[U-Boot] help

[Naveen Kumar GADDIPATI]

Hi dinny,

At the uboot level,we will confgiure only one core to boot up the image but we use two cores.For this usecase, could we use the single cortex-A8 uboot source code?

Regards,
Naveen
-----Original Message-----
From: dinny [mailto:dinny.wu at gmail.com] 
Sent: Wednesday, January 07, 2009 2:41 PM
To: Naveen Kumar GADDIPATI
Cc: u-boot at lists.denx.de
Subject: Re: [U-Boot] help

For SoCs, it depends on how the system design intends to make use of the two processors.

If the design intends to use them as AMP, you should run u-boot for each processor in sequence to init their peripherals. In this case, you can adapt u-boot deriving from the openzoom source. If as SMP, you can run u-boot on one core and make the other core regardless for U-Boot, and make the other working when linux boots.

Anyway, you have to read through the chapters of the SoC spec on how the two processors are intended to co-work to make this more clear. I can't get the SPECs, and I cannot give you more information. Denk could give more details, for MPC85xx multi processor implementation:-)

Best Regards
Dinny

On Wed, Jan 7, 2009 at 1:27 PM, Naveen Kumar GADDIPATI <naveen.gaddipati at stnwireless.com> wrote:
>
> Hi dinny,
>
> Thanks for your reply.
> We are working on arm-cortex A9(single core).The product has two such single cores.
> Could we start using this coretex A8 uboot source code?
>
> Regards,
> Naveen
> -----Original Message-----
> From: dinny [mailto:dinny.wu at gmail.com]
> Sent: Wednesday, January 07, 2009 7:20 AM
> To: Naveen Kumar GADDIPATI
> Cc: u-boot at lists.denx.de
> Subject: Re: [U-Boot] help
>
> Hi Naveen,
>
> Do you use a cortex A9 single core or multicore product? If you are 
> using a cortex A9 single core, you can have a look at omap zoom u-boot 
> implementation as a reference. It's based on TI's omap3430, a Cortex
> A8 core. Although there should be some difference on the internal architecture design, I don't think it makes much difference for software implementation.
>
> Best Regards
> Dinny
>
> On Tue, Jan 6, 2009 at 4:28 PM, Naveen Kumar GADDIPATI <naveen.gaddipati at stnwireless.com> wrote:
>> Hi,
>>
>> I'm working for arm cortex A9 processor.Do we have any uboot source 
>> code support for cortex A9 processor?
>>
>> eMMC
>> Do we have any patch or source code for eMMC in uboot?
>>
>> Thanks and Regards,
>> Naveen
>>
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>> U-Boot at lists.denx.de
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>>
>
>
>
> --
> what we need is passion, chance, and companions.
>
>



--
what we need is passion, chance, and companions.