mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-19 11:18:28 +00:00
65 lines
1.6 KiB
ArmAsm
65 lines
1.6 KiB
ArmAsm
/*
|
|
* Low-level initialization for EP93xx
|
|
*
|
|
* Copyright (C) 2009 Matthias Kaehlcke <matthias@kaehlcke.net>
|
|
*
|
|
* Copyright (C) 2006 Dominic Rath <Dominic.Rath@gmx.de>
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <version.h>
|
|
#include <asm/arch/ep93xx.h>
|
|
|
|
.globl lowlevel_init
|
|
lowlevel_init:
|
|
/* backup return address */
|
|
ldr r1, =SYSCON_SCRATCH0
|
|
str lr, [r1]
|
|
|
|
/* Turn on both LEDs */
|
|
bl red_LED_on
|
|
bl green_LED_on
|
|
|
|
/* Configure flash wait states before we switch to the PLL */
|
|
bl flash_cfg
|
|
|
|
/* Set up PLL */
|
|
bl pll_cfg
|
|
|
|
/* Turn off the Green LED and leave the Red LED on */
|
|
bl green_LED_off
|
|
|
|
/* Setup SDRAM */
|
|
bl sdram_cfg
|
|
|
|
/* Turn on Green LED, Turn off the Red LED */
|
|
bl green_LED_on
|
|
bl red_LED_off
|
|
|
|
/* FIXME: we use async mode for now */
|
|
mrc p15, 0, r0, c1, c0, 0
|
|
orr r0, r0, #0xc0000000
|
|
mcr p15, 0, r0, c1, c0, 0
|
|
|
|
/* restore return address */
|
|
ldr r1, =SYSCON_SCRATCH0
|
|
ldr lr, [r1]
|
|
|
|
mov pc, lr
|