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 | ||
| 68b34588 | 8 | #include <linux/sched.h> |
| 3eb5d588 AB |
9 | #include <asm/reg.h> |
| 10 | ||
| ae3a197e DH |
11 | struct thread_struct; |
| 12 | struct task_struct; | |
| 13 | struct pt_regs; | |
| 14 | ||
| 15 | extern struct task_struct *__switch_to(struct task_struct *, | |
| 16 | struct task_struct *); | |
| 17 | #define switch_to(prev, next, last) ((last) = __switch_to((prev), (next))) | |
| 18 | ||
| ae3a197e DH |
19 | extern struct task_struct *_switch(struct thread_struct *prev, |
| 20 | struct thread_struct *next); | |
| 21 | ||
| d1e1cf2e AB |
22 | extern void switch_booke_debug_regs(struct debug_reg *new_debug); |
| 23 | ||
| ae3a197e | 24 | extern int emulate_altivec(struct pt_regs *); |
| d1e1cf2e | 25 | |
| 6cc0c16d | 26 | #ifdef CONFIG_PPC_BOOK3S_64 |
| 68b34588 | 27 | void restore_math(struct pt_regs *regs); |
| 6cc0c16d NP |
28 | #else |
| 29 | static inline void restore_math(struct pt_regs *regs) | |
| 30 | { | |
| 31 | } | |
| 32 | #endif | |
| 68b34588 NP |
33 | |
| 34 | void restore_tm_state(struct pt_regs *regs); | |
| 35 | ||
| 579e633e | 36 | extern void flush_all_to_thread(struct task_struct *); |
| d1e1cf2e | 37 | extern void giveup_all(struct task_struct *); |
| ae3a197e | 38 | |
| 037f0eed | 39 | #ifdef CONFIG_PPC_FPU |
| d1e1cf2e | 40 | extern void enable_kernel_fp(void); |
| 037f0eed | 41 | extern void flush_fp_to_thread(struct task_struct *); |
| 5f20be44 | 42 | extern void giveup_fpu(struct task_struct *); |
| 8792468d | 43 | extern void save_fpu(struct task_struct *); |
| 3eb5d588 AB |
44 | static inline void disable_kernel_fp(void) |
| 45 | { | |
| 46 | msr_check_and_clear(MSR_FP); | |
| 47 | } | |
| 037f0eed | 48 | #else |
| 8792468d | 49 | static inline void save_fpu(struct task_struct *t) { } |
| 037f0eed KH |
50 | static inline void flush_fp_to_thread(struct task_struct *t) { } |
| 51 | #endif | |
| 52 | ||
| ae3a197e | 53 | #ifdef CONFIG_ALTIVEC |
| d1e1cf2e | 54 | extern void enable_kernel_altivec(void); |
| ae3a197e | 55 | extern void flush_altivec_to_thread(struct task_struct *); |
| 8cd3c23d | 56 | extern void giveup_altivec(struct task_struct *); |
| 6f515d84 | 57 | extern void save_altivec(struct task_struct *); |
| 3eb5d588 AB |
58 | static inline void disable_kernel_altivec(void) |
| 59 | { | |
| 60 | msr_check_and_clear(MSR_VEC); | |
| 61 | } | |
| de2a20aa | 62 | #else |
| 6f515d84 | 63 | static inline void save_altivec(struct task_struct *t) { } |
| de2a20aa | 64 | static inline void __giveup_altivec(struct task_struct *t) { } |
| 44c10404 ML |
65 | static inline void enable_kernel_altivec(void) |
| 66 | { | |
| 67 | BUILD_BUG(); | |
| 68 | } | |
| 69 | ||
| 70 | static inline void disable_kernel_altivec(void) | |
| 71 | { | |
| 72 | BUILD_BUG(); | |
| 73 | } | |
| ae3a197e DH |
74 | #endif |
| 75 | ||
| 76 | #ifdef CONFIG_VSX | |
| d1e1cf2e | 77 | extern void enable_kernel_vsx(void); |
| ae3a197e | 78 | extern void flush_vsx_to_thread(struct task_struct *); |
| 3eb5d588 AB |
79 | static inline void disable_kernel_vsx(void) |
| 80 | { | |
| 81 | msr_check_and_clear(MSR_FP|MSR_VEC|MSR_VSX); | |
| 82 | } | |
| bd737588 CL |
83 | #else |
| 84 | static inline void enable_kernel_vsx(void) | |
| 85 | { | |
| 86 | BUILD_BUG(); | |
| 87 | } | |
| 88 | ||
| 89 | static inline void disable_kernel_vsx(void) | |
| 90 | { | |
| 91 | BUILD_BUG(); | |
| 92 | } | |
| ae3a197e DH |
93 | #endif |
| 94 | ||
| 95 | #ifdef CONFIG_SPE | |
| d1e1cf2e | 96 | extern void enable_kernel_spe(void); |
| ae3a197e | 97 | extern void flush_spe_to_thread(struct task_struct *); |
| 98da581e AB |
98 | extern void giveup_spe(struct task_struct *); |
| 99 | extern void __giveup_spe(struct task_struct *); | |
| 3eb5d588 AB |
100 | static inline void disable_kernel_spe(void) |
| 101 | { | |
| 102 | msr_check_and_clear(MSR_SPE); | |
| 103 | } | |
| de2a20aa CB |
104 | #else |
| 105 | static inline void __giveup_spe(struct task_struct *t) { } | |
| ae3a197e DH |
106 | #endif |
| 107 | ||
| 330a1eb7 ME |
108 | static inline void clear_task_ebb(struct task_struct *t) |
| 109 | { | |
| 110 | #ifdef CONFIG_PPC_BOOK3S_64 | |
| 111 | /* EBB perf events are not inherited, so clear all EBB state. */ | |
| 3df48c98 ME |
112 | t->thread.ebbrr = 0; |
| 113 | t->thread.ebbhr = 0; | |
| 330a1eb7 ME |
114 | t->thread.bescr = 0; |
| 115 | t->thread.mmcr2 = 0; | |
| 116 | t->thread.mmcr0 = 0; | |
| 117 | t->thread.siar = 0; | |
| 118 | t->thread.sdar = 0; | |
| 119 | t->thread.sier = 0; | |
| 120 | t->thread.used_ebb = 0; | |
| 121 | #endif | |
| 122 | } | |
| 123 | ||
| 34e119c9 | 124 | void kvmppc_save_user_regs(void); |
| 5236756d | 125 | void kvmppc_save_current_sprs(void); |
| 34e119c9 | 126 | |
| ec233ede | 127 | extern int set_thread_tidr(struct task_struct *t); |
| ec233ede | 128 | |
| ae3a197e | 129 | #endif /* _ASM_POWERPC_SWITCH_TO_H */ |