On Tue, Apr 22, 2008 at 09:12:11PM -0700, gforgcc wrote:
i am trying to bring up the latest kernel on EP8248 target, i am using U-boot-1.3.2 and linux-2.6.25-rc8, i started debugging using BDI2000 which helped me to know atleast what is going wrong, i have added some printk's in the kernel source but still i am not able to find where and what exactly is going wrong, The first statement it is printing in the log buffer is ""Using Embedded Planet EP8248E machine description"" and thats it the next message is Unable to handle kernel paging request for data at address 0xbfff0000 Faulting instruction address:0xc0012070 (This nearest address to this address in System.map file is cacheable_memzero) and tracing like this i came to know that in the file arch/powerpc/mm/ppc_mmu_32.c , here in the function __init MMU_init_hw() and in the line n_hpteg = total_memory / (PAGE_SIZE * 8); probably it is getting problem because when i tried to print the variable total_memory it is printing zero !!! :( :( so probably i am thinking it is not able to find some memory for Hash table :(
Are you using a device-tree-aware u-boot with uImage, or are you using cuImage.pq2? Do not use dtbImage.ep8248e; that's for PlanetCore.
ep8248e in mainline u-boot doesn't appear to be device-tree aware.
If you're using cuImage.pq2, do you get any output from the bootwrapper? Make sure you add /chosen/linux,stdout-path. There may be other device tree changes you need to make it work with u-boot as well.
-Scott