I am currently trying to boot an kernel with inital ramdisk using u-boot on an EP885C, but I am running into the following problem when I try to boot the kernel:
Linux version 2.4.22 (wdhaine@prod-pci) (gcc version 3.3.3) #1 Mon Jul 18 12:45:35 EDT 2005 On node 0 totalpages: 16384 zone(0): 16384 pages. zone(1): 0 pages. zone(2): 0 pages. Kernel command line: console=ttyS0,9600 console=ttyS0 root=/dev/ram0 init=/linuxrc rw
...
RAMDISK driver initialized: 16 RAM disks of 16384K size 1024 blocksize loop: loaded (max 8 devices)
...
RAMDISK: Compressed image found at block 0 Freeing initrd memory: 466k freed Kernel panic: VFS: Unable to mount root fs on 01:00
I would think that this is purely a kernel problem; however, it did not crop up until I started using u-boot. As shown above, I have ramdisk support built into the kernel, and I am passing it a root device in the kernel command line, so this doesn't seem to be an FAQ type of problem.
In order to get the kernel to run, I had to copy the ppcboot.h bd_t struct into my linux port and change the IMAP_ADDR to get the kernel to boot. I am thinking that somehow the bd_t struct changes could make the it impossible to use /dev/ram0 correctly. Other than that, I am stumped. Any help would be greatly apprectiated.
Will Haines