Date: Sun, 21 Feb 2010 11:21:20 +0100 From: Matthias Kaehlcke matthias@kaehlcke.net Subject: Re: [U-Boot] building and updating u-boot on redboot based board To: Vipul Jain vipulsj@gmail.com Cc: u-boot@lists.denx.de Message-ID: <20100221102120.GR20201@darwin
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Hi,
El Sat, Feb 20, 2010 at 05:31:48PM -0800 Vipul Jain ha dit:
- How to know if u-boot image I have build is build correctly?
the image is build correctly if the file u-boot.bin is generated. another question is if this image is appropriate for your board
- I have redboot on my EP9302 SOC (Cirrus logic), can I load u-boot in
memory and test if it works? What will be the memory address I need to download the image?
in order to start U-Boot from RAM you must define CONFIG_SKIP_LOWLEVEL_INIT and CONFIG_SKIP_RELOCATE_UBOOT. the memory address depends on your board. for a edb9302 try 0x01000000, for edb9302a 0xc1000000
be aware that even if the U-Boot image starts from RAM this doesn't mean automatically that it will boot on your board. when booting from RAM low-level initialization is skipped (i.e. the environment set up by redboot is used), when U-Boot boots from flash it is in charge to do the low-level init.
- How can I burn the u-boot image if I find every thing ok?
if your board is a Cirrus Logic edb9302, refer to the paragraph "Download Utility" in chapter 7 of the technical reference manual. otherwise consult the manual provided by your board manufacturer.
i think you could skip step 2 (try to load U-Boot from RAM), as you can always restore your RedBoot bootloader using the same procedure as for flashing the U-Boot image
btw, which version of U-Boot are you using, the current development version or a custom one?
best regards
-- Matthias Kaehlcke Embedded Linux Developer Barcelona
Hi Matthias,
I am using the latest source of u-boot that I have gitted from git:// git.denx.de/u-boot.git here. Can you please also tell me how to find out memory address for any particular board to download u-boot image. either from u-boot source or from board specific technical manual (PRM).
Also, I did tried last night the following command and now board is not responding to anything, Is there any way to recover the board back either via software/jumper setting or JTAG. if JTAG I am not sure which one and how to go about it, if there any pointer to these. I really appreciate your help, in making newbies learn.
RedBoot> load -r -v -b 0x100000 -h 192.168.15.6 u-boot.bin -
Raw file loaded 0x00100000-0x00119ee7, assumed entry at 0x00100000 RedBoot> fis write -f 0x60000000 -b 0x100000 -l 0x40000 <------------------------ I gave this number from some website
how to find this number ??
* CAUTION * about to program FLASH at 0x60000000..0x6003ffff from 0x00100000 - continue (y/n)? y ... Erase from 0x60000000-0x60040000: .. ... Program from 0x00100000-0x00140000 at 0x60000000: .. RedBoot> reset ... Resetting.
Regards, Vipul.