XBAR

[abdelrhman]

if HPE (high priority elevation) is enabled, in which cases the master may raise its priority ?? 

[davidtosenovjan]

On this device only FlexRay module is capable to elevate XBAR priority. I am looking for the mechanism.

davidtosenovjan_0-1642606724325.png

[abdelrhman]

so, in which scenarios the flexray may send high priority request?

[davidtosenovjan]

I just obtained an answer from design

Flexray: The flexray’s high priority signal to the platform is tied high. Thus, if the flexray HPE bit is set, then all flexray transactions are considered high priority.

However I just noticed there is also addendum in RM telling that HPE also works with CPU and DMA

davidtosenovjan_0-1644496179422.png

I am apologizing I haven't noticed.

[davidtosenovjan]

This is not clear to us. We have send a question to the design as it seems not to be comprehensively documented. I will return to you as I can.

[davidtosenovjan]

Could you specify used device?

[abdelrhman]

MPC5744p