From: swarren@wwwdotorg•org (Stephen Warren)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH 6/8] arm: mach-armada: add support for Armada XP board with device tree
Date: Tue, 15 May 2012 10:31:58 -0600 [thread overview]
Message-ID: <4FB284FE.10203@wwwdotorg.org> (raw)
In-Reply-To: <201205151437.55286.arnd@arndb.de>
On 05/15/2012 08:37 AM, Arnd Bergmann wrote:
> On Tuesday 15 May 2012, Ben Dooks wrote:
>>> * Maybe those mappings can be done using a normal ioremap() rather
>>> than in ->map_io(), according to DT informations (but most other ARM
>>> SoC support at the moment seem to do PCI mappings using static
>>> mappings in ->map_io)
>> That's a very old way of doing it. I'm pretty sure there's no reason to
>> get these allocated so early.
>
> Well, you might actually still want to use static mappings for any large
> areas that are accessed a lot in the kernel, because that lets you
> use larger page TLB entries, which ioremap by itself cannot. The host
> driver should however still use ioremap, it will now just get the area
> that was set up with map_io.
>
>> I believe you can probably leave the PCI/PCIe bindings until you have
>> enough kernel state to do ioremap() or similar and then associate the
>> necessary mappings with the bus creation.
>
> I think it was Stephen Warrent who told me that he can actually do
> a PCI host driver as a loadable module now, with only a few changes
> in the ARM core code.
Thierry Redding was working on this (actually, perhaps PCIe as a
platform driver rather than as a module, but I'm not sure) in the
context of the Tegra PCIe driver. See some of the patches at
http://patchwork.ozlabs.org/project/linux-tegra/list/, e.g. "PCI: Keep
pci_fixup_irqs() around after init" and "ARM: pci: Keep
pci_common_init() around after init" IIRC.
next prev parent reply other threads:[~2012-05-15 16:31 UTC|newest]
Thread overview: 140+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-15 8:54 [PATCH] arm: Add basic support for new Marvell Armada SoC family Thomas Petazzoni
2012-05-15 8:54 ` [PATCH 1/8] arm: mach-armada: add headers Thomas Petazzoni
2012-05-15 9:16 ` Ben Dooks
2012-05-15 10:57 ` Ben Dooks
2012-05-15 13:21 ` Rob Herring
2012-05-15 18:42 ` Nicolas Pitre
2012-05-15 8:54 ` [PATCH 2/8] arm: mach-armada: add source files Thomas Petazzoni
2012-05-15 9:12 ` Andrew Lunn
2012-05-15 9:17 ` Thomas Petazzoni
2012-05-15 9:54 ` Ben Dooks
2012-05-15 10:00 ` Arnaud Patard (Rtp)
2012-05-15 10:37 ` Ben Dooks
2012-05-15 9:27 ` Andrew Lunn
2012-05-15 9:54 ` Ben Dooks
2012-05-15 12:46 ` Lior Amsalem
2012-05-15 9:46 ` Ben Dooks
2012-05-15 9:59 ` Gregory CLEMENT
2012-05-15 10:03 ` Andrew Lunn
2012-05-19 6:21 ` Grant Likely
2012-05-16 14:27 ` Ben Dooks
2012-05-16 15:06 ` Ben Dooks
2012-05-15 8:54 ` [PATCH 3/8] arm: mach-armada: add documentation for new device tree bindings Thomas Petazzoni
2012-05-15 11:31 ` Ben Dooks
2012-05-15 8:54 ` [PATCH 4/8] arm: mach-armada: add compilation/configuration changes Thomas Petazzoni
2012-05-15 8:54 ` [PATCH 5/8] arm: mach-armada: add support for Armada 370 board with device tree Thomas Petazzoni
2012-05-15 8:54 ` [PATCH 6/8] arm: mach-armada: add support for Armada XP " Thomas Petazzoni
2012-05-15 9:58 ` Ben Dooks
2012-05-15 13:10 ` Lior Amsalem
2012-05-15 13:19 ` Andrew Lunn
2012-05-15 14:23 ` Arnd Bergmann
2012-05-15 18:37 ` Nicolas Pitre
2012-05-17 23:31 ` Jason Cooper
2012-05-15 13:33 ` Ben Dooks
2012-05-15 13:31 ` Rob Herring
2012-05-15 13:53 ` Ben Dooks
2012-05-15 14:16 ` Thomas Petazzoni
2012-05-15 14:25 ` Arnd Bergmann
2012-05-15 14:29 ` Thomas Petazzoni
