Thread (66 messages) 66 messages, 10 authors, 2014-05-28

Re: [PATCH 06/17] pci: host: pcie-designware: Use *base-mask* for configuring the iATU

From: Arnd Bergmann <hidden>
Date: 2014-05-13 13:28:28
Also in: linux-arm-kernel, linux-omap, linux-pci, lkml

On Tuesday 13 May 2014 18:56:23 Kishon Vijay Abraham I wrote:
quoted
If you have a case where the outbound translation is a 256MB (i.e. 28bit)
section of the CPU address space, that could be represented as

      ranges = <0x82000000 0 0  0xb0000000  0 0x10000000>;

or 

      ranges = <0x82000000 0 0xb0000000  0xb0000000  0 0x10000000>;

depending on whether you want the BARs to be programmed using a low
address 0x0-0x0fffffff or an address matching the window
0xb0000000-0xbfffffff.
The problem is, for configuring the window starting at 0xb0000000, the ATU
should be programmed 0x0000000 (the cpu address for it will be 0xb0000000 though).
Then use the first of the two?

	Arnd
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