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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 | ||
7 | struct thread_struct; | |
8 | struct task_struct; | |
9 | struct pt_regs; | |
10 | ||
11 | extern struct task_struct *__switch_to(struct task_struct *, | |
12 | struct task_struct *); | |
13 | #define switch_to(prev, next, last) ((last) = __switch_to((prev), (next))) | |
14 | ||
15 | struct thread_struct; | |
16 | extern struct task_struct *_switch(struct thread_struct *prev, | |
17 | struct thread_struct *next); | |
c2d52644 MN |
18 | #ifdef CONFIG_PPC_BOOK3S_64 |
19 | static inline void save_tar(struct thread_struct *prev) | |
20 | { | |
21 | if (cpu_has_feature(CPU_FTR_ARCH_207S)) | |
22 | prev->tar = mfspr(SPRN_TAR); | |
23 | } | |
24 | #else | |
25 | static inline void save_tar(struct thread_struct *prev) {} | |
26 | #endif | |
ae3a197e | 27 | |
8fae845f | 28 | extern void load_up_fpu(void); |
ae3a197e | 29 | extern void enable_kernel_fp(void); |
ae3a197e | 30 | extern void enable_kernel_altivec(void); |
ae3a197e DH |
31 | extern void load_up_altivec(struct task_struct *); |
32 | extern int emulate_altivec(struct pt_regs *); | |
33 | extern void __giveup_vsx(struct task_struct *); | |
34 | extern void giveup_vsx(struct task_struct *); | |
35 | extern void enable_kernel_spe(void); | |
36 | extern void giveup_spe(struct task_struct *); | |
37 | extern void load_up_spe(struct task_struct *); | |
f5f97210 | 38 | extern void switch_booke_debug_regs(struct debug_reg *new_debug); |
ae3a197e DH |
39 | |
40 | #ifndef CONFIG_SMP | |
41 | extern void discard_lazy_cpu_state(void); | |
42 | #else | |
43 | static inline void discard_lazy_cpu_state(void) | |
44 | { | |
45 | } | |
46 | #endif | |
47 | ||
037f0eed KH |
48 | #ifdef CONFIG_PPC_FPU |
49 | extern void flush_fp_to_thread(struct task_struct *); | |
5f20be44 | 50 | extern void giveup_fpu(struct task_struct *); |
037f0eed KH |
51 | #else |
52 | static inline void flush_fp_to_thread(struct task_struct *t) { } | |
5f20be44 | 53 | static inline void giveup_fpu(struct task_struct *t) { } |
037f0eed KH |
54 | #endif |
55 | ||
ae3a197e DH |
56 | #ifdef CONFIG_ALTIVEC |
57 | extern void flush_altivec_to_thread(struct task_struct *); | |
8cd3c23d | 58 | extern void giveup_altivec(struct task_struct *); |
35000870 | 59 | extern void giveup_altivec_notask(void); |
ae3a197e DH |
60 | #else |
61 | static inline void flush_altivec_to_thread(struct task_struct *t) | |
62 | { | |
63 | } | |
8cd3c23d AB |
64 | static inline void giveup_altivec(struct task_struct *t) |
65 | { | |
66 | } | |
ae3a197e DH |
67 | #endif |
68 | ||
69 | #ifdef CONFIG_VSX | |
70 | extern void flush_vsx_to_thread(struct task_struct *); | |
71 | #else | |
72 | static inline void flush_vsx_to_thread(struct task_struct *t) | |
73 | { | |
74 | } | |
75 | #endif | |
76 | ||
77 | #ifdef CONFIG_SPE | |
78 | extern void flush_spe_to_thread(struct task_struct *); | |
79 | #else | |
80 | static inline void flush_spe_to_thread(struct task_struct *t) | |
81 | { | |
82 | } | |
83 | #endif | |
84 | ||
330a1eb7 ME |
85 | static inline void clear_task_ebb(struct task_struct *t) |
86 | { | |
87 | #ifdef CONFIG_PPC_BOOK3S_64 | |
88 | /* EBB perf events are not inherited, so clear all EBB state. */ | |
89 | t->thread.bescr = 0; | |
90 | t->thread.mmcr2 = 0; | |
91 | t->thread.mmcr0 = 0; | |
92 | t->thread.siar = 0; | |
93 | t->thread.sdar = 0; | |
94 | t->thread.sier = 0; | |
95 | t->thread.used_ebb = 0; | |
96 | #endif | |
97 | } | |
98 | ||
ae3a197e | 99 | #endif /* _ASM_POWERPC_SWITCH_TO_H */ |