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Re: What is the maximum physical RAM for a 32bit MIPS core?

To: "Steven J. Hill" <sjhill@cotw.com>
Subject: Re: What is the maximum physical RAM for a 32bit MIPS core?
From: Ralf Baechle <ralf@oss.sgi.com>
Date: Wed, 6 Feb 2002 06:29:45 +0100
Cc: Hartvig Ekner <hartvige@mips.com>, linux-mips@oss.sgi.com
In-reply-to: <3C6044A7.13FEB2E2@cotw.com>; from sjhill@cotw.com on Tue, Feb 05, 2002 at 02:46:31PM -0600
References: <200202051747.SAA21696@copsun18.mips.com> <3C6044A7.13FEB2E2@cotw.com>
Sender: owner-linux-mips@oss.sgi.com
User-agent: Mutt/1.2.5i
On Tue, Feb 05, 2002 at 02:46:31PM -0600, Steven J. Hill wrote:

> > One note: Many MIPS32 implementations choose not to implement all 36 PA
> > bits, but limit themselves to 32 bits. This saves a few bits in the TLB
> > and a few address lines.
> > 
> So, if someone did want 36 PA bits on Linux, the TLB exception handlers
> and a little of the page table construction/management code would have to
> change. The userspace contraints and such would still remain. Cool.

Basically the whole code is already in place except a few bugs fixes that
still need to go in.

  Ralf

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