forked from mirrors/linux
e9564df753
This patch adds files related to task_switch, sigcontext, signal, fpu context switch. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Eric W. Biederman <ebiederm@xmission.com>
36 lines
982 B
C
36 lines
982 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
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#ifndef __ASM_CSKY_SWITCH_TO_H
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#define __ASM_CSKY_SWITCH_TO_H
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#include <linux/thread_info.h>
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#ifdef CONFIG_CPU_HAS_FPU
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#include <abi/fpu.h>
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static inline void __switch_to_fpu(struct task_struct *prev,
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struct task_struct *next)
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{
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save_to_user_fp(&prev->thread.user_fp);
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restore_from_user_fp(&next->thread.user_fp);
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}
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#else
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static inline void __switch_to_fpu(struct task_struct *prev,
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struct task_struct *next)
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{}
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#endif
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/*
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* Context switching is now performed out-of-line in switch_to.S
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*/
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extern struct task_struct *__switch_to(struct task_struct *,
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struct task_struct *);
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#define switch_to(prev, next, last) \
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do { \
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struct task_struct *__prev = (prev); \
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struct task_struct *__next = (next); \
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__switch_to_fpu(__prev, __next); \
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((last) = __switch_to((prev), (next))); \
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} while (0)
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#endif /* __ASM_CSKY_SWITCH_TO_H */
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