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gerrit-public.fairphone.software / kernel / msm-5.4 / 72cd7b44bc99376b3f3c93cedcd052663fcdf705 / . / arch / powerpc / include / asm / switch_to.h
blob: 15cca17cba4b9fe47c5598006f9e61214e20295c [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);
Leonidas Da Silva Barbosa72cd7b42015-07-13 13:51:01 -0300[diff] [blame^]32extern void enable_kernel_vsx(void);
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]33extern int emulate_altivec(struct pt_regs *);
34extern void __giveup_vsx(struct task_struct *);
35extern void giveup_vsx(struct task_struct *);
36extern void enable_kernel_spe(void);
37extern void giveup_spe(struct task_struct *);
38extern void load_up_spe(struct task_struct *);
Scott Woodf5f97212013-11-22 15:52:29 -0600[diff] [blame]39extern void switch_booke_debug_regs(struct debug_reg *new_debug);
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]40
41#ifndef CONFIG_SMP
42extern void discard_lazy_cpu_state(void);
43#else
44static inline void discard_lazy_cpu_state(void)
45{
46}
47#endif
48
Kevin Hao037f0ee2013-07-14 17:02:05 +0800[diff] [blame]49#ifdef CONFIG_PPC_FPU
50extern void flush_fp_to_thread(struct task_struct *);
Kevin Hao5f20be42013-07-14 17:02:06 +0800[diff] [blame]51extern void giveup_fpu(struct task_struct *);
Kevin Hao037f0ee2013-07-14 17:02:05 +0800[diff] [blame]52#else
53static inline void flush_fp_to_thread(struct task_struct *t) { }
Kevin Hao5f20be42013-07-14 17:02:06 +0800[diff] [blame]54static inline void giveup_fpu(struct task_struct *t) { }
Kevin Hao037f0ee2013-07-14 17:02:05 +0800[diff] [blame]55#endif
56
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]57#ifdef CONFIG_ALTIVEC
58extern void flush_altivec_to_thread(struct task_struct *);
Anton Blanchard8cd3c232012-04-15 20:54:59 +0000[diff] [blame]59extern void giveup_altivec(struct task_struct *);
Anton Blanchard35000872012-04-15 20:56:45 +0000[diff] [blame]60extern void giveup_altivec_notask(void);
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]61#else
62static inline void flush_altivec_to_thread(struct task_struct *t)
63{
64}
Anton Blanchard8cd3c232012-04-15 20:54:59 +0000[diff] [blame]65static inline void giveup_altivec(struct task_struct *t)
66{
67}
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]68#endif
69
70#ifdef CONFIG_VSX
71extern void flush_vsx_to_thread(struct task_struct *);
72#else
73static inline void flush_vsx_to_thread(struct task_struct *t)
74{
75}
76#endif
77
78#ifdef CONFIG_SPE
79extern void flush_spe_to_thread(struct task_struct *);
80#else
81static inline void flush_spe_to_thread(struct task_struct *t)
82{
83}
84#endif
85
Michael Ellerman330a1eb2013-06-28 18:15:16 +1000[diff] [blame]86static inline void clear_task_ebb(struct task_struct *t)
87{
88#ifdef CONFIG_PPC_BOOK3S_64
89 /* EBB perf events are not inherited, so clear all EBB state. */
Michael Ellerman3df48c92014-06-10 16:46:21 +1000[diff] [blame]90 t->thread.ebbrr = 0;
91 t->thread.ebbhr = 0;
Michael Ellerman330a1eb2013-06-28 18:15:16 +1000[diff] [blame]92 t->thread.bescr = 0;
93 t->thread.mmcr2 = 0;
94 t->thread.mmcr0 = 0;
95 t->thread.siar = 0;
96 t->thread.sdar = 0;
97 t->thread.sier = 0;
98 t->thread.used_ebb = 0;
99#endif
100}
101
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]102#endif /* _ASM_POWERPC_SWITCH_TO_H */