| | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| | 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 | |
| | 8 | #include <linux/sched.h> |
| | 9 | #include <asm/reg.h> |
| | 10 | |
| | 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 | |
| | 19 | extern struct task_struct *_switch(struct thread_struct *prev, |
| | 20 | struct thread_struct *next); |
| | 21 | |
| | 22 | extern void switch_booke_debug_regs(struct debug_reg *new_debug); |
| | 23 | |
| | 24 | extern int emulate_altivec(struct pt_regs *); |
| | 25 | |
| | 26 | #ifdef CONFIG_PPC_BOOK3S_64 |
| | 27 | void restore_math(struct pt_regs *regs); |
| | 28 | #else |
| | 29 | static inline void restore_math(struct pt_regs *regs) |
| | 30 | { |
| | 31 | } |
| | 32 | #endif |
| | 33 | |
| | 34 | void restore_tm_state(struct pt_regs *regs); |
| | 35 | |
| | 36 | extern void flush_all_to_thread(struct task_struct *); |
| | 37 | extern void giveup_all(struct task_struct *); |
| | 38 | |
| | 39 | #ifdef CONFIG_PPC_FPU |
| | 40 | extern void enable_kernel_fp(void); |
| | 41 | extern void flush_fp_to_thread(struct task_struct *); |
| | 42 | extern void giveup_fpu(struct task_struct *); |
| | 43 | extern void save_fpu(struct task_struct *); |
| | 44 | static inline void disable_kernel_fp(void) |
| | 45 | { |
| | 46 | msr_check_and_clear(MSR_FP); |
| | 47 | } |
| | 48 | #else |
| | 49 | static inline void save_fpu(struct task_struct *t) { } |
| | 50 | static inline void flush_fp_to_thread(struct task_struct *t) { } |
| | 51 | static inline void enable_kernel_fp(void) |
| | 52 | { |
| | 53 | BUILD_BUG(); |
| | 54 | } |
| | 55 | #endif |
| | 56 | |
| | 57 | #ifdef CONFIG_ALTIVEC |
| | 58 | extern void enable_kernel_altivec(void); |
| | 59 | extern void flush_altivec_to_thread(struct task_struct *); |
| | 60 | extern void giveup_altivec(struct task_struct *); |
| | 61 | extern void save_altivec(struct task_struct *); |
| | 62 | static inline void disable_kernel_altivec(void) |
| | 63 | { |
| | 64 | msr_check_and_clear(MSR_VEC); |
| | 65 | } |
| | 66 | #else |
| | 67 | static inline void save_altivec(struct task_struct *t) { } |
| | 68 | static inline void __giveup_altivec(struct task_struct *t) { } |
| | 69 | static inline void enable_kernel_altivec(void) |
| | 70 | { |
| | 71 | BUILD_BUG(); |
| | 72 | } |
| | 73 | |
| | 74 | static inline void disable_kernel_altivec(void) |
| | 75 | { |
| | 76 | BUILD_BUG(); |
| | 77 | } |
| | 78 | #endif |
| | 79 | |
| | 80 | #ifdef CONFIG_VSX |
| | 81 | extern void enable_kernel_vsx(void); |
| | 82 | extern void flush_vsx_to_thread(struct task_struct *); |
| | 83 | static inline void disable_kernel_vsx(void) |
| | 84 | { |
| | 85 | msr_check_and_clear(MSR_FP|MSR_VEC|MSR_VSX); |
| | 86 | } |
| | 87 | #else |
| | 88 | static inline void enable_kernel_vsx(void) |
| | 89 | { |
| | 90 | BUILD_BUG(); |
| | 91 | } |
| | 92 | |
| | 93 | static inline void disable_kernel_vsx(void) |
| | 94 | { |
| | 95 | BUILD_BUG(); |
| | 96 | } |
| | 97 | #endif |
| | 98 | |
| | 99 | #ifdef CONFIG_SPE |
| | 100 | extern void enable_kernel_spe(void); |
| | 101 | extern void flush_spe_to_thread(struct task_struct *); |
| | 102 | extern void giveup_spe(struct task_struct *); |
| | 103 | extern void __giveup_spe(struct task_struct *); |
| | 104 | static inline void disable_kernel_spe(void) |
| | 105 | { |
| | 106 | msr_check_and_clear(MSR_SPE); |
| | 107 | } |
| | 108 | #else |
| | 109 | static inline void __giveup_spe(struct task_struct *t) { } |
| | 110 | #endif |
| | 111 | |
| | 112 | static inline void clear_task_ebb(struct task_struct *t) |
| | 113 | { |
| | 114 | #ifdef CONFIG_PPC_BOOK3S_64 |
| | 115 | /* EBB perf events are not inherited, so clear all EBB state. */ |
| | 116 | t->thread.ebbrr = 0; |
| | 117 | t->thread.ebbhr = 0; |
| | 118 | t->thread.bescr = 0; |
| | 119 | t->thread.mmcr2 = 0; |
| | 120 | t->thread.mmcr0 = 0; |
| | 121 | t->thread.siar = 0; |
| | 122 | t->thread.sdar = 0; |
| | 123 | t->thread.sier = 0; |
| | 124 | t->thread.used_ebb = 0; |
| | 125 | #endif |
| | 126 | } |
| | 127 | |
| | 128 | void kvmppc_save_user_regs(void); |
| | 129 | void kvmppc_save_current_sprs(void); |
| | 130 | |
| | 131 | extern int set_thread_tidr(struct task_struct *t); |
| | 132 | |
| | 133 | #endif /* _ASM_POWERPC_SWITCH_TO_H */ |
projects / linux-2.6-block.git / blame_incremental