From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Rob Herring <robherring2@gmail.com>
Cc: Cyril Chemparathy <cyril@ti.com>,
linux-mips@linux-mips.org, x86@kernel.org, a-jacquiot@ti.com,
mahesh@linux.vnet.ibm.com, linus.walleij@linaro.org,
grant.likely@secretlab.ca, paul.gortmaker@windriver.com,
paulus@samba.org, hpa@zytor.com, m.szyprowski@samsung.com,
jonas@southpole.se, linux@arm.linux.org.uk,
linux-c6x-dev@linux-c6x.org, nico@linaro.org,
david.daney@cavium.com, mingo@redhat.com,
Geert Uytterhoeven <geert@linux-m68k.org>,
benh@kernel.crashing.org, suzuki@in.ibm.com, linux@openrisc.net,
arnd@arndb.de, microblaze-uclinux@itee.uq.edu.au,
devicetree-discuss@lists.ozlabs.org, msalter@redhat.com,
rob.herring@calxeda.com, tglx@linutronix.de,
linux-arm-kernel@lists.infradead.org, blogic@openwrt.org,
dhowells@redhat.com, monstr@monstr.eu,
linux-kernel@vger.kernel.org, ralf@linux-mips.org, tj@kernel.org,
linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH] of: specify initrd location using 64-bit
Date: Thu, 13 Sep 2012 08:47:06 +0200 [thread overview]
Message-ID: <5051816A.3050705@linutronix.de> (raw)
In-Reply-To: <505107DF.5020105@gmail.com>
On 09/13/2012 12:08 AM, Rob Herring wrote:
>> Geert is right here. If it is a physical address, it should be
>> phys_addr_t.
>
> While generally true, for the DT specific code I think it should be a
> fixed u64. The size of the address is defined by the FDT, not the
> kernel. It is very likely we could have a FDT that specifies addresses
> in 64-bit values, but then we boot a kernel is compiled for !LPAE.
> phys_addr_t is currently sized based on LPAE setting.
If your kernel is 32bit without PAE and your DTB address is >32ibt than
you can't handle it. If you don't notice this in your dt code than you
remap the wrong memory ioremap().
>
> Rob
>
Sebastian
WARNING: multiple messages have this Message-ID (diff)
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Rob Herring <robherring2@gmail.com>
Cc: linux-mips@linux-mips.org, a-jacquiot@ti.com,
mahesh@linux.vnet.ibm.com, linux@openrisc.net,
paul.gortmaker@windriver.com, paulus@samba.org, hpa@zytor.com,
m.szyprowski@samsung.com, jonas@southpole.se,
linux@arm.linux.org.uk, linux-c6x-dev@linux-c6x.org,
nico@linaro.org, x86@kernel.org, mingo@redhat.com,
suzuki@in.ibm.com, Cyril Chemparathy <cyril@ti.com>,
Geert Uytterhoeven <geert@linux-m68k.org>,
linus.walleij@linaro.org, arnd@arndb.de,
microblaze-uclinux@itee.uq.edu.au,
devicetree-discuss@lists.ozlabs.org, msalter@redhat.com,
rob.herring@calxeda.com, tglx@linutronix.de,
linux-arm-kernel@lists.infradead.org, blogic@openwrt.org,
dhowells@redhat.com, monstr@monstr.eu, david.daney@cavium.com,
linux-kernel@vger.kernel.org, ralf@linux-mips.org, tj@kernel.org,
linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH] of: specify initrd location using 64-bit
Date: Thu, 13 Sep 2012 08:47:06 +0200 [thread overview]
Message-ID: <5051816A.3050705@linutronix.de> (raw)
In-Reply-To: <505107DF.5020105@gmail.com>
On 09/13/2012 12:08 AM, Rob Herring wrote:
>> Geert is right here. If it is a physical address, it should be
>> phys_addr_t.
>
> While generally true, for the DT specific code I think it should be a
> fixed u64. The size of the address is defined by the FDT, not the
> kernel. It is very likely we could have a FDT that specifies addresses
> in 64-bit values, but then we boot a kernel is compiled for !LPAE.
