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gerrit-public.fairphone.software / kernel / msm-4.9 / 1434b65731963207a4cc84bd87e6191e34321986 / . / include / asm-sh / fpu.h
blob: 91462fea1507c69af30d42a8e2315e8730ced5b0 [file] [log] [blame]
Paul Mundt332fd572007-11-22 17:30:50 +0900[diff] [blame]1#ifndef __ASM_SH_FPU_H
2#define __ASM_SH_FPU_H
3
Paul Mundt332fd572007-11-22 17:30:50 +0900[diff] [blame]4#ifndef __ASSEMBLY__
Paul Mundt9bbafce2008-03-26 19:02:47 +0900[diff] [blame]5#include <linux/preempt.h>
Paul Mundt332fd572007-11-22 17:30:50 +0900[diff] [blame]6#include <asm/ptrace.h>
7
8#ifdef CONFIG_SH_FPU
9static inline void release_fpu(struct pt_regs *regs)
10{
11 regs->sr |= SR_FD;
12}
13
14static inline void grab_fpu(struct pt_regs *regs)
15{
16 regs->sr &= ~SR_FD;
17}
18
19struct task_struct;
20
21extern void save_fpu(struct task_struct *__tsk, struct pt_regs *regs);
22#else
Paul Mundt138bed12008-03-26 19:09:21 +0900[diff] [blame]23
Paul Mundt332fd572007-11-22 17:30:50 +0900[diff] [blame]24#define release_fpu(regs) do { } while (0)
25#define grab_fpu(regs) do { } while (0)
Paul Mundt138bed12008-03-26 19:09:21 +0900[diff] [blame]26
27static inline void save_fpu(struct task_struct *tsk, struct pt_regs *regs)
28{
29 clear_tsk_thread_flag(tsk, TIF_USEDFPU);
30}
Paul Mundt332fd572007-11-22 17:30:50 +0900[diff] [blame]31#endif
32
Paul Mundt74d99a52007-11-26 20:38:36 +0900[diff] [blame]33extern int do_fpu_inst(unsigned short, struct pt_regs *);
34
Paul Mundt9bbafce2008-03-26 19:02:47 +0900[diff] [blame]35static inline void unlazy_fpu(struct task_struct *tsk, struct pt_regs *regs)
36{
37 preempt_disable();
38 if (test_tsk_thread_flag(tsk, TIF_USEDFPU))
39 save_fpu(tsk, regs);
40 preempt_enable();
41}
Paul Mundt332fd572007-11-22 17:30:50 +0900[diff] [blame]42
Paul Mundt9bbafce2008-03-26 19:02:47 +0900[diff] [blame]43static inline void clear_fpu(struct task_struct *tsk, struct pt_regs *regs)
44{
45 preempt_disable();
46 if (test_tsk_thread_flag(tsk, TIF_USEDFPU)) {
47 clear_tsk_thread_flag(tsk, TIF_USEDFPU);
48 release_fpu(regs);
49 }
50 preempt_enable();
51}
Paul Mundt332fd572007-11-22 17:30:50 +0900[diff] [blame]52
53#endif /* __ASSEMBLY__ */
54
55#endif /* __ASM_SH_FPU_H */