Unverified Commit e68ad867 authored by Alan Kao's avatar Alan Kao Committed by Palmer Dabbelt
Browse files

Extract FPU context operations from entry.S 



We move __fstate_save and __fstate_restore to a new source
file, fpu.S.

Signed-off-by: default avatarAlan 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: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarPalmer Dabbelt <palmer@sifive.com>
parent 84df9525

arch/riscv/kernel/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -13,6 +13,7 @@ extra-y += vmlinux.lds 
obj-y	+= cpu.o

obj-y	+= cpufeature.o

obj-y	+= entry.o

obj-y	+= fpu.o

obj-y	+= irq.o

obj-y	+= process.o

obj-y	+= ptrace.o

arch/riscv/kernel/entry.S

+0 −87
Original line number Diff line number Diff line
@@ -357,93 +357,6 @@ ENTRY(__switch_to) 
	ret

ENDPROC(__switch_to)



ENTRY(__fstate_save)

	li  a2,  TASK_THREAD_F0

	add a0, a0, a2

	li t1, SR_FS

	csrs sstatus, t1

	frcsr t0

	fsd f0,  TASK_THREAD_F0_F0(a0)

	fsd f1,  TASK_THREAD_F1_F0(a0)

	fsd f2,  TASK_THREAD_F2_F0(a0)

	fsd f3,  TASK_THREAD_F3_F0(a0)

	fsd f4,  TASK_THREAD_F4_F0(a0)

	fsd f5,  TASK_THREAD_F5_F0(a0)

	fsd f6,  TASK_THREAD_F6_F0(a0)

	fsd f7,  TASK_THREAD_F7_F0(a0)

	fsd f8,  TASK_THREAD_F8_F0(a0)

	fsd f9,  TASK_THREAD_F9_F0(a0)

	fsd f10, TASK_THREAD_F10_F0(a0)

	fsd f11, TASK_THREAD_F11_F0(a0)

	fsd f12, TASK_THREAD_F12_F0(a0)

	fsd f13, TASK_THREAD_F13_F0(a0)

	fsd f14, TASK_THREAD_F14_F0(a0)

	fsd f15, TASK_THREAD_F15_F0(a0)

	fsd f16, TASK_THREAD_F16_F0(a0)

	fsd f17, TASK_THREAD_F17_F0(a0)

	fsd f18, TASK_THREAD_F18_F0(a0)

	fsd f19, TASK_THREAD_F19_F0(a0)

	fsd f20, TASK_THREAD_F20_F0(a0)

	fsd f21, TASK_THREAD_F21_F0(a0)

	fsd f22, TASK_THREAD_F22_F0(a0)

	fsd f23, TASK_THREAD_F23_F0(a0)

	fsd f24, TASK_THREAD_F24_F0(a0)

	fsd f25, TASK_THREAD_F25_F0(a0)

	fsd f26, TASK_THREAD_F26_F0(a0)

	fsd f27, TASK_THREAD_F27_F0(a0)

	fsd f28, TASK_THREAD_F28_F0(a0)

	fsd f29, TASK_THREAD_F29_F0(a0)

	fsd f30, TASK_THREAD_F30_F0(a0)

	fsd f31, TASK_THREAD_F31_F0(a0)

	sw t0, TASK_THREAD_FCSR_F0(a0)

	csrc sstatus, t1

	ret

ENDPROC(__fstate_save)



ENTRY(__fstate_restore)

	li  a2,  TASK_THREAD_F0

	add a0, a0, a2

	li t1, SR_FS

	lw t0, TASK_THREAD_FCSR_F0(a0)

	csrs sstatus, t1

	fld f0,  TASK_THREAD_F0_F0(a0)

	fld f1,  TASK_THREAD_F1_F0(a0)

	fld f2,  TASK_THREAD_F2_F0(a0)

	fld f3,  TASK_THREAD_F3_F0(a0)

	fld f4,  TASK_THREAD_F4_F0(a0)

	fld f5,  TASK_THREAD_F5_F0(a0)

	fld f6,  TASK_THREAD_F6_F0(a0)

	fld f7,  TASK_THREAD_F7_F0(a0)

	fld f8,  TASK_THREAD_F8_F0(a0)

	fld f9,  TASK_THREAD_F9_F0(a0)

	fld f10, TASK_THREAD_F10_F0(a0)

	fld f11, TASK_THREAD_F11_F0(a0)

	fld f12, TASK_THREAD_F12_F0(a0)

	fld f13, TASK_THREAD_F13_F0(a0)

	fld f14, TASK_THREAD_F14_F0(a0)

	fld f15, TASK_THREAD_F15_F0(a0)

	fld f16, TASK_THREAD_F16_F0(a0)

	fld f17, TASK_THREAD_F17_F0(a0)

	fld f18, TASK_THREAD_F18_F0(a0)

	fld f19, TASK_THREAD_F19_F0(a0)

	fld f20, TASK_THREAD_F20_F0(a0)

	fld f21, TASK_THREAD_F21_F0(a0)

	fld f22, TASK_THREAD_F22_F0(a0)

	fld f23, TASK_THREAD_F23_F0(a0)

	fld f24, TASK_THREAD_F24_F0(a0)

	fld f25, TASK_THREAD_F25_F0(a0)

	fld f26, TASK_THREAD_F26_F0(a0)

	fld f27, TASK_THREAD_F27_F0(a0)

	fld f28, TASK_THREAD_F28_F0(a0)

	fld f29, TASK_THREAD_F29_F0(a0)

	fld f30, TASK_THREAD_F30_F0(a0)

	fld f31, TASK_THREAD_F31_F0(a0)

	fscsr t0

	csrc sstatus, t1

	ret

ENDPROC(__fstate_restore)





	.section ".rodata"

	/* Exception vector table */

ENTRY(excp_vect_table)

arch/riscv/kernel/fpu.S

0 → 100644
+106 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 */

/*

 * Copyright (C) 2012 Regents of the University of California

 * Copyright (C) 2017 SiFive

 *

 *   This program is free software; you can redistribute it and/or

 *   modify it under the terms of the GNU General Public License

 *   as published by the Free Software Foundation, version 2.

