diff options
Diffstat (limited to 'arch/sh/include/asm/fpu.h')
| -rw-r--r-- | arch/sh/include/asm/fpu.h | 55 |
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 */ |