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 000000000000..64a2b83a7a6a
--- /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 */