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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 | ||
3eb5d588 AB |
7 | #include <asm/reg.h> |
8 | ||
ae3a197e DH |
9 | struct thread_struct; |
10 | struct task_struct; | |
11 | struct pt_regs; | |
12 | ||
13 | extern 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 | ||
17 | struct thread_struct; | |
18 | extern struct task_struct *_switch(struct thread_struct *prev, | |
19 | struct thread_struct *next); | |
20 | ||
ae3a197e | 21 | extern void enable_kernel_fp(void); |
ae3a197e | 22 | extern void enable_kernel_altivec(void); |
72cd7b44 | 23 | extern void enable_kernel_vsx(void); |
ae3a197e DH |
24 | extern int emulate_altivec(struct pt_regs *); |
25 | extern void __giveup_vsx(struct task_struct *); | |
26 | extern void giveup_vsx(struct task_struct *); | |
27 | extern void enable_kernel_spe(void); | |
ae3a197e | 28 | extern void load_up_spe(struct task_struct *); |
c2085059 | 29 | extern void giveup_all(struct task_struct *); |
f5f97210 | 30 | extern void switch_booke_debug_regs(struct debug_reg *new_debug); |
ae3a197e | 31 | |
037f0eed KH |
32 | #ifdef CONFIG_PPC_FPU |
33 | extern void flush_fp_to_thread(struct task_struct *); | |
5f20be44 | 34 | extern void giveup_fpu(struct task_struct *); |
98da581e | 35 | extern void __giveup_fpu(struct task_struct *); |
3eb5d588 AB |
36 | static inline void disable_kernel_fp(void) |
37 | { | |
38 | msr_check_and_clear(MSR_FP); | |
39 | } | |
40 | ||
037f0eed KH |
41 | #else |
42 | static inline void flush_fp_to_thread(struct task_struct *t) { } | |
5f20be44 | 43 | static inline void giveup_fpu(struct task_struct *t) { } |
98da581e | 44 | static inline void __giveup_fpu(struct task_struct *t) { } |
037f0eed KH |
45 | #endif |
46 | ||
ae3a197e DH |
47 | #ifdef CONFIG_ALTIVEC |
48 | extern void flush_altivec_to_thread(struct task_struct *); | |
8cd3c23d | 49 | extern void giveup_altivec(struct task_struct *); |
98da581e | 50 | extern void __giveup_altivec(struct task_struct *); |
3eb5d588 AB |
51 | static inline void disable_kernel_altivec(void) |
52 | { | |
53 | msr_check_and_clear(MSR_VEC); | |
54 | } | |
ae3a197e | 55 | #else |
98da581e AB |
56 | static inline void flush_altivec_to_thread(struct task_struct *t) { } |
57 | static inline void giveup_altivec(struct task_struct *t) { } | |
58 | static inline void __giveup_altivec(struct task_struct *t) { } | |
ae3a197e DH |
59 | #endif |
60 | ||
61 | #ifdef CONFIG_VSX | |
62 | extern void flush_vsx_to_thread(struct task_struct *); | |
3eb5d588 AB |
63 | static inline void disable_kernel_vsx(void) |
64 | { | |
65 | msr_check_and_clear(MSR_FP|MSR_VEC|MSR_VSX); | |
66 | } | |
ae3a197e DH |
67 | #else |
68 | static inline void flush_vsx_to_thread(struct task_struct *t) | |
69 | { | |
70 | } | |
71 | #endif | |
72 | ||
73 | #ifdef CONFIG_SPE | |
74 | extern void flush_spe_to_thread(struct task_struct *); | |
98da581e AB |
75 | extern void giveup_spe(struct task_struct *); |
76 | extern void __giveup_spe(struct task_struct *); | |
3eb5d588 AB |
77 | static inline void disable_kernel_spe(void) |
78 | { | |
79 | msr_check_and_clear(MSR_SPE); | |
80 | } | |
ae3a197e | 81 | #else |
98da581e AB |
82 | static inline void flush_spe_to_thread(struct task_struct *t) { } |
83 | static inline void giveup_spe(struct task_struct *t) { } | |
84 | static inline void __giveup_spe(struct task_struct *t) { } | |
ae3a197e DH |
85 | #endif |
86 | ||
330a1eb7 ME |
87 | static 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 */ |