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wdenk8ed96042005-01-09 23:16:25 +00001/*
2 * (C) Copyright 2004 Texas Insturments
3 *
4 * (C) Copyright 2002
5 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
6 * Marius Groeger <mgroeger@sysgo.de>
7 *
8 * (C) Copyright 2002
Detlev Zundel792a09e2009-05-13 10:54:10 +02009 * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
wdenk8ed96042005-01-09 23:16:25 +000010 *
11 * See file CREDITS for list of people who contributed to this
12 * project.
13 *
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License as
16 * published by the Free Software Foundation; either version 2 of
17 * the License, or (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
27 * MA 02111-1307 USA
28 */
29
30/*
31 * CPU specific code
32 */
33
34#include <common.h>
35#include <command.h>
Jean-Christophe PLAGNIOL-VILLARD677e62f2009-04-05 13:02:43 +020036#include <asm/system.h>
wdenk8ed96042005-01-09 23:16:25 +000037
Jean-Christophe PLAGNIOL-VILLARDb3acb6c2009-04-05 13:06:31 +020038static void cache_flush(void);
wdenk8ed96042005-01-09 23:16:25 +000039
wdenk8ed96042005-01-09 23:16:25 +000040int cleanup_before_linux (void)
41{
42 /*
43 * this function is called just before we call linux
44 * it prepares the processor for linux
45 *
46 * we turn off caches etc ...
47 */
48
wdenk8ed96042005-01-09 23:16:25 +000049 disable_interrupts ();
50
51#ifdef CONFIG_LCD
52 {
53 extern void lcd_disable(void);
54 extern void lcd_panel_disable(void);
55
56 lcd_disable(); /* proper disable of lcd & panel */
57 lcd_panel_disable();
58 }
59#endif
60
61 /* turn off I/D-cache */
Jean-Christophe PLAGNIOL-VILLARDb3acb6c2009-04-05 13:06:31 +020062 icache_disable();
63 dcache_disable();
wdenk8ed96042005-01-09 23:16:25 +000064 /* flush I/D-cache */
Jean-Christophe PLAGNIOL-VILLARDb3acb6c2009-04-05 13:06:31 +020065 cache_flush();
66
67 return 0;
wdenk8ed96042005-01-09 23:16:25 +000068}
69
Jean-Christophe PLAGNIOL-VILLARDb3acb6c2009-04-05 13:06:31 +020070static void cache_flush(void)
wdenk8ed96042005-01-09 23:16:25 +000071{
Jean-Christophe PLAGNIOL-VILLARDb3acb6c2009-04-05 13:06:31 +020072 unsigned long i = 0;
wdenk8ed96042005-01-09 23:16:25 +000073
George G. Davis409a07c2010-05-11 10:15:36 -040074 asm ("mcr p15, 0, %0, c7, c10, 0": :"r" (i)); /* clean entire data cache */
Jean-Christophe PLAGNIOL-VILLARDb3acb6c2009-04-05 13:06:31 +020075 asm ("mcr p15, 0, %0, c7, c7, 0": :"r" (i)); /* invalidate both caches and flush btb */
76 asm ("mcr p15, 0, %0, c7, c10, 4": :"r" (i)); /* mem barrier to sync things */
wdenk8ed96042005-01-09 23:16:25 +000077}