[U-Boot] Uboot and ARM SMP support

Peter Pearse
2009-06-25T15:55:30Z

Those interested in SMP booting on ARM may be interested in

http://www.linux-arm.org/LinuxBootLoader/SMPBoot

On ARM supplied development boards we rely on the pre-installed

ARM Boot Monitor to provide the necessary setup to allow U-Boot to run uni-core.

I am about to look at a patch for the ARM Fast Model A9 multicore

in order to boot it without an ARM Boot Monitor. I'll cc this list

once it is added to git://linux-arm.org/u-boot-armdev

Apologies for the disclaimer - our sys admins seemd to have decided to close my open-source account.......

Regards

Peter

> -----Original Message-----
> From: u-boot-bounces at lists.denx.de
> [mailto:u-boot-bounces at lists.denx.de] On Behalf Of Nishanth Menon
> Sent: 25 June 2009 10:48
> To: Sudeep K N
> Cc: u-boot at lists.denx.de; Pandita, Vikram; Tom
> Subject: Re: [U-Boot] Uboot and ARM SMP support
>
> Sudeep K N said the following on 06/25/2009 12:11 PM:
> > Sorry, may be I confused you.
> > I indent to use only one core for u-boot.
> > I wanted to ask whether we need to update the cache
> management to boot
> > for ARM Cortex A9 SMP if we take ARM Cortex A8 code as base.
> > I have tried and did not require any change on top of A8
> code to run
> > u-boot on A9 SMP.
> > Is that right approach?
> >
> >
> you may want to see [1] how this was done for OMAP4 (which
> has a SMP cortex A9)-> we can discuss how to setup cortex_a9
> in mainline u-boot.
>
> My thought would be: cpu/arm_cortexa9 - considering that a9
> cores could be from 1 to 4 or so if my memory serves right ->
> btw, I wonder how SMP handling is done in u-boot today..
>
> Regards,
> Nishanth Menon
> Ref:
> [1]
> http://git.omapzoom.org/?p=repo/u-boot.git;a=tree;h=refs/heads
> /omap4_dev;hb=refs/heads/omap4_dev
>
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