From mboxrd@z Thu Jan 1 00:00:00 1970 From: arnd@arndb.de (Arnd Bergmann) Date: Fri, 14 Jun 2013 14:56:15 +0200 Subject: [PATCH v2] ARM: mmp: bring up pxa988 with device tree support In-Reply-To: References: <1369969115-4279-1-git-send-email-zhangwm@marvell.com> <201306101035.20924.arnd@arndb.de> Message-ID: <2766142.mFu63TyH69@wuerfel> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Friday 14 June 2013 17:15:33 Chao Xie wrote: > On Mon, Jun 10, 2013 at 4:35 PM, Arnd Bergmann wrote: > > I guess that is a problem we have on other platforms as well, we should > > find a generic solution for that. It would be nice to reserve a page > > in "fixmap" and have common code map the SCU page into that. > > > > So you mean that reserve a page in arch/arm/asm/include/fixmap.h? Yes. > This reserve will depend on the cpu type beacuse only A9 will have SCU part. I think A5 and ARM11MPCore as well. > I do not know that in fixmap, the #ifdef is acceptable or not. Yes, it is. We don't really use fixmap on ARM for anything other than kmap_atomic at the moment. Please have a look at the powerpc and x86 implementations. > For the common code to map the SCU page, where do you suggest to put it? arch/arm/kernel/smp_scu.c. Arnd