cache.c

使用广泛的日本著名的开源嵌入式实时操作系统T-Kernel的源码

/*
 *----------------------------------------------------------------------
 *    T-Kernel
 *
 *    Copyright (C) 2004-2006 by Ken Sakamura. All rights reserved.
 *    T-Kernel is distributed under the T-License.
 *----------------------------------------------------------------------
 *
 *    Version:   1.02.02
 *    Released by T-Engine Forum(http://www.t-engine.org) at 2006/8/9.
 *
 *----------------------------------------------------------------------
 */

/*
 *	cache.c (M32104)
 *	Cache Operation
 */

#include <basic.h>
#include <tk/tkernel.h>
#include <tk/sysdef.h>

/*
 * Cache flush
 *	Flush cache between 'laddr' and 'len' bytes areas.
 *	Writeback and disable cache
 */
EXPORT void FlushCacheM( VP laddr, INT len, UINT mode )
{
	UINT	imask;
	UW	mccr = 0;

	if ( (mode & TCM_ICACHE) != 0 ) {
		mccr |= CC_IIV;
	}
	if ( (mode & TCM_DCACHE) != 0 ) {
		mccr |= CC_DCB|CC_DIV;
	}

	DI(imask);

	/* Instruction and data cache are controlled at the same time. */
	*(_UW*)CC_MCCR |= mccr;

	EI(imask);
}

EXPORT void FlushCache( VP laddr, INT len )
{
	FlushCacheM(laddr, len, TCM_ICACHE|TCM_DCACHE);
}