From owner-freebsd-arm@FreeBSD.ORG Thu Jun 1 12:55:00 2006 Return-Path: X-Original-To: freebsd-arm@freebsd.org Delivered-To: freebsd-arm@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id CA37E16BA46 for ; Thu, 1 Jun 2006 12:55:00 +0000 (UTC) (envelope-from mlfbsd@dong.ci0.org) Received: from dong.ci0.org (cognet.ci0.org [80.65.224.102]) by mx1.FreeBSD.org (Postfix) with ESMTP id E0FE743D45 for ; Thu, 1 Jun 2006 12:54:59 +0000 (GMT) (envelope-from mlfbsd@dong.ci0.org) Received: from dong.ci0.org (localhost.ci0.org [127.0.0.1]) by dong.ci0.org (8.13.6/8.13.4) with ESMTP id k51DSS8T005781; Thu, 1 Jun 2006 15:28:29 +0200 (CEST) (envelope-from mlfbsd@dong.ci0.org) Received: (from mlfbsd@localhost) by dong.ci0.org (8.13.6/8.13.4/Submit) id k51DSSj2005780; Thu, 1 Jun 2006 15:28:28 +0200 (CEST) (envelope-from mlfbsd) Date: Thu, 1 Jun 2006 15:28:28 +0200 From: Olivier Houchard To: "Max N. Boyarov" Message-ID: <20060601132828.GA5739@ci0.org> References: <7hodxe4132.fsf@bsd.by> <20060531170631.GA96970@ci0.org> <7hk6823yzj.fsf@bsd.by> <20060531175025.GA97299@ci0.org> <7hd5du3xdu.fsf@bsd.by> <20060531213752.GA98637@ci0.org> <7hwtc1vya5.fsf@bsd.by> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <7hwtc1vya5.fsf@bsd.by> User-Agent: Mutt/1.4.1i Cc: freebsd-arm@freebsd.org Subject: Re: i80321reg.h X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Porting FreeBSD to the StrongARM Processor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 01 Jun 2006 12:55:02 -0000 On Thu, Jun 01, 2006 at 03:46:42PM +0300, Max N. Boyarov wrote: > > >>>>> "OH" == Olivier Houchard writes: > > OH> On Wed, May 31, 2006 at 08:41:17PM +0300, Max N. Boyarov wrote: > >> > >> >>>>> "OH" == Olivier Houchard writes: > >> > >> OH> On Wed, May 31, 2006 at 08:06:40PM +0300, Max N. Boyarov wrote: > >> >> > >> >> >>>>> "OH" == Olivier Houchard writes: > >> >> > >> >> OH> On Wed, May 31, 2006 at 07:21:21PM +0300, Max N. Boyarov wrote: > >> >> >> > >> >> >> Hi! > >> >> >> > >> >> >> What document should I read in order to understand > >> >> >> how to calculate the defines that are used in i80321reg.h ? > >> >> >> > >> >> > >> >> OH> Hi Max, > >> >> Hi Olivier, > >> >> OH> I'm not sure I understand the question. However, those most of those values > >> >> OH> come from the Intel 80321 I/O Processor developer's manual, available here : > >> >> OH> http://www.intel.com/design/iio/manuals/273517.htm > >> >> > >> >> Sorry for my english :). I meant, I do not know how freebsd works with virtual > >> >> memory, i.e. what address range is used for user applications, where kernel resides. > >> >> What would you recommend to read about that? Just for education purposes :) My concern > >> >> is 80321 xcale port only (not generic). > >> >> > >> > >> OH> No worries, my english isn't better :) > >> OH> Unfortunately I'm not sure there's something explaining this beside the code > >> OH> itself, so I'm gonna try to answer. > >> OH> Most of this is the same for every arm port, including the 80321. > >> OH> The interesting #define are mostly in sys/arm/include/vmparam.h > >> OH> * The line between user space and kernel space > >> OH> * Mappings >= KERNEL_BASE are constant across all processes > >> OH> */ > >> OH> #define KERNBASE 0xc0000000 > >> > >> OH> So generally speaking, whatever is >= 0xc0000000 is kernelland, whatever is < > >> OH> is userland. > >> OH> In arm/xscale/iq31244_machdep.c (which should be usable for every i80321 > >> OH> port, and thus has an unaccurate name), we map 0xfe800000 (IQ80321_OBIO_BASE), > >> OH> physical == virtual, to be able to use the UART early, > >> OH> then we use the virtual address 0xfe400000 (IQ80321_IOW_VBASE) to map the ATU > >> OH> stuff and the CPU registers. > >> > >> OH> I'm still not sure I properly answer to your question:) Feel free to ask > >> OH> for more. > >> > >> Many thanks, I shall continue to experiments with i80219 :) > >> > > OH> I'm very interested in i80219 support but have no hardware, please make me > OH> know how it goes, I'd be more than happy to provide help. > > It's work :)))) > > http://ncd0.bsd.by/arm/freebsd-arm-ep80219.log > > Very nice work ! It seems you've been able to re-use a lot of the code from the 80321, which is good. Care to share the patches ? :-) Olivier