From: Marco Cavallini <arm.linux@koansoftware.com>
To: u-boot@lists.denx.de
Subject: [U-Boot-Users] AT91 u-boot lowlevel init Dataflash
Date: Mon, 05 Jun 2006 18:43:18 +0200 [thread overview]
Message-ID: <44845F26.90504@koansoftware.com> (raw)
Hi,
I am trying to use u-boot-1.1.4 with AT91RM9200 based board.
Using Parallel flash all works perfectly, but if I try using u-boot
stored in Dataflash i face to some problems and comparing two cases I
see that CPU clock are different.
Seems that is required a RomBoot provided by Atmel which launch u-boot.
Is it really necessary ?
Maybe I've miss an option that avoid RomBoot usage ?
CONFIG_SKIP_LOWLEVEL_INIT seems used only with parallel flash, what when
using Dataflash ?
Boot from Dataflash : define CONFIG_SKIP_LOWLEVEL_INIT 1
Machine: Atmel AT91RM9200
Memory policy: ECC disabled, Data cache writeback
Clocks: CPU 59 MHz, master 59 MHz, main 18.432 MHz
^^^^^^^^^^
Boot from Parallel flash : undef CONFIG_SKIP_LOWLEVEL_INIT
Machine: Atmel AT91RM9200
Memory policy: ECC disabled, Data cache writeback
Clocks: CPU 179 MHz, master 59 MHz, main 18.432 MHz
^^^^^^^^^^
Every hint will be appreciated
TIA
--
Marco Cavallini
Koan s.a.s. - Bergamo - ITALIA
Embedded and Real-Time Software Engineering
www.KoanSoftware.com | www.KaeilOS.com
Informativa D.Lgs 196/2003 (Privacy)
http://www.koansoftware.com/it/prf_privacy.htm
next reply other threads:[~2006-06-05 16:43 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-05 16:43 Marco Cavallini [this message]
2006-06-06 8:10 ` [U-Boot-Users] AT91 u-boot lowlevel init Dataflash Andreas Schweigstill
2006-06-06 8:38 ` Marco Cavallini
2006-06-06 9:42 ` Marco Cavallini
2006-06-06 10:02 ` Peter Menzebach
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