Hi Anatolij, Before I attempt to burn the new image in the flash, I want to test it first. There are instruction on burning this image in to flash but
The documentation that I am looking says following:- ========================== "If U-Boot is already installed and running on your board, you can use these instructions to download another U-Boot image to replace the current one. ALERT! Warning: Before you can install the new image, you have to erase the current one. If anything goes wrong your board will be dead. It is strongly recommended that: you have a backup of the old, working U-Boot image you know how to install an image on a virgin system ALERT! Proceed as follows: " <<The rest of the instructions are for burning it in the flash.>> =========================== I am complete newbie at this. I also tried "go <load_address>" but that caused immediate crash. I am hoping that this is trivial for somebody who has updated u-boot code. If I am using wrong command, please tell me correct command to test the u-boot from RAM before burning it to the flash. Thanks, - Vikas -----Original Message----- From: Anatolij Gustschin [mailto:ag...@denx.de] Sent: Wednesday, December 07, 2011 2:59 PM To: Sontakke, Vikas Cc: U-Boot@lists.denx.de Subject: Re: [U-Boot] How to test a new u-boot image over network? Hi, On Wed, 7 Dec 2011 12:41:38 -0500 <vikas.sonta...@emc.com> wrote: ... > > uboot-sources-EMC/u-boot-2009.01> file u-boot.bin > u-boot.bin: u-boot/PPCBoot image > > uboot-sources-EMC/u-boot-2009.01> mkimage -d u-boot.bin u-boot.bin.load > Image Name: > Created: Wed Dec 7 12:08:45 2011 > Image Type: PowerPC Linux Kernel Image (gzip compressed) > Data Size: 393216 Bytes = 384.00 kB = 0.38 MB > Load Address: 0x00000000 > Entry Point: 0x00000000 > uboot-sources-EMC/u-boot-2009.01> > > > I then tftp the image "u-boot.bin.load" and bootm it but I am getting > following error. > Error: Bad gzipped data > GUNZIP: uncompress or overwrite error - must RESET board to recover Did you read the documentation? Why are you trying to boot U-Boot image using 'bootm' command? 'bootm' command is used for booting operating system images. If you want to update U-Boot on the board, you need to write it into the flash memory used for booting. Do you have a JTAG debugger for the case updating U-Boot image goes wrong for some reason? > I have tried many different load addresses such as 0x40.0000, > 0x400.0000, 0x800.0000, 0x1000.0000. with exactly the same > behaviour. What am I missing? Please read U-Boot documentation [1] to understand which command is used for which purpose. Updating U-Boot is also described in the U-Boot documentation. HTH, Anatolij [1] http://www.denx.de/wiki/view/DULG/UBoot _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot