Extract FPU context operations from entry.S
We move __fstate_save and __fstate_restore to a new source file, fpu.S. Signed-off-by: Alan Kao <alankao@andestech.com> Cc: Greentime Hu <greentime@andestech.com> Cc: Vincent Chen <vincentc@andestech.com> Cc: Zong Li <zong@andestech.com> Cc: Nick Hu <nickhu@andestech.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
This commit is contained in:
Alan Kao
Palmer Dabbelt
parent
84df9525b0
commit
e68ad867f7
@ -13,6 +13,7 @@ extra-y += vmlinux.lds
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obj-y += cpu.o
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obj-y += cpufeature.o
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obj-y += entry.o
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obj-y += fpu.o
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obj-y += irq.o
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obj-y += process.o
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obj-y += ptrace.o
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@ -357,93 +357,6 @@ ENTRY(__switch_to)
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ret
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ENDPROC(__switch_to)
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ENTRY(__fstate_save)
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li a2, TASK_THREAD_F0
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add a0, a0, a2
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li t1, SR_FS
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csrs sstatus, t1
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frcsr t0
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fsd f0, TASK_THREAD_F0_F0(a0)
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fsd f1, TASK_THREAD_F1_F0(a0)
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fsd f2, TASK_THREAD_F2_F0(a0)
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fsd f3, TASK_THREAD_F3_F0(a0)
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fsd f4, TASK_THREAD_F4_F0(a0)
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fsd f5, TASK_THREAD_F5_F0(a0)
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fsd f6, TASK_THREAD_F6_F0(a0)
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fsd f7, TASK_THREAD_F7_F0(a0)
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fsd f8, TASK_THREAD_F8_F0(a0)
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fsd f9, TASK_THREAD_F9_F0(a0)
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fsd f10, TASK_THREAD_F10_F0(a0)
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fsd f11, TASK_THREAD_F11_F0(a0)
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fsd f12, TASK_THREAD_F12_F0(a0)
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fsd f13, TASK_THREAD_F13_F0(a0)
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fsd f14, TASK_THREAD_F14_F0(a0)
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fsd f15, TASK_THREAD_F15_F0(a0)
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fsd f16, TASK_THREAD_F16_F0(a0)
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fsd f17, TASK_THREAD_F17_F0(a0)
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fsd f18, TASK_THREAD_F18_F0(a0)
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fsd f19, TASK_THREAD_F19_F0(a0)
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fsd f20, TASK_THREAD_F20_F0(a0)
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fsd f21, TASK_THREAD_F21_F0(a0)
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fsd f22, TASK_THREAD_F22_F0(a0)
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fsd f23, TASK_THREAD_F23_F0(a0)
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fsd f24, TASK_THREAD_F24_F0(a0)
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fsd f25, TASK_THREAD_F25_F0(a0)
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fsd f26, TASK_THREAD_F26_F0(a0)
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fsd f27, TASK_THREAD_F27_F0(a0)
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fsd f28, TASK_THREAD_F28_F0(a0)
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fsd f29, TASK_THREAD_F29_F0(a0)
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fsd f30, TASK_THREAD_F30_F0(a0)
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fsd f31, TASK_THREAD_F31_F0(a0)
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sw t0, TASK_THREAD_FCSR_F0(a0)
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csrc sstatus, t1
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ret
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ENDPROC(__fstate_save)
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ENTRY(__fstate_restore)
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li a2, TASK_THREAD_F0
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add a0, a0, a2
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li t1, SR_FS
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lw t0, TASK_THREAD_FCSR_F0(a0)
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csrs sstatus, t1
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fld f0, TASK_THREAD_F0_F0(a0)
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fld f1, TASK_THREAD_F1_F0(a0)
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fld f2, TASK_THREAD_F2_F0(a0)
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fld f3, TASK_THREAD_F3_F0(a0)
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fld f4, TASK_THREAD_F4_F0(a0)
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fld f5, TASK_THREAD_F5_F0(a0)
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fld f6, TASK_THREAD_F6_F0(a0)
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fld f7, TASK_THREAD_F7_F0(a0)
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fld f8, TASK_THREAD_F8_F0(a0)
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fld f9, TASK_THREAD_F9_F0(a0)
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fld f10, TASK_THREAD_F10_F0(a0)
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fld f11, TASK_THREAD_F11_F0(a0)
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fld f12, TASK_THREAD_F12_F0(a0)
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fld f13, TASK_THREAD_F13_F0(a0)
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fld f14, TASK_THREAD_F14_F0(a0)
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fld f15, TASK_THREAD_F15_F0(a0)
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fld f16, TASK_THREAD_F16_F0(a0)
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fld f17, TASK_THREAD_F17_F0(a0)
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fld f18, TASK_THREAD_F18_F0(a0)
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fld f19, TASK_THREAD_F19_F0(a0)
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fld f20, TASK_THREAD_F20_F0(a0)
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fld f21, TASK_THREAD_F21_F0(a0)
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fld f22, TASK_THREAD_F22_F0(a0)
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fld f23, TASK_THREAD_F23_F0(a0)
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fld f24, TASK_THREAD_F24_F0(a0)
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fld f25, TASK_THREAD_F25_F0(a0)
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fld f26, TASK_THREAD_F26_F0(a0)
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fld f27, TASK_THREAD_F27_F0(a0)
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fld f28, TASK_THREAD_F28_F0(a0)
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fld f29, TASK_THREAD_F29_F0(a0)
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fld f30, TASK_THREAD_F30_F0(a0)
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fld f31, TASK_THREAD_F31_F0(a0)
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fscsr t0
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csrc sstatus, t1
