Re: [coreboot] Trace MMIO Read/Write

[Myles Watson]

> -----Original Message-----
> From: Joseph Smith [mailto:[e-mail]]
> Sent: Wednesday, March 04, 2009 9:14 PM
> To: Myles Watson
> Cc: coreboot
> Subject: RE: [coreboot] Trace MMIO Read/Write
>
> On Wed, 4 Mar 2009 20:44:38 -0700, "Myles Watson" 
> wrote:
> > > -----Original Message-----
> > > From: coreboot-bounces+mylesgw=[e-mail] [mailto:coreboot-
> > > bounces+mylesgw=[e-mail]] On Behalf Of Joseph Smith
> > > Sent: Wednesday, March 04, 2009 6:13 PM
> > > To: Patrick Georgi; coreboot
> > > Subject: Re: [coreboot] Trace MMIO Read/Write
> > >
> > > On Wed, 04 Mar 2009 17:48:55 -0500, Joseph Smith 
> > > wrote:
> > > > On Wed, 04 Mar 2009 17:37:50 -0500, Joseph Smith
>
> > > > wrote:
> > > > > On Wed, 04 Mar 2009 23:27:07 +0100, Patrick Georgi
> > > > >
> > > > > wrote:
> > > > > > Am 04.03.2009 23:23, schrieb Joseph Smith:
> > > > > > > Hello,
> > > > > > > Is there anyway to trace (capture) reads and writes to a mmio
>
> space
> > > in
> > > > > > > Linux? A utility program maybe?
> > > > > > >
> > > > > > I think that's what the renouveau project does, so they should have
> >
> > a
> > > > > > tool for that.
> > > > > > It should work by mapping the mmio area away, then catching all
> > > >
> > > > accesses
> > > > > > before passing them trough.
> > > > >
> > > > > Thanks Patrick, I will check it out. Does it catch reads as well as
> > > > > writes?
> > > >
> > > > Ahhh, thanks again Patrick!
> > > >
> > > > http://nouveau.freedesktop.org/wiki/MmioTrace
> > >
> > > hmmm :-(
> > > I need to do this on a older kernel 2.6.10 and mmiotrace does not
> >
> > support
> > > older kernels....
> > >
> > > Any other suggestions?
> >
> > Does it run in a simulator or an emulator?  SimNow or Qemu could log
>
> them
> > for you.
>
> Can they simulate a Intel onboard graphics adapter?

Probably not easily.  Is the driver not open-source?  I'm wondering why you
couldn't recompile it for the newer kernel if you really want to use
MmioTrace.

Thanks,
Myles