projects / mirror_ubuntu-zesty-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 332fd57b PM |
1 | #ifndef __ASM_SH_FPU_H |
| 2 | #define __ASM_SH_FPU_H | |
| 3 | ||
| 332fd57b | 4 | #ifndef __ASSEMBLY__ |
| 0ea820cf PM |
5 | |
| 6 | struct task_struct; | |
| 332fd57b PM |
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 | ||
| d3ea9fa0 | 19 | extern void save_fpu(struct task_struct *__tsk); |
| 0ea820cf PM |
20 | extern void restore_fpu(struct task_struct *__tsk); |
| 21 | extern void fpu_state_restore(struct pt_regs *regs); | |
| 22 | extern void __fpu_state_restore(void); | |
| 332fd57b | 23 | #else |
| 0ea820cf PM |
24 | #define save_fpu(tsk) do { } while (0) |
| 25 | #define restore_fpu(tsk) do { } while (0) | |
| 26 | #define release_fpu(regs) do { } while (0) | |
| 27 | #define grab_fpu(regs) do { } while (0) | |
| 28 | #define fpu_state_restore(regs) do { } while (0) | |
| 29 | #define __fpu_state_restore(regs) do { } while (0) | |
| 332fd57b PM |
30 | #endif |
| 31 | ||
| e7ab3cd2 PM |
32 | struct user_regset; |
| 33 | ||
| 74d99a5e | 34 | extern int do_fpu_inst(unsigned short, struct pt_regs *); |
| 0ea820cf | 35 | extern int init_fpu(struct task_struct *); |
| 74d99a5e | 36 | |
| e7ab3cd2 PM |
37 | extern int fpregs_get(struct task_struct *target, |
| 38 | const struct user_regset *regset, | |
| 39 | unsigned int pos, unsigned int count, | |
| 40 | void *kbuf, void __user *ubuf); | |
| 41 | ||
| d3ea9fa0 SM |
42 | static inline void __unlazy_fpu(struct task_struct *tsk, struct pt_regs *regs) |
| 43 | { | |
| 44 | if (task_thread_info(tsk)->status & TS_USEDFPU) { | |
| 45 | task_thread_info(tsk)->status &= ~TS_USEDFPU; | |
| 46 | save_fpu(tsk); | |
| 47 | release_fpu(regs); | |
| 48 | } else | |
| 616c05d1 | 49 | tsk->thread.fpu_counter = 0; |
| d3ea9fa0 SM |
50 | } |
| 51 | ||
| 9bbafce2 PM |
52 | static inline void unlazy_fpu(struct task_struct *tsk, struct pt_regs *regs) |
| 53 | { | |
| 54 | preempt_disable(); | |
| d3ea9fa0 | 55 | __unlazy_fpu(tsk, regs); |
| 9bbafce2 PM |
56 | preempt_enable(); |
| 57 | } | |
| 58 | ||
| 59 | static inline void clear_fpu(struct task_struct *tsk, struct pt_regs *regs) | |
| 60 | { | |
| 61 | preempt_disable(); | |
| d3ea9fa0 SM |
62 | if (task_thread_info(tsk)->status & TS_USEDFPU) { |
| 63 | task_thread_info(tsk)->status &= ~TS_USEDFPU; | |
| 9bbafce2 PM |
64 | release_fpu(regs); |
| 65 | } | |
| 66 | preempt_enable(); | |
| 67 | } | |
| 332fd57b PM |
68 | |
| 69 | #endif /* __ASSEMBLY__ */ | |
| 70 | ||
| 71 | #endif /* __ASM_SH_FPU_H */ |