Gitiles
Code Review Sign In
gerrit-public.fairphone.software / kernel / msm-5.4 / de2a20aa7237b45d3c14a2505804a8daa95a8f53 / . / arch / powerpc / include / asm / switch_to.h
blob: 3690041c126a7850a4dc37ec0684b81e04fa2bd5 [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
Cyril Burde2a20a2016-02-29 17:53:48 +1100[diff] [blame^]37static inline void __giveup_fpu(struct task_struct *t) { }
Kevin Hao037f0ee2013-07-14 17:02:05 +0800[diff] [blame]38static inline void flush_fp_to_thread(struct task_struct *t) { }
39#endif
40
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]41#ifdef CONFIG_ALTIVEC
Anton Blanchardd1e1cf22015-10-29 11:44:11 +1100[diff] [blame]42extern void enable_kernel_altivec(void);
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]43extern void flush_altivec_to_thread(struct task_struct *);
Anton Blanchard8cd3c232012-04-15 20:54:59 +0000[diff] [blame]44extern void giveup_altivec(struct task_struct *);
Anton Blanchard98da5812015-10-29 11:44:01 +1100[diff] [blame]45extern void __giveup_altivec(struct task_struct *);
Anton Blanchard3eb5d582015-10-29 11:44:06 +1100[diff] [blame]46static inline void disable_kernel_altivec(void)
47{
48 msr_check_and_clear(MSR_VEC);
49}
Cyril Burde2a20a2016-02-29 17:53:48 +1100[diff] [blame^]50#else
51static inline void __giveup_altivec(struct task_struct *t) { }
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]52#endif
53
54#ifdef CONFIG_VSX
Anton Blanchardd1e1cf22015-10-29 11:44:11 +1100[diff] [blame]55extern void enable_kernel_vsx(void);
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]56extern void flush_vsx_to_thread(struct task_struct *);
Anton Blanchardd1e1cf22015-10-29 11:44:11 +1100[diff] [blame]57extern void giveup_vsx(struct task_struct *);
58extern void __giveup_vsx(struct task_struct *);
Anton Blanchard3eb5d582015-10-29 11:44:06 +1100[diff] [blame]59static inline void disable_kernel_vsx(void)
60{
61 msr_check_and_clear(MSR_FP|MSR_VEC|MSR_VSX);
62}
Cyril Burde2a20a2016-02-29 17:53:48 +1100[diff] [blame^]63#else
64static inline void __giveup_vsx(struct task_struct *t) { }
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]65#endif
66
67#ifdef CONFIG_SPE
Anton Blanchardd1e1cf22015-10-29 11:44:11 +1100[diff] [blame]68extern void enable_kernel_spe(void);
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]69extern void flush_spe_to_thread(struct task_struct *);
Anton Blanchard98da5812015-10-29 11:44:01 +1100[diff] [blame]70extern void giveup_spe(struct task_struct *);
71extern void __giveup_spe(struct task_struct *);
Anton Blanchard3eb5d582015-10-29 11:44:06 +1100[diff] [blame]72static inline void disable_kernel_spe(void)
73{
74 msr_check_and_clear(MSR_SPE);
75}
Cyril Burde2a20a2016-02-29 17:53:48 +1100[diff] [blame^]76#else
77static inline void __giveup_spe(struct task_struct *t) { }
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]78#endif
79
Michael Ellerman330a1eb2013-06-28 18:15:16 +1000[diff] [blame]80static inline void clear_task_ebb(struct task_struct *t)
81{
82#ifdef CONFIG_PPC_BOOK3S_64
83 /* EBB perf events are not inherited, so clear all EBB state. */
Michael Ellerman3df48c92014-06-10 16:46:21 +1000[diff] [blame]84 t->thread.ebbrr = 0;
85 t->thread.ebbhr = 0;
Michael Ellerman330a1eb2013-06-28 18:15:16 +1000[diff] [blame]86 t->thread.bescr = 0;
87 t->thread.mmcr2 = 0;
88 t->thread.mmcr0 = 0;
89 t->thread.siar = 0;
90 t->thread.sdar = 0;
91 t->thread.sier = 0;
92 t->thread.used_ebb = 0;
93#endif
94}
95
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]96#endif /* _ASM_POWERPC_SWITCH_TO_H */