From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gate.crashing.org (gate.crashing.org [63.228.1.57]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTP id 051B7DDE0D for ; Thu, 28 Jun 2007 08:53:06 +1000 (EST) In-Reply-To: <17094a76430d6dd0df7aa07560b4e204@kernel.crashing.org> References: <11829070051484-git-send-email-galak@kernel.crashing.org> <11829070063989-git-send-email-galak@kernel.crashing.org> <11829070073637-git-send-email-galak@kernel.crashing.org> <11829070091056-git-send-email-galak@kernel.crashing.org> <11829070102887-git-send-email-galak@kernel.crashing.org> <11829070111239-git-send-email-galak@kernel.crashing.org> <1182907013252-git-send-email-galak@kernel.crashing.org> <1182907014549-git-send-email-galak@kernel.crashing.org> <1182907015126-git-send-email-galak@kernel.crashing.org> <11829070192461-git-send-email-galak@kernel.crashing.org> <8fa84ed4810eb9aca18739bf709e71d9@kernel.crashing.org> <41E15EC0-D16E-4A9F-BCA8-1E126F6D95A7@kernel.crashing.org> <0639caa4f420578b671c9e2f9713ba39@kernel.crashing.org> <17094a76430d6dd0df7aa07560b4e204@kernel.crashing.org> Mime-Version: 1.0 (Apple Message framework v752.2) Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Message-Id: <66B07304-BE33-4A9E-8C9C-BEC0BCEC79F8@kernel.crashing.org> From: Kumar Gala Subject: Re: [PATCH 09/15] [POWERPC] 86xx: Add uli1575 pci-bridge sector to MPC8641HPCN dts file. Date: Wed, 27 Jun 2007 17:51:58 -0500 To: Segher Boessenkool Cc: linuxppc-dev list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Jun 27, 2007, at 4:21 PM, Segher Boessenkool wrote: >>>>>>> - ranges = <0 f8000000 00100000>; >>>>>>> - reg = ; // CCSRBAR 1M >>>>>>> + ranges = <00001000 f8001000 000ff000 >>>>>>> + reg = ; // CCSRBAR > >>> There is "BAR" in the name, so it is a movable range? Where >>> is the base address set? >> >> in a MMIO register in the space itself. > > Oh, *great* design. its not that bad ;) >>> What is the relationship between (in the example) the address >>> ranges x'f800_0000+1000 and x'f800_1000+ff000? >> >> uugh, not sure what that's all about. > > Reading back I see that the CCSR region is 1MB, and only the > first 4kB are for this PHB. What is the rest of this range > used for -- devices on this PCI bus, other SoC devices, ...? No, the first 4kB are SOC/platform level config registers (high level window setup, CCSR location, etc). The PHB registers are somewhere in the middle (0x8000, I think). All the children devices (enet, PHBs, etc) live in the 1M block. I think my original idea was the reg property on the SOC node was for the first 4k block that held the SOC config registers. I think what Wade did is correct since the reg property on the SOC node isnt going to get translated through the ranges property and that they should be mutually exclusive. - k