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gerrit-public.fairphone.software / kernel / msm-5.4 / 70fe3d980f5f14d8125869125ba9a0ea95e09c6b / . / arch / powerpc / include / asm / switch_to.h
blob: 5b268b6be74c791cadfa2ea8575e298104bd529a [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
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]17extern struct task_struct *_switch(struct thread_struct *prev,
18 struct thread_struct *next);
19
Scott Woodf5f97212013-11-22 15:52:29 -0600[diff] [blame]20extern void switch_booke_debug_regs(struct debug_reg *new_debug);
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]21
Anton Blanchardd1e1cf22015-10-29 11:44:11 +1100[diff] [blame]22extern int emulate_altivec(struct pt_regs *);
23
24extern void flush_all_to_thread(struct task_struct *);
25extern void giveup_all(struct task_struct *);
26
Kevin Hao037f0ee2013-07-14 17:02:05 +0800[diff] [blame]27#ifdef CONFIG_PPC_FPU
Anton Blanchardd1e1cf22015-10-29 11:44:11 +1100[diff] [blame]28extern void enable_kernel_fp(void);
Kevin Hao037f0ee2013-07-14 17:02:05 +0800[diff] [blame]29extern void flush_fp_to_thread(struct task_struct *);
Kevin Hao5f20be42013-07-14 17:02:06 +0800[diff] [blame]30extern void giveup_fpu(struct task_struct *);
Anton Blanchard98da5812015-10-29 11:44:01 +1100[diff] [blame]31extern void __giveup_fpu(struct task_struct *);
Anton Blanchard3eb5d582015-10-29 11:44:06 +1100[diff] [blame]32static inline void disable_kernel_fp(void)
33{
34 msr_check_and_clear(MSR_FP);
35}
Kevin Hao037f0ee2013-07-14 17:02:05 +0800[diff] [blame]36#else
37static inline void flush_fp_to_thread(struct task_struct *t) { }
38#endif
39
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]40#ifdef CONFIG_ALTIVEC
Anton Blanchardd1e1cf22015-10-29 11:44:11 +1100[diff] [blame]41extern void enable_kernel_altivec(void);
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]42extern void flush_altivec_to_thread(struct task_struct *);
Anton Blanchard8cd3c232012-04-15 20:54:59 +0000[diff] [blame]43extern void giveup_altivec(struct task_struct *);
Anton Blanchard98da5812015-10-29 11:44:01 +1100[diff] [blame]44extern void __giveup_altivec(struct task_struct *);
Anton Blanchard3eb5d582015-10-29 11:44:06 +1100[diff] [blame]45static inline void disable_kernel_altivec(void)
46{
47 msr_check_and_clear(MSR_VEC);
48}
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]49#endif
50
51#ifdef CONFIG_VSX
Anton Blanchardd1e1cf22015-10-29 11:44:11 +1100[diff] [blame]52extern void enable_kernel_vsx(void);
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]53extern void flush_vsx_to_thread(struct task_struct *);
Anton Blanchardd1e1cf22015-10-29 11:44:11 +1100[diff] [blame]54extern void giveup_vsx(struct task_struct *);
55extern void __giveup_vsx(struct task_struct *);
Anton Blanchard3eb5d582015-10-29 11:44:06 +1100[diff] [blame]56static inline void disable_kernel_vsx(void)
57{
58 msr_check_and_clear(MSR_FP|MSR_VEC|MSR_VSX);
59}
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]60#endif
61
62#ifdef CONFIG_SPE
Anton Blanchardd1e1cf22015-10-29 11:44:11 +1100[diff] [blame]63extern void enable_kernel_spe(void);
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]64extern void flush_spe_to_thread(struct task_struct *);
Anton Blanchard98da5812015-10-29 11:44:01 +1100[diff] [blame]65extern void giveup_spe(struct task_struct *);
66extern void __giveup_spe(struct task_struct *);
Anton Blanchard3eb5d582015-10-29 11:44:06 +1100[diff] [blame]67static inline void disable_kernel_spe(void)
68{
69 msr_check_and_clear(MSR_SPE);
70}
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]71#endif
72
Michael Ellerman330a1eb2013-06-28 18:15:16 +1000[diff] [blame]73static inline void clear_task_ebb(struct task_struct *t)
74{
75#ifdef CONFIG_PPC_BOOK3S_64
76 /* EBB perf events are not inherited, so clear all EBB state. */
Michael Ellerman3df48c92014-06-10 16:46:21 +1000[diff] [blame]77 t->thread.ebbrr = 0;
78 t->thread.ebbhr = 0;
Michael Ellerman330a1eb2013-06-28 18:15:16 +1000[diff] [blame]79 t->thread.bescr = 0;
80 t->thread.mmcr2 = 0;
81 t->thread.mmcr0 = 0;
82 t->thread.siar = 0;
83 t->thread.sdar = 0;
84 t->thread.sier = 0;
85 t->thread.used_ebb = 0;
86#endif
87}
88
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]89#endif /* _ASM_POWERPC_SWITCH_TO_H */