2db9ca0a35
When saving FP state to struct sigcontext, make use of the offsets provided by struct mips_abi to obtain appropriate addresses for the sc_fpregs & sc_fpc_csr fields of the sigcontext. This is done only for the native struct sigcontext in this patch (ie. for O32 in CONFIG_32BIT kernels or for N64 in CONFIG_64BIT kernels) but is done in preparation for sharing this code with compat ABIs in further patches. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: Guenter Roeck <linux@roeck-us.net> Cc: Matthew Fortune <matthew.fortune@imgtec.com> Cc: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Cc: linux-kernel@vger.kernel.org Cc: Richard Weinberger <richard@nod.at> Cc: James Hogan <james.hogan@imgtec.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Markos Chandras <markos.chandras@imgtec.com> Cc: Manuel Lauss <manuel.lauss@gmail.com> Cc: Maciej W. Rozycki <macro@codesourcery.com> Patchwork: https://patchwork.linux-mips.org/patch/10789/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
362 lines
8.4 KiB
ArmAsm
362 lines
8.4 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/asmmacro.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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/**
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* _save_fp_context() - save FP context from the FPU
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* @a0 - pointer to fpregs field of sigcontext
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* @a1 - pointer to fpc_csr field of sigcontext
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*
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* Save FP context, including the 32 FP data registers and the FP
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* control & status register, from the FPU to signal context.
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*/
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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, 8(a0)
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EX sdc1 $f3, 24(a0)
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EX sdc1 $f5, 40(a0)
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EX sdc1 $f7, 56(a0)
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EX sdc1 $f9, 72(a0)
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EX sdc1 $f11, 88(a0)
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EX sdc1 $f13, 104(a0)
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EX sdc1 $f15, 120(a0)
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EX sdc1 $f17, 136(a0)
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EX sdc1 $f19, 152(a0)
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EX sdc1 $f21, 168(a0)
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EX sdc1 $f23, 184(a0)
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EX sdc1 $f25, 200(a0)
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EX sdc1 $f27, 216(a0)
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EX sdc1 $f29, 232(a0)
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EX sdc1 $f31, 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, 0(a0)
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EX sdc1 $f2, 16(a0)
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EX sdc1 $f4, 32(a0)
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EX sdc1 $f6, 48(a0)
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EX sdc1 $f8, 64(a0)
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EX sdc1 $f10, 80(a0)
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EX sdc1 $f12, 96(a0)
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EX sdc1 $f14, 112(a0)
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EX sdc1 $f16, 128(a0)
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EX sdc1 $f18, 144(a0)
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EX sdc1 $f20, 160(a0)
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EX sdc1 $f22, 176(a0)
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EX sdc1 $f24, 192(a0)
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EX sdc1 $f26, 208(a0)
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EX sdc1 $f28, 224(a0)
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EX sdc1 $f30, 240(a0)
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EX sw t1, 0(a1)
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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_fp_context() - restore FP context to the FPU
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* @a0 - pointer to fpregs field of sigcontext
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* @a1 - pointer to fpc_csr field of sigcontext
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*
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* Restore FP context, including the 32 FP data registers and the FP
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* control & status register, from signal context to the FPU.
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*/
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LEAF(_restore_fp_context)
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EX lw t1, 0(a1)
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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, 8(a0)
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EX ldc1 $f3, 24(a0)
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EX ldc1 $f5, 40(a0)
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EX ldc1 $f7, 56(a0)
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EX ldc1 $f9, 72(a0)
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EX ldc1 $f11, 88(a0)
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EX ldc1 $f13, 104(a0)
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EX ldc1 $f15, 120(a0)
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EX ldc1 $f17, 136(a0)
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EX ldc1 $f19, 152(a0)
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EX ldc1 $f21, 168(a0)
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EX ldc1 $f23, 184(a0)
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EX ldc1 $f25, 200(a0)
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EX ldc1 $f27, 216(a0)
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EX ldc1 $f29, 232(a0)
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EX ldc1 $f31, 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, 0(a0)
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EX ldc1 $f2, 16(a0)
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EX ldc1 $f4, 32(a0)
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EX ldc1 $f6, 48(a0)
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EX ldc1 $f8, 64(a0)
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EX ldc1 $f10, 80(a0)
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EX ldc1 $f12, 96(a0)
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EX ldc1 $f14, 112(a0)
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EX ldc1 $f16, 128(a0)
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EX ldc1 $f18, 144(a0)
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EX ldc1 $f20, 160(a0)
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EX ldc1 $f22, 176(a0)
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EX ldc1 $f24, 192(a0)
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EX ldc1 $f26, 208(a0)
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EX ldc1 $f28, 224(a0)
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EX ldc1 $f30, 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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#ifdef CONFIG_CPU_HAS_MSA
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.macro op_one_wr op, idx, base
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.align 4
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\idx: \op \idx, 0, \base
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jr ra
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nop
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.endm
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.macro op_msa_wr name, op
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LEAF(\name)
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.set push
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.set noreorder
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sll t0, a0, 4
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PTR_LA t1, 0f
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PTR_ADDU t0, t0, t1
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jr t0
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nop
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op_one_wr \op, 0, a1
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op_one_wr \op, 1, a1
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op_one_wr \op, 2, a1
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op_one_wr \op, 3, a1
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op_one_wr \op, 4, a1
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op_one_wr \op, 5, a1
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op_one_wr \op, 6, a1
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op_one_wr \op, 7, a1
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op_one_wr \op, 8, a1
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op_one_wr \op, 9, a1
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op_one_wr \op, 10, a1
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op_one_wr \op, 11, a1
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op_one_wr \op, 12, a1
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op_one_wr \op, 13, a1
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op_one_wr \op, 14, a1
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op_one_wr \op, 15, a1
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op_one_wr \op, 16, a1
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op_one_wr \op, 17, a1
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op_one_wr \op, 18, a1
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op_one_wr \op, 19, a1
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op_one_wr \op, 20, a1
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op_one_wr \op, 21, a1
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op_one_wr \op, 22, a1
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op_one_wr \op, 23, a1
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op_one_wr \op, 24, a1
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op_one_wr \op, 25, a1
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op_one_wr \op, 26, a1
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op_one_wr \op, 27, a1
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op_one_wr \op, 28, a1
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op_one_wr \op, 29, a1
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op_one_wr \op, 30, a1
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op_one_wr \op, 31, a1
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.set pop
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END(\name)
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.endm
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op_msa_wr read_msa_wr_b, st_b
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op_msa_wr read_msa_wr_h, st_h
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op_msa_wr read_msa_wr_w, st_w
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op_msa_wr read_msa_wr_d, st_d
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op_msa_wr write_msa_wr_b, ld_b
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op_msa_wr write_msa_wr_h, ld_h
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op_msa_wr write_msa_wr_w, ld_w
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op_msa_wr write_msa_wr_d, ld_d
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#endif /* CONFIG_CPU_HAS_MSA */
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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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