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RE: Can not get redboot to load / run linux binariesonIXP420
- From: Mark Salter <msalter at redhat dot com>
- To: don dot osburn at iscointl dot com
- Cc: "'Gary Thomas'" <gary at mlbassoc dot com>, "'eCos Discussion'" <ecos-discuss at ecos dot sourceware dot org>, "'Frank Mancuso (E-mail)'" <frank dot mancuso at iscointl dot com>
- Date: Fri, 29 Jul 2005 10:03:26 -0400
- Subject: RE: [ECOS] Can not get redboot to load / run linux binariesonIXP420
- References: <000501c59444$2af1bde0$9c8534cc@iscointl.com>
On Fri, 2005-07-29 at 08:48 -0500, Don Osburn wrote:
> Got it, and thanks to everyone for the help.
>
> The problem turned out to be initializing the SDRAM we are using in our
> configuration. Turns out we had to set bit 5 for our SDRAM. As in;
>
> #define IXP425_SDRAM_CONFIG_INIT ( 0x30 | SDRAM_CONFIG_CAS_3 |
> SDRAM_CONFIG_4x16Mx16 )
>
> We now have the OS loading / booting.
>
Interesting. You're setting both bit 4 and bit 5. In my manual, bit
4 is set for 3 cycle RAS latency and bit 5 is marked as reserved...
--Mark
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