From mboxrd@z Thu Jan 1 00:00:00 1970 From: arend@broadcom.com (Arend van Spriel) Date: Sat, 9 Apr 2011 13:01:39 +0200 Subject: [RFC][PATCH] bcmai: introduce AI driver In-Reply-To: <1302333026.18361.8.camel@dev.znau.edu.ua> References: <1302033463-1846-1-git-send-email-zajec5@gmail.com> <1302333026.18361.8.camel@dev.znau.edu.ua> Message-ID: To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Sat, 09 Apr 2011 09:10:26 +0200, George Kashperko wrote: > >> On Fri, 08 Apr 2011 18:56:13 +0200, Rafa? Mi?ecki >> wrote: >> >> > 2011/4/6 Arend van Spriel : >> >> 3. Device identification >> >> >> >> The cores are identified by manufacturer, core id and revision in >> your >> >> patch. I would not use the revision because 4 out of 5 times a >> revision >> >> change does indicate a hardware change but no change in programming >> >> interface. The enumeration data does contain a more selective field >> >> indicating the core class (4 bits following the core identifier). I >> >> suggest >> >> to replace the revision field by this class field. >> > >> > Could you say something more about *class*, please? For my BCM43224 it >> > seems to be 0x0. WIll check BCM4313 in a moment. >> > >> >> In principal the manufacturer id is unique (defined/assigned by JEDEC >> www.jedec.org) and the chip id and chip class are defined by the >> manufacturer. So I can only indicate what classes Broadcom uses in >> combination with the manufacturer id BRCM, ARM and MIPS. >> >> /* Component Classes */ >> #define CC_SIM 0 >> #define CC_EROM 1 >> #define CC_CORESIGHT 9 >> #define CC_VERIF 0xb >> #define CC_OPTIMO 0xd >> #define CC_GEN 0xe >> #define CC_PRIMECELL 0xf >> >> Looking at this it seems strange that you see a class value of 0x0. It >> may >> be rarely used or for non-production chips only (for simulation, chip >> bringup) which may require additional (debug) functions. So question is >> whether you will need it, but it is specified by ARM and it is up to >> manufacturers to use it. So I it is better to be safe than sorry and >> have >> this in the device id. >> >> Gr. AvS > When parsing bcm4716 EROM I have > cia & CIA_CCL_MASK equal to 0 for all 9 cores > > You mentioned ARM DMP (Device Management Plugin) several times in > earlier messages some time ago but I can't find anything relevant about > that at ARM infocenter. Any chance you can point more precise location > for any DMP reference? I believe this is part of the CoreLink AMBA Designer tool, which is used to design/configure a SoC. The DMP is ARM system IP and so references are under ARM copyright. You need a special account with ARM to get access to these references. Gr. AvS -- "The world is indeed comic, but the joke is on mankind." ? H.P. Lovecraft