Re: [RFC] PCI bridge driver rewrite

Adam Belay
2005-03-01T00:14:36Z

On Mon, 2005-02-28 at 15:38 -0800, Jesse Barnes wrote:
> On Monday, February 28, 2005 3:27 pm, Adam Belay wrote:
> > How can we specify which bus to target?
>
> Maybe we could have a list of legacy (ISA?) devices for drivers like vgacon to
> attach to? The bus info could be stuffed into the legacy device structure
> itself so that the platform code would know what to do.

Are these devices actually legacy, or PCI with compatibility interfaces?

I think a "struct isa_device" would be be useful. Would a pointer to
the "struct pci_bus" do the trick?

>
> > Also is the legacy IO space mapped to IO Memory on the other side of the
> > bridge?
>
> How do you mean? Legacy I/O port accesses just become strongly ordered memory
> transactions, afaik, and legacy memory accesses are dealt with the same way.
>
> Jesse

I was just wondering if we have to reserve a memory range for this?

Thanks,
Adam