1 /* SPDX-License-Identifier: GPL-2.0 */ 2 // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. 3 4 #ifndef __ASM_CSKY_SWITCH_TO_H 5 #define __ASM_CSKY_SWITCH_TO_H 6 7 #include <linux/thread_info.h> 8 #ifdef CONFIG_CPU_HAS_FPU 9 #include <abi/fpu.h> 10 static inline void __switch_to_fpu(struct task_struct *prev, 11 struct task_struct *next) 12 { 13 save_to_user_fp(&prev->thread.user_fp); 14 restore_from_user_fp(&next->thread.user_fp); 15 } 16 #else 17 static inline void __switch_to_fpu(struct task_struct *prev, 18 struct task_struct *next) 19 {} 20 #endif 21 22 /* 23 * Context switching is now performed out-of-line in switch_to.S 24 */ 25 extern struct task_struct *__switch_to(struct task_struct *, 26 struct task_struct *); 27 28 #define switch_to(prev, next, last) \ 29 do { \ 30 struct task_struct *__prev = (prev); \ 31 struct task_struct *__next = (next); \ 32 __switch_to_fpu(__prev, __next); \ 33 ((last) = __switch_to((prev), (next))); \ 34 } while (0) 35 36 #endif /* __ASM_CSKY_SWITCH_TO_H */ 37