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ret
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ENDPROC(__fstate_restore)
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.section ".rodata"
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/* Exception vector table */
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ENTRY(excp_vect_table)
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106
arch/riscv/kernel/fpu.S
Normal file
106
arch/riscv/kernel/fpu.S
Normal file
@ -0,0 +1,106 @@
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2012 Regents of the University of California
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* Copyright (C) 2017 SiFive
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, version 2.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/linkage.h>
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#include <asm/asm.h>
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#include <asm/csr.h>
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#include <asm/asm-offsets.h>
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ENTRY(__fstate_save)
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li a2, TASK_THREAD_F0
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add a0, a0, a2
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li t1, SR_FS
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csrs sstatus, t1
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frcsr t0
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fsd f0, TASK_THREAD_F0_F0(a0)
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fsd f1, TASK_THREAD_F1_F0(a0)
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fsd f2, TASK_THREAD_F2_F0(a0)
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fsd f3, TASK_THREAD_F3_F0(a0)
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fsd f4, TASK_THREAD_F4_F0(a0)
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fsd f5, TASK_THREAD_F5_F0(a0)
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fsd f6, TASK_THREAD_F6_F0(a0)
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fsd f7, TASK_THREAD_F7_F0(a0)
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fsd f8, TASK_THREAD_F8_F0(a0)
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fsd f9, TASK_THREAD_F9_F0(a0)
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fsd f10, TASK_THREAD_F10_F0(a0)
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fsd f11, TASK_THREAD_F11_F0(a0)
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fsd f12, TASK_THREAD_F12_F0(a0)
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fsd f13, TASK_THREAD_F13_F0(a0)
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fsd f14, TASK_THREAD_F14_F0(a0)
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fsd f15, TASK_THREAD_F15_F0(a0)
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fsd f16, TASK_THREAD_F16_F0(a0)
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fsd f17, TASK_THREAD_F17_F0(a0)
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fsd f18, TASK_THREAD_F18_F0(a0)
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fsd f19, TASK_THREAD_F19_F0(a0)
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fsd f20, TASK_THREAD_F20_F0(a0)
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fsd f21, TASK_THREAD_F21_F0(a0)
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fsd f22, TASK_THREAD_F22_F0(a0)
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fsd f23, TASK_THREAD_F23_F0(a0)
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fsd f24, TASK_THREAD_F24_F0(a0)
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fsd f25, TASK_THREAD_F25_F0(a0)
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fsd f26, TASK_THREAD_F26_F0(a0)
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fsd f27, TASK_THREAD_F27_F0(a0)
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fsd f28, TASK_THREAD_F28_F0(a0)
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fsd f29, TASK_THREAD_F29_F0(a0)
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fsd f30, TASK_THREAD_F30_F0(a0)
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fsd f31, TASK_THREAD_F31_F0(a0)
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sw t0, TASK_THREAD_FCSR_F0(a0)
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csrc sstatus, t1
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ret
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ENDPROC(__fstate_save)
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ENTRY(__fstate_restore)
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li a2, TASK_THREAD_F0
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add a0, a0, a2
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li t1, SR_FS
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lw t0, TASK_THREAD_FCSR_F0(a0)
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csrs sstatus, t1
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fld f0, TASK_THREAD_F0_F0(a0)
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fld f1, TASK_THREAD_F1_F0(a0)
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fld f2, TASK_THREAD_F2_F0(a0)
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fld f3, TASK_THREAD_F3_F0(a0)
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fld f4, TASK_THREAD_F4_F0(a0)
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fld f5, TASK_THREAD_F5_F0(a0)
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fld f6, TASK_THREAD_F6_F0(a0)
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fld f7, TASK_THREAD_F7_F0(a0)
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fld f8, TASK_THREAD_F8_F0(a0)
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fld f9, TASK_THREAD_F9_F0(a0)
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fld f10, TASK_THREAD_F10_F0(a0)
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fld f11, TASK_THREAD_F11_F0(a0)
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fld f12, TASK_THREAD_F12_F0(a0)
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fld f13, TASK_THREAD_F13_F0(a0)
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fld f14, TASK_THREAD_F14_F0(a0)
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fld f15, TASK_THREAD_F15_F0(a0)
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fld f16, TASK_THREAD_F16_F0(a0)
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fld f17, TASK_THREAD_F17_F0(a0)
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fld f18, TASK_THREAD_F18_F0(a0)
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fld f19, TASK_THREAD_F19_F0(a0)
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fld f20, TASK_THREAD_F20_F0(a0)
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fld f21, TASK_THREAD_F21_F0(a0)
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fld f22, TASK_THREAD_F22_F0(a0)
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fld f23, TASK_THREAD_F23_F0(a0)
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fld f24, TASK_THREAD_F24_F0(a0)
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fld f25, TASK_THREAD_F25_F0(a0)
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fld f26, TASK_THREAD_F26_F0(a0)
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fld f27, TASK_THREAD_F27_F0(a0)
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fld f28, TASK_THREAD_F28_F0(a0)
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fld f29, TASK_THREAD_F29_F0(a0)
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fld f30, TASK_THREAD_F30_F0(a0)
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fld f31, TASK_THREAD_F31_F0(a0)
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fscsr t0
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csrc sstatus, t1
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ret
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ENDPROC(__fstate_restore)
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