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review.shift-gmbh.com / SHIFTPHONES / mainline / linux / 4cea8776571b18db7485930cb422faa739580c8c / . / arch / powerpc / include / asm / switch_to.h
blob: 17c8380673a60637c61fec5772162bf0ae5523cb [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 Hao5f20be442013-07-14 17:02:06 +0800[diff] [blame]30extern void giveup_fpu(struct task_struct *);
Cyril Bur87924682016-02-29 17:53:49 +1100[diff] [blame]31extern void save_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) { }
Cyril Bur87924682016-02-29 17:53:49 +1100[diff] [blame]38static inline void save_fpu(struct task_struct *t) { }
Kevin Hao037f0ee2013-07-14 17:02:05 +0800[diff] [blame]39static inline void flush_fp_to_thread(struct task_struct *t) { }
40#endif
41
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]42#ifdef CONFIG_ALTIVEC
Anton Blanchardd1e1cf22015-10-29 11:44:11 +1100[diff] [blame]43extern void enable_kernel_altivec(void);
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]44extern void flush_altivec_to_thread(struct task_struct *);
Anton Blanchard8cd3c232012-04-15 20:54:59 +0000[diff] [blame]45extern void giveup_altivec(struct task_struct *);
Cyril Bur6f515d82016-02-29 17:53:50 +1100[diff] [blame]46extern void save_altivec(struct task_struct *);
Anton Blanchard3eb5d582015-10-29 11:44:06 +1100[diff] [blame]47static inline void disable_kernel_altivec(void)
48{
49 msr_check_and_clear(MSR_VEC);
50}
Cyril Burde2a20a2016-02-29 17:53:48 +1100[diff] [blame]51#else
Cyril Bur6f515d82016-02-29 17:53:50 +1100[diff] [blame]52static inline void save_altivec(struct task_struct *t) { }
Cyril Burde2a20a2016-02-29 17:53:48 +1100[diff] [blame]53static inline void __giveup_altivec(struct task_struct *t) { }
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]54#endif
55
56#ifdef CONFIG_VSX
Anton Blanchardd1e1cf22015-10-29 11:44:11 +1100[diff] [blame]57extern void enable_kernel_vsx(void);
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]58extern void flush_vsx_to_thread(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}
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]63#endif
64
65#ifdef CONFIG_SPE
Anton Blanchardd1e1cf22015-10-29 11:44:11 +1100[diff] [blame]66extern void enable_kernel_spe(void);
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]67extern void flush_spe_to_thread(struct task_struct *);
Anton Blanchard98da5812015-10-29 11:44:01 +1100[diff] [blame]68extern void giveup_spe(struct task_struct *);
69extern void __giveup_spe(struct task_struct *);
Anton Blanchard3eb5d582015-10-29 11:44:06 +1100[diff] [blame]70static inline void disable_kernel_spe(void)
71{
72 msr_check_and_clear(MSR_SPE);
73}
Cyril Burde2a20a2016-02-29 17:53:48 +1100[diff] [blame]74#else
75static inline void __giveup_spe(struct task_struct *t) { }
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]76#endif
77
Michael Ellerman330a1eb2013-06-28 18:15:16 +1000[diff] [blame]78static inline void clear_task_ebb(struct task_struct *t)
79{
80#ifdef CONFIG_PPC_BOOK3S_64
81 /* EBB perf events are not inherited, so clear all EBB state. */
Michael Ellerman3df48c92014-06-10 16:46:21 +1000[diff] [blame]82 t->thread.ebbrr = 0;
83 t->thread.ebbhr = 0;
Michael Ellerman330a1eb2013-06-28 18:15:16 +1000[diff] [blame]84 t->thread.bescr = 0;
85 t->thread.mmcr2 = 0;
86 t->thread.mmcr0 = 0;
87 t->thread.siar = 0;
88 t->thread.sdar = 0;
89 t->thread.sier = 0;
90 t->thread.used_ebb = 0;
91#endif
92}
93
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]94#endif /* _ASM_POWERPC_SWITCH_TO_H */