[U-Boot-Users] Re: [PATCH] 8xx: fix initialation bug/race condition between u-boot & linux

Tom Rini trini at kernel.crashing.org
Tue Jun 17 20:54:01 CEST 2003

On Tue, Jun 17, 2003 at 03:43:34PM +0300, Pantelis Antoniou wrote:

>  The u-boot loader upon finishing the decompression of the
> kernel image it just jumps into the kernel without
> resetting the CP. The kernel however resets the CP only when
> configured to apply a u-patch. The UART in the CP is
> still active however, and the descriptors in dpram
> end up overlapping.

I believe that the assumption here, which other firmwares follow, is
that this would be taken care of already.  Dan, do you recall making any
assumptions about this either way?

>  This is only a bandaid however, because under network load
> at the time of booting, i.e. broadcast packets or rebooting after
> a crash and another end sending non TCP packets, we still crash.
>  The proper way to address the problem is for the loader
> to stop any DMA capable peripherals before executing
> the kernel.

Does doing this fix, fix all of your problems?

Tom Rini

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