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Re: [Qemu-devel] [PATCH] 64 bit I/O support v7
From: |
Paul Brook |
Subject: |
Re: [Qemu-devel] [PATCH] 64 bit I/O support v7 |
Date: |
Sat, 2 May 2009 20:35:44 +0100 |
User-agent: |
KMail/1.9.9 |
On Saturday 02 May 2009, Blue Swirl wrote:
> On 5/2/09, Paul Brook <address@hidden> wrote:
> > > Should a new intermediate bus layer also do byte swapping?
> >
> > Yes, though a bus layer isn't actually a necessary prerequisite.
> >
> > As I mentioned in the recent "Smarter compilation for target devices"
> > thread[1], having individual devices do byteswapping is bogus. A while
> > ago I reworked the TLB handling, so there should now be spare bits that
> > can be used for things like byteswapping.
>
> This version does the byte swapping and width translation in exec.c.
> Sparc32 OpenBIOS/Linux does not use the wrong sized accesses, so that
> part may be untested.
This appears to be adding yet annother layer of indirection, which isn't
really what I had inmind.
Paul
- 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, Blue Swirl, 2009/05/01
- Re: [Qemu-devel] [PATCH] 64 bit I/O support v7, Edgar E. Iglesias, 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, 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 <=
- 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, 2009/05/05
Re: [Qemu-devel] [PATCH] 64 bit I/O support v7, Robert Reif, 2009/05/01