[U-Boot-Users] Using DDR1 in AMCC 460EX custom design

[Felix Radensky <felix@embedded-sol.com>]

Hi, Stefan

Thanks a lot for a very useful info. I'll ask hardware designers to be 
in contact
with AMCC. Did you have a chance to test ECC enabled DDR2 on Canyonlands ?

Thanks.

Felix.

Stefan Roese wrote:
> Hi Felix,
>
> On Monday 30 June 2008, Felix Radensky wrote:
>   
>> I will soon have to port U-Boot to a custom board based on AMCC 460EX CPU.
>> This board should be very close to Canyonlands evaluation board, but board
>> designers decided to use DDR1 instead of DDR2 present on Canyonlands.
>>
>> Looking at U-Boot 1.3.3 code, I can see that DDR1 support for 460EX is
>> available
>> in cpu/ppc4xx/cp44x_spd_ddr2.c. My question is - was DDR1 support ever
>> tested
>> on 460EX.
>>     
>
> No, not from me while porting to Canyonlands. Could be that AMCC tested it on 
> their 460EX Maple reference design. Please contact AMCC on this.
>
> As you already noticed, cpu/ppc4xx/cp44x_spd_ddr2.c has some DDR1 support. But 
> I'm not sure if this will work "right out of the box". Could be that some 
> changes are needed.
>
>   
>> Another question is - are there DDR1 DIMMs that can be used on 
>> Canyonlands ?
>>     
>
> No. This is not possible.
>
> Best regards,
> Stefan
>
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