inline void flush_fp_to_thread(struct task_struct *t) { }
43#endif
44
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]45#ifdef CONFIG_ALTIVEC
46extern void flush_altivec_to_thread(struct task_struct *);
Anton Blanchard8cd3c232012-04-15 20:54:59 +0000[diff] [blame]47extern void giveup_altivec(struct task_struct *);
Anton Blanchard35000872012-04-15 20:56:45 +0000[diff] [blame]48extern void giveup_altivec_notask(void);
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]49#else
50static inline void flush_altivec_to_thread(struct task_struct *t)
51{
52}
Anton Blanchard8cd3c232012-04-15 20:54:59 +0000[diff] [blame]53static inline void giveup_altivec(struct task_struct *t)
54{
55}
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]56#endif
57
58#ifdef CONFIG_VSX
59extern void flush_vsx_to_thread(struct task_struct *);
60#else
61static inline void flush_vsx_to_thread(struct task_struct *t)
62{
63}
64#endif
65
66#ifdef CONFIG_SPE
67extern void flush_spe_to_thread(struct task_struct *);
68#else
69static inline void flush_spe_to_thread(struct task_struct *t)
70{
71}
72#endif
73
Michael Ellerman330a1eb2013-06-28 18:15:16 +1000[diff] [blame]74static inline void clear_task_ebb(struct task_struct *t)
75{
76#ifdef CONFIG_PPC_BOOK3S_64
77 /* EBB perf events are not inherited, so clear all EBB state. */
78 t->thread.bescr = 0;
79 t->thread.mmcr2 = 0;
80 t->thread.mmcr0 = 0;
81 t->thread.siar = 0;
82 t->thread.sdar = 0;
83 t->thread.sier = 0;
84 t->thread.used_ebb = 0;
85#endif
86}
87
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]88#endif /* _ASM_POWERPC_SWITCH_TO_H */