ppc platform for AMCC-440EPx - ELDK to the rescue
jwboyer at linux.vnet.ibm.com
Thu Mar 27 12:08:57 EST 2008
On Wed, 26 Mar 2008 09:08:03 -0400
Steve Heflin <sheflin at newagemicro.com> wrote:
> FINALLY the
> early debugging console output worked, which doesn't work at all
> using the powerpc platform (and yes, I had the correct port address
It should work. It did when the board support was first brought in to
arch/powerpc. If it doesn't now, I consider that a regression that needs
fixing, at least for Sequoia itself.
> Looking back at the powerpc platform, I don't see how to disable the
> Host Bridge initialization without disabling the entire PCI
> bus. This board does have 2 devices hooked on the PCI bus, just no
> need for a Host Bridge.
As Scott said, how would you talk to any PCI device without the host
bridge being configured and enabled?
> Also, I fail to see what the DTS virtualization layer of the hardware
> buys us. When debugging, it's so much harder to use than the ppc
> platform's straight forward and standard methodologies. I can't
There are tradeoffs, yes.
> understand to goal to eliminate the ppc platform, especially given
> the fact that DENX's ELDK is still using it with Linux 220.127.116.11 !!
The ELDK uses both arch/ppc and arch/powerpc. I consider them quite
reasonable people, and foresee them eventually switching to
arch/powerpc over time. In fact, their efforts are a large part of the
continued progress of 4xx on arch/powerpc.
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