forked from Minki/linux
631afc65e8
The {save,restore}_fp_context{,32} functions require that the assembler
allows the use of sdc instructions on any FP register, and this is
acomplished by setting the arch to mips64r2 or mips64r6
(using MIPS_ISA_ARCH_LEVEL_RAW).
However this has the effect of enabling the assembler to use mips64
instructions in the expansion of pseudo-instructions. This was done in
the (now-reverted) commit eec43a224c "MIPS: Save/restore MSA context
around signals" which led to my mistakenly believing that there was an
assembler bug, when in reality the assembler was just emitting mips64
instructions. Avoid the issue for future commits which will add code to
r4k_fpu.S by pushing the .set MIPS_ISA_ARCH_LEVEL_RAW directives into
the functions that require it, and remove the spurious assertion
declaring the assembler bug.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
[james.hogan@imgtec.com: Rebase on v4.0-rc1 and reword commit message to
reflect use of MIPS_ISA_ARCH_LEVEL_RAW]
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/9612/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
284 lines
7.3 KiB
ArmAsm
284 lines
7.3 KiB
ArmAsm
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1996, 98, 99, 2000, 01 Ralf Baechle
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*
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* Multi-arch abstraction and asm macros for easier reading:
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* Copyright (C) 1996 David S. Miller (davem@davemloft.net)
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*
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* Carsten Langgaard, carstenl@mips.com
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* Copyright (C) 2000 MIPS Technologies, Inc.
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* Copyright (C) 1999, 2001 Silicon Graphics, Inc.
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*/
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#include <asm/asm.h>
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#include <asm/errno.h>
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#include <asm/fpregdef.h>
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#include <asm/mipsregs.h>
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#include <asm/asm-offsets.h>
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#include <asm/regdef.h>
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/* preprocessor replaces the fp in ".set fp=64" with $30 otherwise */
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#undef fp
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.macro EX insn, reg, src
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.set push
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SET_HARDFLOAT
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.set nomacro
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.ex\@: \insn \reg, \src
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.set pop
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.section __ex_table,"a"
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PTR .ex\@, fault
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.previous
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.endm
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.set noreorder
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LEAF(_save_fp_context)
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.set push
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SET_HARDFLOAT
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cfc1 t1, fcr31
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.set pop
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#if defined(CONFIG_64BIT) || defined(CONFIG_CPU_MIPS32_R2) || \
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defined(CONFIG_CPU_MIPS32_R6)
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.set push
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SET_HARDFLOAT
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#ifdef CONFIG_CPU_MIPS32_R2
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.set mips32r2
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.set fp=64
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mfc0 t0, CP0_STATUS
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sll t0, t0, 5
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bgez t0, 1f # skip storing odd if FR=0
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nop
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#endif
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/* Store the 16 odd double precision registers */
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EX sdc1 $f1, SC_FPREGS+8(a0)
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EX sdc1 $f3, SC_FPREGS+24(a0)
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EX sdc1 $f5, SC_FPREGS+40(a0)
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EX sdc1 $f7, SC_FPREGS+56(a0)
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EX sdc1 $f9, SC_FPREGS+72(a0)
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EX sdc1 $f11, SC_FPREGS+88(a0)
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EX sdc1 $f13, SC_FPREGS+104(a0)
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EX sdc1 $f15, SC_FPREGS+120(a0)
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EX sdc1 $f17, SC_FPREGS+136(a0)
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EX sdc1 $f19, SC_FPREGS+152(a0)
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EX sdc1 $f21, SC_FPREGS+168(a0)
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EX sdc1 $f23, SC_FPREGS+184(a0)
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EX sdc1 $f25, SC_FPREGS+200(a0)
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EX sdc1 $f27, SC_FPREGS+216(a0)
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EX sdc1 $f29, SC_FPREGS+232(a0)
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EX sdc1 $f31, SC_FPREGS+248(a0)
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1: .set pop
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#endif
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.set push
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SET_HARDFLOAT
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/* Store the 16 even double precision registers */
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EX sdc1 $f0, SC_FPREGS+0(a0)
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EX sdc1 $f2, SC_FPREGS+16(a0)
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EX sdc1 $f4, SC_FPREGS+32(a0)
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EX sdc1 $f6, SC_FPREGS+48(a0)
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EX sdc1 $f8, SC_FPREGS+64(a0)
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EX sdc1 $f10, SC_FPREGS+80(a0)
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EX sdc1 $f12, SC_FPREGS+96(a0)
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EX sdc1 $f14, SC_FPREGS+112(a0)
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EX sdc1 $f16, SC_FPREGS+128(a0)
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EX sdc1 $f18, SC_FPREGS+144(a0)
