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powerpc: create giveup_all()
[mirror_ubuntu-bionic-kernel.git] / arch / powerpc / include / asm / switch_to.h
CommitLineData
ae3a197e
DH		 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
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AB		 7#include <asm/reg.h>
8
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DH		 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
ae3a197e 21extern void enable_kernel_fp(void);
ae3a197e 22extern void enable_kernel_altivec(void);
72cd7b44 23extern void enable_kernel_vsx(void);
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DH		 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);
ae3a197e 28extern void load_up_spe(struct task_struct *);
c2085059 29extern void giveup_all(struct task_struct *);
f5f97210 30extern void switch_booke_debug_regs(struct debug_reg *new_debug);
ae3a197e 31
037f0eed
KH		 32#ifdef CONFIG_PPC_FPU
33extern void flush_fp_to_thread(struct task_struct *);
5f20be44 34extern void giveup_fpu(struct task_struct *);
98da581e 35extern void __giveup_fpu(struct task_struct *);
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AB		 36static inline void disable_kernel_fp(void)
37{
38 msr_check_and_clear(MSR_FP);
39}
40
037f0eed
KH		 41#else
42static inline void flush_fp_to_thread(struct task_struct *t) { }
5f20be44 43static inline void giveup_fpu(struct task_struct *t) { }
98da581e 44static inline void __giveup_fpu(struct task_struct *t) { }
037f0eed
KH		 45#endif
46
ae3a197e
DH		 47#ifdef CONFIG_ALTIVEC
48extern void flush_altivec_to_thread(struct task_struct *);
8cd3c23d 49extern void giveup_altivec(struct task_struct *);
98da581e 50extern void __giveup_altivec(struct task_struct *);
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AB		 51static inline void disable_kernel_altivec(void)
52{
53 msr_check_and_clear(MSR_VEC);
54}
ae3a197e 55#else
98da581e
AB		 56static inline void flush_altivec_to_thread(struct task_struct *t) { }
57static inline void giveup_altivec(struct task_struct *t) { }
58static inline void __giveup_altivec(struct task_struct *t) { }
ae3a197e
DH		 59#endif
60
61#ifdef CONFIG_VSX
62extern void flush_vsx_to_thread(struct task_struct *);
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AB		 63static inline void disable_kernel_vsx(void)
64{
65 msr_check_and_clear(MSR_FP|MSR_VEC|MSR_VSX);
66}
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DH		 67#else
68static inline void flush_vsx_to_thread(struct task_struct *t)
69{
70}
71#endif
72
73#ifdef CONFIG_SPE
74extern void flush_spe_to_thread(struct task_struct *);
98da581e
AB		 75extern void giveup_spe(struct task_struct *);
76extern void __giveup_spe(struct task_struct *);
3eb5d588
AB		 77static inline void disable_kernel_spe(void)
78{
79 msr_check_and_clear(MSR_SPE);
80}
ae3a197e 81#else
98da581e
AB		 82static inline void flush_spe_to_thread(struct task_struct *t) { }
83static inline void giveup_spe(struct task_struct *t) { }
84static inline void __giveup_spe(struct task_struct *t) { }
ae3a197e
DH		 85#endif
86
330a1eb7
ME		 87static inline void clear_task_ebb(struct task_struct *t)
88{
89#ifdef CONFIG_PPC_BOOK3S_64
90 /* EBB perf events are not inherited, so clear all EBB state. */
3df48c98
ME		 91 t->thread.ebbrr = 0;
92 t->thread.ebbhr = 0;
330a1eb7
ME		 93 t->thread.bescr = 0;
94 t->thread.mmcr2 = 0;
95 t->thread.mmcr0 = 0;
96 t->thread.siar = 0;
97 t->thread.sdar = 0;
98 t->thread.sier = 0;
99 t->thread.used_ebb = 0;
100#endif
101}
102
ae3a197e 103#endif /* _ASM_POWERPC_SWITCH_TO_H */
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