Gumstix u-boot 1.2
I took the plunge and, at the risk of bricking my Verdex, updated u-boot. I can only begin to describe the improvements! The process was not nearly as perilous as I anticipated (though I did hold my breath when I rebooted the first time). Noteworthy improvements are the ability to load the kernel directly into the U-Boot environment, and the inclusion of ymodem file transfers over the serial line. The former reduces my boot time to a breathtaking 23 seconds, while the latter reduces rootfs flash time via serial connection by more than half!
The process was simple enough: after running a make in the buildroot, you are given three files: rootfs_arm_nofpu.jffs2, u-boot.bin, and uImage. These are your root filesystem, u-boot image, and kernel image, respectively.
The first step in the process of the u-boot upgrade is to replace the u-boot image. I used Hyper Terminal to do the transfer using the Kermit protocol:
Then I sent the root filesystem image to the device using the ymodem protocol:
Finally, I installed the kernel image for U-Boot to use. This means that rather than mounting the jffs2 root filesystem then initializing the kernel, U-Boot can start the kernel directly:
Please note: these are the steps that worked for me; in all circumstances you should follow the latest instructions listed on The Gumstix Support Wiki.
Hope this helps,
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