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Re: [PATCH] add dispatch_i8259_irq() to i8259.c

To: Ralf Baechle <ralf@linux-mips.org>
Subject: Re: [PATCH] add dispatch_i8259_irq() to i8259.c
From: "Maciej W. Rozycki" <macro@ds2.pg.gda.pl>
Date: Tue, 17 Dec 2002 19:33:12 +0100 (MET)
Cc: Dominic Sweetman <dom@algor.co.uk>, Jun Sun <jsun@mvista.com>, linux-mips@linux-mips.org
In-reply-to: <20021217192344.A18364@linux-mips.org>
Organization: Technical University of Gdansk
Original-recipient: rfc822;linux-mips@linux-mips.org
Sender: linux-mips-bounce@linux-mips.org
On Tue, 17 Dec 2002, Ralf Baechle wrote:

> > Alternatively, many MIPS systems have a hardware feature which enables
> > them to generate imitation-x86 interrupt acknowledge cycles, so you
> > can keep the 8259s in complete ignorance that they're not being
> > controlled by an x86.  
> 
> Unless the hardware is an RM200 where under special circumstances the
> hardware acknowledge feature may result in loss of some or all i8259
> interrupts until full-reinitialization of the i8259 ...

 Can the hardware acknowledge be disabled?  If so, my proposed code should
work just fine.

-- 
+  Maciej W. Rozycki, Technical University of Gdansk, Poland   +
+--------------------------------------------------------------+
+        e-mail: macro@ds2.pg.gda.pl, PGP key available        +


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