git://bbs.cooldavid.org / net-next-2.6.git / blame
| Commit | Line | Data |
|---|---|---|
| 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); | |
| a0458b07 | 22 | void fpu_state_restore(struct pt_regs *regs); |
| 332fd57b | 23 | #else |
| 138bed15 | 24 | |
| 332fd57b PM |
25 | #define release_fpu(regs) do { } while (0) |
| 26 | #define grab_fpu(regs) do { } while (0) | |
| 138bed15 PM |
27 | |
| 28 | static inline void save_fpu(struct task_struct *tsk, struct pt_regs *regs) | |
| 29 | { | |
| 30 | clear_tsk_thread_flag(tsk, TIF_USEDFPU); | |
| 31 | } | |
| 332fd57b PM |
32 | #endif |
| 33 | ||
| e7ab3cd2 PM |
34 | struct user_regset; |
| 35 | ||
| 74d99a5e PM |
36 | extern int do_fpu_inst(unsigned short, struct pt_regs *); |
| 37 | ||
| e7ab3cd2 PM |
38 | extern int fpregs_get(struct task_struct *target, |
| 39 | const struct user_regset *regset, | |
| 40 | unsigned int pos, unsigned int count, | |
| 41 | void *kbuf, void __user *ubuf); | |
| 42 | ||
| 9bbafce2 PM |
43 | static inline void unlazy_fpu(struct task_struct *tsk, struct pt_regs *regs) |
| 44 | { | |
| 45 | preempt_disable(); | |
| 46 | if (test_tsk_thread_flag(tsk, TIF_USEDFPU)) | |
| 47 | save_fpu(tsk, regs); | |
| a0458b07 GC |
48 | else |
| 49 | tsk->fpu_counter = 0; | |
| 9bbafce2 PM |
50 | preempt_enable(); |
| 51 | } | |
| 52 | ||
| 53 | static inline void clear_fpu(struct task_struct *tsk, struct pt_regs *regs) | |
| 54 | { | |
| 55 | preempt_disable(); | |
| 56 | if (test_tsk_thread_flag(tsk, TIF_USEDFPU)) { | |
| 57 | clear_tsk_thread_flag(tsk, TIF_USEDFPU); | |
| 58 | release_fpu(regs); | |
| 59 | } | |
| 60 | preempt_enable(); | |
| 61 | } | |
| 332fd57b | 62 | |
| e7ab3cd2 PM |
63 | static inline int init_fpu(struct task_struct *tsk) |
| 64 | { | |
| 65 | if (tsk_used_math(tsk)) { | |
| 66 | if ((boot_cpu_data.flags & CPU_HAS_FPU) && tsk == current) | |
| 67 | unlazy_fpu(tsk, task_pt_regs(tsk)); | |
| 68 | return 0; | |
| 69 | } | |
| 70 | ||
| 71 | set_stopped_child_used_math(tsk); | |
| 72 | return 0; | |
| 73 | } | |
| 74 | ||
| 332fd57b PM |
75 | #endif /* __ASSEMBLY__ */ |
| 76 | ||
| 77 | #endif /* __ASM_SH_FPU_H */ |