From owner-freebsd-hackers@FreeBSD.ORG  Thu May 11 09:45:03 2006
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
X-Original-To: freebsd-hackers@freebsd.org
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id BC61B16A410
	for <freebsd-hackers@freebsd.org>; Thu, 11 May 2006 09:45:03 +0000 (UTC)
	(envelope-from hongz@promisechina.com)
Received: from mxdxt7.hichina.com (mxdxt7.hichina.com [218.244.143.27])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 4E64C43D6E
	for <freebsd-hackers@freebsd.org>; Thu, 11 May 2006 09:44:59 +0000 (GMT)
	(envelope-from hongz@promisechina.com)
Received: from 222.128.58.137 (HELO hongzhao) (envelope-from
	hongz@promisechina.com)
	by mxdxt7.hichina.com (quarkmail-1.2.1) with ESMTP id S5174738AbWEKJou
	for freebsd-hackers@freebsd.org; Thu, 11 May 2006 17:44:50 +0800
From: <hongz@promisechina.com>
To: <freebsd-hackers@freebsd.org>
Date: Thu, 11 May 2006 17:45:00 +0800
MIME-Version: 1.0
X-Mailer: Microsoft Office Outlook, Build 11.0.5510
Thread-Index: AcZ035HVljCqpd8VQaWcxPYKaR/2rg==
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.3790.0
Message-ID: <1147340690$36076$55833599@hongz@promisechina.com>
X-Mailman-Approved-At: Thu, 11 May 2006 11:58:24 +0000
Content-Type: text/plain;
	charset="us-ascii"
Content-Transfer-Encoding: 7bit
X-Content-Filtered-By: Mailman/MimeDel 2.1.5
Subject: help:How to map a physical address into a kernel address?
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 11 May 2006 09:45:04 -0000

Hi guys:

 

To access sg_table in kernel address, I need to map the starting physical
address of a segment into a kernel address. As I know that, we can use
phystovirt()/bustovirt(), or kmap()/kmap_atomic() to map a bus/physical
address or a physical page into a kernel address in Linux, but I did not
find such a function in FreeBSD. Please help me on this, it is very urgent!

 

Thanks a lot!

 

Hong