| /* |
| * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu> |
| */ |
| #ifndef _ASM_POWERPC_SWITCH_TO_H |
| #define _ASM_POWERPC_SWITCH_TO_H |
| |
| struct thread_struct; |
| struct task_struct; |
| struct pt_regs; |
| |
| extern struct task_struct *__switch_to(struct task_struct *, |
| struct task_struct *); |
| #define switch_to(prev, next, last) ((last) = __switch_to((prev), (next))) |
| |
| struct thread_struct; |
| extern struct task_struct *_switch(struct thread_struct *prev, |
| struct thread_struct *next); |
| #ifdef CONFIG_PPC_BOOK3S_64 |
| static inline void save_tar(struct thread_struct *prev) |
| { |
| if (cpu_has_feature(CPU_FTR_ARCH_207S)) |
| prev->tar = mfspr(SPRN_TAR); |
| } |
| #else |
| static inline void save_tar(struct thread_struct *prev) {} |
| #endif |
| |
| extern void load_up_fpu(void); |
| extern void enable_kernel_fp(void); |
| extern void enable_kernel_altivec(void); |
| extern void load_up_altivec(struct task_struct *); |
| extern int emulate_altivec(struct pt_regs *); |
| extern void __giveup_vsx(struct task_struct *); |
| extern void giveup_vsx(struct task_struct *); |
| extern void enable_kernel_spe(void); |
| extern void giveup_spe(struct task_struct *); |
| extern void load_up_spe(struct task_struct *); |
| extern void switch_booke_debug_regs(struct thread_struct *new_thread); |
| |
| #ifndef CONFIG_SMP |
| extern void discard_lazy_cpu_state(void); |
| #else |
| static inline void discard_lazy_cpu_state(void) |
| { |
| } |
| #endif |
| |
| #ifdef CONFIG_PPC_FPU |
| extern void flush_fp_to_thread(struct task_struct *); |
| extern void giveup_fpu(struct task_struct *); |
| #else |
| static inline void flush_fp_to_thread(struct task_struct *t) { } |
| static inline void giveup_fpu(struct task_struct *t) { } |
| #endif |
| |
| #ifdef CONFIG_ALTIVEC |
| extern void flush_altivec_to_thread(struct task_struct *); |
| extern void giveup_altivec(struct task_struct *); |
| extern void giveup_altivec_notask(void); |
| #else |
| static inline void flush_altivec_to_thread(struct task_struct *t) |
| { |
| } |
| static inline void giveup_altivec(struct task_struct *t) |
| { |
| } |
| #endif |
| |
| #ifdef CONFIG_VSX |
| extern void flush_vsx_to_thread(struct task_struct *); |
| #else |
| static inline void flush_vsx_to_thread(struct task_struct *t) |
| { |
| } |
| #endif |
| |
| #ifdef CONFIG_SPE |
| extern void flush_spe_to_thread(struct task_struct *); |
| #else |
| static inline void flush_spe_to_thread(struct task_struct *t) |
| { |
| } |
| #endif |
| |
| static inline void clear_task_ebb(struct task_struct *t) |
| { |
| #ifdef CONFIG_PPC_BOOK3S_64 |
| /* EBB perf events are not inherited, so clear all EBB state. */ |
| t->thread.bescr = 0; |
| t->thread.mmcr2 = 0; |
| t->thread.mmcr0 = 0; |
| t->thread.siar = 0; |
| t->thread.sdar = 0; |
| t->thread.sier = 0; |
| t->thread.used_ebb = 0; |
| #endif |
| } |
| |
| #endif /* _ASM_POWERPC_SWITCH_TO_H */ |