Commit | Line | Data |
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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 | 18 | #ifdef CONFIG_PPC_BOOK3S_64 |
96d01610 | 19 | static inline void save_early_sprs(struct thread_struct *prev) |
c2d52644 MN |
20 | { |
21 | if (cpu_has_feature(CPU_FTR_ARCH_207S)) | |
22 | prev->tar = mfspr(SPRN_TAR); | |
96d01610 S |
23 | if (cpu_has_feature(CPU_FTR_DSCR)) |
24 | prev->dscr = mfspr(SPRN_DSCR); | |
c2d52644 MN |
25 | } |
26 | #else | |
96d01610 | 27 | static inline void save_early_sprs(struct thread_struct *prev) {} |
c2d52644 | 28 | #endif |
ae3a197e | 29 | |
ae3a197e | 30 | extern void enable_kernel_fp(void); |
ae3a197e | 31 | extern void enable_kernel_altivec(void); |
72cd7b44 | 32 | extern void enable_kernel_vsx(void); |
ae3a197e DH |
33 | extern int emulate_altivec(struct pt_regs *); |
34 | extern void __giveup_vsx(struct task_struct *); | |
35 | extern void giveup_vsx(struct task_struct *); | |
36 | extern void enable_kernel_spe(void); | |
37 | extern void giveup_spe(struct task_struct *); | |
38 | extern void load_up_spe(struct task_struct *); | |
f5f97210 | 39 | extern void switch_booke_debug_regs(struct debug_reg *new_debug); |
ae3a197e DH |
40 | |
41 | #ifndef CONFIG_SMP | |
42 | extern void discard_lazy_cpu_state(void); | |
43 | #else | |
44 | static inline void discard_lazy_cpu_state(void) | |
45 | { | |
46 | } | |
47 | #endif | |
48 | ||
037f0eed KH |
49 | #ifdef CONFIG_PPC_FPU |
50 | extern void flush_fp_to_thread(struct task_struct *); | |
5f20be44 | 51 | extern void giveup_fpu(struct task_struct *); |
037f0eed KH |
52 | #else |
53 | static inline void flush_fp_to_thread(struct task_struct *t) { } | |
5f20be44 | 54 | static inline void giveup_fpu(struct task_struct *t) { } |
037f0eed KH |
55 | #endif |
56 | ||
ae3a197e DH |
57 | #ifdef CONFIG_ALTIVEC |
58 | extern void flush_altivec_to_thread(struct task_struct *); | |
8cd3c23d | 59 | extern void giveup_altivec(struct task_struct *); |
35000870 | 60 | extern void giveup_altivec_notask(void); |
ae3a197e DH |
61 | #else |
62 | static inline void flush_altivec_to_thread(struct task_struct *t) | |
63 | { | |
64 | } | |
8cd3c23d AB |
65 | static inline void giveup_altivec(struct task_struct *t) |
66 | { | |
67 | } | |
ae3a197e DH |
68 | #endif |
69 | ||
70 | #ifdef CONFIG_VSX | |
71 | extern void flush_vsx_to_thread(struct task_struct *); | |
72 | #else | |
73 | static inline void flush_vsx_to_thread(struct task_struct *t) | |
74 | { | |
75 | } | |
76 | #endif | |
77 | ||
78 | #ifdef CONFIG_SPE | |
79 | extern void flush_spe_to_thread(struct task_struct *); | |
80 | #else | |
81 | static inline void flush_spe_to_thread(struct task_struct *t) | |
82 | { | |
83 | } | |
84 | #endif | |
85 | ||
330a1eb7 ME |
86 | static inline void clear_task_ebb(struct task_struct *t) |
87 | { | |
88 | #ifdef CONFIG_PPC_BOOK3S_64 | |
89 | /* EBB perf events are not inherited, so clear all EBB state. */ | |
3df48c98 ME |
90 | t->thread.ebbrr = 0; |
91 | t->thread.ebbhr = 0; | |
330a1eb7 ME |
92 | t->thread.bescr = 0; |
93 | t->thread.mmcr2 = 0; | |
94 | t->thread.mmcr0 = 0; | |
95 | t->thread.siar = 0; | |
96 | t->thread.sdar = 0; | |
97 | t->thread.sier = 0; | |
98 | t->thread.used_ebb = 0; | |
99 | #endif | |
100 | } | |
101 | ||
ae3a197e | 102 | #endif /* _ASM_POWERPC_SWITCH_TO_H */ |