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332fd57b PM |
1 | #ifndef __ASM_SH_FPU_H |
2 | #define __ASM_SH_FPU_H | |
3 | ||
332fd57b | 4 | #ifndef __ASSEMBLY__ |
9bbafce2 | 5 | #include <linux/preempt.h> |
332fd57b PM |
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 | |
138bed15 | 23 | |
332fd57b PM |
24 | #define release_fpu(regs) do { } while (0) |
25 | #define grab_fpu(regs) do { } while (0) | |
138bed15 PM |
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 | } | |
332fd57b PM |
31 | #endif |
32 | ||
74d99a5e PM |
33 | extern int do_fpu_inst(unsigned short, struct pt_regs *); |
34 | ||
9bbafce2 PM |
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 | } | |
332fd57b PM |
52 | |
53 | #endif /* __ASSEMBLY__ */ | |
54 | ||
55 | #endif /* __ASM_SH_FPU_H */ |