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Date: Wed, 2 Nov 2011 11:30:55 -0700
From: Nishanth Aravamudan <nacc@us.ibm.com>
To: Ryan Wang <openspace.wang@gmail.com>
Subject: Re: What does rmo/tce stand for in powerpc?
Message-ID: <20111102183055.GK24610@us.ibm.com>
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On 02.11.2011 [19:17:20 +0800], Ryan Wang wrote:
> 2011/11/2 Nishanth Aravamudan <nacc@us.ibm.com>
> 
> > Hi Ryan,
> >
> > On 01.11.2011 [14:25:43 +0800], Ryan Wang wrote:
> > > Hi,
> > >
> > > In kernel source comments, I saw the words:
> > > ''
> > >
> > > alloc_top is set to the top of RMO, eventually shrink down if the
> > > <http://lxr.linux.no/linux+*/arch/powerpc/kernel/prom_init.c#L972>TCEs
> > > overlap
> > >
> > > ''
> > >
> > > I wonder what does RMO mean, and TCE?
> >
> > RMO = Real Mode Offset -- deprecated in terms of Real Mode Area in PAPR.
> >
> > TCE = Translation Control Entry
> >
> > You should be able to find descriptions of both in PAPR.
> >
> 
> Thanks Nish!
> 
> But I searched <Power.orgTM Standard for Embedded Power ArchitectureTM
> Platform Requirements> and failed to found the concept RMO or Real Mode
> Offset.
> 
> Will you please give me some hints to the docs??Thanks,

Section 14.1.1 Real Mode Accesses in PAPR 2.4

Thanks,
Nish

-- 
Nishanth Aravamudan <nacc@us.ibm.com>
IBM Linux Technology Center