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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/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,bad_stack; \
25 .previous
26
27 .set noreorder
28 .set mips1
29 /* Save floating point context */
30LEAF(_save_fp_context)
31 li v0, 0 # assume success
32 cfc1 t1,fcr31
33 EX(swc1 $f0,(SC_FPREGS+0)(a0))
34 EX(swc1 $f1,(SC_FPREGS+8)(a0))
35 EX(swc1 $f2,(SC_FPREGS+16)(a0))
36 EX(swc1 $f3,(SC_FPREGS+24)(a0))
37 EX(swc1 $f4,(SC_FPREGS+32)(a0))
38 EX(swc1 $f5,(SC_FPREGS+40)(a0))
39 EX(swc1 $f6,(SC_FPREGS+48)(a0))
40 EX(swc1 $f7,(SC_FPREGS+56)(a0))
41 EX(swc1 $f8,(SC_FPREGS+64)(a0))
42 EX(swc1 $f9,(SC_FPREGS+72)(a0))
43 EX(swc1 $f10,(SC_FPREGS+80)(a0))
44 EX(swc1 $f11,(SC_FPREGS+88)(a0))
45 EX(swc1 $f12,(SC_FPREGS+96)(a0))
46 EX(swc1 $f13,(SC_FPREGS+104)(a0))
47 EX(swc1 $f14,(SC_FPREGS+112)(a0))
48 EX(swc1 $f15,(SC_FPREGS+120)(a0))
49 EX(swc1 $f16,(SC_FPREGS+128)(a0))
50 EX(swc1 $f17,(SC_FPREGS+136)(a0))
51 EX(swc1 $f18,(SC_FPREGS+144)(a0))
52 EX(swc1 $f19,(SC_FPREGS+152)(a0))
53 EX(swc1 $f20,(SC_FPREGS+160)(a0))
54 EX(swc1 $f21,(SC_FPREGS+168)(a0))
55 EX(swc1 $f22,(SC_FPREGS+176)(a0))
56 EX(swc1 $f23,(SC_FPREGS+184)(a0))
57 EX(swc1 $f24,(SC_FPREGS+192)(a0))
58 EX(swc1 $f25,(SC_FPREGS+200)(a0))
59 EX(swc1 $f26,(SC_FPREGS+208)(a0))
60 EX(swc1 $f27,(SC_FPREGS+216)(a0))
61 EX(swc1 $f28,(SC_FPREGS+224)(a0))
62 EX(swc1 $f29,(SC_FPREGS+232)(a0))
63 EX(swc1 $f30,(SC_FPREGS+240)(a0))
64 EX(swc1 $f31,(SC_FPREGS+248)(a0))
65 EX(sw t1,(SC_FPC_CSR)(a0))
66 cfc1 t0,$0 # implementation/version
67 jr ra
68 .set nomacro
69 EX(sw t0,(SC_FPC_EIR)(a0))
70 .set macro
71 END(_save_fp_context)
72
73/*
74 * Restore FPU state:
75 * - fp gp registers
76 * - cp1 status/control register
77 *
78 * We base the decision which registers to restore from the signal stack
79 * frame on the current content of c0_status, not on the content of the
80 * stack frame which might have been changed by the user.
