[U-Boot] Booting from NAND on MX51

Thu Feb 11 11:25:28 CET 2010

Hi Eric,

Thank you for the information. Yes, I have found 2 DCD errors when comparing RedBood DCDs with u-boot DCDs,
I fixed those error and now the MX51 ROM boot loader copies the u-boot code into RAM. 
Someone will need to double check those in Redboot with those in u-boot and update the u-boot code. 
See below the flash_header.S file that I am using.

Now the system copies code from NAND but crashes somewhere at the early stage.
Are any more switches that might need to be turned "on", or "off" in the mx51_3stack config file?

Regards,
Andreas

/*
 * Copyright 2009 Freescale Semiconductor, Inc.
 *
 * 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 <config.h>
#include <asm/arch/mx51.h>
#include "board-mx51_3stack.h"

#ifdef	CONFIG_FLASH_HEADER
#ifndef CONFIG_FLASH_HEADER_OFFSET
# error "Must define the offset of flash header"
#endif
#define MXC_DCD_ITEM(i, type, addr, val)	\
dcd_node_##i:					\
	.word type			;	\
	.word addr			;	\
	.word val			;	\

.section ".text.flasheader", "x"
	b	_start
	.org	CONFIG_FLASH_HEADER_OFFSET
app_code_jump_v:	.word	_start
app_code_code_barker:	.word	CONFIG_FLASH_HEADER_BARKER
app_code_csf:		.word	(TEXT_BASE + 0x40000 - 0x1000)       //0
dcd_ptr_ptr:		.word	dcd_ptr
super_root_key:		.word	0
dcd_ptr:		.word	dcd_array_start
app_dest_ptr:		.word	TEXT_BASE
dcd_array_start:
magic:			.word	0xB17219E9
dcd_array_size:		.word	dcd_data_end - dcd_array_start - 8
/* DCD */
/* DDR2 IOMUX configuration */
MXC_DCD_ITEM(1, 4, IOMUXC_BASE_ADDR + 0x8a0, 0x200)
MXC_DCD_ITEM(2, 4, IOMUXC_BASE_ADDR + 0x50c, 0x20c5)
MXC_DCD_ITEM(3, 4, IOMUXC_BASE_ADDR + 0x510, 0x20c5)
MXC_DCD_ITEM(4, 4, IOMUXC_BASE_ADDR + 0x83c, 0x2)
MXC_DCD_ITEM(5, 4, IOMUXC_BASE_ADDR + 0x848, 0x2)
MXC_DCD_ITEM(6, 4, IOMUXC_BASE_ADDR + 0x4b8, 0xe7)
MXC_DCD_ITEM(7, 4, IOMUXC_BASE_ADDR + 0x4bc, 0x45)
MXC_DCD_ITEM(8, 4, IOMUXC_BASE_ADDR + 0x4c0, 0x45)
MXC_DCD_ITEM(9, 4, IOMUXC_BASE_ADDR + 0x4c4, 0x45)
MXC_DCD_ITEM(10, 4, IOMUXC_BASE_ADDR + 0x4c8, 0x45)
MXC_DCD_ITEM(11, 4, IOMUXC_BASE_ADDR + 0x820, 0x0)
MXC_DCD_ITEM(12, 4, IOMUXC_BASE_ADDR + 0x4a4, 0x3)
MXC_DCD_ITEM(13, 4, IOMUXC_BASE_ADDR + 0x4a8, 0x3)
MXC_DCD_ITEM(14, 4, IOMUXC_BASE_ADDR + 0x4ac, 0xe3)
MXC_DCD_ITEM(15, 4, IOMUXC_BASE_ADDR + 0x4b0, 0xe3)
MXC_DCD_ITEM(16, 4, IOMUXC_BASE_ADDR + 0x4b4, 0xe3)
MXC_DCD_ITEM(17, 4, IOMUXC_BASE_ADDR + 0x4cc, 0xe3)
MXC_DCD_ITEM(18, 4, IOMUXC_BASE_ADDR + 0x4d0, 0xe2)
/* Set drive strength to MAX */
#if 0
MXC_DCD_ITEM(19, 4, IOMUXC_BASE_ADDR + 0x82c, 0x6)
MXC_DCD_ITEM(20, 4, IOMUXC_BASE_ADDR + 0x8a4, 0x6)
MXC_DCD_ITEM(21, 4, IOMUXC_BASE_ADDR + 0x8ac, 0x6)
MXC_DCD_ITEM(22, 4, IOMUXC_BASE_ADDR + 0x8b8, 0x6)
#endif
/* 13 ROW, 10 COL, 32Bit, SREF=4 Micron Model */
/* CAS=3,  BL=4 */
MXC_DCD_ITEM(19, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDCTL0, 0x82a20000)
MXC_DCD_ITEM(20, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDCTL1, 0x82a20000)
MXC_DCD_ITEM(21, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDMISC, 0x000ad0d0)
MXC_DCD_ITEM(22, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDCFG0, 0x333574aa)
MXC_DCD_ITEM(23, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDCFG1, 0x333574aa)
/* Init DRAM on CS0 */
MXC_DCD_ITEM(24, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x04008008)
MXC_DCD_ITEM(25, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x0000801a)
MXC_DCD_ITEM(26, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x0000801b)
MXC_DCD_ITEM(27, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x00008019)  /* error*/
MXC_DCD_ITEM(28, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x07328018)
MXC_DCD_ITEM(29, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x04008008)
MXC_DCD_ITEM(30, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x00008010)
MXC_DCD_ITEM(31, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x00008010)
MXC_DCD_ITEM(32, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x06328018)
MXC_DCD_ITEM(33, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x03808019)
MXC_DCD_ITEM(34, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x00428019) /* error */
MXC_DCD_ITEM(35, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x00008000)
/* Init DRAM on CS1 */
MXC_DCD_ITEM(36, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x0400800c)
MXC_DCD_ITEM(37, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x0000801e)
MXC_DCD_ITEM(38, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x0000801f)
MXC_DCD_ITEM(39, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x0000801d)
MXC_DCD_ITEM(40, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x0732801c)
MXC_DCD_ITEM(41, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x0400800c)
MXC_DCD_ITEM(42, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x00008014)
MXC_DCD_ITEM(43, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x00008014)
MXC_DCD_ITEM(44, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x0632801c)
MXC_DCD_ITEM(45, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x0380801d)
MXC_DCD_ITEM(46, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x0042801d) 
MXC_DCD_ITEM(47, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x00008004)
MXC_DCD_ITEM(48, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDCTL0, 0xb2a20000)
MXC_DCD_ITEM(49, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDCTL1, 0xb2a20000)
MXC_DCD_ITEM(50, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDMISC, 0x000ad6d0)
MXC_DCD_ITEM(51, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDCDLYGD, 0x90000000)
MXC_DCD_ITEM(52, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x00000000)

