diff options
Diffstat (limited to 'arch/mips/kernel/r4k_fpu.S')
| -rw-r--r-- | arch/mips/kernel/r4k_fpu.S | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/arch/mips/kernel/r4k_fpu.S b/arch/mips/kernel/r4k_fpu.S new file mode 100644 index 000000000000..ebb643d8d14c --- /dev/null +++ b/arch/mips/kernel/r4k_fpu.S @@ -0,0 +1,191 @@ +/* + * 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, 98, 99, 2000, 01 Ralf Baechle + * + * Multi-arch abstraction and asm macros for easier reading: + * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com) + * + * Carsten Langgaard, carstenl@mips.com + * Copyright (C) 2000 MIPS Technologies, Inc. + * Copyright (C) 1999, 2001 Silicon Graphics, Inc. + */ +#include <linux/config.h> +#include <asm/asm.h> +#include <asm/errno.h> +#include <asm/fpregdef.h> +#include <asm/mipsregs.h> +#include <asm/offset.h> +#include <asm/regdef.h> + + .macro EX insn, reg, src + .set push + .set nomacro +.ex\@: \insn \reg, \src + .set pop + .section __ex_table,"a" + PTR .ex\@, fault + .previous + .endm + + .set noreorder + .set mips3 + /* Save floating point context */ +LEAF(_save_fp_context) + cfc1 t1, fcr31 + +#ifdef CONFIG_MIPS64 + /* Store the 16 odd double precision registers */ + EX sdc1 $f1, SC_FPREGS+8(a0) + EX sdc1 $f3, SC_FPREGS+24(a0) + EX sdc1 $f5, SC_FPREGS+40(a0) + EX sdc1 $f7, SC_FPREGS+56(a0) + EX sdc1 $f9, SC_FPREGS+72(a0) + EX sdc1 $f11, SC_FPREGS+88(a0) + EX sdc1 $f13, SC_FPREGS+104(a0) + EX sdc1 $f15, SC_FPREGS+120(a0) + EX sdc1 $f17, SC_FPREGS+136(a0) + EX sdc1 $f19, SC_FPREGS+152(a0) + EX sdc1 $f21, SC_FPREGS+168(a0) + EX sdc1 $f23, SC_FPREGS+184(a0) + EX sdc1 $f25, SC_FPREGS+200(a0) + EX sdc1 $f27, SC_FPREGS+216(a0) + EX sdc1 $f29, SC_FPREGS+232(a0) + EX sdc1 $f31, SC_FPREGS+248(a0) +#endif + + /* Store the 16 even double precision registers */ + EX sdc1 $f0, SC_FPREGS+0(a0) + EX sdc1 $f2, SC_FPREGS+16(a0) + EX sdc1 $f4, SC_FPREGS+32(a0) + EX sdc1 $f6, SC_FPREGS+48(a0) + EX sdc1 $f8, SC_FPREGS+64(a0) + EX sdc1 $f10, SC_FPREGS+80(a0) + EX sdc1 $f12, SC_FPREGS+96(a0) + EX sdc1 $f14, SC_FPREGS+112(a0) + EX sdc1 $f16, SC_FPREGS+128(a0) + EX sdc1 $f18, SC_FPREGS+144(a0) + EX sdc1 $f20, SC_FPREGS+160(a0) + EX sdc1 $f22, SC_FPREGS+176(a0) + EX sdc1 $f24, SC_FPREGS+192(a0) + EX sdc1 $f26, SC_FPREGS+208(a0) + EX sdc1 $f28, SC_FPREGS+224(a0) + EX sdc1 $f30, SC_FPREGS+240(a0) + EX sw t1, SC_FPC_CSR(a0) + cfc1 t0, $0 # implementation/version + EX sw t0, SC_FPC_EIR(a0) + + jr ra + li v0, 0 # success + END(_save_fp_context) + +#ifdef CONFIG_MIPS32_COMPAT + /* Save 32-bit process floating point context */ +LEAF(_save_fp_context32) + cfc1 t1, fcr31 + + EX sdc1 $f0, SC32_FPREGS+0(a0) + EX sdc1 $f2, SC32_FPREGS+16(a0) + EX sdc1 $f4, SC32_FPREGS+32(a0) + EX sdc1 $f6, SC32_FPREGS+48(a0) + EX sdc1 $f8, SC32_FPREGS+64(a0) + EX sdc1 $f10, SC32_FPREGS+80(a0) + EX sdc1 $f12, SC32_FPREGS+96(a0) + EX sdc1 $f14, SC32_FPREGS+112(a0) + EX sdc1 $f16, SC32_FPREGS+128(a0) + EX sdc1 $f18, SC32_FPREGS+144(a0) + EX sdc1 $f20, SC32_FPREGS+160(a0) + EX sdc1 $f22, SC32_FPREGS+176(a0) + EX sdc1 $f24, SC32_FPREGS+192(a0) + EX sdc1 $f26, SC32_FPREGS+208(a0) + EX sdc1 $f28, SC32_FPREGS+224(a0) + EX sdc1 $f30, SC32_FPREGS+240(a0) + EX sw t1, SC32_FPC_CSR(a0) + cfc1 t0, $0 # implementation/version + EX sw t0, SC32_FPC_EIR(a0) + + jr ra + li v0, 0 # success + END(_save_fp_context32) +#endif + +/* + * Restore FPU state: + * - fp gp registers + * - cp1 status/control register + */ +LEAF(_restore_fp_context) + EX lw t0, SC_FPC_CSR(a0) +#ifdef CONFIG_MIPS64 + EX ldc1 $f1, SC_FPREGS+8(a0) + EX ldc1 $f3, SC_FPREGS+24(a0) + EX ldc1 $f5, SC_FPREGS+40(a0) + EX ldc1 $f7, SC_FPREGS+56(a0) + EX ldc1 $f9, SC_FPREGS+72(a0) + EX ldc1 $f11, SC_FPREGS+88(a0) + EX ldc1 $f13, SC_FPREGS+104(a0) + EX ldc1 $f15, SC_FPREGS+120(a0) + EX ldc1 $f17, SC_FPREGS+136(a0) + EX ldc1 $f19, SC_FPREGS+152(a0) + EX ldc1 $f21, SC_FPREGS+168(a0) + EX ldc1 $f23, SC_FPREGS+184(a0) + EX ldc1 $f25, SC_FPREGS+200(a0) + EX ldc1 $f27, SC_FPREGS+216(a0) + EX ldc1 $f29, SC_FPREGS+232(a0) + EX ldc1 $f31, SC_FPREGS+248(a0) +#endif + EX ldc1 $f0, SC_FPREGS+0(a0) + EX ldc1 $f2, SC_FPREGS+16(a0) + EX ldc1 $f4, SC_FPREGS+32(a0) + EX ldc1 $f6, SC_FPREGS+48(a0) + EX ldc1 $f8, SC_FPREGS+64(a0) + EX ldc1 $f10, SC_FPREGS+80(a0) + EX ldc1 $f12, SC_FPREGS+96(a0) + EX ldc1 $f14, SC_FPREGS+112(a0) + EX ldc1 $f16, SC_FPREGS+128(a0) + EX ldc1 $f18, SC_FPREGS+144(a0) + EX ldc1 $f20, SC_FPREGS+160(a0) + EX ldc1 $f22, SC_FPREGS+176(a0) + EX ldc1 $f24, SC_FPREGS+192(a0) + EX ldc1 $f26, SC_FPREGS+208(a0) + EX ldc1 $f28, SC_FPREGS+224(a0) + EX ldc1 $f30, SC_FPREGS+240(a0) + ctc1 t0, fcr31 + jr ra + li v0, 0 # success + END(_restore_fp_context) + +#ifdef CONFIG_MIPS32_COMPAT +LEAF(_restore_fp_context32) + /* Restore an o32 sigcontext. */ + EX lw t0, SC32_FPC_CSR(a0) + EX ldc1 $f0, SC32_FPREGS+0(a0) + EX ldc1 $f2, SC32_FPREGS+16(a0) + EX ldc1 $f4, SC32_FPREGS+32(a0) + EX ldc1 $f6, SC32_FPREGS+48(a0) + EX ldc1 $f8, SC32_FPREGS+64(a0) + EX ldc1 $f10, SC32_FPREGS+80(a0) + EX ldc1 $f12, SC32_FPREGS+96(a0) + EX ldc1 $f14, SC32_FPREGS+112(a0) + EX ldc1 $f16, SC32_FPREGS+128(a0) + EX ldc1 $f18, SC32_FPREGS+144(a0) + EX ldc1 $f20, SC32_FPREGS+160(a0) + EX ldc1 $f22, SC32_FPREGS+176(a0) + EX ldc1 $f24, SC32_FPREGS+192(a0) + EX ldc1 $f26, SC32_FPREGS+208(a0) + EX ldc1 $f28, SC32_FPREGS+224(a0) + EX ldc1 $f30, SC32_FPREGS+240(a0) + ctc1 t0, fcr31 + jr ra + li v0, 0 # success + END(_restore_fp_context32) + .set reorder +#endif + + .type fault@function + .ent fault +fault: li v0, -EFAULT # failure + jr ra + .end fault |