versatile.c

嵌入式试验箱S3C2410的bootloader源代码

/*
 * (C) Copyright 2002
 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
 * Marius Groeger <[e-mail]>
 *
 * (C) Copyright 2002
 * David Mueller, ELSOFT AG, <[e-mail]>
 *
 * (C) Copyright 2003
 * Texas Instruments, <www.ti.com>
 * Kshitij Gupta <[e-mail]>
 *
 * (C) Copyright 2004
 * ARM Ltd.
 * Philippe Robin, <[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>

DECLARE_GLOBAL_DATA_PTR;

void flash__init (void);
void ether__init (void);
void peripheral_power_enable (void);

#if defined(CONFIG_SHOW_BOOT_PROGRESS)
void show_boot_progress(int progress)
{
    printf("Boot reached stage %d\n", progress);
}
#endif

#define COMP_MODE_ENABLE ((unsigned int)0x0000EAEF)

static inline void delay (unsigned long loops)
{
	__asm__ volatile ("1:\n"
		"subs %0, %1, #1\n"
		"bne 1b":"=r" (loops):"0" (loops));
}

/*
 * Miscellaneous platform dependent initialisations
 */

int board_init (void)
{
	/*
	 * set clock frequency:
	 *	VERSATILE_REFCLK is 32KHz
	 *	VERSATILE_TIMCLK is 1MHz
	 */
	*(volatile unsigned int *)(VERSATILE_SCTL_BASE) |=
	  ((VERSATILE_TIMCLK << VERSATILE_TIMER1_EnSel) | (VERSATILE_TIMCLK << VERSATILE_TIMER2_EnSel) |
	   (VERSATILE_TIMCLK << VERSATILE_TIMER3_EnSel) | (VERSATILE_TIMCLK << VERSATILE_TIMER4_EnSel));

	/* arch number of Versatile Board */
	gd->bd->bi_arch_number = MACH_TYPE_VERSATILE_PB;

	/* adress of boot parameters */
	gd->bd->bi_boot_params = 0x00000100;

	gd->flags = 0;

	icache_enable ();

	flash__init ();
	ether__init ();
	return 0;
}


int misc_init_r (void)
{
	setenv("verify", "n");
	return (0);
}

/******************************
 Routine:
 Description:
******************************/
void flash__init (void)
{
}
/*************************************************************
 Routine:ether__init
 Description: take the Ethernet controller out of reset and wait
	  		   for the EEPROM load to complete.
*************************************************************/
void ether__init (void)
{
}

/******************************
 Routine:
 Description:
******************************/
int dram_init (void)
{
	return 0;
}