From owner-svn-src-head@FreeBSD.ORG Wed Oct 14 02:49:42 2009 Return-Path: Delivered-To: svn-src-head@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 101681065676; Wed, 14 Oct 2009 02:49:42 +0000 (UTC) (envelope-from imp@bsdimp.com) Received: from harmony.bsdimp.com (bsdimp.com [199.45.160.85]) by mx1.freebsd.org (Postfix) with ESMTP id C2E6A8FC14; Wed, 14 Oct 2009 02:49:41 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by harmony.bsdimp.com (8.14.3/8.14.1) with ESMTP id n9E069sE014592; Tue, 13 Oct 2009 18:06:09 -0600 (MDT) (envelope-from imp@bsdimp.com) Date: Tue, 13 Oct 2009 18:06:20 -0600 (MDT) Message-Id: <20091013.180620.-1542634329.imp@bsdimp.com> To: xcllnt@mac.com From: "M. Warner Losh" In-Reply-To: <2E290D8D-BAF0-4E4E-A352-B00FAFD9DF83@mac.com> References: <20091013.113213.1449397633.imp@bsdimp.com> <2E290D8D-BAF0-4E4E-A352-B00FAFD9DF83@mac.com> X-Mailer: Mew version 5.2 on Emacs 21.3 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r197969 - head/sys/conf X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 14 Oct 2009 02:49:42 -0000 In message: <2E290D8D-BAF0-4E4E-A352-B00FAFD9DF83@mac.com> Marcel Moolenaar writes: : : On Oct 13, 2009, at 10:32 AM, M. Warner Losh wrote: : > : > Why? They should be scanned for on any system with a real isa : > bus... : > : : > : Other than i386, those are? : > : > So other than i386 and amd64, what systems use the isa device? : : I interpret the lack of answer as: none. : : isa(4) is usable on various architectures where the southbridge : contains a LPC or similar. The MPC8555 CDS, for example, has a : VIA southbridge that we need to talk to in order to get to the : ATPIC for dealing with the nested interrupt. isa(4) is the device : for this, but isaorm is causing kernel panics simply because : the memory between 0xC0000 and 0x100000 is not reserved for ISA : option ROMs. Likewise for Itanium, sparc64, etc... Does this mean that the memory cycles on the I/O bus isn't supported for these architectures? Or that it is and we just don't implement it in the platform specific interfaces for it? The memory space is reserved for any system that has a ISA bus, but it might not be at physical address 0xc0000, etc. : In short: scanning for option ROMs is not possible in all cases : where ISA compatibility is provided. Why is that? The platform specific code needs to implement the necessary hooks to support this. Warner