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wdenk6f213472003-08-29 22:00:43 +00001/*
2 * (C) Copyright 2002
3 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
4 * Marius Groeger <mgroeger@sysgo.de>
5 *
6 * (C) Copyright 2002
Detlev Zundel792a09e2009-05-13 10:54:10 +02007 * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
wdenk6f213472003-08-29 22:00:43 +00008 *
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>
Jean-Christophe PLAGNIOL-VILLARD677e62f2009-04-05 13:02:43 +020034#include <asm/system.h>
wdenk6f213472003-08-29 22:00:43 +000035
Jean-Christophe PLAGNIOL-VILLARDb3acb6c2009-04-05 13:06:31 +020036static void cache_flush(void);
wdenk6f213472003-08-29 22:00:43 +000037
wdenk6f213472003-08-29 22:00:43 +000038int 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
wdenk6f213472003-08-29 22:00:43 +000047 disable_interrupts ();
48
Jean-Christophe PLAGNIOL-VILLARDb3acb6c2009-04-05 13:06:31 +020049
wdenk6f213472003-08-29 22:00:43 +000050 /* turn off I/D-cache */
Jean-Christophe PLAGNIOL-VILLARDb3acb6c2009-04-05 13:06:31 +020051 icache_disable();
52 dcache_disable();
Michael Walle67953022012-02-06 22:42:10 +053053 l2_cache_disable();
54
wdenk6f213472003-08-29 22:00:43 +000055 /* flush I/D-cache */
Jean-Christophe PLAGNIOL-VILLARDb3acb6c2009-04-05 13:06:31 +020056 cache_flush();
Wolfgang Denk74f43042005-09-25 01:48:28 +020057
Jean-Christophe PLAGNIOL-VILLARDb3acb6c2009-04-05 13:06:31 +020058 return 0;
wdenk6f213472003-08-29 22:00:43 +000059}
60
Jean-Christophe PLAGNIOL-VILLARDb3acb6c2009-04-05 13:06:31 +020061/* flush I/D-cache */
62static void cache_flush (void)
wdenk6f213472003-08-29 22:00:43 +000063{
Jean-Christophe PLAGNIOL-VILLARDb3acb6c2009-04-05 13:06:31 +020064 unsigned long i = 0;
wdenk6f213472003-08-29 22:00:43 +000065
Jean-Christophe PLAGNIOL-VILLARDb3acb6c2009-04-05 13:06:31 +020066 asm ("mcr p15, 0, %0, c7, c7, 0": :"r" (i));
wdenk6f213472003-08-29 22:00:43 +000067}