From owner-freebsd-current  Wed Dec 22  2:38:48 1999
Delivered-To: freebsd-current@freebsd.org
Received: from eclogite.eps.nagoya-u.ac.jp (eclogite.eps.nagoya-u.ac.jp [133.6.124.145])
	by hub.freebsd.org (Postfix) with ESMTP id 01C1314F45
	for <FreeBSD-current@FreeBSD.ORG>; Wed, 22 Dec 1999 02:38:41 -0800 (PST)
	(envelope-from kato@ganko.eps.nagoya-u.ac.jp)
Received: from localhost (gneiss.eps.nagoya-u.ac.jp [133.6.124.148])
	by eclogite.eps.nagoya-u.ac.jp (8.9.3/3.7W) with ESMTP id TAA56782;
	Wed, 22 Dec 1999 19:38:37 +0900 (JST)
To: FreeBSD-current@FreeBSD.ORG
Cc: FreeBSD98-hackers@jp.freebsd.org
Subject: indirection in bus space
From: KATO Takenori <kato@ganko.eps.nagoya-u.ac.jp>
X-Mailer: Mew version 1.93 on Emacs 19.34 / Mule 2.3 (SUETSUMUHANA)
X-PGP-Fingerprint: 03 72 85 36 62 46 23 03  52 B1 10 22 44 10 0D 9E
Mime-Version: 1.0
Content-Type: Text/Plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Message-Id: <19991222193807R.kato@gneiss.eps.nagoya-u.ac.jp>
Date: Wed, 22 Dec 1999 19:38:07 +0900
X-Dispatcher: imput version 980905(IM100)
Lines: 32
Sender: owner-freebsd-current@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.ORG

I'm planning to commit the bus space code(*) supporting indirection
into current for PC-98.  As far as I know, only PC-98 needs
indirection.  So, it will be enabled only when the `PC98' is defined
to avoid performance loss on IBM-PCs.

(*)The code is submitted by Takahashi-san <nyan@FreeBSD.ORG>.

My plan is as follows:
   1. copy sys/i386/include/bus.h to sys/i386/include/bus_at386.h
   2. put sys/i386/include/bus_pc98.h into the sys/i386/include
      directory.
   3. Make new sys/i386/include/bus.h file as:
	#ifdef PC98
	#include <machine/bus_pc98.h>
	#else
	#include <machine/bsu_at386.h>
	#endif
   4. Make new file bus_pio_ind.h.  This file only defines
      _I386_BUS_PIO_IND_H.

New functions isa_alloc_resourcev() and isa_load_resourcev are added
to support indirection in isa.c.  Also, nexus.c is modifed.  I'll fork 
these files int sys/pc98/pc98 and sys/pc98/i386.

Is there any comments?

-----------------------------------------------+--------------------------+
KATO Takenori <kato@ganko.eps.nagoya-u.ac.jp>  |        FreeBSD           |
Dept. Earth Planet. Sci, Nagoya Univ.          |    The power to serve!   |
Nagoya, 464-8602, Japan                        |  http://www.FreeBSD.org/ |
                                               |http://www.jp.FreeBSD.org/|
++++ FreeBSD(98) 3.3R-Rev. 01 available!       +==========================+


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