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/***************************************************************************/
/*
* cache.c -- general ColdFire Cache maintenance code
*
* Copyright (C) 2010, Greg Ungerer (gerg@snapgear.com)
*/
/***************************************************************************/
#include <linux/kernel.h>
#include <asm/coldfire.h>
#include <asm/mcfsim.h>
/***************************************************************************/
#ifdef CACHE_PUSH
/***************************************************************************/
/*
* Use cpushl to push all dirty cache lines back to memory.
* Older versions of GAS don't seem to know how to generate the
* ColdFire cpushl instruction... Oh well, bit stuff it for now.
*/
void mcf_cache_push(void)
{
__asm__ __volatile__ (
"clrl %%d0\n\t"
"1:\n\t"
"movel %%d0,%%a0\n\t"
"2:\n\t"
".word 0xf468\n\t"
"addl %0,%%a0\n\t"
"cmpl %1,%%a0\n\t"
"blt 2b\n\t"
"addql #1,%%d0\n\t"
"cmpil %2,%%d0\n\t"
"bne 1b\n\t"
: /* No output */
: "i" (CACHE_LINE_SIZE),
"i" (DCACHE_SIZE / CACHE_WAYS),
"i" (CACHE_WAYS)
: "d0", "a0" );
}
/***************************************************************************/
#endif /* CACHE_PUSH */
/***************************************************************************/
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