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Diffstat (limited to 'arch/sh/include/asm/fpu.h')
-rw-r--r--arch/sh/include/asm/fpu.h55
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 000000000000..91462fea1507
--- /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 */