From owner-freebsd-smp  Thu Feb 25 10:37:39 1999
Delivered-To: freebsd-smp@freebsd.org
Received: from fleming.cs.strath.ac.uk (fleming.cs.strath.ac.uk [130.159.196.126])
	by hub.freebsd.org (Postfix) with ESMTP id 5DCCF14E0A
	for <smp@freebsd.org>; Thu, 25 Feb 1999 10:34:57 -0800 (PST)
	(envelope-from roger@cs.strath.ac.uk)
Received: from muir-10 (roger@muir-10.cs.strath.ac.uk [130.159.148.10])
	by fleming.cs.strath.ac.uk (8.8.8/8.8.8) with SMTP id SAA01923
	Thu, 25 Feb 1999 18:34:40 GMT
Message-ID: <36D597C2.446B@cs.strath.ac.uk>
Date: Thu, 25 Feb 1999 18:34:42 +0000
From: Roger Hardiman <roger@cs.strath.ac.uk>
Organization: University of Strathclyde
X-Mailer: Mozilla 3.04Gold (X11; I; OSF1 V4.0 alpha)
MIME-Version: 1.0
To: smp@freebsd.org
Subject: Run time detection of APIC
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Sender: owner-freebsd-smp@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.org

Hi,
I'm reworking the pccard / pcmcia adapter code to work with
SMP kernels. It currently causes a Panic.

The fix is simple, the current code tries to allocate IRQs but
does not know about APIC.

I can change the driver to be of the form
#ifdef APIC_IO
  .. do apic specific stuff
#else
  .. do original code
#endif


But if you make a KLD module on a uni-processor kernel and then
make a MSP kernel but load the uni-processor PCCARD module, the
module will cause a panic as it does not contain the APIC specific code.

Can the module detect if we are in APIC mode at run time. I want
something like
#ifdef APIC_IO
  .. do apic code
#else
  .. if runtime says we are in APIC mode, panic this code has been
compiled for
  .. a uni-processor kernel.
  .. else do original code
#endif

Thanks

Roger Hardiman
roger@cs.strath.ac.uk


To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-smp" in the body of the message