> phys_addr_t is currently sized based on LPAE setting.
If your kernel is 32bit without PAE and your DTB address is >32ibt than
you can't handle it. If you don't notice this in your dt code than you
remap the wrong memory ioremap().
>
> Rob
>
Sebastian
WARNING: multiple messages have this Message-ID (diff)
From: bigeasy@linutronix.de (Sebastian Andrzej Siewior)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] of: specify initrd location using 64-bit
Date: Thu, 13 Sep 2012 08:47:06 +0200 [thread overview]
Message-ID: <5051816A.3050705@linutronix.de> (raw)
In-Reply-To: <505107DF.5020105@gmail.com>
On 09/13/2012 12:08 AM, Rob Herring wrote:
>> Geert is right here. If it is a physical address, it should be
>> phys_addr_t.
>
> While generally true, for the DT specific code I think it should be a
> fixed u64. The size of the address is defined by the FDT, not the
> kernel. It is very likely we could have a FDT that specifies addresses
> in 64-bit values, but then we boot a kernel is compiled for !LPAE.
> phys_addr_t is currently sized based on LPAE setting.
If your kernel is 32bit without PAE and your DTB address is >32ibt than
you can't handle it. If you don't notice this in your dt code than you
remap the wrong memory ioremap().
>
> Rob
>
Sebastian
next prev parent reply other threads:[~2012-09-13 6:48 UTC|newest]
Thread overview: 110+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-12 16:05 [PATCH] of: specify initrd location using 64-bit Cyril Chemparathy
2012-09-12 16:05 ` Cyril Chemparathy
2012-09-12 16:05 ` Cyril Chemparathy
2012-09-12 16:05 ` Cyril Chemparathy
2012-09-12 16:16 ` Geert Uytterhoeven
2012-09-12 16:16 ` Geert Uytterhoeven
2012-09-12 16:16 ` Geert Uytterhoeven
2012-09-12 18:02 ` Cyril Chemparathy
2012-09-12 18:02 ` Cyril Chemparathy
2012-09-12 18:02 ` Cyril Chemparathy
2012-09-12 18:02 ` Cyril Chemparathy
2012-09-12 18:02 ` Cyril Chemparathy
2012-09-12 19:58 ` Sebastian Andrzej Siewior
2012-09-12 19:58 ` Sebastian Andrzej Siewior
2012-09-12 19:58 ` Sebastian Andrzej Siewior
2012-09-12 22:08 ` Rob Herring
2012-09-12 22:08 ` Rob Herring
2012-09-12 22:08 ` Rob Herring
2012-09-13 6:47 ` Sebastian Andrzej Siewior [this message]
2012-09-13 6:47 ` Sebastian Andrzej Siewior
2012-09-13 6:47 ` Sebastian Andrzej Siewior
2012-09-13 21:02 ` Rob Herring
2012-09-13 21:02 ` Rob Herring
2012-09-13 21:02 ` Rob Herring
2012-09-12 20:23 ` Rob Herring
2012-09-12 20:23 ` Rob Herring
2012-09-12 20:23 ` Rob Herring
2012-09-12 20:31 ` Nicolas Pitre
2012-09-12 20:31 ` Nicolas Pitre
2012-09-12 20:31 ` Nicolas Pitre
2012-09-12 20:56 ` Rob Herring
2012-09-12 20:56 ` Rob Herring
2012-09-12 20:56 ` Rob Herring
2012-09-12 20:56 ` Rob Herring
2012-09-12 23:45 ` Cyril Chemparathy
2012-09-12 23:45 ` Cyril Chemparathy
2012-09-12 23:45 ` Cyril Chemparathy
2012-09-12 23:45 ` Cyril Chemparathy
