Subject: Re: trying to boot on ADI coyote
To: Franck Baudin <email@example.com>
From: Steve Woodford <firstname.lastname@example.org>
Date: 12/05/2003 08:44:08
On Friday 05 December 2003 7:45 am, Franck Baudin wrote:
> Thanks for your advice : I was not compiling in big endian. But the
> problem still remains : I suppose that my coyote or my redboot
> (preinstalled redboot 1.92) is different than yours.
Mine came with RedBoot 2.0. Which is odd, since the firmware date is
earlier than yours:
RedBoot(tm) bootstrap and debug environment [ROM]
Non-certified release, version 2.00 - built 16:08:18, Apr 1 2003
Platform: COYOTE (XScale)
> I have 64 MBytes of RAM on my coyote, mapped at 0x0, and you have
> 32MBytes of RAM mapped at 256MB (0x10000000) : we must have a
> different redboot (did you tweak your redboot ?), or a different
> board release (mine is "COYOTE 4"), or both ;-)
It would seem you have a later revision of board; the IDE interface is
supposedly not working on mine, though I've never tried to use it.
> From the ADI Hardware Manual :
> "The lowest 256 Mbyte of address space is configurable, based on the
> value of a configuration register
> located in the expansion-bus controller.
This is true. However, there is *always* an alias of SDRAM starting at
0x10000000 (the ixp425 can have a maximum of 256MB SDRAM). So I suggest
changing KERNEL_BASE_PHYS to 0x00200000.
The kernel is actually much happier running out of the SDRAM alias at
0x10000000. See the comment near the end of cpu_reboot() in