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Re: [Redboot] SDRAM size and ixp425


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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