[prev in list] [next in list] [prev in thread] [next in thread] 

List:       linux-kernel
Subject:    Re: [RFC] PCI bridge driver rewrite
From:       Adam Belay <abelay () novell ! com>
Date:       2005-03-01 0:13:17
Message-ID: 1109635997.28403.123.camel () localhost ! localdomain
[Download RAW message or body]

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


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/
[prev in list] [next in list] [prev in thread] [next in thread]