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
6 * Copyright (C) 1996, 1998 by Ralf Baechle
8 * Multi-arch abstraction and asm macros for easier reading:
9 * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
11 * Further modifications to make this work:
12 * Copyright (c) 1998 Harald Koerfgen
14 #include <linux/export.h>
16 #include <asm/asmmacro.h>
17 #include <asm/errno.h>
18 #include <asm/fpregdef.h>
19 #include <asm/mipsregs.h>
20 #include <asm/asm-offsets.h>
21 #include <asm/regdef.h>
25 .section __ex_table,"a"; \
31 .section __ex_table,"a"; \
39 * Save a thread's fp context.
42 EXPORT_SYMBOL(_save_fp)
43 fpu_save_single a0, t1 # clobbers t1
48 * Restore a thread's fp context.
51 fpu_restore_single a0, t1 # clobbers t1
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
62 * Save FP context, including the 32 FP data registers and the FP
63 * control & status register, from the FPU to signal context.
65 LEAF(_save_fp_context)
68 li v0, 0 # assume success
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))
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
96 * Restore FP context, including the 32 FP data registers and the FP
97 * control & status register, from signal context to the FPU.
99 LEAF(_restore_fp_context)
102 li v0, 0 # assume success
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))
123 END(_restore_fp_context)
126 .type fault, @function
128 fault: li v0, -EFAULT