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9b07773f GL |
1 | /* |
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 | |
792a09eb | 9 | * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de> |
9b07773f GL |
10 | * |
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> | |
677e62f4 | 36 | #include <asm/system.h> |
9b07773f GL |
37 | |
38 | static void cache_flush (void); | |
39 | ||
9b07773f GL |
40 | int 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 | ||
49 | disable_interrupts (); | |
50 | ||
51 | /* turn off I/D-cache */ | |
52 | icache_disable(); | |
53 | dcache_disable(); | |
b3acb6cd | 54 | /* flush I/D-cache */ |
9b07773f GL |
55 | cache_flush(); |
56 | ||
57 | return 0; | |
58 | } | |
59 | ||
9b07773f GL |
60 | /* flush I/D-cache */ |
61 | static void cache_flush (void) | |
62 | { | |
63 | /* invalidate both caches and flush btb */ | |
64 | asm ("mcr p15, 0, %0, c7, c7, 0": :"r" (0)); | |
65 | /* mem barrier to sync things */ | |
66 | asm ("mcr p15, 0, %0, c7, c10, 4": :"r" (0)); | |
67 | } |