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From: Segher Boessenkool <segher@kernel.crashing.org>
Subject: Re: [PATCH] Remove powerpc specific parts of 3c509 driver
Date: Wed, 20 Sep 2006 03:41:02 +0200
To: linas@austin.ibm.com (Linas Vepstas)
Cc: akpm@osdl.org, Stephen Rothwell <sfr@canb.auug.org.au>,
	ppc-dev <linuxppc-dev@ozlabs.org>, netdev@vger.kernel.org,
	jgarzik@pobox.com
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> Well, I'm having trouble thinking of other busses that have as strong
> a sense of the "address-data" style I/O as PCI. Busses like scsi and
> ide are primarily "command-data" or "data-data" in style.  Only the
> address-data style busses need readl/writel-style routines.

SBUS, JBUS, VMEbus, NuBus, RapidIO, eBus, various SoC busses, to name
a few.  There are many, and most are big-endian.


Segher