tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
9static inline void release_fpu(struct pt_regs *regs)
10{
11 regs->sr |= SR_FD;
12}
13
14static inline void grab_fpu(struct pt_regs *regs)
15{
16 regs->sr &= ~SR_FD;
17}
18
19struct task_struct;
20
21extern 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
27static 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
33extern int do_fpu_inst(unsigned short, struct pt_regs *);
34
35static 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
43static 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 */