Subject: Re: how to detect at runtime which system you're running on...
To: Chris Gilbert <>
From: Matt Thomas <>
List: port-arm
Date: 06/17/2001 16:47:27
At 11:31 PM 6/17/2001 +0100, you wrote:
>With the move towards different arch dirs, it's been suggested that archs
>that can merge do, eg EBSA285 and CATS, A7000 and RISCPC.  However I'm
>currently unaware of an easy way to do runtime detection of arch.  If someone
>knows of one I'm just being ignorant of, please shout up :)
>To make the merge for some ports is easier as other information differs, eg
>iomd version/cpu id can be used.  However in the CATS and EBSA case the two
>machines are near identical, but not quite (eg footbridge/footbridge_pci.c
>has a #ifdef EBSA285 in it)

So?  that just #ifdef becomes an if.  footbridge_pci.c should just a global
that cats sets to true.

>To deal with this in a generic manner, I'd like to suggest we have an
>arm/arch_type.h header file, into which we have an enum of all the
>arch/platforms.  We then have a variable for checking what arch the kernel is
>on.  The variable being in arm/arm/cpufunc.c (or some other file decided on)

That seems overkill.  This variable is only needed on per-port basis.  It seems
to make sense to leave it that way.

Matt Thomas               Internet:
3am Software Foundry      WWW URL:
Cupertino, CA             Disclaimer: I avow all knowledge of this message