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1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 1996, 1998 by Ralf Baechle
7 *
8 * Multi-arch abstraction and asm macros for easier reading:
9 * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
10 *
11 * Further modifications to make this work:
12 * Copyright (c) 1998 Harald Koerfgen
13 */
14#include <asm/asm.h>
15#include <asm/asmmacro.h>
16#include <asm/errno.h>
17#include <asm/export.h>
18#include <asm/fpregdef.h>
19#include <asm/mipsregs.h>
20#include <asm/asm-offsets.h>
21#include <asm/regdef.h>
22
23#define EX(a,b) \
249: a,##b; \
25 .section __ex_table,"a"; \
26 PTR 9b,fault; \
27 .previous
28
29#define EX2(a,b) \
309: a,##b; \
31 .section __ex_table,"a"; \
32 PTR 9b,bad_stack; \
33 PTR 9b+4,bad_stack; \
34 .previous
35
36 .set mips1
37
38/*
39 * Save a thread's fp context.
40 */
41LEAF(_save_fp)
42EXPORT_SYMBOL(_save_fp)
43 fpu_save_single a0, t1 # clobbers t1
44 jr ra
45 END(_save_fp)
46
47/*
48 * Restore a thread's fp context.
49 */
50LEAF(_restore_fp)
51 fpu_restore_single a0, t1 # clobbers t1
52 jr ra
53 END(_restore_fp)
54
55 .set noreorder
56
57/**
58 * _save_fp_context() - save FP context from the FPU
59 * @a0 - pointer to fpregs field of sigcontext
60 * @a1 - pointer to fpc_csr field of sigcontext
61 *
62 * Save FP context, including the 32 FP data registers and the FP
63 * control & status register, from the FPU to signal context.
64 */
65LEAF(_save_fp_context)
66 .set push
67 SET_HARDFLOAT
68 li v0, 0 # assume success
69 cfc1 t1, fcr31
70 EX2(s.d $f0, 0(a0))
71 EX2(s.d $f2, 16(a0))
72 EX2(s.d $f4, 32(a0))
73 EX2(s.d $f6, 48(a0))
74 EX2(s.d $f8, 64(a0))
75 EX2(s.d $f10, 80(a0))
76 EX2(s.d $f12, 96(a0))
77 EX2(s.d $f14, 112(a0))
78 EX2(s.d $f16, 128(a0))
79 EX2(s.d $f18, 144(a0))
80 EX2(s.d $f20, 160(a0))
81 EX2(s.d $f22, 176(a0))
82 EX2(s.d $f24, 192(a0))
83 EX2(s.d $f26, 208(a0))
84 EX2(s.d $f28, 224(a0))
85 EX2(s.d $f30, 240(a0))
86 jr ra
87 EX(sw t1, (a1))
88 .set pop
89 END(_save_fp_context)
90
91/**
92 * _restore_fp_context() - restore FP context to the FPU
93 * @a0 - pointer to fpregs field of sigcontext
94 * @a1 - pointer to fpc_csr field of sigcontext
95 *
96 * Restore FP context, including the 32 FP data registers and the FP
97 * control & status register, from signal context to the FPU.