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EX sdc1 $f20, SC_FPREGS+160(a0)
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EX sdc1 $f22, SC_FPREGS+176(a0)
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EX sdc1 $f24, SC_FPREGS+192(a0)
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EX sdc1 $f26, SC_FPREGS+208(a0)
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EX sdc1 $f28, SC_FPREGS+224(a0)
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EX sdc1 $f30, SC_FPREGS+240(a0)
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EX sw t1, SC_FPC_CSR(a0)
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jr ra
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li v0, 0 # success
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.set pop
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END(_save_fp_context)
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#ifdef CONFIG_MIPS32_COMPAT
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/* Save 32-bit process floating point context */
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LEAF(_save_fp_context32)
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.set push
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.set MIPS_ISA_ARCH_LEVEL_RAW
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SET_HARDFLOAT
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cfc1 t1, fcr31
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#ifndef CONFIG_CPU_MIPS64_R6
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mfc0 t0, CP0_STATUS
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sll t0, t0, 5
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bgez t0, 1f # skip storing odd if FR=0
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nop
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#endif
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/* Store the 16 odd double precision registers */
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EX sdc1 $f1, SC32_FPREGS+8(a0)
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EX sdc1 $f3, SC32_FPREGS+24(a0)
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EX sdc1 $f5, SC32_FPREGS+40(a0)
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EX sdc1 $f7, SC32_FPREGS+56(a0)
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EX sdc1 $f9, SC32_FPREGS+72(a0)
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EX sdc1 $f11, SC32_FPREGS+88(a0)
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EX sdc1 $f13, SC32_FPREGS+104(a0)
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EX sdc1 $f15, SC32_FPREGS+120(a0)
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EX sdc1 $f17, SC32_FPREGS+136(a0)
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EX sdc1 $f19, SC32_FPREGS+152(a0)
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EX sdc1 $f21, SC32_FPREGS+168(a0)
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EX sdc1 $f23, SC32_FPREGS+184(a0)
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EX sdc1 $f25, SC32_FPREGS+200(a0)
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EX sdc1 $f27, SC32_FPREGS+216(a0)
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EX sdc1 $f29, SC32_FPREGS+232(a0)
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EX sdc1 $f31, SC32_FPREGS+248(a0)
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/* Store the 16 even double precision registers */
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1: EX sdc1 $f0, SC32_FPREGS+0(a0)
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EX sdc1 $f2, SC32_FPREGS+16(a0)
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EX sdc1 $f4, SC32_FPREGS+32(a0)
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EX sdc1 $f6, SC32_FPREGS+48(a0)
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EX sdc1 $f8, SC32_FPREGS+64(a0)
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EX sdc1 $f10, SC32_FPREGS+80(a0)
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EX sdc1 $f12, SC32_FPREGS+96(a0)
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EX sdc1 $f14, SC32_FPREGS+112(a0)
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EX sdc1 $f16, SC32_FPREGS+128(a0)
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EX sdc1 $f18, SC32_FPREGS+144(a0)
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EX sdc1 $f20, SC32_FPREGS+160(a0)
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EX sdc1 $f22, SC32_FPREGS+176(a0)
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EX sdc1 $f24, SC32_FPREGS+192(a0)
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EX sdc1 $f26, SC32_FPREGS+208(a0)
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EX sdc1 $f28, SC32_FPREGS+224(a0)
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EX sdc1 $f30, SC32_FPREGS+240(a0)
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EX sw t1, SC32_FPC_CSR(a0)
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cfc1 t0, $0 # implementation/version
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EX sw t0, SC32_FPC_EIR(a0)
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.set pop
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jr ra
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li v0, 0 # success
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END(_save_fp_context32)
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#endif
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/*
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* Restore FPU state:
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* - fp gp registers
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* - cp1 status/control register
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*/
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LEAF(_restore_fp_context)
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EX lw t1, SC_FPC_CSR(a0)
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#if defined(CONFIG_64BIT) || defined(CONFIG_CPU_MIPS32_R2) || \
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defined(CONFIG_CPU_MIPS32_R6)
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.set push
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SET_HARDFLOAT
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#ifdef CONFIG_CPU_MIPS32_R2
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.set mips32r2
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.set fp=64
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mfc0 t0, CP0_STATUS
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sll t0, t0, 5
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bgez t0, 1f # skip loading odd if FR=0
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nop
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#endif
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EX ldc1 $f1, SC_FPREGS+8(a0)
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EX ldc1 $f3, SC_FPREGS+24(a0)
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EX ldc1 $f5, SC_FPREGS+40(a0)
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EX ldc1 $f7, SC_FPREGS+56(a0)
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EX ldc1 $f9, SC_FPREGS+72(a0)
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EX ldc1 $f11, SC_FPREGS+88(a0)
