From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:37071) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YNXVV-0005kK-0j for qemu-devel@nongnu.org; Mon, 16 Feb 2015 21:03:26 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YNXVR-00047h-0F for qemu-devel@nongnu.org; Mon, 16 Feb 2015 21:03:24 -0500 Received: from mail-db3on0095.outbound.protection.outlook.com ([157.55.234.95]:41520 helo=emea01-db3-obe.outbound.protection.outlook.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YNXVQ-00047W-Nf for qemu-devel@nongnu.org; Mon, 16 Feb 2015 21:03:20 -0500 Message-ID: <54E28B87.4020002@ezchip.com> Date: Mon, 16 Feb 2015 19:29:59 -0500 From: Chris Metcalf MIME-Version: 1.0 References: <54DD17BC.5040006@sunrus.com.cn> <54DD180B.3080004@sunrus.com.cn> <54DE8DCA.6030302@sunrus.com.cn> <54DEBC3E.4000805@sunrus.com.cn> <54DEC303.6030502@ezchip.com> <54DF6F90.60406@sunrus.com.cn> <54E1669F.9090402@sunrus.com.cn> In-Reply-To: <54E1669F.9090402@sunrus.com.cn> Content-Type: text/plain; charset="utf-8"; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH 1/5] target-tile: Firstly add to qemu with minimized features List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Chen Gang S , Peter Maydell Cc: "walt@tilera.com" , Riku Voipio , qemu-devel , "rth@twiddle.net" Yes, I think there is a bit less documentation on tilegx SPRs available. If this becomes a blocker for you, let me know and I will see if there is anything we can do about it. Probably best to wait until you have made more progress on qemu before trying to make a case for it internally, though. On 2/15/2015 10:40 PM, Chen Gang S wrote: > Excuse me, I want to consult the related information about SPR. > > For SPRs (Special Purpose Register) under tilegx, I can not get related > documents (I only got the tilepro related document for SPR). After read > through the source code of Linux kernel for tile, I guess: > > - SPRs are in "arch/tile/include/uapi/arch/spr_def_64.h". > > - SPRs are all 64-bit registers (I referenced the 'interrupt_mask' and > CHIP_HAS_SPLIT_INTR_MASK to know about it). > > If what I guess is incorrect, please let me know. And welcome to provide > tilegx SPR related documents, too. > > Thanks. > > On 2/14/15 23:53, Chen Gang S wrote: >> On 2/14/15 13:47, Peter Maydell wrote: >>> On 14 February 2015 at 03:37, Chris Metcalf wrote: >>>> I'm not sure whether Tilera can simply re-release the tilegx-specific stuff >>>> from binutils as a separate tarball with GPL v2 licensing. Hopefully we can >>>> avoid having to figure that out. :-) >>> I believe it is theoretically possible (the usual FSF copyright arrangements >>> involve the original authors giving the copyright to the FSF but being >>> granted back a right to distribute their work under other licenses). >>> However it is definitely a "check with your lawyers" kind of question >>> and I entirely appreciate the desire to avoid having to go down that >>> route :-) >>> >> For me, the main feature of kernel disassembly implementation is almost >> the same as the feature of binutils disassembly implementation. And all >> of related code are not quite much (only several thousand lines), >> >> So at present, I guess, we needn't consider more about the related >> license. >> >> >> Thanks >> -- Chris Metcalf, EZChip Semiconductor http://www.ezchip.com