/* * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 1996, 1998 by Ralf Baechle * * Multi-arch abstraction and asm macros for easier reading: * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com) * * Further modifications to make this work: * Copyright (c) 1998 Harald Koerfgen */ #include <asm/asm.h> #include <asm/errno.h> #include <asm/fpregdef.h> #include <asm/mipsregs.h> #include <asm/asm-offsets.h> #include <asm/regdef.h> #define EX(a,b) \ 9: a,##b; \ .section __ex_table,"a"; \ PTR 9b,bad_stack; \ .previous .set noreorder .set mips1 /* Save floating point context */ LEAF(_save_fp_context) li v0, 0 # assume success cfc1 t1,fcr31 EX(swc1 $f0,(SC_FPREGS+0)(a0)) EX(swc1 $f1,(SC_FPREGS+8)(a0)) EX(swc1 $f2,(SC_FPREGS+16)(a0)) EX(swc1 $f3,(SC_FPREGS+24)(a0)) EX(swc1 $f4,(SC_FPREGS+32)(a0)) EX(swc1 $f5,(SC_FPREGS+40)(a0)) EX(swc1 $f6,(SC_FPREGS+48)(a0)) EX(swc1 $f7,(SC_FPREGS+56)(a0)) EX(swc1 $f8,(SC_FPREGS+64)(a0)) EX(swc1 $f9,(SC_FPREGS+72)(a0)) EX(swc1 $f10,(SC_FPREGS+80)(a0)) EX(swc1 $f11,(SC_FPREGS+88)(a0)) EX(swc1 $f12,(SC_FPREGS+96)(a0)) EX(swc1 $f13,(SC_FPREGS+104)(a0)) EX(swc1 $f14,(SC_FPREGS+112)(a0)) EX(swc1 $f15,(SC_FPREGS+120)(a0)) EX(swc1 $f16,(SC_FPREGS+128)(a0)) EX(swc1 $f17,(SC_FPREGS+136)(a0)) EX(swc1 $f18,(SC_FPREGS+144)(a0)) EX(swc1 $f19,(SC_FPREGS+152)(a0)) EX(swc1 $f20,(SC_FPREGS+160)(a0)) EX(swc1 $f21,(SC_FPREGS+168)(a0)) EX(swc1 $f22,(SC_FPREGS+176)(a0)) EX(swc1 $f23,(SC_FPREGS+184)(a0)) EX(swc1 $f24,(SC_FPREGS+192)(a0)) EX(swc1 $f25,(SC_FPREGS+200)(a0)) EX(swc1 $f26,(SC_FPREGS+208)(a0)) EX(swc1 $f27,(SC_FPREGS+216)(a0)) EX(swc1 $f28,(SC_FPREGS+224)(a0)) EX(swc1 $f29,(SC_FPREGS+232)(a0)) EX(swc1 $f30,(SC_FPREGS+240)(a0)) EX(swc1 $f31,(SC_FPREGS+248)(a0)) EX(sw t1,(SC_FPC_CSR)(a0)) cfc1 t0,$0 # implementation/version jr ra .set nomacro EX(sw t0,(SC_FPC_EIR)(a0)) .set macro END(_save_fp_context) /* * Restore FPU state: * - fp gp registers * - cp1 status/control register * * We base the decision which registers to restore from the signal stack * frame on the current content of c0_status, not on the content of the * stack frame which might have been changed by the user. */ LEAF(_restore_fp_context) li v0, 0 # assume success EX(lw t0,(SC_FPC_CSR)(a0)) EX(lwc1 $f0,(SC_FPREGS+0)(a0)) EX(lwc1 $f1,(SC_FPREGS+8)(a0)) EX(lwc1 $f2,(SC_FPREGS+16)(a0)) EX(lwc1 $f3,(SC_FPREGS+24)(a0)) EX(lwc1 $f4,(SC_FPREGS+32)(a0)) EX(lwc1 $f5,(SC_FPREGS+40)(a0)) EX(lwc1 $f6,(SC_FPREGS+48)(a0)) EX(lwc1 $f7,(SC_FPREGS+56)(a0)) EX(lwc1 $f8,(SC_FPREGS+64)(a0)) EX(lwc1 $f9,(SC_FPREGS+72)(a0)) EX(lwc1 $f10,(SC_FPREGS+80)(a0)) EX(lwc1 $f11,(SC_FPREGS+88)(a0)) EX(lwc1 $f12,(SC_FPREGS+96)(a0)) EX(lwc1 $f13,(SC_FPREGS+104)(a0)) EX(lwc1 $f14,(SC_FPREGS+112)(a0)) EX(lwc1 $f15,(SC_FPREGS+120)(a0)) EX(lwc1 $f16,(SC_FPREGS+128)(a0)) EX(lwc1 $f17,(SC_FPREGS+136)(a0)) EX(lwc1 $f18,(SC_FPREGS+144)(a0)) EX(lwc1 $f19,(SC_FPREGS+152)(a0)) EX(lwc1 $f20,(SC_FPREGS+160)(a0)) EX(lwc1 $f21,(SC_FPREGS+168)(a0)) EX(lwc1 $f22,(SC_FPREGS+176)(a0)) EX(lwc1 $f23,(SC_FPREGS+184)(a0)) EX(lwc1 $f24,(SC_FPREGS+192)(a0)) EX(lwc1 $f25,(SC_FPREGS+200)(a0)) EX(lwc1 $f26,(SC_FPREGS+208)(a0)) EX(lwc1 $f27,(SC_FPREGS+216)(a0)) EX(lwc1 $f28,(SC_FPREGS+224)(a0)) EX(lwc1 $f29,(SC_FPREGS+232)(a0)) EX(lwc1 $f30,(SC_FPREGS+240)(a0)) EX(lwc1 $f31,(SC_FPREGS+248)(a0)) jr ra ctc1 t0,fcr31 END(_restore_fp_context) .set reorder .type fault@function .ent fault fault: li v0, -EFAULT jr ra .end fault