From: Chris Collins <xfire-9fans@xware.cx>
To: Fans of the OS Plan 9 from Bell Labs <9fans@cse.psu.edu>
Subject: Re: [9fans] forgot to mention ts7200 is working
Date: Sat, 30 Apr 2005 15:01:21 +1000 [thread overview]
Message-ID: <20050430050121.GA7051@xware.cx> (raw)
In-Reply-To: <Pine.LNX.4.58.0504291526000.23205@enigma.lanl.gov>
Ronald G. Minnich was once rumoured to have said:
> this is the ep93xx core.
>
> it all seems to be working with cache etc. Due to the fact that phsyical
> memory is 4 segemnts at present only 16 MB of 32MB is usable.
This is the same problem that my current sparc32 code is plauged with
-- each bank of physical ram on a SS10 appears on a 64MB boundary, so
if a bank has less than 64MBs of RAM...
> I also include a modified xalloc.c that lets you allocate "flavors" of
> memory, e.g. uncached and cached regions. This may be handy at some point,
> esp. when we get to 64-bit machines where at minimum you needed "low 4G"
> and "above4G" flavors of memory.
Actually, xalloc needs fixing to handle an arbitary number of physical
ranges (rather than just the 2 it currently supports). I've been
saying this on #plan9 for the past... umm... 3-4 weeks?
I'll take a look at your code, try to remember how exactly I intended
on patching xalloc before I forgot (I put it aside for one week too
many) and see if I can fix it so we can use all the ram in both the
SS10 and in the ts7200 as well...
C.
prev parent reply other threads:[~2005-04-30 5:01 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-29 21:28 Ronald G. Minnich
2005-04-30 5:01 ` Chris Collins [this message]
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