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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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	PTR_ADD		t0, t0, a0

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1:

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	LONG_S		zero, a0, (LONGSIZE * 0)

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	LONG_S		zero, a0, (LONGSIZE * 1)

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	LONG_S		zero, a0, (LONGSIZE * 2)

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	LONG_S		zero, a0, (LONGSIZE * 3)

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	LONG_S		zero, a0, (LONGSIZE * 4)

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	LONG_S		zero, a0, (LONGSIZE * 5)

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	LONG_S		zero, a0, (LONGSIZE * 6)

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	LONG_S		zero, a0, (LONGSIZE * 7)

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	PTR_ADDI	a0,   a0, (LONGSIZE * 16)

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	LONG_S		zero, a0, -(LONGSIZE * 8)

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	LONG_S		zero, a0, -(LONGSIZE * 7)

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	LONG_S		zero, a0, -(LONGSIZE * 6)

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	LONG_S		zero, a0, -(LONGSIZE * 5)

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	LONG_S		zero, a0, -(LONGSIZE * 4)

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	LONG_S		zero, a0, -(LONGSIZE * 3)

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	LONG_S		zero, a0, -(LONGSIZE * 2)

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	LONG_S		zero, a0, -(LONGSIZE * 1)

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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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	PTR_ADD		t8, t8, a0

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1:

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	LONG_L		t0, a1, (LONGSIZE * 0)

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	LONG_L		t1, a1, (LONGSIZE * 1)

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	LONG_L		t2, a1, (LONGSIZE * 2)

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	LONG_L		t3, a1, (LONGSIZE * 3)

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	LONG_L		t4, a1, (LONGSIZE * 4)

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	LONG_L		t5, a1, (LONGSIZE * 5)

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	LONG_L		t6, a1, (LONGSIZE * 6)

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	LONG_L		t7, a1, (LONGSIZE * 7)

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	LONG_S		t0, a0, (LONGSIZE * 0)

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	LONG_S		t1, a0, (LONGSIZE * 1)

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	LONG_L		t0, a1, (LONGSIZE * 8)

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	LONG_L		t1, a1, (LONGSIZE * 9)

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	LONG_S		t2, a0, (LONGSIZE * 2)

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	LONG_S		t3, a0, (LONGSIZE * 3)

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	LONG_L		t2, a1, (LONGSIZE * 10)

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	LONG_L		t3, a1, (LONGSIZE * 11)

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	LONG_S		t4, a0, (LONGSIZE * 4)

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	LONG_S		t5, a0, (LONGSIZE * 5)

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	LONG_L		t4, a1, (LONGSIZE * 12)

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	LONG_L		t5, a1, (LONGSIZE * 13)

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	LONG_S		t6, a0, (LONGSIZE * 6)

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	LONG_S		t7, a0, (LONGSIZE * 7)

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	LONG_L		t6, a1, (LONGSIZE * 14)

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	LONG_L		t7, a1, (LONGSIZE * 15)

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	PTR_ADDI	a0, a0, (LONGSIZE * 16)

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	PTR_ADDI	a1, a1, (LONGSIZE * 16)

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	LONG_S		t0, a0, -(LONGSIZE * 8)

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	LONG_S		t1, a0, -(LONGSIZE * 7)

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	LONG_S		t2, a0, -(LONGSIZE * 6)

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	LONG_S		t3, a0, -(LONGSIZE * 5)

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	LONG_S		t4, a0, -(LONGSIZE * 4)

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	LONG_S		t5, a0, -(LONGSIZE * 3)

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	LONG_S		t6, a0, -(LONGSIZE * 2)

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	LONG_S		t7, a0, -(LONGSIZE * 1)

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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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