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DM816x: PCIe io space mapping support problem

jason lee
Prodigy 10 points

Hi,

did DM816x PCIe RC driver support PCIe io mapping card ?

in http://processors.wiki.ti.com/index.php/DM81xx_AM38xx_PCI_Express_Root_Complex_Driver_User_Guide#Features

I/O Window
Since ARM architecture does not have I/O bus for I/O access, we reserve a memory window to perform PCIe I/O to EPs supporting I/O.

  • 0x40000000-0x402FFFFF: Used as 3MB I/O window
  • Note that the selection of the I/O space is done such that it does not conflict with the normal memory mapped space to allow software to distinguish between PCIe I/O and normal memory mapped access.