MXC_DCD_ITEM(53, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDCDLY1, 0x00048000)
MXC_DCD_ITEM(54, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDCDLY2, 0x000e8000)
MXC_DCD_ITEM(55, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDCDLY3, 0x00ff8000)
MXC_DCD_ITEM(56, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDCDLY4, 0x00fa8000)
MXC_DCD_ITEM(57, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDCDLY5, 0x00ed8000)

dcd_data_end:
//image_len:		.word	0x80000
image_len:		.word	__u_boot_cmd_end - TEXT_BASE
#endif

-----Original Message-----
From: Eric Bénard [mailto:eric at eukrea.com] 
Sent: 10 February 2010 15:16
To: Andreas Orfanos
Cc: U-Boot user list
Subject: Re: [U-Boot] Booting from NAND on MX51

Hi Andreas,

Le 10/02/2010 15:55, Andreas Orfanos a écrit :
> Did you have to make changes in cpu/arm_cortex8/start.S file?
we are using u-boot-2009.01 + freescale patches.
No change to start.S (except a small hack to turn on a led to check 
u-boot is properly loaded and run).

> I don't have to make any changes on DCD table anyway, as it has already produced by freescale for mx51_3stack board
>
I started with the DCD of Redboot for 3Stack as the one for the 3Stack 
in u-boot never worked here.
If you don't manage to get it running using RedBoot DCD, come back to me 
on next thursday where I should be able to extract some patches as I'm 
actually busy on an other subject.

Eric