arch/powerpc/include/asm/switch_to.h

   1 /*
   2  * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
   3  */
   4 #ifndef _ASM_POWERPC_SWITCH_TO_H
   5 #define _ASM_POWERPC_SWITCH_TO_H
   6
   7 struct thread_struct;
   8 struct task_struct;
   9 struct pt_regs;
  10
  11 extern struct task_struct *__switch_to(struct task_struct *,
  12         struct task_struct *);
  13 #define switch_to(prev, next, last)     ((last) = __switch_to((prev), (next)))
  14
  15 struct thread_struct;
  16 extern struct task_struct *_switch(struct thread_struct *prev,
  17                                    struct thread_struct *next);
  18
  19 extern void giveup_fpu(struct task_struct *);
  20 extern void load_up_fpu(void);
  21 extern void disable_kernel_fp(void);
  22 extern void enable_kernel_fp(void);
  23 extern void flush_fp_to_thread(struct task_struct *);
  24 extern void enable_kernel_altivec(void);
  25 extern void load_up_altivec(struct task_struct *);
  26 extern int emulate_altivec(struct pt_regs *);
  27 extern void __giveup_vsx(struct task_struct *);
  28 extern void giveup_vsx(struct task_struct *);
  29 extern void enable_kernel_spe(void);
  30 extern void giveup_spe(struct task_struct *);
  31 extern void load_up_spe(struct task_struct *);
  32
  33 #ifndef CONFIG_SMP
  34 extern void discard_lazy_cpu_state(void);
  35 #else
  36 static inline void discard_lazy_cpu_state(void)
  37 {
  38 }
  39 #endif
  40
  41 #ifdef CONFIG_ALTIVEC
  42 extern void flush_altivec_to_thread(struct task_struct *);
  43 extern void giveup_altivec(struct task_struct *);
  44 extern void giveup_altivec_notask(void);
  45 #else
  46 static inline void flush_altivec_to_thread(struct task_struct *t)
  47 {
  48 }
  49 static inline void giveup_altivec(struct task_struct *t)
  50 {
  51 }
  52 #endif
  53
  54 #ifdef CONFIG_VSX
  55 extern void flush_vsx_to_thread(struct task_struct *);
  56 #else
  57 static inline void flush_vsx_to_thread(struct task_struct *t)
  58 {
  59 }
  60 #endif
  61
  62 #ifdef CONFIG_SPE
  63 extern void flush_spe_to_thread(struct task_struct *);
  64 #else
  65 static inline void flush_spe_to_thread(struct task_struct *t)
  66 {
  67 }
  68 #endif
  69
  70 #endif /* _ASM_POWERPC_SWITCH_TO_H */