2012-09-12 23:45 ` Cyril Chemparathy
-- strict thread matches above, loose matches on Subject: below --
2013-06-21 0:52 [PATCH] of: Specify " Santosh Shilimkar
2013-06-21 0:52 ` Santosh Shilimkar
2013-06-21 0:52 ` Santosh Shilimkar
2013-06-21 0:52 ` Santosh Shilimkar
2013-06-21 0:52 ` Santosh Shilimkar
2013-06-21 4:39 ` Vineet Gupta
2013-06-21 4:39 ` Vineet Gupta
2013-06-21 4:39 ` Vineet Gupta
2013-06-21 4:39 ` Vineet Gupta
2013-06-21 4:39 ` Vineet Gupta
2013-06-21 8:23 ` James Hogan
2013-06-21 8:23 ` James Hogan
2013-06-21 8:23 ` James Hogan
2013-06-21 8:23 ` James Hogan
2013-06-21 8:23 ` James Hogan
2013-06-21 17:12 ` Santosh Shilimkar
2013-06-21 17:12 ` Santosh Shilimkar
2013-06-21 17:12 ` Santosh Shilimkar
2013-06-21 17:12 ` Santosh Shilimkar
2013-06-21 17:12 ` Santosh Shilimkar
2013-06-21 9:04 ` Sebastian Andrzej Siewior
2013-06-21 9:04 ` Sebastian Andrzej Siewior
2013-06-21 9:04 ` Sebastian Andrzej Siewior
2013-06-21 9:04 ` Sebastian Andrzej Siewior
2013-06-21 17:20 ` Santosh Shilimkar
2013-06-21 17:20 ` Santosh Shilimkar
2013-06-21 17:20 ` Santosh Shilimkar
2013-06-21 17:20 ` Santosh Shilimkar
2013-06-21 17:20 ` Santosh Shilimkar
2013-06-27 20:54 ` Rob Herring
2013-06-27 20:54 ` Rob Herring
2013-06-27 20:54 ` Rob Herring
2013-06-27 20:54 ` Rob Herring
2013-06-28 7:54 ` Sebastian Andrzej Siewior
2013-06-28 7:54 ` Sebastian Andrzej Siewior
2013-06-28 7:54 ` Sebastian Andrzej Siewior
2013-06-28 7:54 ` Sebastian Andrzej Siewior
2013-06-28 9:59 ` Grant Likely
2013-06-28 9:59 ` Grant Likely
2013-06-28 9:59 ` Grant Likely
2013-06-28 9:59 ` Grant Likely
2013-06-28 13:49 ` Jean-Christophe PLAGNIOL-VILLARD
2013-06-28 13:49 ` Jean-Christophe PLAGNIOL-VILLARD
2013-06-28 13:49 ` Jean-Christophe PLAGNIOL-VILLARD
2013-06-28 13:49 ` Jean-Christophe PLAGNIOL-VILLARD
2013-06-28 23:43 ` Santosh Shilimkar
2013-06-28 23:43 ` Santosh Shilimkar
2013-06-28 23:43 ` Santosh Shilimkar
2013-06-28 23:43 ` Santosh Shilimkar
2013-06-28 23:43 ` Santosh Shilimkar
2013-06-29 8:34 ` Geert Uytterhoeven
2013-06-29 8:34 ` Geert Uytterhoeven
2013-06-29 8:34 ` Geert Uytterhoeven
2013-06-29 8:34 ` Geert Uytterhoeven
2013-07-01 7:48 ` Sebastian Andrzej Siewior
2013-07-01 7:48 ` Sebastian Andrzej Siewior
2013-07-01 7:48 ` Sebastian Andrzej Siewior
2013-07-01 7:48 ` Sebastian Andrzej Siewior
2013-07-01 7:59 ` Geert Uytterhoeven
2013-07-01 7:59 ` Geert Uytterhoeven
2013-07-01 7:59 ` Geert Uytterhoeven
2013-07-01 7:59 ` Geert Uytterhoeven
2013-07-01 8:09 ` Sebastian Andrzej Siewior
2013-07-01 8:09 ` Sebastian Andrzej Siewior
2013-07-01 8:09 ` Sebastian Andrzej Siewior
2013-07-01 8:09 ` Sebastian Andrzej Siewior
2013-07-01 13:58 ` Santosh Shilimkar
2013-07-01 13:58 ` Santosh Shilimkar
2013-07-01 13:58 ` Santosh Shilimkar
2013-07-01 13:58 ` Santosh Shilimkar
2013-07-01 13:58 ` Santosh Shilimkar
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