From: Kumar Gala <galak@kernel.crashing.org>
To: "maillist.kernel" <maillist.kernel@gmail.com>
Cc: linuxppc-dev <linuxppc-dev@ozlabs.org>
Subject: Re: How to support 3GB pci address?
Date: Thu, 11 Dec 2008 10:13:57 -0600 [thread overview]
Message-ID: <41706FC0-B740-42C0-BA2B-B9E4B5839477@kernel.crashing.org> (raw)
In-Reply-To: <200812112004118902765@gmail.com>
On Dec 11, 2008, at 6:04 AM, maillist.kernel wrote:
> Hi, we want to design a system using mpc8548, and linking with an
> idt 16 ports PCIE switch.
> In the system, the total PCI address needed is about 3GB, so I want
> to know how to support it in linux. mpc8548 has 36-bit real address,
> and can support 32GB PCIE address space, but in linux, there is only
> 1GB kernel space, how to map the 3GB pci address to kernel? Is the
> 36-bit real address only used to support large memory(>4GB) for muti-
> threads?
>
> Any suggestions please would be much appreciated!
>
> Thanks in advance for your help
The 36-bit support is current (in tree) in complete. Work is in
progress to add swiotlb support to PPC which will generically enable
what you want to accomplish.
- k
next prev parent reply other threads:[~2008-12-11 16:14 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-11 12:04 How to support 3GB pci address? maillist.kernel
2008-12-11 16:13 ` Kumar Gala [this message]
2008-12-12 4:07 ` Trent Piepho
2008-12-12 5:08 ` Kumar Gala
2008-12-12 9:04 ` Trent Piepho
2008-12-12 14:17 ` Kumar Gala
2008-12-12 17:13 ` Scott Wood
2008-12-12 20:34 ` Trent Piepho
2008-12-13 4:56 ` maillist.kernel
2008-12-13 22:11 ` Trent Piepho
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