1/***************************************************************************/
2
3/*
4 *	cache.c -- general ColdFire Cache maintenance code
5 *
6 *	Copyright (C) 2010, Greg Ungerer (gerg@snapgear.com)
7 */
8
9/***************************************************************************/
10
11#include <linux/kernel.h>
12#include <asm/coldfire.h>
13#include <asm/mcfsim.h>
14
15/***************************************************************************/
16#ifdef CACHE_PUSH
17/***************************************************************************/
18
19/*
20 *	Use cpushl to push all dirty cache lines back to memory.
21 *	Older versions of GAS don't seem to know how to generate the
22 *	ColdFire cpushl instruction... Oh well, bit stuff it for now.
23 */
24
25void mcf_cache_push(void)
26{
27	__asm__ __volatile__ (
28		"clrl	%%d0\n\t"
29		"1:\n\t"
30		"movel	%%d0,%%a0\n\t"
31		"2:\n\t"
32		".word	0xf468\n\t"
33		"addl	%0,%%a0\n\t"
34		"cmpl	%1,%%a0\n\t"
35		"blt	2b\n\t"
36		"addql	#1,%%d0\n\t"
37		"cmpil	%2,%%d0\n\t"
38		"bne	1b\n\t"
39		: /* No output */
40		: "i" (CACHE_LINE_SIZE),
41		  "i" (DCACHE_SIZE / CACHE_WAYS),
42		  "i" (CACHE_WAYS)
43		: "d0", "a0" );
44}
45
46/***************************************************************************/
47#endif /* CACHE_PUSH */
48/***************************************************************************/
49