1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ASM_SH_FPU_H
3 #define __ASM_SH_FPU_H
4
5 #ifndef __ASSEMBLY__
6
7 #include <asm/ptrace.h>
8
9 struct task_struct;
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
22 extern void save_fpu(struct task_struct *__tsk);
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);
26 #else
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)
33 #endif
34
35 struct user_regset;
36
37 extern int do_fpu_inst(unsigned short, struct pt_regs *);
38 extern int init_fpu(struct task_struct *);
39
40 static inline void __unlazy_fpu(struct task_struct *tsk, struct pt_regs *regs)
41 {
42 if (task_thread_info(tsk)->status & TS_USEDFPU) {
43 task_thread_info(tsk)->status &= ~TS_USEDFPU;
44 save_fpu(tsk);
45 release_fpu(regs);
46 } else
47 tsk->thread.fpu_counter = 0;
48 }
49
50 static inline void unlazy_fpu(struct task_struct *tsk, struct pt_regs *regs)
51 {
52 preempt_disable();
53 __unlazy_fpu(tsk, regs);
54 preempt_enable();
55 }
56
57 static inline void clear_fpu(struct task_struct *tsk, struct pt_regs *regs)
58 {
59 preempt_disable();
60 if (task_thread_info(tsk)->status & TS_USEDFPU) {
61 task_thread_info(tsk)->status &= ~TS_USEDFPU;
62 release_fpu(regs);
63 }
64 preempt_enable();
65 }
66
67 void float_raise(unsigned int flags);
68 int float_rounding_mode(void);
69
70 #endif /* __ASSEMBLY__ */
71
72 #endif /* __ASM_SH_FPU_H */
73
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