1// SPDX-License-Identifier: GPL-2.0
 2/***************************************************************************/
 3
 4/*
 5 *	cache.c -- general ColdFire Cache maintenance code
 6 *
 7 *	Copyright (C) 2010, Greg Ungerer (gerg@snapgear.com)
 8 */
 9
10/***************************************************************************/
11
12#include <linux/kernel.h>
13#include <asm/coldfire.h>
14#include <asm/mcfsim.h>
15
16/***************************************************************************/
17#ifdef CACHE_PUSH
18/***************************************************************************/
19
20/*
21 *	Use cpushl to push all dirty cache lines back to memory.
22 *	Older versions of GAS don't seem to know how to generate the
23 *	ColdFire cpushl instruction... Oh well, bit stuff it for now.
24 */
25
26void mcf_cache_push(void)
27{
28	__asm__ __volatile__ (
29		"clrl	%%d0\n\t"
30		"1:\n\t"
31		"movel	%%d0,%%a0\n\t"
32		"2:\n\t"
33		".word	0xf468\n\t"
34		"addl	%0,%%a0\n\t"
35		"cmpl	%1,%%a0\n\t"
36		"blt	2b\n\t"
37		"addql	#1,%%d0\n\t"
38		"cmpil	%2,%%d0\n\t"
39		"bne	1b\n\t"
40		: /* No output */
41		: "i" (CACHE_LINE_SIZE),
42		  "i" (DCACHE_SIZE / CACHE_WAYS),
43		  "i" (CACHE_WAYS)
44		: "d0", "a0" );
45}
46
47/***************************************************************************/
48#endif /* CACHE_PUSH */
49/***************************************************************************/

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