81 */
82LEAF(_restore_fp_context)
83 li v0, 0 # assume success
84 EX(lw t0,(SC_FPC_CSR)(a0))
85 EX(lwc1 $f0,(SC_FPREGS+0)(a0))
86 EX(lwc1 $f1,(SC_FPREGS+8)(a0))
87 EX(lwc1 $f2,(SC_FPREGS+16)(a0))
88 EX(lwc1 $f3,(SC_FPREGS+24)(a0))
89 EX(lwc1 $f4,(SC_FPREGS+32)(a0))
90 EX(lwc1 $f5,(SC_FPREGS+40)(a0))
91 EX(lwc1 $f6,(SC_FPREGS+48)(a0))
92 EX(lwc1 $f7,(SC_FPREGS+56)(a0))
93 EX(lwc1 $f8,(SC_FPREGS+64)(a0))
94 EX(lwc1 $f9,(SC_FPREGS+72)(a0))
95 EX(lwc1 $f10,(SC_FPREGS+80)(a0))
96 EX(lwc1 $f11,(SC_FPREGS+88)(a0))
97 EX(lwc1 $f12,(SC_FPREGS+96)(a0))
98 EX(lwc1 $f13,(SC_FPREGS+104)(a0))
99 EX(lwc1 $f14,(SC_FPREGS+112)(a0))
100 EX(lwc1 $f15,(SC_FPREGS+120)(a0))
101 EX(lwc1 $f16,(SC_FPREGS+128)(a0))
102 EX(lwc1 $f17,(SC_FPREGS+136)(a0))
103 EX(lwc1 $f18,(SC_FPREGS+144)(a0))
104 EX(lwc1 $f19,(SC_FPREGS+152)(a0))
105 EX(lwc1 $f20,(SC_FPREGS+160)(a0))
106 EX(lwc1 $f21,(SC_FPREGS+168)(a0))
107 EX(lwc1 $f22,(SC_FPREGS+176)(a0))
108 EX(lwc1 $f23,(SC_FPREGS+184)(a0))
109 EX(lwc1 $f24,(SC_FPREGS+192)(a0))
110 EX(lwc1 $f25,(SC_FPREGS+200)(a0))
111 EX(lwc1 $f26,(SC_FPREGS+208)(a0))
112 EX(lwc1 $f27,(SC_FPREGS+216)(a0))
113 EX(lwc1 $f28,(SC_FPREGS+224)(a0))
114 EX(lwc1 $f29,(SC_FPREGS+232)(a0))
115 EX(lwc1 $f30,(SC_FPREGS+240)(a0))
116 EX(lwc1 $f31,(SC_FPREGS+248)(a0))
117 jr ra
118 ctc1 t0,fcr31
119 END(_restore_fp_context)
120 .set reorder
121
122 .type fault@function
123 .ent fault
124fault: li v0, -EFAULT
125 jr ra
126 .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,bad_stack; \
25 .previous
26
27 .set noreorder
28 .set mips1
29 /* Save floating point context */
30LEAF(_save_fp_context)
31 li v0, 0 # assume success
32 cfc1 t1,fcr31
33 EX(swc1 $f0,(SC_FPREGS+0)(a0))
34 EX(swc1 $f1,(SC_FPREGS+8)(a0))
35 EX(swc1 $f2,(SC_FPREGS+16)(a0))
36 EX(swc1 $f3,(SC_FPREGS+24)(a0))
37 EX(swc1 $f4,(SC_FPREGS+32)(a0))
38 EX(swc1 $f5,(SC_FPREGS+40)(a0))
39 EX(swc1 $f6,(SC_FPREGS+48)(a0))
40 EX(swc1 $f7,(SC_FPREGS+56)(a0))
41 EX(swc1 $f8,(SC_FPREGS+64)(a0))
42 EX(swc1 $f9,(SC_FPREGS+72)(a0))
43 EX(swc1 $f10,(SC_FPREGS+80)(a0))
44 EX(swc1 $f11,(SC_FPREGS+88)(a0))
45 EX(swc1 $f12,(SC_FPREGS+96)(a0))
46 EX(swc1 $f13,(SC_FPREGS+104)(a0))
47 EX(swc1 $f14,(SC_FPREGS+112)(a0))
48 EX(swc1 $f15,(SC_FPREGS+120)(a0))
49 EX(swc1 $f16,(SC_FPREGS+128)(a0))
50 EX(swc1 $f17,(SC_FPREGS+136)(a0))
51 EX(swc1 $f18,(SC_FPREGS+144)(a0))
52 EX(swc1 $f19,(SC_FPREGS+152)(a0))
53 EX(swc1 $f20,(SC_FPREGS+160)(a0))
54 EX(swc1 $f21,(SC_FPREGS+168)(a0))
55 EX(swc1 $f22,(SC_FPREGS+176)(a0))
56 EX(swc1 $f23,(SC_FPREGS+184)(a0))
57 EX(swc1 $f24,(SC_FPREGS+192)(a0))
58 EX(swc1 $f25,(SC_FPREGS+200)(a0))
59 EX(swc1 $f26,(SC_FPREGS+208)(a0))
60 EX(swc1 $f27,(SC_FPREGS+216)(a0))
61 EX(swc1 $f28,(SC_FPREGS+224)(a0))
62 EX(swc1 $f29,(SC_FPREGS+232)(a0))
63 EX(swc1 $f30,(SC_FPREGS+240)(a0))
64 EX(swc1 $f31,(SC_FPREGS+248)(a0))
65 EX(sw t1,(SC_FPC_CSR)(a0))
66 cfc1 t0,$0 # implementation/version
67 jr ra
68 .set nomacro
69 EX(sw t0,(SC_FPC_EIR)(a0))
70 .set macro
71 END(_save_fp_context)
72
73/*
74 * Restore FPU state:
75 * - fp gp registers
76 * - cp1 status/control register
77 *
78 * We base the decision which registers to restore from the signal stack
79 * frame on the current content of c0_status, not on the content of the
80 * stack frame which might have been changed by the user.
