xref: /openbmc/linux/arch/csky/include/asm/switch_to.h (revision 6607aa6f)
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>
__switch_to_fpu(struct task_struct * prev,struct task_struct * next)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
__switch_to_fpu(struct task_struct * prev,struct task_struct * next)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 */
36