cmc_pu2.c

U-Boot1.1.2是最为常用的嵌入式系统Bootloader

/*
 * (C) Copyright 2002
 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
 * Marius Groeger <[e-mail]>
 *
 * Modified for CMC_PU2 (removed Smart Media support) by Gary Jennejohn
 * (2004) [e-mail]
 *
 * 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 <common.h>
#include <asm/mach-types.h>
#include <asm/arch/AT91RM9200.h>

/* ------------------------------------------------------------------------- */
/*
 * Miscelaneous platform dependent initialisations
 */

int board_init (void)
{
	DECLARE_GLOBAL_DATA_PTR;

	/* Enable Ctrlc */
	console_init_f ();

	/* Correct IRDA resistor problem */
	/* Set PA23_TXD in Output */
	(AT91PS_PIO) AT91C_BASE_PIOA->PIO_OER = AT91C_PA23_TXD2;

	/* memory and cpu-speed are setup before relocation */
	/* so we do _nothing_ here */

	/* arch number of CMC_PU2-Board */
	/* gd->bd->bi_arch_number = MACH_TYPE_CMC_PU2; */
	gd->bd->bi_arch_number = 251;
	/* adress of boot parameters */
	gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;

	return 0;
}

int dram_init (void)
{
	DECLARE_GLOBAL_DATA_PTR;

	gd->bd->bi_dram[0].start = PHYS_SDRAM;
	gd->bd->bi_dram[0].size = PHYS_SDRAM_SIZE;
	return 0;
}