81 */
82LEAF(_restore_fp_context)
83 li v0, 0 # assume success
84 EX(lw t0,(SC_FPC_CSR)(a0))
85 EX(lwc1 $f0,(SC_FPREGS+0)(a0))
86 EX(lwc1 $f1,(SC_FPREGS+8)(a0))
87 EX(lwc1 $f2,(SC_FPREGS+16)(a0))
88 EX(lwc1 $f3,(SC_FPREGS+24)(a0))
89 EX(lwc1 $f4,(SC_FPREGS+32)(a0))
90 EX(lwc1 $f5,(SC_FPREGS+40)(a0))
91 EX(lwc1 $f6,(SC_FPREGS+48)(a0))
92 EX(lwc1 $f7,(SC_FPREGS+56)(a0))
93 EX(lwc1 $f8,(SC_FPREGS+64)(a0))
94 EX(lwc1 $f9,(SC_FPREGS+72)(a0))
95 EX(lwc1 $f10,(SC_FPREGS+80)(a0))
96 EX(lwc1 $f11,(SC_FPREGS+88)(a0))
97 EX(lwc1 $f12,(SC_FPREGS+96)(a0))
98 EX(lwc1 $f13,(SC_FPREGS+104)(a0))
99 EX(lwc1 $f14,(SC_FPREGS+112)(a0))
100 EX(lwc1 $f15,(SC_FPREGS+120)(a0))
101 EX(lwc1 $f16,(SC_FPREGS+128)(a0))
102 EX(lwc1 $f17,(SC_FPREGS+136)(a0))
103 EX(lwc1 $f18,(SC_FPREGS+144)(a0))
104 EX(lwc1 $f19,(SC_FPREGS+152)(a0))
105 EX(lwc1 $f20,(SC_FPREGS+160)(a0))
106 EX(lwc1 $f21,(SC_FPREGS+168)(a0))
107 EX(lwc1 $f22,(SC_FPREGS+176)(a0))
108 EX(lwc1 $f23,(SC_FPREGS+184)(a0))
109 EX(lwc1 $f24,(SC_FPREGS+192)(a0))
110 EX(lwc1 $f25,(SC_FPREGS+200)(a0))
111 EX(lwc1 $f26,(SC_FPREGS+208)(a0))
112 EX(lwc1 $f27,(SC_FPREGS+216)(a0))
113 EX(lwc1 $f28,(SC_FPREGS+224)(a0))
114 EX(lwc1 $f29,(SC_FPREGS+232)(a0))
115 EX(lwc1 $f30,(SC_FPREGS+240)(a0))
116 EX(lwc1 $f31,(SC_FPREGS+248)(a0))
117 jr ra
118 ctc1 t0,fcr31
119 END(_restore_fp_context)
120 .set reorder
121
122 .type fault@function
123 .ent fault
124fault: li v0, -EFAULT
125 jr ra
126 .end fault