arch/csky/include/asm/switch_to.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2
   3 #ifndef __ASM_CSKY_SWITCH_TO_H
   4 #define __ASM_CSKY_SWITCH_TO_H
   5
   6 #include <linux/thread_info.h>
   7 #ifdef CONFIG_CPU_HAS_FPU
   8 #include <abi/fpu.h>
   9 static inline void __switch_to_fpu(struct task_struct *prev,
  10                                    struct task_struct *next)
  11 {
  12         save_to_user_fp(&prev->thread.user_fp);
  13         restore_from_user_fp(&next->thread.user_fp);
  14 }
  15 #else
  16 static inline void __switch_to_fpu(struct task_struct *prev,
  17                                    struct task_struct *next)
  18 {}
  19 #endif
  20
  21 /*
  22  * Context switching is now performed out-of-line in switch_to.S
  23  */
  24 extern struct task_struct *__switch_to(struct task_struct *,
  25                                        struct task_struct *);
  26
  27 #define switch_to(prev, next, last)                                     \
  28         do {                                                            \
  29                 struct task_struct *__prev = (prev);                    \
  30                 struct task_struct *__next = (next);                    \
  31                 __switch_to_fpu(__prev, __next);                        \
  32                 ((last) = __switch_to((prev), (next)));                 \
  33         } while (0)
  34
  35 #endif /* __ASM_CSKY_SWITCH_TO_H */