1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
3*4882a593Smuzhiyun
4*4882a593Smuzhiyun #ifndef __ASM_CSKY_SWITCH_TO_H
5*4882a593Smuzhiyun #define __ASM_CSKY_SWITCH_TO_H
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun #include <linux/thread_info.h>
8*4882a593Smuzhiyun #ifdef CONFIG_CPU_HAS_FPU
9*4882a593Smuzhiyun #include <abi/fpu.h>
__switch_to_fpu(struct task_struct * prev,struct task_struct * next)10*4882a593Smuzhiyun static inline void __switch_to_fpu(struct task_struct *prev,
11*4882a593Smuzhiyun struct task_struct *next)
12*4882a593Smuzhiyun {
13*4882a593Smuzhiyun save_to_user_fp(&prev->thread.user_fp);
14*4882a593Smuzhiyun restore_from_user_fp(&next->thread.user_fp);
15*4882a593Smuzhiyun }
16*4882a593Smuzhiyun #else
__switch_to_fpu(struct task_struct * prev,struct task_struct * next)17*4882a593Smuzhiyun static inline void __switch_to_fpu(struct task_struct *prev,
18*4882a593Smuzhiyun struct task_struct *next)
19*4882a593Smuzhiyun {}
20*4882a593Smuzhiyun #endif
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun /*
23*4882a593Smuzhiyun * Context switching is now performed out-of-line in switch_to.S
24*4882a593Smuzhiyun */
25*4882a593Smuzhiyun extern struct task_struct *__switch_to(struct task_struct *,
26*4882a593Smuzhiyun struct task_struct *);
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun #define switch_to(prev, next, last) \
29*4882a593Smuzhiyun do { \
30*4882a593Smuzhiyun struct task_struct *__prev = (prev); \
31*4882a593Smuzhiyun struct task_struct *__next = (next); \
32*4882a593Smuzhiyun __switch_to_fpu(__prev, __next); \
33*4882a593Smuzhiyun ((last) = __switch_to((prev), (next))); \
34*4882a593Smuzhiyun } while (0)
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun #endif /* __ASM_CSKY_SWITCH_TO_H */
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