2012-05-15 14:35 ` Ben Dooks
2012-05-15 14:53 ` Rob Herring
2012-05-15 15:01 ` Ben Dooks
2012-05-15 15:30 ` Russell King - ARM Linux
2012-05-15 14:32 ` Ben Dooks
2012-05-15 14:37 ` Arnd Bergmann
2012-05-15 16:31 ` Stephen Warren [this message]
2012-05-15 19:41 ` Arnd Bergmann
2012-05-15 14:58 ` Thomas Petazzoni
2012-05-15 15:07 ` Ben Dooks
2012-05-15 15:32 ` Arnd Bergmann
2012-05-15 15:46 ` Thomas Petazzoni
2012-05-15 21:22 ` Rob Herring
2012-05-15 15:49 ` Ben Dooks
2012-05-15 19:06 ` Arnd Bergmann
2012-05-15 15:41 ` Russell King - ARM Linux
2012-05-15 15:59 ` Ben Dooks
2012-05-15 16:03 ` Russell King - ARM Linux
2012-05-17 23:35 ` Jason Cooper
2012-05-18 2:12 ` Rob Herring
2012-05-22 12:00 ` Ben Dooks
2012-05-22 13:34 ` Jason Cooper
2012-05-22 17:06 ` Arnd Bergmann
2012-05-23 2:02 ` Haojian Zhuang
2012-05-15 8:54 ` [PATCH 7/8] arm: mach-armada: add defconfig Thomas Petazzoni
2012-05-15 9:58 ` Ben Dooks
2012-05-15 12:54 ` Thomas Petazzoni
2012-05-15 8:54 ` [PATCH 8/8] arm: mach-armada: add entry to MAINTAINERS Thomas Petazzoni
2012-05-15 9:18 ` [PATCH] arm: Add basic support for new Marvell Armada SoC family Andrew Lunn
2012-05-15 9:44 ` Thomas Petazzoni
2012-05-15 9:51 ` Ben Dooks
2012-05-15 9:55 ` Thomas Petazzoni
2012-05-15 13:15 ` Andrew Lunn
2012-05-15 14:35 ` Rob Herring
2012-05-15 14:44 ` Thomas Petazzoni
2012-05-15 15:27 ` Arnd Bergmann
2012-05-15 15:39 ` Thomas Petazzoni
2012-05-15 16:26 ` Arnd Bergmann
2012-05-15 21:35 ` Arnd Bergmann
2012-05-16 0:25 ` Nicolas Pitre
2012-05-16 5:07 ` Andrew Lunn
2012-05-16 6:57 ` Arnd Bergmann
2012-05-16 6:57 ` Haojian Zhuang
2012-05-16 17:30 ` Andrew Lunn
2012-05-15 18:20 ` Nicolas Pitre
2012-05-15 16:22 ` Andrew Lunn
2012-05-15 16:25 ` Ben Dooks
2012-05-15 16:30 ` Andrew Lunn
2012-05-15 16:37 ` Ben Dooks
2012-05-16 11:12 ` Lior Amsalem
2012-05-16 11:36 ` Andrew Lunn
2012-05-16 12:00 ` Arnd Bergmann
2012-05-16 14:55 ` Lior Amsalem
2012-05-16 15:20 ` Nicolas Pitre
2012-05-16 15:28 ` Arnd Bergmann
2012-05-16 16:49 ` Nicolas Pitre
2012-05-16 19:46 ` Arnd Bergmann
2012-05-16 20:20 ` Nicolas Pitre
2012-05-16 20:34 ` Arnd Bergmann
2012-05-18 19:20 ` Jason Cooper
2012-05-22 12:03 ` Ben Dooks
2012-05-18 19:18 ` Jason Cooper
2012-05-18 20:44 ` Arnd Bergmann
2012-05-18 22:51 ` Nicolas Pitre
2012-05-19 11:24 ` Jason Cooper
2012-05-19 17:32 ` Arnd Bergmann
2012-05-20 0:45 ` Nicolas Pitre
2012-05-20 9:55 ` Russell King - ARM Linux
2012-05-20 10:58 ` Arnd Bergmann
2012-05-20 11:10 ` Russell King - ARM Linux
2012-05-21 1:30 ` Jason Cooper
2012-05-21 7:58 ` Arnd Bergmann
2012-05-21 9:30 ` Russell King - ARM Linux
2012-05-21 15:35 ` Jason Cooper
2012-05-21 16:11 ` Russell King - ARM Linux
2012-05-21 16:58 ` Jason Cooper
2012-05-21 19:40 ` Arnd Bergmann
2012-05-22 14:25 ` Nicolas Pitre
2012-05-22 16:03 ` Jason Cooper
2012-05-22 16:06 ` Ben Dooks
2012-05-22 16:16 ` Jason Cooper
2012-05-24 11:18 ` Ben Dooks
2012-05-22 17:09 ` Arnd Bergmann
2012-05-21 8:55 ` Ben Dooks
2012-05-21 9:16 ` Andrew Lunn
2012-05-21 9:27 ` Ben Dooks
2012-05-21 9:40 ` Andrew Lunn
2012-05-21 15:39 ` Jason Cooper
2012-05-21 17:27 ` Andrew Lunn
2012-05-15 11:06 ` Arnd Bergmann
2012-05-15 12:50 ` Thomas Petazzoni
2012-05-15 16:03 ` Ben Dooks
2012-05-15 11:18 ` Ben Dooks
2012-05-15 12:26 ` Lior Amsalem
2012-05-15 12:51 ` Thomas Petazzoni
2012-05-15 11:20 ` Ben Dooks
2012-05-15 12:29 ` Lior Amsalem
2012-05-15 14:55 ` Ben Dooks
2012-05-15 15:00 ` Thomas Petazzoni
2012-05-15 15:07 ` Ben Dooks
2012-05-15 15:36 ` Ben Dooks
2012-05-15 15:39 ` Thomas Petazzoni
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