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 111