1 files changed, 55 insertions, 0 deletions
diff --git a/arch/sh/include/asm/fpu.h b/arch/sh/include/asm/fpu.h
new file mode 100644
index 00000000000..91462fea150
--- /dev/null
+++ b/arch/sh/include/asm/fpu.h
@@ -0,0 +1,55 @@
+#ifndef __ASM_SH_FPU_H
+#define __ASM_SH_FPU_H
+
+#ifndef __ASSEMBLY__
+#include <linux/preempt.h>
+#include <asm/ptrace.h>
+
+#ifdef CONFIG_SH_FPU
+static inline void release_fpu(struct pt_regs *regs)
+{
+	regs->sr |= SR_FD;
+}
+
+static inline void grab_fpu(struct pt_regs *regs)
+{
+	regs->sr &= ~SR_FD;
+}
+
+struct task_struct;
+
+extern void save_fpu(struct task_struct *__tsk, struct pt_regs *regs);
+#else
+
+#define release_fpu(regs)	do { } while (0)
+#define grab_fpu(regs)		do { } while (0)
+
+static inline void save_fpu(struct task_struct *tsk, struct pt_regs *regs)
+{
+	clear_tsk_thread_flag(tsk, TIF_USEDFPU);
+}
+#endif
+
+extern int do_fpu_inst(unsigned short, struct pt_regs *);
+
+static inline void unlazy_fpu(struct task_struct *tsk, struct pt_regs *regs)
+{
+	preempt_disable();
+	if (test_tsk_thread_flag(tsk, TIF_USEDFPU))
+		save_fpu(tsk, regs);
+	preempt_enable();
+}
+
+static inline void clear_fpu(struct task_struct *tsk, struct pt_regs *regs)
+{
+	preempt_disable();
+	if (test_tsk_thread_flag(tsk, TIF_USEDFPU)) {
+		clear_tsk_thread_flag(tsk, TIF_USEDFPU);
+		release_fpu(regs);
+	}
+	preempt_enable();
+}
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* __ASM_SH_FPU_H */