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
9struct task_struct;
10
11#ifdef CONFIG_SH_FPU
12static inline void release_fpu(struct pt_regs *regs)
13{
14	regs->sr |= SR_FD;
15}
16
17static inline void grab_fpu(struct pt_regs *regs)
18{
19	regs->sr &= ~SR_FD;
20}
21
22extern void save_fpu(struct task_struct *__tsk);
23extern void restore_fpu(struct task_struct *__tsk);
24extern void fpu_state_restore(struct pt_regs *regs);
25extern 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
35struct user_regset;
36
37extern int do_fpu_inst(unsigned short, struct pt_regs *);
38extern int init_fpu(struct task_struct *);
39
40static 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
50static 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
57static 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#endif /* __ASSEMBLY__ */
68
69#endif /* __ASM_SH_FPU_H */
70