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1da177e4 LT |
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, 98, 99, 2000, 01 Ralf Baechle | |
7 | * | |
8 | * Multi-arch abstraction and asm macros for easier reading: | |
9 | * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com) | |
10 | * | |
11 | * Carsten Langgaard, carstenl@mips.com | |
12 | * Copyright (C) 2000 MIPS Technologies, Inc. | |
13 | * Copyright (C) 1999, 2001 Silicon Graphics, Inc. | |
14 | */ | |
15 | #include <linux/config.h> | |
16 | #include <asm/asm.h> | |
17 | #include <asm/errno.h> | |
18 | #include <asm/fpregdef.h> | |
19 | #include <asm/mipsregs.h> | |
20 | #include <asm/offset.h> | |
21 | #include <asm/regdef.h> | |
22 | ||
23 | .macro EX insn, reg, src | |
24 | .set push | |
25 | .set nomacro | |
26 | .ex\@: \insn \reg, \src | |
27 | .set pop | |
28 | .section __ex_table,"a" | |
29 | PTR .ex\@, fault | |
30 | .previous | |
31 | .endm | |
32 | ||
33 | .set noreorder | |
34 | .set mips3 | |
35 | /* Save floating point context */ | |
36 | LEAF(_save_fp_context) | |
37 | cfc1 t1, fcr31 | |
38 | ||
875d43e7 | 39 | #ifdef CONFIG_64BIT |
1da177e4 LT |
40 | /* Store the 16 odd double precision registers */ |
41 | EX sdc1 $f1, SC_FPREGS+8(a0) | |
42 | EX sdc1 $f3, SC_FPREGS+24(a0) | |
43 | EX sdc1 $f5, SC_FPREGS+40(a0) | |
44 | EX sdc1 $f7, SC_FPREGS+56(a0) | |
45 | EX sdc1 $f9, SC_FPREGS+72(a0) | |
46 | EX sdc1 $f11, SC_FPREGS+88(a0) | |
47 | EX sdc1 $f13, SC_FPREGS+104(a0) | |
48 | EX sdc1 $f15, SC_FPREGS+120(a0) | |
49 | EX sdc1 $f17, SC_FPREGS+136(a0) | |
50 | EX sdc1 $f19, SC_FPREGS+152(a0) | |
51 | EX sdc1 $f21, SC_FPREGS+168(a0) | |
52 | EX sdc1 $f23, SC_FPREGS+184(a0) | |
53 | EX sdc1 $f25, SC_FPREGS+200(a0) | |
54 | EX sdc1 $f27, SC_FPREGS+216(a0) | |
55 | EX sdc1 $f29, SC_FPREGS+232(a0) | |
56 | EX sdc1 $f31, SC_FPREGS+248(a0) | |
57 | #endif | |
58 | ||
59 | /* Store the 16 even double precision registers */ | |
60 | EX sdc1 $f0, SC_FPREGS+0(a0) | |
61 | EX sdc1 $f2, SC_FPREGS+16(a0) | |
62 | EX sdc1 $f4, SC_FPREGS+32(a0) | |
63 | EX sdc1 $f6, SC_FPREGS+48(a0) | |
64 | EX sdc1 $f8, SC_FPREGS+64(a0) | |
65 | EX sdc1 $f10, SC_FPREGS+80(a0) | |
66 | EX sdc1 $f12, SC_FPREGS+96(a0) | |
67 | EX sdc1 $f14, SC_FPREGS+112(a0) | |
68 | EX sdc1 $f16, SC_FPREGS+128(a0) | |
69 | EX sdc1 $f18, SC_FPREGS+144(a0) | |
70 | EX sdc1 $f20, SC_FPREGS+160(a0) | |
71 | EX sdc1 $f22, SC_FPREGS+176(a0) | |
72 | EX sdc1 $f24, SC_FPREGS+192(a0) | |
73 | EX sdc1 $f26, SC_FPREGS+208(a0) | |
74 | EX sdc1 $f28, SC_FPREGS+224(a0) | |
75 | EX sdc1 $f30, SC_FPREGS+240(a0) | |
76 | EX sw t1, SC_FPC_CSR(a0) | |
77 | cfc1 t0, $0 # implementation/version | |
78 | EX sw t0, SC_FPC_EIR(a0) | |
79 | ||
80 | jr ra | |
81 | li v0, 0 # success | |
82 | END(_save_fp_context) | |
83 | ||
84 | #ifdef CONFIG_MIPS32_COMPAT | |
85 | /* Save 32-bit process floating point context */ | |
86 | LEAF(_save_fp_context32) | |
87 | cfc1 t1, fcr31 | |
88 | ||
89 | EX sdc1 $f0, SC32_FPREGS+0(a0) | |
90 | EX sdc1 $f2, SC32_FPREGS+16(a0) | |
91 | EX sdc1 $f4, SC32_FPREGS+32(a0) | |
92 | EX sdc1 $f6, SC32_FPREGS+48(a0) | |
93 | EX sdc1 $f8, SC32_FPREGS+64(a0) | |
94 | EX sdc1 $f10, SC32_FPREGS+80(a0) | |
95 | EX sdc1 $f12, SC32_FPREGS+96(a0) | |
96 | EX sdc1 $f14, SC32_FPREGS+112(a0) | |
97 | EX sdc1 $f16, SC32_FPREGS+128(a0) | |
98 | EX sdc1 $f18, SC32_FPREGS+144(a0) | |
