amx860.c

AT91RM9200的完整启动代码：包括loader, boot及U-boot三部分均已编译通过！欢迎下载使用！

/*
 * (C) Copyright 2001
 * Wolfgang Denk, DENX Software Engineering, [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 <config.h>
#include <mpc8xx.h>

/* ------------------------------------------------------------------------- */

#define	_NOT_USED_	0xFFFFFFFF

const uint edo_60ns[] =
{ 0x8ffbec24, 0x0ff3ec04, 0x0cf3ec04, 0x00f3ec04,
  0x00f3ec00, 0x37f7ec47, _NOT_USED_, _NOT_USED_,
  0x8fffec24, 0x0ffbec04, 0x08f3ec04, 0x07f3ec08,
  0x08f3ec04, 0x07f3ec48, 0x08f3ec04, 0x07f3ec48,
  0x08f3ec04, 0x07f3ec48, 0x1ff7ec47, _NOT_USED_,
  _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
  0x8fffcc24, 0x0fefcc04, 0x0cafcc00, 0x11bfcc47,
  _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
  0x8fffcc24, 0x0fefcc04, 0x0cafcc00, 0x03afcc4c,
  0x0cafcc00, 0x03afcc4c, 0x0cafcc00, 0x03afcc4c,
  0x0cafcc00, 0x33bfcc4f, _NOT_USED_, _NOT_USED_,
  _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
  0xc0ffcc84, 0x00ffcc04, 0x07ffcc04, 0x3fffcc06,
  0xffffcc85, 0xffffcc05, _NOT_USED_, _NOT_USED_,
  _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
  0x33ffcc07, _NOT_USED_, _NOT_USED_, _NOT_USED_ };

/* ------------------------------------------------------------------------- */

/*
 * Check Board Identity:
 */

int checkboard (void)
{
	puts ("Board: AMX860\n");
	return 0;
}

/* ------------------------------------------------------------------------- */

long int initdram (int board_type)
{

	volatile immap_t     *immap = (immap_t *)CFG_IMMR;
	volatile memctl8xx_t *memctl = &immap->im_memctl;

	/* AMX860: has 4 Mb of 60ns EDO DRAM, so start DRAM at 0 */

	upmconfig(UPMA, (uint *) edo_60ns, sizeof(edo_60ns)/sizeof(uint));

#ifndef CONFIG_AMX_RAM_EXT
	memctl->memc_mptpr = 0x0400; /* divide by 16 */
#else
	memctl->memc_mptpr = 0x0200;
#endif

	memctl->memc_mamr = 0x30a21114;
	memctl->memc_or2 = 0xffc00800;
#ifndef CONFIG_AMX_RAM_EXT
	memctl->memc_br2 = 0x81;

	return (4 << 20);
#else
	memctl->memc_or1 = 0xff000800;
	memctl->memc_br1 = 0x00000081;
	memctl->memc_br2 = 0x01000081;

	return (20 << 20);
#endif
}