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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/loongarch/mm/page.S
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/* SPDX-License-Identifier: GPL-2.0 */

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/*

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 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited

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 */

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#include <linux/export.h>

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#include <linux/linkage.h>

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#include <asm/asm.h>

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#include <asm/page.h>

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#include <asm/regdef.h>

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	.align 5

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SYM_FUNC_START(clear_page)

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	lu12i.w	t0, 1 << (PAGE_SHIFT - 12)

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	add.d	t0, t0, a0

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1:

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	st.d	zero, a0, 0

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	st.d	zero, a0, 8

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	st.d	zero, a0, 16

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	st.d	zero, a0, 24

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	st.d	zero, a0, 32

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	st.d	zero, a0, 40

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	st.d	zero, a0, 48

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	st.d	zero, a0, 56

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	addi.d	a0,   a0, 128

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	st.d	zero, a0, -64

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	st.d	zero, a0, -56

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	st.d	zero, a0, -48

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	st.d	zero, a0, -40

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	st.d	zero, a0, -32

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	st.d	zero, a0, -24

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	st.d	zero, a0, -16

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	st.d	zero, a0, -8

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	bne	t0,   a0, 1b

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	jr	ra

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SYM_FUNC_END(clear_page)

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EXPORT_SYMBOL(clear_page)

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.align 5

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SYM_FUNC_START(copy_page)

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	lu12i.w	t8, 1 << (PAGE_SHIFT - 12)

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	add.d	t8, t8, a0

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1:

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	ld.d	t0, a1, 0

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	ld.d	t1, a1, 8

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	ld.d	t2, a1, 16

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	ld.d	t3, a1, 24

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	ld.d	t4, a1, 32

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	ld.d	t5, a1, 40

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	ld.d	t6, a1, 48

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	ld.d	t7, a1, 56

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	st.d	t0, a0, 0

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	st.d	t1, a0, 8

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	ld.d	t0, a1, 64

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	ld.d	t1, a1, 72

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	st.d	t2, a0, 16

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	st.d	t3, a0, 24

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	ld.d	t2, a1, 80

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	ld.d	t3, a1, 88

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	st.d	t4, a0, 32

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	st.d	t5, a0, 40

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	ld.d	t4, a1, 96

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	ld.d	t5, a1, 104

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	st.d	t6, a0, 48

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	st.d	t7, a0, 56

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	ld.d	t6, a1, 112

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	ld.d	t7, a1, 120

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	addi.d	a0, a0, 128

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	addi.d	a1, a1, 128

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	st.d	t0, a0, -64

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	st.d	t1, a0, -56

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	st.d	t2, a0, -48

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	st.d	t3, a0, -40

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	st.d	t4, a0, -32

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	st.d	t5, a0, -24

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	st.d	t6, a0, -16

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	st.d	t7, a0, -8

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	bne	t8, a0, 1b

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	jr	ra

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SYM_FUNC_END(copy_page)

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EXPORT_SYMBOL(copy_page)

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