projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 332fd57b PM |
2 | #ifndef __ASM_SH_FPU_H |
| 3 | #define __ASM_SH_FPU_H | |
| 4 | ||
| 332fd57b | 5 | #ifndef __ASSEMBLY__ |
| 0ea820cf | 6 | |
| f780d89a IM |
7 | #include <asm/ptrace.h> |
| 8 | ||
| 0ea820cf | 9 | struct task_struct; |
| 332fd57b PM |
10 | |
| 11 | #ifdef CONFIG_SH_FPU | |
| 12 | static inline void release_fpu(struct pt_regs *regs) | |
| 13 | { | |
| 14 | regs->sr |= SR_FD; | |
| 15 | } | |
| 16 | ||
| 17 | static inline void grab_fpu(struct pt_regs *regs) | |
| 18 | { | |
| 19 | regs->sr &= ~SR_FD; | |
| 20 | } | |
| 21 | ||
| d3ea9fa0 | 22 | extern void save_fpu(struct task_struct *__tsk); |
| 0ea820cf PM |
23 | extern void restore_fpu(struct task_struct *__tsk); |
| 24 | extern void fpu_state_restore(struct pt_regs *regs); | |
| 25 | extern void __fpu_state_restore(void); | |
| 332fd57b | 26 | #else |
| 0ea820cf PM |
27 | #define save_fpu(tsk) do { } while (0) |
| 28 | #define restore_fpu(tsk) do { } while (0) | |
| 29 | #define release_fpu(regs) do { } while (0) | |
| 30 | #define grab_fpu(regs) do { } while (0) | |
| 31 | #define fpu_state_restore(regs) do { } while (0) | |
| 32 | #define __fpu_state_restore(regs) do { } while (0) | |
| 332fd57b PM |
33 | #endif |
| 34 | ||
| e7ab3cd2 PM |
35 | struct user_regset; |
| 36 | ||
| 74d99a5e | 37 | extern int do_fpu_inst(unsigned short, struct pt_regs *); |
| 0ea820cf | 38 | extern int init_fpu(struct task_struct *); |
| 74d99a5e | 39 | |
| e7ab3cd2 PM |
40 | extern int fpregs_get(struct task_struct *target, |
| 41 | const struct user_regset *regset, | |
| 42 | unsigned int pos, unsigned int count, | |
| 43 | void *kbuf, void __user *ubuf); | |
| 44 | ||
| d3ea9fa0 SM |
45 | static inline void __unlazy_fpu(struct task_struct *tsk, struct pt_regs *regs) |
| 46 | { | |
| 47 | if (task_thread_info(tsk)->status & TS_USEDFPU) { | |
| 48 | task_thread_info(tsk)->status &= ~TS_USEDFPU; | |
| 49 | save_fpu(tsk); | |
| 50 | release_fpu(regs); | |
| 51 | } else | |
| 616c05d1 | 52 | tsk->thread.fpu_counter = 0; |
| d3ea9fa0 SM |
53 | } |
| 54 | ||
| 9bbafce2 PM |
55 | static inline void unlazy_fpu(struct task_struct *tsk, struct pt_regs *regs) |
| 56 | { | |
| 57 | preempt_disable(); | |
| d3ea9fa0 | 58 | __unlazy_fpu(tsk, regs); |
| 9bbafce2 PM |
59 | preempt_enable(); |
| 60 | } | |
| 61 | ||
| 62 | static inline void clear_fpu(struct task_struct *tsk, struct pt_regs *regs) | |
| 63 | { | |
| 64 | preempt_disable(); | |
| d3ea9fa0 SM |
65 | if (task_thread_info(tsk)->status & TS_USEDFPU) { |
| 66 | task_thread_info(tsk)->status &= ~TS_USEDFPU; | |
| 9bbafce2 PM |
67 | release_fpu(regs); |
| 68 | } | |
| 69 | preempt_enable(); | |
| 70 | } | |
| 332fd57b PM |
71 | |
| 72 | #endif /* __ASSEMBLY__ */ | |
| 73 | ||
| 74 | #endif /* __ASM_SH_FPU_H */ |