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11a72d9f WD |
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 | * Sysgo Real-Time Solutions, GmbH <www.elinos.com> | |
8 | * Alex Zuepke <azu@sysgo.de> | |
9 | * | |
10 | * See file CREDITS for list of people who contributed to this | |
11 | * project. | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or | |
14 | * modify it under the terms of the GNU General Public License as | |
15 | * published by the Free Software Foundation; either version 2 of | |
16 | * the License, or (at your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | * GNU General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with this program; if not, write to the Free Software | |
25 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
26 | * MA 02111-1307 USA | |
27 | */ | |
28 | ||
29 | /* | |
30 | * CPU specific code | |
31 | */ | |
32 | ||
3ba8bf7c | 33 | #include <asm/io.h> |
677e62f4 | 34 | #include <asm/system.h> |
3ba8bf7c MV |
35 | #include <command.h> |
36 | #include <common.h> | |
2cad92fd | 37 | #include <asm/arch/pxa-regs.h> |
11a72d9f | 38 | |
b3acb6cd JCPV |
39 | static void cache_flush(void); |
40 | ||
11a72d9f WD |
41 | int cleanup_before_linux (void) |
42 | { | |
43 | /* | |
44 | * this function is called just before we call linux | |
45 | * it prepares the processor for linux | |
46 | * | |
47 | * just disable everything that can disturb booting linux | |
48 | */ | |
49 | ||
11a72d9f WD |
50 | disable_interrupts (); |
51 | ||
52 | /* turn off I-cache */ | |
b3acb6cd JCPV |
53 | icache_disable(); |
54 | dcache_disable(); | |
11a72d9f WD |
55 | |
56 | /* flush I-cache */ | |
b3acb6cd | 57 | cache_flush(); |
11a72d9f WD |
58 | |
59 | return (0); | |
60 | } | |
61 | ||
b3acb6cd JCPV |
62 | /* flush I/D-cache */ |
63 | static void cache_flush (void) | |
677e62f4 | 64 | { |
b3acb6cd | 65 | unsigned long i = 0; |
11a72d9f | 66 | |
b3acb6cd | 67 | asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (i)); |
11a72d9f | 68 | } |
71f95118 | 69 | |