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Matthias Kaehlcke195dbd12010-02-01 21:29:39 +01001/*
2 * Low-level initialization for EP93xx
3 *
4 * Copyright (C) 2009 Matthias Kaehlcke <matthias@kaehlcke.net>
5 *
6 * Copyright (C) 2006 Dominic Rath <Dominic.Rath@gmx.de>
7 *
8 * See file CREDITS for list of people who contributed to this
9 * project.
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of
14 * the License, or (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
24 * MA 02111-1307 USA
25 */
26
27#include <version.h>
28#include <asm/arch/ep93xx.h>
29
30.globl lowlevel_init
31lowlevel_init:
32 /* backup return address */
33 ldr r1, =SYSCON_SCRATCH0
34 str lr, [r1]
35
36 /* Turn on both LEDs */
37 bl red_LED_on
38 bl green_LED_on
39
40 /* Configure flash wait states before we switch to the PLL */
41 bl flash_cfg
42
43 /* Set up PLL */
44 bl pll_cfg
45
46 /* Turn off the Green LED and leave the Red LED on */
47 bl green_LED_off
48
49 /* Setup SDRAM */
50 bl sdram_cfg
51
52 /* Turn on Green LED, Turn off the Red LED */
53 bl green_LED_on
54 bl red_LED_off
55
56 /* FIXME: we use async mode for now */
57 mrc p15, 0, r0, c1, c0, 0
58 orr r0, r0, #0xc0000000
59 mcr p15, 0, r0, c1, c0, 0
60
61 /* restore return address */
62 ldr r1, =SYSCON_SCRATCH0
63 ldr lr, [r1]
64
65 mov pc, lr