[ECOS] [Redboot] SDRAM size and ixp425

David Lu davidlu.david@gmail.com
Thu Mar 3 10:39:00 GMT 2005


Thank your for your reply.

But in the ixdp425.h Line 80: #define IXP425_SDRAM_CONFIG_INIT 
(SDRAM_CONFIG_CAS_3 | SDRAM_CONFIG_2x8Mx16)

in Hal_ixp425.h
// SDRAM_CONFIG bits
#define SDRAM_CONFIG_2x8Mx16       0
#define SDRAM_CONFIG_4x8Mx16       1
#define SDRAM_CONFIG_2x16Mx16      2
#define SDRAM_CONFIG_4x16Mx16      3
#define SDRAM_CONFIG_2x32Mx16      4
#define SDRAM_CONFIG_4x32Mx16      5

It seems that it does not support 1x4Mx32. But in the h/w design in the 
Intel's document, the 1x4Mx32 can be supported.

How can redboot support it?
----- Original Message ----- 
From: "Andrew Lunn" <andrew@lunn.ch>
To: "David Lu" <davidlu.david@gmail.com>
Cc: <ecos-discuss@sources.redhat.com>
Sent: Thursday, March 03, 2005 4:14 PM
Subject: Re: [ECOS] [Redboot] SDRAM size and ixp425


> On Thu, Mar 03, 2005 at 11:52:14AM +0800, David Lu wrote:
>> Hello everyone,
>>
>> I'm using the redboot as the bootloader for ixp425 and one-chip 
>> 16MB(4Mx32)
>> SDRAM on the board. But when I wanted to download the redboot to the 
>> board,
>> I found that it seemed the redboot may not support the SDRAM.
>>
>> Does anyone have the idea about this item? How to modify the source codes
>> to support this?
>
> You probably need to modify the MMU setup for your board and the
> linker scripts. Take a look at the _misc.c for your HAL and the
> mlt_*.{ldi|h} files.
>
>        Andrew 


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