Re: OMAP35xx Boot failure

[Felipe Balbi <me@felipebalbi.com>]

Hi,

first of all, please read http://elinux.org/Netiquette

On Fri, Apr 09, 2010 at 08:33:20AM -0700, Jerry Johns wrote:
> Hello all,     I've got a custom OMAP3503 board with 256Mbytes of
> LPDDR memory (single die, x32-bit) that i've got working with x-loader
> and u- boot. However, when i load the Linux kernel (2.6.32 git), it
> randomly produces the following errors: 
> 
> 1) Hangs midway through the "Uncompressing Linux ...." stage, and
> this is arbitrary and random on different attempts  2) If it ever does
> go through, it sometimes displays "invalid compressed format (err =
> 2)" or "crc error", "incomplete literal tree" and says "System
> halted"  3) If i disable caching in the kernel (in
> arch/arm/boot/compressed.S, line 233 "bl cache_on"), it at least
> completes the Uncompressing stage fine and proceeds to print ".......
> done, booting the kernel.", at which point it does not boot (most
> likely since i disabled the caching)  4) If i reset the board (not
> power-cycle) after the board hang above, and do a crc32 check on the
> kernel image in DDR memory (this is  possible since DDR2 memory
> contents do not get changed after a soft- reset), it matches the CRC32
> that i have calculated manually on the  kernel image. This shows that
> the main kernel image (from which it is uncompressed) is still
> intact. 

could it be memory timings ??

One thing you might wanna do is enable CONFIG_DEBUG_LL and
CONFIG_EARLY_PRINTK and append "debug earlyprintk" to your CMDLINE this
might give your more information about the problem.

-- 
balbi
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