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sh: Add FPU registers to regset interface.

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Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt
2008-09-21 19:04:55 +09:00
parent 4b4cf7595a
commit e7ab3cd251
5 changed files with 108 additions and 9 deletions
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19
arch/sh/include/asm/fpu.h
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@@ -30,8 +30,15 @@ static inline void save_fpu(struct task_struct *tsk, struct pt_regs *regs)
}
#endif
struct user_regset;
extern int do_fpu_inst(unsigned short, struct pt_regs *);
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)
{
preempt_disable();
@@ -50,6 +57,18 @@ static inline void clear_fpu(struct task_struct *tsk, struct pt_regs *regs)
preempt_enable();
}
static inline int init_fpu(struct task_struct *tsk)
{
if (tsk_used_math(tsk)) {
if ((boot_cpu_data.flags & CPU_HAS_FPU) && tsk == current)
unlazy_fpu(tsk, task_pt_regs(tsk));
return 0;
}
set_stopped_child_used_math(tsk);
return 0;
}
#endif /* __ASSEMBLY__ */
#endif /* __ASM_SH_FPU_H */