Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755763Ab2JWQ0u (ORCPT ); Tue, 23 Oct 2012 12:26:50 -0400 Received: from mailserver6.natinst.com ([130.164.80.6]:41140 "EHLO spamkiller06.natinst.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752880Ab2JWQ0t (ORCPT ); Tue, 23 Oct 2012 12:26:49 -0400 Date: Tue, 23 Oct 2012 11:26:41 -0500 From: Josh Cartwright To: Arnd Bergmann Cc: arm@kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, John Linn Subject: Re: [PATCH v2 2/4] zynq: move static peripheral mappings Message-ID: <20121023162641.GG20593@beefymiracle.amer.corp.natinst.com> References: <20121022211219.GC31538@beefymiracle.amer.corp.natinst.com> <201210231450.11540.arnd@arndb.de> MIME-Version: 1.0 In-Reply-To: <201210231450.11540.arnd@arndb.de> User-Agent: Mutt/1.5.21 (2011-07-01) X-MIMETrack: Itemize by SMTP Server on MailServ59-US/AUS/H/NIC(Release 8.5.3FP2 HF169|September 14, 2012) at 10/23/2012 11:26:36 AM, Serialize by Router on MailServ59-US/AUS/H/NIC(Release 8.5.3FP2 HF169|September 14, 2012) at 10/23/2012 11:26:37 AM, Serialize complete at 10/23/2012 11:26:37 AM Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="YkJPYEFdoxh/AXLE" Content-Disposition: inline X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.7.7855,1.0.431,0.0.0000 definitions=2012-10-23_05:2012-10-23,2012-10-23,1970-01-01 signatures=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4357 Lines: 123 --YkJPYEFdoxh/AXLE Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hey Arnd- Thanks for the review/suggestions. On Tue, Oct 23, 2012 at 02:50:11PM +0000, Arnd Bergmann wrote: > On Monday 22 October 2012, Josh Cartwright wrote: > > Shifting them up into the vmalloc region prevents the following warning, > > when booting a zynq qemu target with more than 512mb of RAM: > >=20 > > BUG: mapping for 0xe0000000 at 0xe0000000 out of vmalloc space > >=20 > > In addition, it allows for reuse of these mappings when the proper > > drivers issue requests via ioremap(). > >=20 > > Signed-off-by: Josh Cartwright >=20 > This looks like a bug fix that should be backported to older kernels, > so it would be good to add 'Cc: stable@vger.kernel.org' below your > Signed-off-by. Will-do, thanks. > > diff --git a/arch/arm/mach-zynq/include/mach/zynq_soc.h b/arch/arm/mach= -zynq/include/mach/zynq_soc.h > > index d0d3f8f..ae3b236 100644 > > --- a/arch/arm/mach-zynq/include/mach/zynq_soc.h > > +++ b/arch/arm/mach-zynq/include/mach/zynq_soc.h > > @@ -15,33 +15,37 @@ > > #ifndef __MACH_XILINX_SOC_H__ > > #define __MACH_XILINX_SOC_H__ > > =20 > > +#include > > + > > #define PERIPHERAL_CLOCK_RATE 2500000 > > =20 > > -/* For now, all mappings are flat (physical =3D virtual) > > +/* Static peripheral mappings are mapped at the top of the > > + * vmalloc region > > */ > > -#define UART0_PHYS 0xE0000000 > > -#define UART0_VIRT UART0_PHYS > > +#define UART0_PHYS 0xE0000000 > > +#define UART0_SIZE SZ_4K > > +#define UART0_VIRT (VMALLOC_END - UART0_SIZE) >=20 > There are plans to move the uart location into a fixed virtual > address in the future, but it hasn't been decided yet. > It will still need a fixed mapping though, just to a different > address. >=20 > > -#define TTC0_PHYS 0xF8001000 > > -#define TTC0_VIRT TTC0_PHYS > > +#define TTC0_PHYS 0xF8001000 > > +#define TTC0_SIZE SZ_4K > > +#define TTC0_VIRT (UART0_VIRT - TTC0_SIZE) >=20 > It's quite likely that this does not have to be a fixed mapping > any more. Just have a look at how drivers/clocksource/dw_apb_timer_of.c > calls of_iomap() to get the address. Yes, this is already on my list of plans. The in-tree TTC driver unfortunately doesn't yet support device tree bindings. Are you comfortable waiting on the DT-ification of the TTC in a follow-up patchset? > > -#define PL310_L2CC_PHYS 0xF8F02000 > > -#define PL310_L2CC_VIRT PL310_L2CC_PHYS > > +#define PL310_L2CC_PHYS 0xF8F02000 > > +#define PL310_L2CC_SIZE SZ_4K > > +#define PL310_L2CC_VIRT (TTC0_VIRT - PL310_L2CC_SIZE) >=20 > This address would not need a fixed mapping by calling l2x0_of_init > rather than l2x0_init. Great, I'll take care of this. > > -#define SCU_PERIPH_PHYS 0xF8F00000 > > -#define SCU_PERIPH_VIRT SCU_PERIPH_PHYS > > +#define SCU_PERIPH_PHYS 0xF8F00000 > > +#define SCU_PERIPH_SIZE SZ_8K > > +#define SCU_PERIPH_VIRT (PL310_L2CC_VIRT - SCU_PERIPH_SIZE) >=20 > And your patch 3 already obsoletes this mapping. I'll spin up a reordered patchset to eliminate this odd state. Thanks again, Josh --YkJPYEFdoxh/AXLE Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.19 (GNU/Linux) iQIcBAEBAgAGBQJQhsVBAAoJEEef0niEbw+l8dAQAI+pO3+1g/aR1ynTkJCgsQ84 ecC4nuUG5JHi/o8vYsS2N0WUKSkwKMkk7wFxWmKrIZ79L4voYU+uaHmy0faimPrO VGr1QzOJxLNweNgeUb8SK47/T4HImhQHmhLKkyLlGY0fVeL1Q81TI4p1b/1iQnL8 q5uFFwid5NFgS4d5yFYNgxJPQkeel6+SNeLIOX+vqlUU4Su2AuvhYg/Q0APtXSYh pTLET9dYLqWiFaDBQfQ9sRnfRePnsKZtBmQE17C1pEPx/ey01GN+GbjHKRurdu4N goLlAMmkwN9zFEM3qTjVyQo9MZKCoSPGMOw+zxlfUvvqtjAwHkhNAedEe5bsOK11 JFsQL9GiXuNQLBwg3LApnwpz4RMLeEFs5WjCircQD/DS+Cudcztk2KsnDjL79rTl WcCHPUldYz64Hb8g1hG176VglQ55odsjVIwtifNEV1d4/rET5fCFTX6Szd17+XDw 6R/Akx3LRPzevpsH0DiJhzaSO+McNx5Xvm8NMtCX09/37dqaoZmfmxlBaQu563WW vrT+wRVJ3l8NZK9ztQvpuuuYZLAedJtvW8O/Q4ikS8tcm5dTaYZiIq5wP/AxxXvI tOhwHufcjKN4b4yYiucj3aOBSHnc8e3YWSoyJLpg6C4MpczhXbvIfkjMyGllnmAM 5d37ljLJvYmb3OP3BEr2 =1KaH -----END PGP SIGNATURE----- --YkJPYEFdoxh/AXLE-- -- 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/