1 /*
2 * (C) Copyright 2002
3 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
4 * Marius Groeger <mgroeger@sysgo.de>
5 *
6 * (C) Copyright 2002
7 * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
8 *
9 * See file CREDITS for list of people who contributed to this
10 * project.
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License as
14 * published by the Free Software Foundation; either version 2 of
15 * the License, or (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
25 * MA 02111-1307 USA
26 */
27
28 /*
29 * CPU specific code
30 */
31
32 #include <common.h>
33 #include <command.h>
34 #include <asm/system.h>
35
36 static void cache_flush(void);
37
cleanup_before_linux(void)38 int cleanup_before_linux (void)
39 {
40 /*
41 * this function is called just before we call linux
42 * it prepares the processor for linux
43 *
44 * we turn off caches etc ...
45 */
46
47 disable_interrupts ();
48
49
50 /* turn off I/D-cache */
51 icache_disable();
52 dcache_disable();
53 /* flush I/D-cache */
54 cache_flush();
55
56 return 0;
57 }
58
59 /* flush I/D-cache */
cache_flush(void)60 static void cache_flush (void)
61 {
62 unsigned long i = 0;
63
64 asm ("mcr p15, 0, %0, c7, c7, 0": :"r" (i));
65 }
66