[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] [PATCH] 64 bit I/O support v7
From: |
Edgar E. Iglesias |
Subject: |
Re: [Qemu-devel] [PATCH] 64 bit I/O support v7 |
Date: |
Tue, 5 May 2009 08:05:09 +0200 |
User-agent: |
Mutt/1.5.16 (2007-06-09) |
On Tue, May 05, 2009 at 02:59:28AM +0100, Jamie Lokier wrote:
> Blue Swirl wrote:
> > - Small writes cause a read-modify-write cycle, but I think that may
> > happen with real devices too. Another solution is to write zero in
> > other byte lanes without reading.
>
> On PCI and I think most buses, there are separate byte-enable pins for
> writing each byte lane and the hardware can decide to ignore the
> unenabled bytes or not.
>From my experience it is not uncommon for peripheral busses to
don't have the byte strobes. In fact, most (if not all) of the
embedded ones I've worked with are purely 32bit.
Cheers
- Re: [Qemu-devel] [PATCH] 64 bit I/O support v7, (continued)
- Re: [Qemu-devel] [PATCH] 64 bit I/O support v7, Robert Reif, 2009/05/01
- Re: [Qemu-devel] [PATCH] 64 bit I/O support v7, Paul Brook, 2009/05/01
- Re: [Qemu-devel] [PATCH] 64 bit I/O support v7, Robert Reif, 2009/05/01
- Re: [Qemu-devel] [PATCH] 64 bit I/O support v7, Paul Brook, 2009/05/01
- Re: [Qemu-devel] [PATCH] 64 bit I/O support v7, Blue Swirl, 2009/05/02
- Re: [Qemu-devel] [PATCH] 64 bit I/O support v7, Paul Brook, 2009/05/02
- Re: [Qemu-devel] [PATCH] 64 bit I/O support v7, Jamie Lokier, 2009/05/04
- Re: [Qemu-devel] [PATCH] 64 bit I/O support v7,
Edgar E. Iglesias <=
Re: [Qemu-devel] [PATCH] 64 bit I/O support v7, Robert Reif, 2009/05/01