thorpej 76786b38b6 Mimmick the logic used by other drivers to determine if we should use
memory-mapped or i/o-mapped access to the device registers, and always
choose memory-mapped if it is enabled.  In particular, do _not_ explictly
disable the space we decide to not use, as this confuses some versions
of Alpha console software (which are arguably buggy because of this
problem).

Also, fix a logic error pointed out by Ross Harvey <ross@teraflop.com>
that would cause memory-mapped access to never be enabled.
1997-09-24 22:46:29 +00:00
..
1997-09-23 02:39:15 +00:00
1997-09-23 22:35:48 +00:00
1997-09-23 22:36:33 +00:00
1997-09-23 22:36:33 +00:00

$NetBSD: README,v 1.2 1994/10/27 04:21:29 cgd Exp $

This directory contains files which are used during PCI configuration
and PCI device drivers.  Eventually, most of the device drivers and
some of the configuration support should become machine-independent
and be moved to a more general location.

The configuration support was implemented according to the `PCI Local
Bus Specification, Production Version, Revision 2.0' dated April 30,
1993.  Section numbers referred to in the code may be specific to that
edition of the specification.

Some attempt has been made to insure that the code works on rogue
machines where the BIOS doesn't do its job, but in general I can't
guarantee that.

--
- Charles Hannum
  NetBSD group
  August 8, 1994