Re: PAE and i386 kernel

[christos%astron.com@localhost (Christos Zoulas)]

In article <20091006201027.GA17163%britannica.bec.de@localhost>,
Joerg Sonnenberger  <joerg%britannica.bec.de@localhost> wrote:
>On Tue, Oct 06, 2009 at 08:08:29PM +0000, Christos Zoulas wrote:
>> In article <20091006140232.GA25008%colwyn.zhadum.org.uk@localhost>,
>> Matthias Scheler  <tron%zhadum.org.uk@localhost> wrote:
>> >On Tue, Oct 06, 2009 at 03:40:21PM +0200, Christoph Egger wrote:
>> >> > Thanks for the answer.  Is there any idea what would be required
>> >> > to support it for i386 kernels?
>> >> 
>> >> AFAIK the bootstrapping code.
>> >
>> >What about bus_dma() support? Can NetBSD/i386 already handle
>> >DMA to 64-bit addresses?
>> 
>> It would need to limit dma buffers to below 4GB. This needs to be fixed
>> anyway (read the comment in the DRM code).
>
>There are 64bit aware devices.

Yes, and we need to change bus_size_t to accommodate them. This is too
much work for little benefit.

christos