 *

 *   This program is distributed in the hope that it will be useful,

 *   but WITHOUT ANY WARRANTY; without even the implied warranty of

 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 *   GNU General Public License for more details.

 */



#include <linux/linkage.h>



#include <asm/asm.h>

#include <asm/csr.h>

#include <asm/asm-offsets.h>



ENTRY(__fstate_save)

	li  a2,  TASK_THREAD_F0

	add a0, a0, a2

	li t1, SR_FS

	csrs sstatus, t1

	frcsr t0

	fsd f0,  TASK_THREAD_F0_F0(a0)

	fsd f1,  TASK_THREAD_F1_F0(a0)

	fsd f2,  TASK_THREAD_F2_F0(a0)

	fsd f3,  TASK_THREAD_F3_F0(a0)

	fsd f4,  TASK_THREAD_F4_F0(a0)

	fsd f5,  TASK_THREAD_F5_F0(a0)

	fsd f6,  TASK_THREAD_F6_F0(a0)

	fsd f7,  TASK_THREAD_F7_F0(a0)

	fsd f8,  TASK_THREAD_F8_F0(a0)

	fsd f9,  TASK_THREAD_F9_F0(a0)

	fsd f10, TASK_THREAD_F10_F0(a0)

	fsd f11, TASK_THREAD_F11_F0(a0)

	fsd f12, TASK_THREAD_F12_F0(a0)

	fsd f13, TASK_THREAD_F13_F0(a0)

	fsd f14, TASK_THREAD_F14_F0(a0)

	fsd f15, TASK_THREAD_F15_F0(a0)

	fsd f16, TASK_THREAD_F16_F0(a0)

	fsd f17, TASK_THREAD_F17_F0(a0)

	fsd f18, TASK_THREAD_F18_F0(a0)

	fsd f19, TASK_THREAD_F19_F0(a0)

	fsd f20, TASK_THREAD_F20_F0(a0)

	fsd f21, TASK_THREAD_F21_F0(a0)

	fsd f22, TASK_THREAD_F22_F0(a0)

	fsd f23, TASK_THREAD_F23_F0(a0)

	fsd f24, TASK_THREAD_F24_F0(a0)

	fsd f25, TASK_THREAD_F25_F0(a0)

	fsd f26, TASK_THREAD_F26_F0(a0)

	fsd f27, TASK_THREAD_F27_F0(a0)

	fsd f28, TASK_THREAD_F28_F0(a0)

	fsd f29, TASK_THREAD_F29_F0(a0)

	fsd f30, TASK_THREAD_F30_F0(a0)

	fsd f31, TASK_THREAD_F31_F0(a0)

	sw t0, TASK_THREAD_FCSR_F0(a0)

	csrc sstatus, t1

	ret

ENDPROC(__fstate_save)



ENTRY(__fstate_restore)

	li  a2,  TASK_THREAD_F0

	add a0, a0, a2

	li t1, SR_FS

	lw t0, TASK_THREAD_FCSR_F0(a0)

	csrs sstatus, t1

	fld f0,  TASK_THREAD_F0_F0(a0)

	fld f1,  TASK_THREAD_F1_F0(a0)

	fld f2,  TASK_THREAD_F2_F0(a0)

	fld f3,  TASK_THREAD_F3_F0(a0)

	fld f4,  TASK_THREAD_F4_F0(a0)

	fld f5,  TASK_THREAD_F5_F0(a0)

	fld f6,  TASK_THREAD_F6_F0(a0)

	fld f7,  TASK_THREAD_F7_F0(a0)

	fld f8,  TASK_THREAD_F8_F0(a0)

	fld f9,  TASK_THREAD_F9_F0(a0)

	fld f10, TASK_THREAD_F10_F0(a0)

	fld f11, TASK_THREAD_F11_F0(a0)

	fld f12, TASK_THREAD_F12_F0(a0)

	fld f13, TASK_THREAD_F13_F0(a0)

	fld f14, TASK_THREAD_F14_F0(a0)

	fld f15, TASK_THREAD_F15_F0(a0)

	fld f16, TASK_THREAD_F16_F0(a0)

	fld f17, TASK_THREAD_F17_F0(a0)

	fld f18, TASK_THREAD_F18_F0(a0)

	fld f19, TASK_THREAD_F19_F0(a0)

	fld f20, TASK_THREAD_F20_F0(a0)

	fld f21, TASK_THREAD_F21_F0(a0)

	fld f22, TASK_THREAD_F22_F0(a0)

	fld f23, TASK_THREAD_F23_F0(a0)

	fld f24, TASK_THREAD_F24_F0(a0)

	fld f25, TASK_THREAD_F25_F0(a0)

	fld f26, TASK_THREAD_F26_F0(a0)

	fld f27, TASK_THREAD_F27_F0(a0)

	fld f28, TASK_THREAD_F28_F0(a0)

	fld f29, TASK_THREAD_F29_F0(a0)

	fld f30, TASK_THREAD_F30_F0(a0)

	fld f31, TASK_THREAD_F31_F0(a0)

	fscsr t0

	csrc sstatus, t1

	ret

ENDPROC(__fstate_restore)

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