99 | EX sdc1 $f20, SC32_FPREGS+160(a0) | |
100 | EX sdc1 $f22, SC32_FPREGS+176(a0) | |
101 | EX sdc1 $f24, SC32_FPREGS+192(a0) | |
102 | EX sdc1 $f26, SC32_FPREGS+208(a0) | |
103 | EX sdc1 $f28, SC32_FPREGS+224(a0) | |
104 | EX sdc1 $f30, SC32_FPREGS+240(a0) | |
105 | EX sw t1, SC32_FPC_CSR(a0) | |
106 | cfc1 t0, $0 # implementation/version | |
107 | EX sw t0, SC32_FPC_EIR(a0) | |
108 | ||
109 | jr ra | |
110 | li v0, 0 # success | |
111 | END(_save_fp_context32) | |
112 | #endif | |
113 | ||
114 | /* | |
115 | * Restore FPU state: | |
116 | * - fp gp registers | |
117 | * - cp1 status/control register | |
118 | */ | |
119 | LEAF(_restore_fp_context) | |
120 | EX lw t0, SC_FPC_CSR(a0) | |
875d43e7 | 121 | #ifdef CONFIG_64BIT |
1da177e4 LT |
122 | EX ldc1 $f1, SC_FPREGS+8(a0) |
123 | EX ldc1 $f3, SC_FPREGS+24(a0) | |
124 | EX ldc1 $f5, SC_FPREGS+40(a0) | |
125 | EX ldc1 $f7, SC_FPREGS+56(a0) | |
126 | EX ldc1 $f9, SC_FPREGS+72(a0) | |
127 | EX ldc1 $f11, SC_FPREGS+88(a0) | |
128 | EX ldc1 $f13, SC_FPREGS+104(a0) | |
129 | EX ldc1 $f15, SC_FPREGS+120(a0) | |
130 | EX ldc1 $f17, SC_FPREGS+136(a0) | |
131 | EX ldc1 $f19, SC_FPREGS+152(a0) | |
132 | EX ldc1 $f21, SC_FPREGS+168(a0) | |
133 | EX ldc1 $f23, SC_FPREGS+184(a0) | |
134 | EX ldc1 $f25, SC_FPREGS+200(a0) | |
135 | EX ldc1 $f27, SC_FPREGS+216(a0) | |
136 | EX ldc1 $f29, SC_FPREGS+232(a0) | |
137 | EX ldc1 $f31, SC_FPREGS+248(a0) | |
138 | #endif | |
139 | EX ldc1 $f0, SC_FPREGS+0(a0) | |
140 | EX ldc1 $f2, SC_FPREGS+16(a0) | |
141 | EX ldc1 $f4, SC_FPREGS+32(a0) | |
142 | EX ldc1 $f6, SC_FPREGS+48(a0) | |
143 | EX ldc1 $f8, SC_FPREGS+64(a0) | |
144 | EX ldc1 $f10, SC_FPREGS+80(a0) | |
145 | EX ldc1 $f12, SC_FPREGS+96(a0) | |
146 | EX ldc1 $f14, SC_FPREGS+112(a0) | |
147 | EX ldc1 $f16, SC_FPREGS+128(a0) | |
148 | EX ldc1 $f18, SC_FPREGS+144(a0) | |
149 | EX ldc1 $f20, SC_FPREGS+160(a0) | |
150 | EX ldc1 $f22, SC_FPREGS+176(a0) | |
151 | EX ldc1 $f24, SC_FPREGS+192(a0) | |
152 | EX ldc1 $f26, SC_FPREGS+208(a0) | |
153 | EX ldc1 $f28, SC_FPREGS+224(a0) | |
154 | EX ldc1 $f30, SC_FPREGS+240(a0) | |
155 | ctc1 t0, fcr31 | |
156 | jr ra | |
157 | li v0, 0 # success | |
158 | END(_restore_fp_context) | |
159 | ||
160 | #ifdef CONFIG_MIPS32_COMPAT | |
161 | LEAF(_restore_fp_context32) | |
162 | /* Restore an o32 sigcontext. */ | |
163 | EX lw t0, SC32_FPC_CSR(a0) | |
164 | EX ldc1 $f0, SC32_FPREGS+0(a0) | |
165 | EX ldc1 $f2, SC32_FPREGS+16(a0) | |
166 | EX ldc1 $f4, SC32_FPREGS+32(a0) | |
167 | EX ldc1 $f6, SC32_FPREGS+48(a0) | |
168 | EX ldc1 $f8, SC32_FPREGS+64(a0) | |
169 | EX ldc1 $f10, SC32_FPREGS+80(a0) | |
170 | EX ldc1 $f12, SC32_FPREGS+96(a0) | |
171 | EX ldc1 $f14, SC32_FPREGS+112(a0) | |
172 | EX ldc1 $f16, SC32_FPREGS+128(a0) | |
173 | EX ldc1 $f18, SC32_FPREGS+144(a0) | |
174 | EX ldc1 $f20, SC32_FPREGS+160(a0) | |
175 | EX ldc1 $f22, SC32_FPREGS+176(a0) | |
176 | EX ldc1 $f24, SC32_FPREGS+192(a0) | |
177 | EX ldc1 $f26, SC32_FPREGS+208(a0) | |
178 | EX ldc1 $f28, SC32_FPREGS+224(a0) | |
179 | EX ldc1 $f30, SC32_FPREGS+240(a0) | |
180 | ctc1 t0, fcr31 | |
181 | jr ra | |
182 | li v0, 0 # success | |
183 | END(_restore_fp_context32) | |
184 | .set reorder | |
185 | #endif | |
186 | ||
187 | .type fault@function | |
188 | .ent fault | |
189 | fault: li v0, -EFAULT # failure | |
190 | jr ra | |
191 | .end fault |