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)))
17 extern struct task_struct
*_switch(struct thread_struct
*prev
,
18 struct thread_struct
*next
);
20 extern void switch_booke_debug_regs(struct debug_reg
*new_debug
);
22 extern int emulate_altivec(struct pt_regs
*);
24 extern void flush_all_to_thread(struct task_struct
*);
25 extern void giveup_all(struct task_struct
*);
28 extern void enable_kernel_fp(void);
29 extern void flush_fp_to_thread(struct task_struct
*);
30 extern void giveup_fpu(struct task_struct
*);
31 extern void save_fpu(struct task_struct
*);
32 static inline void disable_kernel_fp(void)
34 msr_check_and_clear(MSR_FP
);
37 static inline void __giveup_fpu(struct task_struct
*t
) { }
38 static inline void save_fpu(struct task_struct
*t
) { }
39 static inline void flush_fp_to_thread(struct task_struct
*t
) { }
43 extern void enable_kernel_altivec(void);
44 extern void flush_altivec_to_thread(struct task_struct
*);
45 extern void giveup_altivec(struct task_struct
*);
46 extern void save_altivec(struct task_struct
*);
47 static inline void disable_kernel_altivec(void)
49 msr_check_and_clear(MSR_VEC
);
52 static inline void save_altivec(struct task_struct
*t
) { }
53 static inline void __giveup_altivec(struct task_struct
*t
) { }
57 extern void enable_kernel_vsx(void);
58 extern void flush_vsx_to_thread(struct task_struct
*);
59 static inline void disable_kernel_vsx(void)
61 msr_check_and_clear(MSR_FP
|MSR_VEC
|MSR_VSX
);
66 extern void enable_kernel_spe(void);
67 extern void flush_spe_to_thread(struct task_struct
*);
68 extern void giveup_spe(struct task_struct
*);
69 extern void __giveup_spe(struct task_struct
*);
70 static inline void disable_kernel_spe(void)
72 msr_check_and_clear(MSR_SPE
);
75 static inline void __giveup_spe(struct task_struct
*t
) { }
78 static inline void clear_task_ebb(struct task_struct
*t
)
80 #ifdef CONFIG_PPC_BOOK3S_64
81 /* EBB perf events are not inherited, so clear all EBB state. */
90 t
->thread
.used_ebb
= 0;
94 #endif /* _ASM_POWERPC_SWITCH_TO_H */