From: Mark Salter <msalter@redhat.com>
To: cpereira@ics.uci.edu
Cc: ecos-discuss@sourceware.cygnus.com
Subject: Re: [ECOS] What's the definition of VROM memory region used for?
Date: Fri, 03 Aug 2001 08:14:00 -0000 [thread overview]
Message-ID: <200108031514.f73FErm00708@deneb.localdomain> (raw)
In-Reply-To: <Pine.SOL.4.20.0108030753070.22974-100000@washoe.ics.uci.edu>
>>>>> Cristiano Ligieri Pereira writes:
>> No. Its just with IQ80310. AFAIK, other ARM ports remap all of RAM to start
>> at address zero. Because of other constraints, we had to remap only the
>> first 4K of ram to address zero.
>>
>> --Mark
> Which constraints were that?
The hardware. In order to remap all of SDRAM to low memory, pretty much
every other piece of hw on the board would have to get remapped elsewhere.
There was a body of code already existing which relied on the physical
addresses. Not all of that software (very little actually) was in our
control and remapping all of SDRAM to low memory would have broken that
code. Because of scheduling issues outside of Red Hat, the current
approach was the one that won out.
--Mark
next prev parent reply other threads:[~2001-08-03 8:14 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-08-02 16:57 Cristiano Ligieri Pereira
2001-08-02 17:11 ` Mark Salter
2001-08-02 17:44 ` Cristiano Ligieri Pereira
2001-08-02 18:07 ` Mark Salter
2001-08-02 21:02 ` Cristiano Ligieri Pereira
2001-08-03 4:50 ` Mark Salter
2001-08-03 7:59 ` Cristiano Ligieri Pereira
2001-08-03 8:14 ` Mark Salter [this message]
2001-08-03 9:21 ` Cristiano Ligieri Pereira
2001-08-03 9:28 ` Mark Salter
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