i.MX ProcessorsのトピックRe: question about pcie

question about pcie

ainolike — Thu, 21 Apr 2016 05:24:06 GMT

I'm testing PCIe with SABRE lite board. there are some questions about PCIe.

a) In chapter memory map of IMX6DQRM, it assigns a range of address as follows.

Start address End address Size Description

01FF_C000 01FF_FFFF 16KB PCIe register

0100_0000 01FF_BFFF 16368KB PCIe

I want to know the usage of the 16368KB space. Is PCIe BAR must mapped to this memory space? And is the size of BAR space must less than 16368KB?

b) I have had my board work in RC mode. How can I set PCIe working in EP mode?

Re: question about pcie

art — Fri, 22 Apr 2016 05:28:14 GMT

a) Please refer to the Chapter 40 of the attached document.

b) There is no EP functionality implementation in the current Linux BSP driver.

Have a great day,
Artur

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Re: question about pcie

Yuri — Fri, 22 Apr 2016 07:20:31 GMT

Hello,

as for PCIe EP mode - perhaps the following helps.

Configuring the kernel for RC/EP communication

Regards,

Yuri.