[haiku] Re: Why the MMU?
- From: Nicholas Blachford <nicholas@xxxxxxxxxxxxxx>
- To: haiku@xxxxxxxxxxxxx
- Date: Thu, 11 Dec 2008 22:23:11 +0000
From: "Ari Haviv" <arielbhaviv@xxxxxxxxx>
Subject: [haiku] Re: Why the MMU?
On Tue, Dec 9, 2008 at 11:51 AM, Zenja Solaja <solaja@xxxxxxxxx>
wrote:
Have they ever made a 32 bit CPU without an MMU in the last 30
years? Even
if such an exotic beast existed, would it be worthwile complicating
the
kernel to support such exotic hardware? I always thought that
Haiku's
primary target was desktop PC's with modern hardware, not exotic
embedded
devices.
Cheers.
well, there is the Natami project to build a new Amiga (http://www.natami.net/
)
They had quite a discussion on mmu (they don't like it):
http://www.natami.net/knowledge.php?b=4¬e=116&order=&x=0
Wow, Deja vu. I had a remarkably similar discussion with one of them,
I even remember offering up an idea around the problem but he was dead
set against the mere idea of any memory protection.
Some rather disturbingly odd ideas about how computers work in there.
Some funny ones as well though: Gunnar using DMA on Cell in an
argument against memory protection, evidently unaware DMA in Cell goes
through an MMU - all the SPEs have one.
To be fair though, if they do their own CPU adding an MMU will be a
big task so I understand the decision in that respect.
--
Nicholas Blachford
nicholas@xxxxxxxxxxxxxx
http://www.blachford.info
"Does it give loads of powaa for little wonga and overclock like a
mutha?" - dizietsma
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