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review.shift-gmbh.com / SHIFTPHONES / kernel / common / b24413180f5600bcb3bb70fbed5cf186b60864bd / . / arch / powerpc / include / asm / switch_to.h
blob: bf820f53e27edda9c27b9963d0ae12140c925371 [file] [log] [blame]
Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +0100[diff] [blame^]1/* SPDX-License-Identifier: GPL-2.0 */
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]2/*
3 * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
4 */
5#ifndef _ASM_POWERPC_SWITCH_TO_H
6#define _ASM_POWERPC_SWITCH_TO_H
7
Anton Blanchard3eb5d582015-10-29 11:44:06 +1100[diff] [blame]8#include <asm/reg.h>
9
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]10struct thread_struct;
11struct task_struct;
12struct pt_regs;
13
14extern struct task_struct *__switch_to(struct task_struct *,
15 struct task_struct *);
16#define switch_to(prev, next, last) ((last) = __switch_to((prev), (next)))
17
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]18extern struct task_struct *_switch(struct thread_struct *prev,
19 struct thread_struct *next);
20
Scott Woodf5f97212013-11-22 15:52:29 -0600[diff] [blame]21extern void switch_booke_debug_regs(struct debug_reg *new_debug);
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]22
Anton Blanchardd1e1cf22015-10-29 11:44:11 +1100[diff] [blame]23extern int emulate_altivec(struct pt_regs *);
24
25extern void flush_all_to_thread(struct task_struct *);
26extern void giveup_all(struct task_struct *);
27
Kevin Hao037f0ee2013-07-14 17:02:05 +0800[diff] [blame]28#ifdef CONFIG_PPC_FPU
Anton Blanchardd1e1cf22015-10-29 11:44:11 +1100[diff] [blame]29extern void enable_kernel_fp(void);
Kevin Hao037f0ee2013-07-14 17:02:05 +0800[diff] [blame]30extern void flush_fp_to_thread(struct task_struct *);
Kevin Hao5f20be42013-07-14 17:02:06 +0800[diff] [blame]31extern void giveup_fpu(struct task_struct *);
Cyril Bur87924682016-02-29 17:53:49 +1100[diff] [blame]32extern void save_fpu(struct task_struct *);
Anton Blanchard3eb5d582015-10-29 11:44:06 +1100[diff] [blame]33static inline void disable_kernel_fp(void)
34{
35 msr_check_and_clear(MSR_FP);
36}
Kevin Hao037f0ee2013-07-14 17:02:05 +0800[diff] [blame]37#else
Cyril Burde2a20a2016-02-29 17:53:48 +1100[diff] [blame]38static inline void __giveup_fpu(struct task_struct *t) { }
Cyril Bur87924682016-02-29 17:53:49 +1100[diff] [blame]39static inline void save_fpu(struct task_struct *t) { }
Kevin Hao037f0ee2013-07-14 17:02:05 +0800[diff] [blame]40static inline void flush_fp_to_thread(struct task_struct *t) { }
41#endif
42
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]43#ifdef CONFIG_ALTIVEC
Anton Blanchardd1e1cf22015-10-29 11:44:11 +1100[diff] [blame]44extern void enable_kernel_altivec(void);
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]45extern void flush_altivec_to_thread(struct task_struct *);
Anton Blanchard8cd3c232012-04-15 20:54:59 +0000[diff] [blame]46extern void giveup_altivec(struct task_struct *);
Cyril Bur6f515d82016-02-29 17:53:50 +1100[diff] [blame]47extern void save_altivec(struct task_struct *);
Anton Blanchard3eb5d582015-10-29 11:44:06 +1100[diff] [blame]48static inline void disable_kernel_altivec(void)
49{
50 msr_check_and_clear(MSR_VEC);
51}
Cyril Burde2a20a2016-02-29 17:53:48 +1100[diff] [blame]52#else
Cyril Bur6f515d82016-02-29 17:53:50 +1100[diff] [blame]53static inline void save_altivec(struct task_struct *t) { }
Cyril Burde2a20a2016-02-29 17:53:48 +1100[diff] [blame]54static inline void __giveup_altivec(struct task_struct *t) { }
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]55#endif
56
57#ifdef CONFIG_VSX
Anton Blanchardd1e1cf22015-10-29 11:44:11 +1100[diff] [blame]58extern void enable_kernel_vsx(void);
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]59extern void flush_vsx_to_thread(struct task_struct *);
Anton Blanchard3eb5d582015-10-29 11:44:06 +1100[diff] [blame]60static inline void disable_kernel_vsx(void)
61{
62 msr_check_and_clear(MSR_FP|MSR_VEC|MSR_VSX);
63}
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]64#endif
65
66#ifdef CONFIG_SPE
Anton Blanchardd1e1cf22015-10-29 11:44:11 +1100[diff] [blame]67extern void enable_kernel_spe(void);
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]68extern void flush_spe_to_thread(struct task_struct *);
Anton Blanchard98da5812015-10-29 11:44:01 +1100[diff] [blame]69extern void giveup_spe(struct task_struct *);
70extern void __giveup_spe(struct task_struct *);
Anton Blanchard3eb5d582015-10-29 11:44:06 +1100[diff] [blame]71static inline void disable_kernel_spe(void)
72{
73 msr_check_and_clear(MSR_SPE);
74}
Cyril Burde2a20a2016-02-29 17:53:48 +1100[diff] [blame]75#else
76static inline void __giveup_spe(struct task_struct *t) { }
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]77#endif
78
Michael Ellerman330a1eb2013-06-28 18:15:16 +1000[diff] [blame]79static inline void clear_task_ebb(struct task_struct *t)
80{
81#ifdef CONFIG_PPC_BOOK3S_64
82 /* EBB perf events are not inherited, so clear all EBB state. */
Michael Ellerman3df48c92014-06-10 16:46:21 +1000[diff] [blame]83 t->thread.ebbrr = 0;
84 t->thread.ebbhr = 0;
Michael Ellerman330a1eb2013-06-28 18:15:16 +1000[diff] [blame]85 t->thread.bescr = 0;
86 t->thread.mmcr2 = 0;
87 t->thread.mmcr0 = 0;
88 t->thread.siar = 0;
89 t->thread.sdar = 0;
90 t->thread.sier = 0;
91 t->thread.used_ebb = 0;
92#endif
93}
94
David Howellsae3a1972012-03-28 18:30:02 +0100[diff] [blame]95#endif /* _ASM_POWERPC_SWITCH_TO_H */