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-rw-r--r--arch/sh/include/asm/fpu.h74
1 files changed, 74 insertions, 0 deletions
diff --git a/arch/sh/include/asm/fpu.h b/arch/sh/include/asm/fpu.h
new file mode 100644
index 000000000..43cfaf929
--- /dev/null
+++ b/arch/sh/include/asm/fpu.h
@@ -0,0 +1,74 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_SH_FPU_H
+#define __ASM_SH_FPU_H
+
+#ifndef __ASSEMBLY__
+
+#include <asm/ptrace.h>
+
+struct task_struct;
+
+#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;
+}
+
+extern void save_fpu(struct task_struct *__tsk);
+extern void restore_fpu(struct task_struct *__tsk);
+extern void fpu_state_restore(struct pt_regs *regs);
+extern void __fpu_state_restore(void);
+#else
+#define save_fpu(tsk) do { } while (0)
+#define restore_fpu(tsk) do { } while (0)
+#define release_fpu(regs) do { } while (0)
+#define grab_fpu(regs) do { } while (0)
+#define fpu_state_restore(regs) do { } while (0)
+#define __fpu_state_restore(regs) do { } while (0)
+#endif
+
+struct user_regset;
+
+extern int do_fpu_inst(unsigned short, struct pt_regs *);
+extern int init_fpu(struct task_struct *);
+
+extern int fpregs_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf);
+
+static inline void __unlazy_fpu(struct task_struct *tsk, struct pt_regs *regs)
+{
+ if (task_thread_info(tsk)->status & TS_USEDFPU) {
+ task_thread_info(tsk)->status &= ~TS_USEDFPU;
+ save_fpu(tsk);
+ release_fpu(regs);
+ } else
+ tsk->thread.fpu_counter = 0;
+}
+
+static inline void unlazy_fpu(struct task_struct *tsk, struct pt_regs *regs)
+{
+ preempt_disable();
+ __unlazy_fpu(tsk, regs);
+ preempt_enable();
+}
+
+static inline void clear_fpu(struct task_struct *tsk, struct pt_regs *regs)
+{
+ preempt_disable();
+ if (task_thread_info(tsk)->status & TS_USEDFPU) {
+ task_thread_info(tsk)->status &= ~TS_USEDFPU;
+ release_fpu(regs);
+ }
+ preempt_enable();
+}
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* __ASM_SH_FPU_H */