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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/powerpc/lib/quad.S
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/* SPDX-License-Identifier: GPL-2.0-or-later */

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/*

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 * Quadword loads and stores

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 * for use in instruction emulation.

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 *

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 * Copyright 2017 Paul Mackerras, IBM Corp. <[email protected]>

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 */

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#include <asm/processor.h>

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#include <asm/ppc_asm.h>

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#include <asm/ppc-opcode.h>

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#include <asm/reg.h>

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#include <asm/asm-offsets.h>

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#include <linux/errno.h>

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/* do_lq(unsigned long ea, unsigned long *regs) */

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_GLOBAL(do_lq)

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1:	lq	r6, 0(r3)

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	std	r6, 0(r4)

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	std	r7, 8(r4)

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	li	r3, 0

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	blr

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2:	li	r3, -EFAULT

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	blr

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	EX_TABLE(1b, 2b)

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/* do_stq(unsigned long ea, unsigned long val0, unsigned long val1) */

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_GLOBAL(do_stq)

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1:	stq	r4, 0(r3)

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	li	r3, 0

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	blr

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2:	li	r3, -EFAULT

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	blr

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	EX_TABLE(1b, 2b)

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/* do_lqarx(unsigned long ea, unsigned long *regs) */

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_GLOBAL(do_lqarx)

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1:	PPC_LQARX(6, 0, 3, 0)

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	std	r6, 0(r4)

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	std	r7, 8(r4)

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	li	r3, 0

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	blr

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2:	li	r3, -EFAULT

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	blr

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	EX_TABLE(1b, 2b)

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/* do_stqcx(unsigned long ea, unsigned long val0, unsigned long val1,

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	    unsigned int *crp) */

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_GLOBAL(do_stqcx)

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1:	PPC_STQCX(4, 0, 3)

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	mfcr	r5

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	stw	r5, 0(r6)

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	li	r3, 0

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	blr

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2:	li	r3, -EFAULT

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	blr

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	EX_TABLE(1b, 2b)

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