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Date: Wed, 14 Mar 2007 17:08:36 -0700
From: Andrew Sharp <andy.sharp@onstor.com>
To: "Brian Stark" <brian.stark@onstor.com>
Subject: Re: memory map madness
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On Wed, 14 Mar 2007 16:38:42 -0700 "Brian Stark"
<brian.stark@onstor.com> wrote:

> Andy,

> I see your confusion about how there appears to be a physical address
> conflict between the Marvell and local memory.  Keep in mind that
> after all of the address translation and remapping stages inside the
> PMC, it's possible that different peripherals, such as SysAD and
> local memory, actually show the same physical address.  Since these
> peripherals are isolated from each other, this is ok.  Plus, we don't

What peripherals are you referring to?

> actually use the virtual regions at 20000000 and 30000000 as noted
> above.

Arr?  The RM9K CPU can't deal with two different things having the same
physical address.  The kernel can't do anything with that.  If you're
saying it's OK because we don't actually have any local memory above
512MB right now (physical 0 to (2000.0000 - 1), and therefore not at
4000.0000, and 4000.0000 is only ever used by the FC as marvell
memory....OK.  Of courses, I didn't hear you say that, I'm just
extrapolating.


> Brian
> 
> 
> > -----Original Message-----
> > From: Andy Sharp 
> > Sent: Wednesday, March 14, 2007 1:18 PM
> > To: Brian Stark
> > Subject: memory map madness
> > 
> > Hi Brian,
> > 
> > I'm apparently having trouble reading the memory map pdf's.
> > 
> > Bobcat\ Memory\ Map\ 3.pdf lists two different things at phys
> > 0x4000.000: 256MB of local memory, and 256MB of Marvell memory.
> > 
> > 
> > Bobcat\ Memory\ Map.pdf lists the marvell memory as starting 
> > at 0x5000.0000
> > 
> > What's the real and true story of the memory map?
> > 
> > Cheers,
> > 
> > a
> > 
