50 lines
1.3 KiB
C
50 lines
1.3 KiB
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
/***************************************************************************/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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 */
|
||
|
|
/***************************************************************************/
|