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| author | Paul Mundt <lethal@linux-sh.org> | 2009-04-14 06:29:07 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2009-04-14 06:29:07 +0900 |
| commit | f499cae1e59d75d5eb24c23d47cf8986e6032c6d (patch) | |
| tree | 1af6235c18391212c40116eb90b01eae8938efee /arch/mn10300/include/asm/fpu.h | |
| parent | fc3f55e672e1ed917dd9e215af81939cd3d717da (diff) | |
| parent | 80a04d3f2f94fb68b5df05e3ac6697130bc3467a (diff) | |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Diffstat (limited to 'arch/mn10300/include/asm/fpu.h')
| -rw-r--r-- | arch/mn10300/include/asm/fpu.h | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/arch/mn10300/include/asm/fpu.h b/arch/mn10300/include/asm/fpu.h new file mode 100644 index 00000000000..64a2b83a7a6 --- /dev/null +++ b/arch/mn10300/include/asm/fpu.h @@ -0,0 +1,85 @@ +/* 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 */ |