source: SVN/rincon/u-boot/board/shannon/lowlevel_init.S @ 55

Last change on this file since 55 was 55, checked in by Tim Harvey, 22 months ago

rincon: added latest u-boot source

restored form server backup

Signed-off-by: Tim Harvey <tharvey@…>

File size: 2.1 KB
Line 
1/*
2 * Memory Setup stuff - taken from blob memsetup.S
3 *
4 * Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl) and
5 *                     Jan-Derk Bakker (J.D.Bakker@its.tudelft.nl)
6 *
7 * See file CREDITS for list of people who contributed to this
8 * project.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of
13 * the License, or (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
23 * MA 02111-1307 USA
24 */
25
26
27#include <config.h>
28#include <version.h>
29
30
31/* some parameters for the board */
32
33MEM_BASE:       .long   0xa0000000
34MEM_START:      .long   0xc0000000
35
36#define MDCNFG  0x00
37#define MDCAS0  0x04
38#define MDCAS1  0x08
39#define MDCAS2  0x0c
40#define MSC0    0x10
41#define MSC1    0x14
42#define MECR    0x18
43
44mdcas0:         .long   0xc71c703f @ cccccccf
45mdcas1:         .long   0xffc71c71 @ fffffffc
46mdcas2:         .long   0xffffffff @ ffffffff
47mdcnfg:         .long   0x0334b21f @ 9326991f
48msc0:           .long   0xfff84458 @ 42304230
49msc1:           .long   0xffffffff @ 20182018
50mecr:           .long   0x7fff7fff @ 01000000
51
52/* setting up the memory */
53
54.globl lowlevel_init
55lowlevel_init:
56        ldr     r0, MEM_BASE
57
58        /* Setup the flash memory */
59        ldr     r1, msc0
60        str     r1, [r0, #MSC0]
61
62        /* Set up the DRAM */
63
64        /* MDCAS0 */
65        ldr     r1, mdcas0
66        str     r1, [r0, #MDCAS0]
67
68        /* MDCAS1 */
69        ldr     r1, mdcas1
70        str     r1, [r0, #MDCAS1]
71
72        /* MDCAS2 */
73        ldr     r1, mdcas2
74        str     r1, [r0, #MDCAS2]
75
76        /* MDCNFG */
77        ldr     r1, mdcnfg
78        str     r1, [r0, #MDCNFG]
79
80        /* Set up PCMCIA space */
81        ldr     r1, mecr
82        str     r1, [r0, #MECR]
83
84        /* Load something to activate bank */
85        ldr     r1, MEM_START
86
87.rept   8
88        ldr     r0, [r1]
89.endr
90
91        /* everything is fine now */
92        mov     pc, lr
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