mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-16 16:54:20 +08:00
86 lines
2.3 KiB
C
86 lines
2.3 KiB
C
/* MN10300 FPU definitions
|
|
*
|
|
* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
|
|
* Written by David Howells (dhowells@redhat.com)
|
|
* Derived from include/asm-i386/i387.h: Copyright (C) 1994 Linus Torvalds
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public Licence
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the Licence, or (at your option) any later version.
|
|
*/
|
|
#ifndef _ASM_FPU_H
|
|
#define _ASM_FPU_H
|
|
|
|
#include <asm/processor.h>
|
|
#include <asm/sigcontext.h>
|
|
#include <asm/user.h>
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
/* the task that owns the FPU state */
|
|
extern struct task_struct *fpu_state_owner;
|
|
|
|
#define set_using_fpu(tsk) \
|
|
do { \
|
|
(tsk)->thread.fpu_flags |= THREAD_USING_FPU; \
|
|
} while (0)
|
|
|
|
#define clear_using_fpu(tsk) \
|
|
do { \
|
|
(tsk)->thread.fpu_flags &= ~THREAD_USING_FPU; \
|
|
} while (0)
|
|
|
|
#define is_using_fpu(tsk) ((tsk)->thread.fpu_flags & THREAD_USING_FPU)
|
|
|
|
#define unlazy_fpu(tsk) \
|
|
do { \
|
|
preempt_disable(); \
|
|
if (fpu_state_owner == (tsk)) \
|
|
fpu_save(&tsk->thread.fpu_state); \
|
|
preempt_enable(); \
|
|
} while (0)
|
|
|
|
#define exit_fpu() \
|
|
do { \
|
|
struct task_struct *__tsk = current; \
|
|
preempt_disable(); \
|
|
if (fpu_state_owner == __tsk) \
|
|
fpu_state_owner = NULL; \
|
|
preempt_enable(); \
|
|
} while (0)
|
|
|
|
#define flush_fpu() \
|
|
do { \
|
|
struct task_struct *__tsk = current; \
|
|
preempt_disable(); \
|
|
if (fpu_state_owner == __tsk) { \
|
|
fpu_state_owner = NULL; \
|
|
__tsk->thread.uregs->epsw &= ~EPSW_FE; \
|
|
} \
|
|
preempt_enable(); \
|
|
clear_using_fpu(__tsk); \
|
|
} while (0)
|
|
|
|
extern asmlinkage void fpu_init_state(void);
|
|
extern asmlinkage void fpu_kill_state(struct task_struct *);
|
|
extern asmlinkage void fpu_disabled(struct pt_regs *, enum exception_code);
|
|
extern asmlinkage void fpu_exception(struct pt_regs *, enum exception_code);
|
|
|
|
#ifdef CONFIG_FPU
|
|
extern asmlinkage void fpu_save(struct fpu_state_struct *);
|
|
extern asmlinkage void fpu_restore(struct fpu_state_struct *);
|
|
#else
|
|
#define fpu_save(a)
|
|
#define fpu_restore(a)
|
|
#endif /* CONFIG_FPU */
|
|
|
|
/*
|
|
* signal frame handlers
|
|
*/
|
|
extern int fpu_setup_sigcontext(struct fpucontext *buf);
|
|
extern int fpu_restore_sigcontext(struct fpucontext *buf);
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif /* _ASM_FPU_H */
|