85 lines
1.8 KiB
C
85 lines
1.8 KiB
C
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#ifndef __ASM_SH_FPU_H
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#define __ASM_SH_FPU_H
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#ifndef __ASSEMBLY__
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#include <linux/preempt.h>
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#include <asm/ptrace.h>
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#ifdef CONFIG_SH_FPU
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static inline void release_fpu(struct pt_regs *regs)
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{
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regs->sr |= SR_FD;
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}
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static inline void grab_fpu(struct pt_regs *regs)
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{
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regs->sr &= ~SR_FD;
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}
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struct task_struct;
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extern void save_fpu(struct task_struct *__tsk);
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void fpu_state_restore(struct pt_regs *regs);
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#else
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#define release_fpu(regs) do { } while (0)
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#define grab_fpu(regs) do { } while (0)
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static inline void save_fpu(struct task_struct *tsk, struct pt_regs *regs)
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{
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clear_tsk_thread_flag(tsk, TIF_USEDFPU);
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}
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#endif
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struct user_regset;
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extern int do_fpu_inst(unsigned short, struct pt_regs *);
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extern int fpregs_get(struct task_struct *target,
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const struct user_regset *regset,
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unsigned int pos, unsigned int count,
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void *kbuf, void __user *ubuf);
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static inline void __unlazy_fpu(struct task_struct *tsk, struct pt_regs *regs)
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{
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if (task_thread_info(tsk)->status & TS_USEDFPU) {
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task_thread_info(tsk)->status &= ~TS_USEDFPU;
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save_fpu(tsk);
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release_fpu(regs);
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} else
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tsk->fpu_counter = 0;
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}
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static inline void unlazy_fpu(struct task_struct *tsk, struct pt_regs *regs)
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{
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preempt_disable();
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__unlazy_fpu(tsk, regs);
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preempt_enable();
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}
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static inline void clear_fpu(struct task_struct *tsk, struct pt_regs *regs)
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{
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preempt_disable();
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if (task_thread_info(tsk)->status & TS_USEDFPU) {
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task_thread_info(tsk)->status &= ~TS_USEDFPU;
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release_fpu(regs);
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}
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preempt_enable();
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}
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static inline int init_fpu(struct task_struct *tsk)
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{
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if (tsk_used_math(tsk)) {
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if ((boot_cpu_data.flags & CPU_HAS_FPU) && tsk == current)
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unlazy_fpu(tsk, task_pt_regs(tsk));
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return 0;
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}
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set_stopped_child_used_math(tsk);
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return 0;
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}
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#endif /* __ASSEMBLY__ */
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#endif /* __ASM_SH_FPU_H */
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