On 2013-08-28, Chuck Wical chuck.wical@amanomcgann.com wrote:
I am trying to load rootfs.ext2.gz.uboot from usb using fatload but when it reaches a point in writing the file to memory a reset occurs of the CPU. If I load this file using tftp it works fine. Here are the commands I am using:
loadaddr=0x21000000
tftp $(loadaddr) rootfs.ext2.gz.uboot
usb start fatload usb 0 $(loadaddr) rootfs.ext2.gz.uboot
The version of U-Boot used is 2009.11.1 and upgrading at this point may be an issue. Before a bunch of questions are asked I inherited this project, it is mature and works, I have no documentation, and I am simply trying to copy a file from usb to memory. Nothing more, nothing fancy.
My searches on the web have not yielded any possible solutions or good explanations of the usb subsystem in U-Boot so I am hoping someone can provide some possible solutions or information I can read.
The FAT reading code in old versions of U-Boot is quite sensitive to external conditions. In my experience, changing the compiler for a source tree based on the 2007 U-Boot code from GCC 4.3.3 to GCC 4.7.3 produced the same issue as the one you described. Surprisingly, the issue only occurred for the rootfs, and not the kernel, which was a smaller file.
Unfortunately for you, our answer to this issue was the finalization of the porting of our platform to the U-Boot mainline, which does not has those problems.
Best regards,