PCIe memory alignment and size

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PCIe memory alignment and size

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jimmykwon
Contributor I

we have 4 EP devices each have 8MB access requirement.

but i can read from manual "PCIe max memory alignment is 16MB for i.MX 6 quad."

Can i.MX 6 access 4 EP devices each have 8MB ?

In iATU, it can has 4 regions. then

first iATU set : 8MB  for first EP

second iATU set : 8MB for second EP

third iATU set : 8MB for third EP

fourth iATU set : 8MB for fourth EP

is it possible ?

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art
NXP TechSupport
NXP TechSupport

Q. Can i.MX 6 access 4 EP devices each have 8MB ?

A. Unfortunately, no. The total amount of memory for all endpoints is limited to 16MB.


Have a great day,
Artur

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