diff options
Diffstat (limited to 'arch/csky/include/asm/switch_to.h')
| -rw-r--r-- | arch/csky/include/asm/switch_to.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/csky/include/asm/switch_to.h b/arch/csky/include/asm/switch_to.h new file mode 100644 index 000000000..35a39e889 --- /dev/null +++ b/arch/csky/include/asm/switch_to.h @@ -0,0 +1,36 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. + +#ifndef __ASM_CSKY_SWITCH_TO_H +#define __ASM_CSKY_SWITCH_TO_H + +#include <linux/thread_info.h> +#ifdef CONFIG_CPU_HAS_FPU +#include <abi/fpu.h> +static inline void __switch_to_fpu(struct task_struct *prev, + struct task_struct *next) +{ + save_to_user_fp(&prev->thread.user_fp); + restore_from_user_fp(&next->thread.user_fp); +} +#else +static inline void __switch_to_fpu(struct task_struct *prev, + struct task_struct *next) +{} +#endif + +/* + * Context switching is now performed out-of-line in switch_to.S + */ +extern struct task_struct *__switch_to(struct task_struct *, + struct task_struct *); + +#define switch_to(prev, next, last) \ + do { \ + struct task_struct *__prev = (prev); \ + struct task_struct *__next = (next); \ + __switch_to_fpu(__prev, __next); \ + ((last) = __switch_to((prev), (next))); \ + } while (0) + +#endif /* __ASM_CSKY_SWITCH_TO_H */ |