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gerrit-public.fairphone.software / kernel / msm-4.9 / 3eb5d5888dc68c9b187998ca4249b8b9fa481eeb / . / arch / powerpc / include / asm / switch_to.h
blob: 9414dcb180d6dd4bcf1cfbb809eccf3e89957088 [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
Anton Blanchard3eb5d582015-10-29 11:44:06 +1100[diff] [blame^]7#include <asm/reg.h>
8
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]9struct thread_struct;
10struct task_struct;
11struct pt_regs;
12
13extern struct task_struct *__switch_to(struct task_struct *,
14 struct task_struct *);
15#define switch_to(prev, next, last) ((last) = __switch_to((prev), (next)))
16
17struct thread_struct;
18extern struct task_struct *_switch(struct thread_struct *prev,
19 struct thread_struct *next);
20
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);
Leonidas Da Silva Barbosa72cd7b42015-07-13 13:51:01 -0300[diff] [blame]23extern void enable_kernel_vsx(void);
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]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);
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]28extern void load_up_spe(struct task_struct *);
Scott Woodf5f97212013-11-22 15:52:29 -0600[diff] [blame]29extern void switch_booke_debug_regs(struct debug_reg *new_debug);
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]30
Kevin Hao037f0ee2013-07-14 17:02:05 +0800[diff] [blame]31#ifdef CONFIG_PPC_FPU
32extern void flush_fp_to_thread(struct task_struct *);
Kevin Hao5f20be42013-07-14 17:02:06 +0800[diff] [blame]33extern void giveup_fpu(struct task_struct *);
Anton Blanchard98da5812015-10-29 11:44:01 +1100[diff] [blame]34extern void __giveup_fpu(struct task_struct *);
Anton Blanchard3eb5d582015-10-29 11:44:06 +1100[diff] [blame^]35static inline void disable_kernel_fp(void)
36{
37 msr_check_and_clear(MSR_FP);
38}
39
Kevin Hao037f0ee2013-07-14 17:02:05 +0800[diff] [blame]40#else
41static inline void flush_fp_to_thread(struct task_struct *t) { }
Kevin Hao5f20be42013-07-14 17:02:06 +0800[diff] [blame]42static inline void giveup_fpu(struct task_struct *t) { }
Anton Blanchard98da5812015-10-29 11:44:01 +1100[diff] [blame]43static inline void __giveup_fpu(struct task_struct *t) { }
Kevin Hao037f0ee2013-07-14 17:02:05 +0800[diff] [blame]44#endif
45
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]46#ifdef CONFIG_ALTIVEC
47extern void flush_altivec_to_thread(struct task_struct *);
Anton Blanchard8cd3c232012-04-15 20:54:59 +0000[diff] [blame]48extern void giveup_altivec(struct task_struct *);
Anton Blanchard98da5812015-10-29 11:44:01 +1100[diff] [blame]49extern void __giveup_altivec(struct task_struct *);
Anton Blanchard3eb5d582015-10-29 11:44:06 +1100[diff] [blame^]50static inline void disable_kernel_altivec(void)
51{
52 msr_check_and_clear(MSR_VEC);
53}
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]54#else
Anton Blanchard98da5812015-10-29 11:44:01 +1100[diff] [blame]55static inline void flush_altivec_to_thread(struct task_struct *t) { }
56static inline void giveup_altivec(struct task_struct *t) { }
57static inline void __giveup_altivec(struct task_struct *t) { }
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]58#endif
59
60#ifdef CONFIG_VSX
61extern void flush_vsx_to_thread(struct task_struct *);
Anton Blanchard3eb5d582015-10-29 11:44:06 +1100[diff] [blame^]62static inline void disable_kernel_vsx(void)
63{
64 msr_check_and_clear(MSR_FP|MSR_VEC|MSR_VSX);
65}
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]66#else
67static inline void flush_vsx_to_thread(struct task_struct *t)
68{
69}
70#endif
71
72#ifdef CONFIG_SPE
73extern void flush_spe_to_thread(struct task_struct *);
Anton Blanchard98da5812015-10-29 11:44:01 +1100[diff] [blame]74extern void giveup_spe(struct task_struct *);
75extern void __giveup_spe(struct task_struct *);
Anton Blanchard3eb5d582015-10-29 11:44:06 +1100[diff] [blame^]76static inline void disable_kernel_spe(void)
77{
78 msr_check_and_clear(MSR_SPE);
79}
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]80#else
Anton Blanchard98da5812015-10-29 11:44:01 +1100[diff] [blame]81static inline void flush_spe_to_thread(struct task_struct *t) { }
82static inline void giveup_spe(struct task_struct *t) { }
83static inline void __giveup_spe(struct task_struct *t) { }
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]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 */