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review.shift-gmbh.com / SHIFTPHONES / kernel / common / 3df48c981d5a9610e02e9270b1bc4274fb536710 / . / arch / powerpc / include / asm / switch_to.h
blob: 58abeda64cb7afa271078497f25e3ae5a8a0e26c [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);
Michael Neulingc2d52642013-08-09 17:29:30 +1000[diff] [blame]18#ifdef CONFIG_PPC_BOOK3S_64
Sam bobroff96d01612014-06-05 16:19:22 +1000[diff] [blame]19static inline void save_early_sprs(struct thread_struct *prev)
Michael Neulingc2d52642013-08-09 17:29:30 +1000[diff] [blame]20{
21 if (cpu_has_feature(CPU_FTR_ARCH_207S))
22 prev->tar = mfspr(SPRN_TAR);
Sam bobroff96d01612014-06-05 16:19:22 +1000[diff] [blame]23 if (cpu_has_feature(CPU_FTR_DSCR))
24 prev->dscr = mfspr(SPRN_DSCR);
Michael Neulingc2d52642013-08-09 17:29:30 +1000[diff] [blame]25}
26#else
Sam bobroff96d01612014-06-05 16:19:22 +1000[diff] [blame]27static inline void save_early_sprs(struct thread_struct *prev) {}
Michael Neulingc2d52642013-08-09 17:29:30 +1000[diff] [blame]28#endif
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]29
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]30extern void enable_kernel_fp(void);
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]31extern void enable_kernel_altivec(void);
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]32extern int emulate_altivec(struct pt_regs *);
33extern void __giveup_vsx(struct task_struct *);
34extern void giveup_vsx(struct task_struct *);
35extern void enable_kernel_spe(void);
36extern void giveup_spe(struct task_struct *);
37extern void load_up_spe(struct task_struct *);
Scott Woodf5f97212013-11-22 15:52:29 -0600[diff] [blame]38extern void switch_booke_debug_regs(struct debug_reg *new_debug);
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]39
40#ifndef CONFIG_SMP
41extern void discard_lazy_cpu_state(void);
42#else
43static inline void discard_lazy_cpu_state(void)
44{
45}
46#endif
47
Kevin Hao037f0ee2013-07-14 17:02:05 +0800[diff] [blame]48#ifdef CONFIG_PPC_FPU
49extern void flush_fp_to_thread(struct task_struct *);
Kevin Hao5f20be42013-07-14 17:02:06 +0800[diff] [blame]50extern void giveup_fpu(struct task_struct *);
Kevin Hao037f0ee2013-07-14 17:02:05 +0800[diff] [blame]51#else
52static inline void flush_fp_to_thread(struct task_struct *t) { }
Kevin Hao5f20be42013-07-14 17:02:06 +0800[diff] [blame]53static inline void giveup_fpu(struct task_struct *t) { }
Kevin Hao037f0ee2013-07-14 17:02:05 +0800[diff] [blame]54#endif
55
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]56#ifdef CONFIG_ALTIVEC
57extern void flush_altivec_to_thread(struct task_struct *);
Anton Blanchard8cd3c232012-04-15 20:54:59 +0000[diff] [blame]58extern void giveup_altivec(struct task_struct *);
Anton Blanchard35000872012-04-15 20:56:45 +0000[diff] [blame]59extern void giveup_altivec_notask(void);
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]60#else
61static inline void flush_altivec_to_thread(struct task_struct *t)
62{
63}
Anton Blanchard8cd3c232012-04-15 20:54:59 +0000[diff] [blame]64static inline void giveup_altivec(struct task_struct *t)
65{
66}
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]67#endif
68
69#ifdef CONFIG_VSX
70extern void flush_vsx_to_thread(struct task_struct *);
71#else
72static inline void flush_vsx_to_thread(struct task_struct *t)
73{
74}
75#endif
76
77#ifdef CONFIG_SPE
78extern void flush_spe_to_thread(struct task_struct *);
79#else
80static inline void flush_spe_to_thread(struct task_struct *t)
81{
82}
83#endif
84
Michael Ellerman330a1eb2013-06-28 18:15:16 +1000[diff] [blame]85static inline void clear_task_ebb(struct task_struct *t)
86{
87#ifdef CONFIG_PPC_BOOK3S_64
88 /* EBB perf events are not inherited, so clear all EBB state. */
Michael Ellerman3df48c92014-06-10 16:46:21 +1000[diff] [blame^]89 t->thread.ebbrr = 0;
90 t->thread.ebbhr = 0;
Michael Ellerman330a1eb2013-06-28 18:15:16 +1000[diff] [blame]91 t->thread.bescr = 0;
92 t->thread.mmcr2 = 0;
93 t->thread.mmcr0 = 0;
94 t->thread.siar = 0;
95 t->thread.sdar = 0;
96 t->thread.sier = 0;
97 t->thread.used_ebb = 0;
98#endif
99}
100
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]101#endif /* _ASM_POWERPC_SWITCH_TO_H */