From: robherring2@gmail.com (Rob Herring)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 00/15] PCI io.h clean-up
Date: Mon, 16 Jul 2012 09:03:15 -0500 [thread overview]
Message-ID: <50041F23.2010908@gmail.com> (raw)
In-Reply-To: <20120716075214.GA2489@lunn.ch>
On 07/16/2012 02:52 AM, Andrew Lunn wrote:
> On Fri, Jul 13, 2012 at 09:03:56PM -0500, Rob Herring wrote:
>> From: Rob Herring <rob.herring@calxeda.com>
>>
>> This is the 2nd part of mach/io.h removals. This series removes io.h on
>> platforms with PCI by creating a fixed virtual I/O mapping and a common
>> __io() macro.
>
> Hi Rob
>
> Time to show my ignorance of PCI again.
>
> root at orion5x:~# cat /proc/ioports
> 00001000-0000ffff : PCI0 I/O
> 00010000-0001ffff : PCI1 I/O
>
> The changes you made for Orion decreased the window to 64K. However, i
> see here that PCI0 only gets 60K, where as PCI1 gets the full 64K.
>
> Is this asymmetry correct?
First, thanks for testing.
PC's only have 64K, so that should be enough for any platform. 0-0x1000
is reserved for legacy ISA range. Even if we set the start to 0,
pcibios_min_io would still limit it to above 0x1000.
Also, based on the address translation masking on these platforms, I
believe it should be okay to start the PCI bus address on a 64K boundary.
Rob
>
> I see this for both orion5x and kirkwood.
>
> Thanks
> Andrew
>
prev parent reply other threads:[~2012-07-16 14:03 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-14 2:03 [PATCH v2 00/15] PCI io.h clean-up Rob Herring
2012-07-14 2:03 ` [PATCH v2 01/15] ARM: Add fixed PCI i/o mapping Rob Herring
2012-07-14 12:22 ` Nicolas Pitre
2012-07-16 4:35 ` Rob Herring
2012-07-16 13:32 ` Nicolas Pitre
2012-07-14 2:03 ` [PATCH v2 02/15] ARM: move PCI i/o resource setup into common code Rob Herring
2012-07-14 2:03 ` [PATCH v2 03/15] ARM: versatile: use fixed PCI i/o mapping Rob Herring
2012-07-14 2:04 ` [PATCH v2 04/15] ARM: tegra: " Rob Herring
2012-07-14 2:04 ` [PATCH v2 05/15] ARM: integrator: " Rob Herring
2012-07-14 21:49 ` Linus Walleij
2012-07-17 17:04 ` Will Deacon
2012-07-17 18:02 ` Rob Herring
2012-07-21 14:31 ` Will Deacon
2012-07-21 21:56 ` Arnd Bergmann
2012-07-22 13:09 ` Rob Herring
2012-07-22 15:08 ` Will Deacon
2012-07-22 16:22 ` Rob Herring
2012-07-23 12:19 ` Will Deacon
2012-07-23 14:05 ` Rob Herring
2012-07-23 14:50 ` Linus Walleij
2012-07-14 2:04 ` [PATCH v2 06/15] ARM: integrator: remove trailing whitespace on pci_v3.c Rob Herring
2012-07-14 2:04 ` [PATCH v2 07/15] ARM: shark: use fixed PCI i/o mapping Rob Herring
2012-07-14 2:04 ` [PATCH v2 08/15] ARM: footbridge: " Rob Herring
2012-07-14 2:04 ` [PATCH v2 09/15] ARM: dove: " Rob Herring
2012-07-14 2:04 ` [PATCH v2 10/15] ARM: kirkwood: " Rob Herring
2012-07-16 7:10 ` Andrew Lunn
2012-07-16 14:17 ` Rob Herring
2012-07-16 16:25 ` Arnd Bergmann
2012-07-14 2:04 ` [PATCH v2 11/15] ARM: orion5x: " Rob Herring
2012-07-14 2:04 ` [PATCH v2 12/15] iop13xx: use more regular PCI I/O space handling Rob Herring
2012-07-14 2:04 ` [PATCH v2 13/15] ARM: iop13xx: use fixed PCI i/o mapping Rob Herring
2012-07-14 2:04 ` [PATCH v2 14/15] ARM: mv78xx0: use fixed pci " Rob Herring
2012-07-14 2:04 ` [PATCH v2 15/15] ARM: iop3xx: use fixed PCI " Rob Herring
2012-07-14 7:57 ` [PATCH v2 00/15] PCI io.h clean-up Arnd Bergmann
2012-07-14 12:26 ` Nicolas Pitre
2012-07-14 14:54 ` Rob Herring
2012-07-16 7:52 ` Andrew Lunn
2012-07-16 9:17 ` Arnd Bergmann
2012-07-16 14:03 ` Rob Herring [this message]
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