1 #ifndef __ASM_SH_FPU_H 2 #define __ASM_SH_FPU_H 3 4 #ifndef __ASSEMBLY__ 5 #include <linux/preempt.h> 6 #include <asm/ptrace.h> 7 8 #ifdef CONFIG_SH_FPU 9 static inline void release_fpu(struct pt_regs *regs) 10 { 11 regs->sr |= SR_FD; 12 } 13 14 static inline void grab_fpu(struct pt_regs *regs) 15 { 16 regs->sr &= ~SR_FD; 17 } 18 19 struct task_struct; 20 21 extern void save_fpu(struct task_struct *__tsk, struct pt_regs *regs); 22 #else 23 24 #define release_fpu(regs) do { } while (0) 25 #define grab_fpu(regs) do { } while (0) 26 27 static inline void save_fpu(struct task_struct *tsk, struct pt_regs *regs) 28 { 29 clear_tsk_thread_flag(tsk, TIF_USEDFPU); 30 } 31 #endif 32 33 extern int do_fpu_inst(unsigned short, struct pt_regs *); 34 35 static inline void unlazy_fpu(struct task_struct *tsk, struct pt_regs *regs) 36 { 37 preempt_disable(); 38 if (test_tsk_thread_flag(tsk, TIF_USEDFPU)) 39 save_fpu(tsk, regs); 40 preempt_enable(); 41 } 42 43 static inline void clear_fpu(struct task_struct *tsk, struct pt_regs *regs) 44 { 45 preempt_disable(); 46 if (test_tsk_thread_flag(tsk, TIF_USEDFPU)) { 47 clear_tsk_thread_flag(tsk, TIF_USEDFPU); 48 release_fpu(regs); 49 } 50 preempt_enable(); 51 } 52 53 #endif /* __ASSEMBLY__ */ 54 55 #endif /* __ASM_SH_FPU_H */ 56