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Re: [Redboot] SDRAM size and ixp425
On Thu, 2005-03-03 at 18:37 +0800, David Lu wrote:
> 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.
Which document are you looking at? My copy of the IXP425 T-Spec shows
the above list as the only valid options. The SDRAM_CONFIG field of the
memory controller config register is only 3 bits and values 6 and 7 are
reserved.
--Mark
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