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

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/*

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 * Hibernation support specific for LoongArch

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 *

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 * Author: Huacai Chen <[email protected]>

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

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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/asm-offsets.h>

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#include <asm/regdef.h>

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.text

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SYM_FUNC_START(swsusp_asm_suspend)

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	la.pcrel	t0, saved_regs

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	PTR_S		ra, t0, PT_R1

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	PTR_S		tp, t0, PT_R2

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	PTR_S		sp, t0, PT_R3

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	PTR_S		u0, t0, PT_R21

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	PTR_S		fp, t0, PT_R22

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	PTR_S		s0, t0, PT_R23

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	PTR_S		s1, t0, PT_R24

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	PTR_S		s2, t0, PT_R25

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	PTR_S		s3, t0, PT_R26

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	PTR_S		s4, t0, PT_R27

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	PTR_S		s5, t0, PT_R28

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	PTR_S		s6, t0, PT_R29

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	PTR_S		s7, t0, PT_R30

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	PTR_S		s8, t0, PT_R31

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	b		swsusp_save

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SYM_FUNC_END(swsusp_asm_suspend)

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SYM_FUNC_START(swsusp_asm_resume)

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	la.pcrel	t0, restore_pblist

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	PTR_L		t0, t0, 0

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0:

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	PTR_L		t1, t0, PBE_ADDRESS  /* source */

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	PTR_L		t2, t0, PBE_ORIG_ADDRESS /* destination */

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	PTR_LI		t3, _PAGE_SIZE

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	PTR_ADD		t3, t3, t1

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1:

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	REG_L		t8, t1, 0

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	REG_S		t8, t2, 0

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	PTR_ADDI	t1, t1, SZREG

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	PTR_ADDI	t2, t2, SZREG

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	bne		t1, t3, 1b

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	PTR_L		t0, t0, PBE_NEXT

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	bnez		t0, 0b

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	la.pcrel	t0, saved_regs

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	PTR_L		ra, t0, PT_R1

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	PTR_L		tp, t0, PT_R2

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	PTR_L		sp, t0, PT_R3

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	PTR_L		u0, t0, PT_R21

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	PTR_L		fp, t0, PT_R22

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	PTR_L		s0, t0, PT_R23

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	PTR_L		s1, t0, PT_R24

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	PTR_L		s2, t0, PT_R25

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	PTR_L		s3, t0, PT_R26

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	PTR_L		s4, t0, PT_R27

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	PTR_L		s5, t0, PT_R28

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	PTR_L		s6, t0, PT_R29

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	PTR_L		s7, t0, PT_R30

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	PTR_L		s8, t0, PT_R31

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	PTR_LI		a0, 0x0

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	jirl		zero, ra, 0

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SYM_FUNC_END(swsusp_asm_resume)

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