DM816x PCIe outbound window question

Adrew Huang

Hi all,

I am setting PCIe outbound window and got a question when I want to access outbound PCIe memory space via internal address in A8.

In Outbound Address Translations section example 1 of SPRUGX8-1, it says that OCP/Internal addresses 9D3A 1234h, 913A 1234h,

953A 1234h, 993A 1234h, etc., are few of other OCP/Internal Physical values that will all map to the same PCIe address 3344 5566 56FA 1234h.

(where application software has initialized OBOFFSET9_HI with 3344 5566h and OB_OFFSET9 with 56Ex xxxxh )

I am wonder how the read/write operations in 9D3A 1234h aforementioned won't access to DDR EMIF block (0x8000 0000 - 0xBFFF FFFF).

Or I miss something ??

Thanks

Andrew

over 14 years ago

0 Adrew Huang over 14 years ago

Prodigy 230 points

Is there anyone could help me ??

Andrew

0 MarcPyne over 14 years ago in reply to Adrew Huang

TI__Mastermind 25055 points

Andrew,

We are looking into this and will get back to you soon.

Regards,
Marc

0 Gus Martinez over 14 years ago in reply to MarcPyne

TI__Mastermind 28901 points

I think the address used in the example is some random address which does not actually apply to the memory map of the DM816x device. All PCIe outbound transfers should fall within the 0x2000 0000 to 0x2FFF FFFF range allocated for PCIe transfers.

0 Adrew Huang over 14 years ago in reply to Gus Martinez

Prodigy 230 points

I totally agreed with you. We already implement this in our PCIe driver and it works fine.

Thanks for your andswer.

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DM816x PCIe outbound window question