Hi all,
I'm trying to figure out how to boot my Linux kernel and fs image from two files stored on a jffs2 parition. I'm using uClinux and have been just booting a combined kernel+romfs image stored directly in flash. I need to split the kernel and rootfs apart (in this product, the kernel almost never changes but the apps do, it saves 1.5M of download via expensive GPRS).
I was successful getting the combined version to boot after placing it as a file into the jffs2 partition via 'fsload 0x01c00000 uImage.bin.gz.uboot' followed by a 'bootm 0x01c00000'. I tried simply splitting it and using mkimage -T ramdisk on it and loading it like the kernel followed by a 'bootm 0x01c00000 0x01900000', but that failed hard.
I noticed that when the bootm processes the ramdisk, it shows "Loading Ramdisk to 01dd8000, end 01f3140c ... OK" no matter what '-a' I pass to mkimage. I was trying to get it to just load it exactly after the kernel as the uClinux expects it right after .bss (CONFIG_MTD_UCLINUX_EBSS), but since that didn't work, I also tried rebuilding my kernel with telling uClinux exactly that address.
It's obvious to me that all the parts here exist, but I'm encountering too many options/questions to happen on the right path. I'm probably looking at this from the wrong angle. How do I do this?
Thanks, - Steve