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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/m68k/coldfire/cache.c
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// SPDX-License-Identifier: GPL-2.0

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/***************************************************************************/

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/*

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 *	cache.c -- general ColdFire Cache maintenance code

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 *

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 *	Copyright (C) 2010, Greg Ungerer ([email protected])

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 */

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/***************************************************************************/

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#include <linux/kernel.h>

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#include <asm/coldfire.h>

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#include <asm/mcfsim.h>

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/***************************************************************************/

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#ifdef CACHE_PUSH

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/***************************************************************************/

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/*

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 *	Use cpushl to push all dirty cache lines back to memory.

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 *	Older versions of GAS don't seem to know how to generate the

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 *	ColdFire cpushl instruction... Oh well, bit stuff it for now.

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 */

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void mcf_cache_push(void)

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{

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	__asm__ __volatile__ (

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		"clrl	%%d0\n\t"

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		"1:\n\t"

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		"movel	%%d0,%%a0\n\t"

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		"2:\n\t"

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		".word	0xf468\n\t"

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		"addl	%0,%%a0\n\t"

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		"cmpl	%1,%%a0\n\t"

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		"blt	2b\n\t"

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		"addql	#1,%%d0\n\t"

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		"cmpil	%2,%%d0\n\t"

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		"bne	1b\n\t"

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		: /* No output */

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		: "i" (CACHE_LINE_SIZE),

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		  "i" (DCACHE_SIZE / CACHE_WAYS),

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		  "i" (CACHE_WAYS)

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		: "d0", "a0" );

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}

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/***************************************************************************/

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#endif /* CACHE_PUSH */

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/***************************************************************************/

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