projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| ae3a197e DH |
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 | ||
| 3eb5d588 AB |
8 | #include <asm/reg.h> |
| 9 | ||
| ae3a197e DH |
10 | struct thread_struct; |
| 11 | struct task_struct; | |
| 12 | struct pt_regs; | |
| 13 | ||
| 14 | extern 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 | ||
| ae3a197e DH |
18 | extern struct task_struct *_switch(struct thread_struct *prev, |
| 19 | struct thread_struct *next); | |
| 20 | ||
| d1e1cf2e AB |
21 | extern void switch_booke_debug_regs(struct debug_reg *new_debug); |
| 22 | ||
| ae3a197e | 23 | extern int emulate_altivec(struct pt_regs *); |
| d1e1cf2e | 24 | |
| 579e633e | 25 | extern void flush_all_to_thread(struct task_struct *); |
| d1e1cf2e | 26 | extern void giveup_all(struct task_struct *); |
| ae3a197e | 27 | |
| 037f0eed | 28 | #ifdef CONFIG_PPC_FPU |
| d1e1cf2e | 29 | extern void enable_kernel_fp(void); |
| 037f0eed | 30 | extern void flush_fp_to_thread(struct task_struct *); |
| 5f20be44 | 31 | extern void giveup_fpu(struct task_struct *); |
| 8792468d | 32 | extern void save_fpu(struct task_struct *); |
| 3eb5d588 AB |
33 | static inline void disable_kernel_fp(void) |
| 34 | { | |
| 35 | msr_check_and_clear(MSR_FP); | |
| 36 | } | |
| 037f0eed | 37 | #else |
| de2a20aa | 38 | static inline void __giveup_fpu(struct task_struct *t) { } |
| 8792468d | 39 | static inline void save_fpu(struct task_struct *t) { } |
| 037f0eed KH |
40 | static inline void flush_fp_to_thread(struct task_struct *t) { } |
| 41 | #endif | |
| 42 | ||
| ae3a197e | 43 | #ifdef CONFIG_ALTIVEC |
| d1e1cf2e | 44 | extern void enable_kernel_altivec(void); |
| ae3a197e | 45 | extern void flush_altivec_to_thread(struct task_struct *); |
| 8cd3c23d | 46 | extern void giveup_altivec(struct task_struct *); |
| 6f515d84 | 47 | extern void save_altivec(struct task_struct *); |
| 3eb5d588 AB |
48 | static inline void disable_kernel_altivec(void) |
| 49 | { | |
| 50 | msr_check_and_clear(MSR_VEC); | |
| 51 | } | |
| de2a20aa | 52 | #else |
| 6f515d84 | 53 | static inline void save_altivec(struct task_struct *t) { } |
| de2a20aa | 54 | static inline void __giveup_altivec(struct task_struct *t) { } |
| ae3a197e DH |
55 | #endif |
| 56 | ||
| 57 | #ifdef CONFIG_VSX | |
| d1e1cf2e | 58 | extern void enable_kernel_vsx(void); |
| ae3a197e | 59 | extern void flush_vsx_to_thread(struct task_struct *); |
| 3eb5d588 AB |
60 | static inline void disable_kernel_vsx(void) |
| 61 | { | |
| 62 | msr_check_and_clear(MSR_FP|MSR_VEC|MSR_VSX); | |
| 63 | } | |
| ae3a197e DH |
64 | #endif |
| 65 | ||
| 66 | #ifdef CONFIG_SPE | |
| d1e1cf2e | 67 | extern void enable_kernel_spe(void); |
| ae3a197e | 68 | extern void flush_spe_to_thread(struct task_struct *); |
| 98da581e AB |
69 | extern void giveup_spe(struct task_struct *); |
| 70 | extern void __giveup_spe(struct task_struct *); | |
| 3eb5d588 AB |
71 | static inline void disable_kernel_spe(void) |
| 72 | { | |
| 73 | msr_check_and_clear(MSR_SPE); | |
| 74 | } | |
| de2a20aa CB |
75 | #else |
| 76 | static inline void __giveup_spe(struct task_struct *t) { } | |
| ae3a197e DH |
77 | #endif |
| 78 | ||
| 330a1eb7 ME |
79 | static 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. */ | |
| 3df48c98 ME |
83 | t->thread.ebbrr = 0; |
| 84 | t->thread.ebbhr = 0; | |
| 330a1eb7 ME |
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 | ||
| ae3a197e | 95 | #endif /* _ASM_POWERPC_SWITCH_TO_H */ |