Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754881Ab1ERH1q (ORCPT ); Wed, 18 May 2011 03:27:46 -0400 Received: from mho-04-ewr.mailhop.org ([204.13.248.74]:43886 "EHLO mho-02-ewr.mailhop.org" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754459Ab1ERH1p (ORCPT ); Wed, 18 May 2011 03:27:45 -0400 X-Mail-Handler: MailHop Outbound by DynDNS X-Originating-IP: 72.249.23.125 X-Report-Abuse-To: abuse@dyndns.com (see http://www.dyndns.com/services/mailhop/outbound_abuse.html for abuse reporting information) X-MHO-User: U2FsdGVkX1/A0rv8CTF3/UP2Soq4ydvT Date: Wed, 18 May 2011 10:27:38 +0300 From: Tony Lindgren To: Catalin Marinas Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Russell King - ARM Linux Subject: Re: [PATCH v5 15/19] ARM: LPAE: Add support for cpu_v7_do_(suspend|resume) Message-ID: <20110518072737.GC6815@atomide.com> References: <1304859098-10760-1-git-send-email-catalin.marinas@arm.com> <1304859098-10760-16-git-send-email-catalin.marinas@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1304859098-10760-16-git-send-email-catalin.marinas@arm.com> User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2816 Lines: 88 Hi, One question below regarding the ifdefs in this series. * Catalin Marinas [110508 15:52]: > With LPAE, the TTBRx size is 64-bit so make sure that all the > information is saved and restored. > > Signed-off-by: Catalin Marinas > --- > arch/arm/mm/proc-v7.S | 22 ++++++++++++++++++++++ > 1 files changed, 22 insertions(+), 0 deletions(-) > > diff --git a/arch/arm/mm/proc-v7.S b/arch/arm/mm/proc-v7.S > index ad22628..3e6999e 100644 > --- a/arch/arm/mm/proc-v7.S > +++ b/arch/arm/mm/proc-v7.S > @@ -260,19 +260,32 @@ cpu_v7_name: > > /* Suspend/resume support: derived from arch/arm/mach-s5pv210/sleep.S */ > .globl cpu_v7_suspend_size > +#ifdef CONFIG_ARM_LPAE > +.equ cpu_v7_suspend_size, 4 * 10 > +#else > .equ cpu_v7_suspend_size, 4 * 8 > +#endif > #ifdef CONFIG_PM_SLEEP > ENTRY(cpu_v7_do_suspend) > stmfd sp!, {r4 - r11, lr} > mrc p15, 0, r4, c13, c0, 0 @ FCSE/PID > mrc p15, 0, r5, c13, c0, 1 @ Context ID > mrc p15, 0, r6, c3, c0, 0 @ Domain ID > +#ifdef CONFIG_ARM_LPAE > + mrrc p15, 0, r7, r8, c2 @ TTB 0 > + mrrc p15, 1, r2, r3, c2 @ TTB 1 > +#else > mrc p15, 0, r7, c2, c0, 0 @ TTB 0 > mrc p15, 0, r8, c2, c0, 1 @ TTB 1 > +#endif > mrc p15, 0, r9, c1, c0, 0 @ Control register > mrc p15, 0, r10, c1, c0, 1 @ Auxiliary control register > mrc p15, 0, r11, c1, c0, 2 @ Co-processor access control > +#ifdef CONFIG_ARM_LPAE > + stmia r0, {r2 - r11} > +#else > stmia r0, {r4 - r11} > +#endif > ldmfd sp!, {r4 - r11, pc} > ENDPROC(cpu_v7_do_suspend) > > @@ -280,12 +293,21 @@ ENTRY(cpu_v7_do_resume) > mov ip, #0 > mcr p15, 0, ip, c8, c7, 0 @ invalidate TLBs > mcr p15, 0, ip, c7, c5, 0 @ invalidate I cache > +#ifdef CONFIG_ARM_LPAE > + ldmia r0, {r2 - r11} > +#else > ldmia r0, {r4 - r11} > +#endif > mcr p15, 0, r4, c13, c0, 0 @ FCSE/PID > mcr p15, 0, r5, c13, c0, 1 @ Context ID > mcr p15, 0, r6, c3, c0, 0 @ Domain ID > +#ifdef CONFIG_ARM_LPAE > + mcrr p15, 0, r7, r8, c2 @ TTB 0 > + mcrr p15, 1, r2, r3, c2 @ TTB 1 > +#else > mcr p15, 0, r7, c2, c0, 0 @ TTB 0 > mcr p15, 0, r8, c2, c0, 1 @ TTB 1 > +#endif > mcr p15, 0, ip, c2, c0, 2 @ TTB control register > mcr p15, 0, r10, c1, c0, 1 @ Auxiliary control register > mcr p15, 0, r11, c1, c0, 2 @ Co-processor access control Do we really need all this ifdef else throughout this series? I think we already have things in place to do this dynamically like we already do for thumb, smp_on_up, v6 vs v7 and so on. Otherwise we'll end up with every second line of ifdef else.. Regards, Tony -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/