2 * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
4 #ifndef _ASM_POWERPC_SWITCH_TO_H
5 #define _ASM_POWERPC_SWITCH_TO_H
13 extern struct task_struct *__switch_to(struct task_struct *,
14 struct task_struct *);
15 #define switch_to(prev, next, last) ((last) = __switch_to((prev), (next)))
18 extern struct task_struct *_switch(struct thread_struct *prev,
19 struct thread_struct *next);
21 extern void enable_kernel_fp(void);
22 extern void enable_kernel_altivec(void);
23 extern void enable_kernel_vsx(void);
24 extern int emulate_altivec(struct pt_regs *);
25 extern void __giveup_vsx(struct task_struct *);
26 extern void giveup_vsx(struct task_struct *);
27 extern void enable_kernel_spe(void);
28 extern void load_up_spe(struct task_struct *);
29 extern void switch_booke_debug_regs(struct debug_reg *new_debug);
32 extern void flush_fp_to_thread(struct task_struct *);
33 extern void giveup_fpu(struct task_struct *);
34 extern void __giveup_fpu(struct task_struct *);
35 static inline void disable_kernel_fp(void)
37 msr_check_and_clear(MSR_FP);
41 static inline void flush_fp_to_thread(struct task_struct *t) { }
42 static inline void giveup_fpu(struct task_struct *t) { }
43 static inline void __giveup_fpu(struct task_struct *t) { }
47 extern void flush_altivec_to_thread(struct task_struct *);
48 extern void giveup_altivec(struct task_struct *);
49 extern void __giveup_altivec(struct task_struct *);
50 static inline void disable_kernel_altivec(void)
52 msr_check_and_clear(MSR_VEC);
55 static inline void flush_altivec_to_thread(struct task_struct *t) { }
56 static inline void giveup_altivec(struct task_struct *t) { }
57 static inline void __giveup_altivec(struct task_struct *t) { }
61 extern void flush_vsx_to_thread(struct task_struct *);
62 static inline void disable_kernel_vsx(void)
64 msr_check_and_clear(MSR_FP|MSR_VEC|MSR_VSX);
67 static inline void flush_vsx_to_thread(struct task_struct *t)
73 extern void flush_spe_to_thread(struct task_struct *);
74 extern void giveup_spe(struct task_struct *);
75 extern void __giveup_spe(struct task_struct *);
76 static inline void disable_kernel_spe(void)
78 msr_check_and_clear(MSR_SPE);
81 static inline void flush_spe_to_thread(struct task_struct *t) { }
82 static inline void giveup_spe(struct task_struct *t) { }
83 static inline void __giveup_spe(struct task_struct *t) { }
86 static inline void clear_task_ebb(struct task_struct *t)
88 #ifdef CONFIG_PPC_BOOK3S_64
89 /* EBB perf events are not inherited, so clear all EBB state. */
98 t->thread.used_ebb = 0;
102 #endif /* _ASM_POWERPC_SWITCH_TO_H */