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-rw-r--r--include/asm-mips/fpu.h153
1 files changed, 0 insertions, 153 deletions
diff --git a/include/asm-mips/fpu.h b/include/asm-mips/fpu.h
deleted file mode 100644
index 8a3ef247659a..000000000000
--- a/include/asm-mips/fpu.h
+++ /dev/null
@@ -1,153 +0,0 @@
1/*
2 * Copyright (C) 2002 MontaVista Software Inc.
3 * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version.
9 */
10#ifndef _ASM_FPU_H
11#define _ASM_FPU_H
12
13#include <linux/sched.h>
14#include <linux/thread_info.h>
15#include <linux/bitops.h>
16
17#include <asm/mipsregs.h>
18#include <asm/cpu.h>
19#include <asm/cpu-features.h>
20#include <asm/hazards.h>
21#include <asm/processor.h>
22#include <asm/current.h>
23
24#ifdef CONFIG_MIPS_MT_FPAFF
25#include <asm/mips_mt.h>
26#endif
27
28struct sigcontext;
29struct sigcontext32;
30
31extern asmlinkage int (*save_fp_context)(struct sigcontext __user *sc);
32extern asmlinkage int (*restore_fp_context)(struct sigcontext __user *sc);
33
34extern asmlinkage int (*save_fp_context32)(struct sigcontext32 __user *sc);
35extern asmlinkage int (*restore_fp_context32)(struct sigcontext32 __user *sc);
36
37extern void fpu_emulator_init_fpu(void);
38extern int fpu_emulator_save_context(struct sigcontext __user *sc);
39extern int fpu_emulator_restore_context(struct sigcontext __user *sc);
40extern void _init_fpu(void);
41extern void _save_fp(struct task_struct *);
42extern void _restore_fp(struct task_struct *);
43
44#define __enable_fpu() \
45do { \
46 set_c0_status(ST0_CU1); \
47 enable_fpu_hazard(); \
48} while (0)
49
50#define __disable_fpu() \
51do { \
52 clear_c0_status(ST0_CU1); \
53 disable_fpu_hazard(); \
54} while (0)
55
56#define enable_fpu() \
57do { \
58 if (cpu_has_fpu) \
59 __enable_fpu(); \
60} while (0)
61
62#define disable_fpu() \
63do { \
64 if (cpu_has_fpu) \
65 __disable_fpu(); \
66} while (0)
67
68
69#define clear_fpu_owner() clear_thread_flag(TIF_USEDFPU)
70
71static inline int __is_fpu_owner(void)
72{
73 return test_thread_flag(TIF_USEDFPU);
74}
75
76static inline int is_fpu_owner(void)
77{
78 return cpu_has_fpu && __is_fpu_owner();
79}
80
81static inline void __own_fpu(void)
82{
83 __enable_fpu();
84 KSTK_STATUS(current) |= ST0_CU1;
85 set_thread_flag(TIF_USEDFPU);
86}
87
88static inline void own_fpu_inatomic(int restore)
89{
90 if (cpu_has_fpu && !__is_fpu_owner()) {
91 __own_fpu();
92 if (restore)
93 _restore_fp(current);
94 }
95}
96
97static inline void own_fpu(int restore)
98{
99 preempt_disable();
100 own_fpu_inatomic(restore);
101 preempt_enable();
102}
103
104static inline void lose_fpu(int save)
105{
106 preempt_disable();
107 if (is_fpu_owner()) {
108 if (save)
109 _save_fp(current);
110 KSTK_STATUS(current) &= ~ST0_CU1;
111 clear_thread_flag(TIF_USEDFPU);
112 __disable_fpu();
113 }
114 preempt_enable();
115}
116
117static inline void init_fpu(void)
118{
119 preempt_disable();
120 if (cpu_has_fpu) {
121 __own_fpu();
122 _init_fpu();
123 } else {
124 fpu_emulator_init_fpu();
125 }
126 preempt_enable();
127}
128
129static inline void save_fp(struct task_struct *tsk)
130{
131 if (cpu_has_fpu)
132 _save_fp(tsk);
133}
134
135static inline void restore_fp(struct task_struct *tsk)
136{
137 if (cpu_has_fpu)
138 _restore_fp(tsk);
139}
140
141static inline fpureg_t *get_fpu_regs(struct task_struct *tsk)
142{
143 if (tsk == current) {
144 preempt_disable();
145 if (is_fpu_owner())
146 _save_fp(current);
147 preempt_enable();
148 }
149
150 return tsk->thread.fpu.fpr;
151}
152
153#endif /* _ASM_FPU_H */
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