98 */
99LEAF(_restore_fp_context)
100 .set push
101 SET_HARDFLOAT
102 li v0, 0 # assume success
103 EX(lw t0, (a1))
104 EX2(l.d $f0, 0(a0))
105 EX2(l.d $f2, 16(a0))
106 EX2(l.d $f4, 32(a0))
107 EX2(l.d $f6, 48(a0))
108 EX2(l.d $f8, 64(a0))
109 EX2(l.d $f10, 80(a0))
110 EX2(l.d $f12, 96(a0))
111 EX2(l.d $f14, 112(a0))
112 EX2(l.d $f16, 128(a0))
113 EX2(l.d $f18, 144(a0))
114 EX2(l.d $f20, 160(a0))
115 EX2(l.d $f22, 176(a0))
116 EX2(l.d $f24, 192(a0))
117 EX2(l.d $f26, 208(a0))
118 EX2(l.d $f28, 224(a0))
119 EX2(l.d $f30, 240(a0))
120 jr ra
121 ctc1 t0, fcr31
122 .set pop
123 END(_restore_fp_context)
124 .set reorder
125
126 .type fault, @function
127 .ent fault
128fault: li v0, -EFAULT
129 jr ra
130 .end fault
1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 1996, 1998 by Ralf Baechle
7 *
8 * Multi-arch abstraction and asm macros for easier reading:
9 * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
10 *
11 * Further modifications to make this work:
12 * Copyright (c) 1998 Harald Koerfgen
13 */
14#include <asm/asm.h>
15#include <asm/errno.h>
16#include <asm/fpregdef.h>
17#include <asm/mipsregs.h>
18#include <asm/asm-offsets.h>
19#include <asm/regdef.h>
20
21#define EX(a,b) \
229: a,##b; \
23 .section __ex_table,"a"; \
24 PTR 9b,fault; \
25 .previous
26
27#define EX2(a,b) \
289: a,##b; \
29 .section __ex_table,"a"; \
30 PTR 9b,bad_stack; \
31 PTR 9b+4,bad_stack; \
32 .previous
33
34 .set noreorder
35 .set mips1
36
37/**
38 * _save_fp_context() - save FP context from the FPU
39 * @a0 - pointer to fpregs field of sigcontext
40 * @a1 - pointer to fpc_csr field of sigcontext
41 *
42 * Save FP context, including the 32 FP data registers and the FP
43 * control & status register, from the FPU to signal context.
44 */
45LEAF(_save_fp_context)
46 .set push
47 SET_HARDFLOAT
48 li v0, 0 # assume success
49 cfc1 t1, fcr31
50 EX2(s.d $f0, 0(a0))
51 EX2(s.d $f2, 16(a0))
52 EX2(s.d $f4, 32(a0))
53 EX2(s.d $f6, 48(a0))
54 EX2(s.d $f8, 64(a0))
55 EX2(s.d $f10, 80(a0))
56 EX2(s.d $f12, 96(a0))
57 EX2(s.d $f14, 112(a0))
58 EX2(s.d $f16, 128(a0))
59 EX2(s.d $f18, 144(a0))
60 EX2(s.d $f20, 160(a0))
61 EX2(s.d $f22, 176(a0))
62 EX2(s.d $f24, 192(a0))
63 EX2(s.d $f26, 208(a0))
64 EX2(s.d $f28, 224(a0))
65 EX2(s.d $f30, 240(a0))
66 jr ra
67 EX(sw t1, (a1))
68 .set pop
69 END(_save_fp_context)
70
71/**
72 * _restore_fp_context() - restore FP context to the FPU
73 * @a0 - pointer to fpregs field of sigcontext
74 * @a1 - pointer to fpc_csr field of sigcontext
75 *
76 * Restore FP context, including the 32 FP data registers and the FP
77 * control & status register, from signal context to the FPU.
78 */
79LEAF(_restore_fp_context)
80 .set push
81 SET_HARDFLOAT
82 li v0, 0 # assume success
83 EX(lw t0, (a1))
84 EX2(l.d $f0, 0(a0))
85 EX2(l.d $f2, 16(a0))
86 EX2(l.d $f4, 32(a0))
87 EX2(l.d $f6, 48(a0))
88 EX2(l.d $f8, 64(a0))
89 EX2(l.d $f10, 80(a0))
90 EX2(l.d $f12, 96(a0))
91 EX2(l.d $f14, 112(a0))
92 EX2(l.d $f16, 128(a0))
93 EX2(l.d $f18, 144(a0))
94 EX2(l.d $f20, 160(a0))
95 EX2(l.d $f22, 176(a0))
96 EX2(l.d $f24, 192(a0))
97 EX2(l.d $f26, 208(a0))
98 EX2(l.d $f28, 224(a0))
99 EX2(l.d $f30, 240(a0))
100 jr ra
101 ctc1 t0, fcr31
102 .set pop
103 END(_restore_fp_context)
104 .set reorder
105
106 .type fault, @function
107 .ent fault
108fault: li v0, -EFAULT
109 jr ra
110 .end fault