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EX ldc1 $f13, SC_FPREGS+104(a0)
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EX ldc1 $f15, SC_FPREGS+120(a0)
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EX ldc1 $f17, SC_FPREGS+136(a0)
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EX ldc1 $f19, SC_FPREGS+152(a0)
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EX ldc1 $f21, SC_FPREGS+168(a0)
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EX ldc1 $f23, SC_FPREGS+184(a0)
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EX ldc1 $f25, SC_FPREGS+200(a0)
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EX ldc1 $f27, SC_FPREGS+216(a0)
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EX ldc1 $f29, SC_FPREGS+232(a0)
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EX ldc1 $f31, SC_FPREGS+248(a0)
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1: .set pop
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#endif
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.set push
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SET_HARDFLOAT
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EX ldc1 $f0, SC_FPREGS+0(a0)
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EX ldc1 $f2, SC_FPREGS+16(a0)
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EX ldc1 $f4, SC_FPREGS+32(a0)
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EX ldc1 $f6, SC_FPREGS+48(a0)
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EX ldc1 $f8, SC_FPREGS+64(a0)
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EX ldc1 $f10, SC_FPREGS+80(a0)
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EX ldc1 $f12, SC_FPREGS+96(a0)
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EX ldc1 $f14, SC_FPREGS+112(a0)
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EX ldc1 $f16, SC_FPREGS+128(a0)
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EX ldc1 $f18, SC_FPREGS+144(a0)
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EX ldc1 $f20, SC_FPREGS+160(a0)
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EX ldc1 $f22, SC_FPREGS+176(a0)
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EX ldc1 $f24, SC_FPREGS+192(a0)
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EX ldc1 $f26, SC_FPREGS+208(a0)
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EX ldc1 $f28, SC_FPREGS+224(a0)
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EX ldc1 $f30, SC_FPREGS+240(a0)
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ctc1 t1, fcr31
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.set pop
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jr ra
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li v0, 0 # success
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END(_restore_fp_context)
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#ifdef CONFIG_MIPS32_COMPAT
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LEAF(_restore_fp_context32)
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/* Restore an o32 sigcontext. */
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.set push
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SET_HARDFLOAT
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EX lw t1, SC32_FPC_CSR(a0)
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#ifndef CONFIG_CPU_MIPS64_R6
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mfc0 t0, CP0_STATUS
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sll t0, t0, 5
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bgez t0, 1f # skip loading odd if FR=0
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nop
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#endif
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EX ldc1 $f1, SC32_FPREGS+8(a0)
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EX ldc1 $f3, SC32_FPREGS+24(a0)
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EX ldc1 $f5, SC32_FPREGS+40(a0)
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EX ldc1 $f7, SC32_FPREGS+56(a0)
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EX ldc1 $f9, SC32_FPREGS+72(a0)
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EX ldc1 $f11, SC32_FPREGS+88(a0)
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EX ldc1 $f13, SC32_FPREGS+104(a0)
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EX ldc1 $f15, SC32_FPREGS+120(a0)
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EX ldc1 $f17, SC32_FPREGS+136(a0)
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EX ldc1 $f19, SC32_FPREGS+152(a0)
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EX ldc1 $f21, SC32_FPREGS+168(a0)
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EX ldc1 $f23, SC32_FPREGS+184(a0)
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EX ldc1 $f25, SC32_FPREGS+200(a0)
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EX ldc1 $f27, SC32_FPREGS+216(a0)
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EX ldc1 $f29, SC32_FPREGS+232(a0)
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EX ldc1 $f31, SC32_FPREGS+248(a0)
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1: EX ldc1 $f0, SC32_FPREGS+0(a0)
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EX ldc1 $f2, SC32_FPREGS+16(a0)
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EX ldc1 $f4, SC32_FPREGS+32(a0)
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EX ldc1 $f6, SC32_FPREGS+48(a0)
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EX ldc1 $f8, SC32_FPREGS+64(a0)
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EX ldc1 $f10, SC32_FPREGS+80(a0)
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EX ldc1 $f12, SC32_FPREGS+96(a0)
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EX ldc1 $f14, SC32_FPREGS+112(a0)
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EX ldc1 $f16, SC32_FPREGS+128(a0)
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EX ldc1 $f18, SC32_FPREGS+144(a0)
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EX ldc1 $f20, SC32_FPREGS+160(a0)
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EX ldc1 $f22, SC32_FPREGS+176(a0)
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EX ldc1 $f24, SC32_FPREGS+192(a0)
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EX ldc1 $f26, SC32_FPREGS+208(a0)
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EX ldc1 $f28, SC32_FPREGS+224(a0)
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EX ldc1 $f30, SC32_FPREGS+240(a0)
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ctc1 t1, fcr31
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jr ra
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li v0, 0 # success
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.set pop
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END(_restore_fp_context32)
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#endif
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.set reorder
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.type fault@function
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.ent fault
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fault: li v0, -EFAULT # failure
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jr ra
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.end fault
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