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Re: [PATCH] Synthesize TLB refill handler at runtime

To: Ralf Baechle <ralf@linux-mips.org>
Subject: Re: [PATCH] Synthesize TLB refill handler at runtime
From: "Maciej W. Rozycki" <macro@linux-mips.org>
Date: Wed, 24 Nov 2004 23:13:22 +0000 (GMT)
Cc: Thiemo Seufer <ica2_ts@csv.ica.uni-stuttgart.de>, Manish Lachwani <mlachwani@mvista.com>, Geert Uytterhoeven <geert@linux-m68k.org>, Linux/MIPS Development <linux-mips@linux-mips.org>
In-reply-to: <20041124224555.GD22439@linux-mips.org>
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <41A283BD.3080300@mvista.com> <Pine.LNX.4.58L.0411230036310.31113@blysk.ds.pg.gda.pl> <41A29DCF.8030308@mvista.com> <Pine.LNX.4.58L.0411232018390.19941@blysk.ds.pg.gda.pl> <20041124014057.GE902@rembrandt.csv.ica.uni-stuttgart.de> <20041124094423.GB21039@linux-mips.org> <Pine.LNX.4.58L.0411241451290.843@blysk.ds.pg.gda.pl> <Pine.LNX.4.58L.0411242138560.843@blysk.ds.pg.gda.pl> <20041124221240.GA24500@linux-mips.org> <Pine.LNX.4.58L.0411242237540.843@blysk.ds.pg.gda.pl> <20041124224555.GD22439@linux-mips.org>
Sender: linux-mips-bounce@linux-mips.org
On Wed, 24 Nov 2004, Ralf Baechle wrote:

> Which unfortunately is becoming unusable fairly soon on many systems.
> IP27: ARC is dead after the first TLB flush.  IP22: dead after the
> external L2 controller was enabled etc.  On average I'm less than
> pleased with firmware usability even for simple stuff such as printing ...

 Broken firmware...  For DECstations it works until we wipe out RAM
reserved by the firmware, right before running `init'.  Which is not
firmware's fault, of course, and which I plan to get fixed eventually to
be able to access and set firmware environment variables from the
userland, to do a proper halt and reboot (with a command), etc.  I've not
decided whether to rip it away completely or to leave it as a
configuration option for these memory starved.  You can have 4MB of RAM on
some DECstations, you know.

  Maciej

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