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gerrit-public.fairphone.software / kernel / msm-5.4 / f3d885ccba8539f62e8be3ba29ecf91687120252 / . / arch / powerpc / include / asm / switch_to.h
blob: 81d46a433c03ef25f3b1897ca3376ff60325aff3 [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 *);
Anton Blanchardc2085052015-10-29 11:44:08 +1100[diff] [blame]29extern void giveup_all(struct task_struct *);
Anton Blanchard579e6332015-10-29 11:44:09 +1100[diff] [blame]30extern void flush_all_to_thread(struct task_struct *);
Scott Woodf5f97212013-11-22 15:52:29 -0600[diff] [blame]31extern void switch_booke_debug_regs(struct debug_reg *new_debug);
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]32
Kevin Hao037f0ee2013-07-14 17:02:05 +0800[diff] [blame]33#ifdef CONFIG_PPC_FPU
34extern void flush_fp_to_thread(struct task_struct *);
Kevin Hao5f20be42013-07-14 17:02:06 +0800[diff] [blame]35extern void giveup_fpu(struct task_struct *);
Anton Blanchard98da5812015-10-29 11:44:01 +1100[diff] [blame]36extern void __giveup_fpu(struct task_struct *);
Anton Blanchard3eb5d582015-10-29 11:44:06 +1100[diff] [blame]37static inline void disable_kernel_fp(void)
38{
39 msr_check_and_clear(MSR_FP);
40}
41
Kevin Hao037f0ee2013-07-14 17:02:05 +0800[diff] [blame]42#else
43static inline void flush_fp_to_thread(struct task_struct *t) { }
Kevin Hao5f20be42013-07-14 17:02:06 +0800[diff] [blame]44static inline void giveup_fpu(struct task_struct *t) { }
Anton Blanchard98da5812015-10-29 11:44:01 +1100[diff] [blame]45static inline void __giveup_fpu(struct task_struct *t) { }
Kevin Hao037f0ee2013-07-14 17:02:05 +0800[diff] [blame]46#endif
47
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]48#ifdef CONFIG_ALTIVEC
49extern void flush_altivec_to_thread(struct task_struct *);
Anton Blanchard8cd3c232012-04-15 20:54:59 +0000[diff] [blame]50extern void giveup_altivec(struct task_struct *);
Anton Blanchard98da5812015-10-29 11:44:01 +1100[diff] [blame]51extern void __giveup_altivec(struct task_struct *);
Anton Blanchard3eb5d582015-10-29 11:44:06 +1100[diff] [blame]52static inline void disable_kernel_altivec(void)
53{
54 msr_check_and_clear(MSR_VEC);
55}
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]56#else
Anton Blanchard98da5812015-10-29 11:44:01 +1100[diff] [blame]57static inline void flush_altivec_to_thread(struct task_struct *t) { }
58static inline void giveup_altivec(struct task_struct *t) { }
59static inline void __giveup_altivec(struct task_struct *t) { }
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]60#endif
61
62#ifdef CONFIG_VSX
63extern void flush_vsx_to_thread(struct task_struct *);
Anton Blanchard3eb5d582015-10-29 11:44:06 +1100[diff] [blame]64static inline void disable_kernel_vsx(void)
65{
66 msr_check_and_clear(MSR_FP|MSR_VEC|MSR_VSX);
67}
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]68#else
69static inline void flush_vsx_to_thread(struct task_struct *t)
70{
71}
72#endif
73
74#ifdef CONFIG_SPE
75extern void flush_spe_to_thread(struct task_struct *);
Anton Blanchard98da5812015-10-29 11:44:01 +1100[diff] [blame]76extern void giveup_spe(struct task_struct *);
77extern void __giveup_spe(struct task_struct *);
Anton Blanchard3eb5d582015-10-29 11:44:06 +1100[diff] [blame]78static inline void disable_kernel_spe(void)
79{
80 msr_check_and_clear(MSR_SPE);
81}
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]82#else
Anton Blanchard98da5812015-10-29 11:44:01 +1100[diff] [blame]83static inline void flush_spe_to_thread(struct task_struct *t) { }
84static inline void giveup_spe(struct task_struct *t) { }
85static inline void __giveup_spe(struct task_struct *t) { }
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]86#endif
87
Michael Ellerman330a1eb2013-06-28 18:15:16 +1000[diff] [blame]88static inline void clear_task_ebb(struct task_struct *t)
89{
90#ifdef CONFIG_PPC_BOOK3S_64
91 /* EBB perf events are not inherited, so clear all EBB state. */
Michael Ellerman3df48c92014-06-10 16:46:21 +1000[diff] [blame]92 t->thread.ebbrr = 0;
93 t->thread.ebbhr = 0;
Michael Ellerman330a1eb2013-06-28 18:15:16 +1000[diff] [blame]94 t->thread.bescr = 0;
95 t->thread.mmcr2 = 0;
96 t->thread.mmcr0 = 0;
97 t->thread.siar = 0;
98 t->thread.sdar = 0;
99 t->thread.sier = 0;
100 t->thread.used_ebb = 0;
101#endif
102}
103
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]104#endif /* _ASM_POWERPC_SWITCH_TO_H */