Table of Contents
Introduction
This page gives an overview of ipipsu driver which is available as part of the Xilinx Vivado and SDK distribution.
The heterogeneous multiprocessor system uses the inter-processor interrupt (IPI) structure
to exchange short interrupt-driven messages between processors in the system. The IPI
architecture allows the passing of messages across the system without the complications of
autonomous read-write transactions and polling inefficiency.
Source path for the driver:
https://github.com/Xilinx/embeddedsw/tree/master/XilinxProcessorIPLib/drivers/ipipsu/src
...
IPI Features
The IPIPSU block, provides the following features.- Supports processor communications including both an IPI interrupt structure and memory buffers to
exchange short private 32B messages between eight IPI agents. - Supports both blocking and nonblocking calls.
Links to Examples
Examples Path:
https://github.com/Xilinx/embeddedsw/tree/master/XilinxProcessorIPLib/drivers/ipipsu/examples
| Test Name | Example Source | Description |
|---|---|---|
| IPIPSU example | This examples sends a message to itself and confirms the message. |
IPIPSU example
This example sends a message to itself and receives it.
Expected Output
| Code Block |
|---|
Hello IPI! [Build: Jul 2 2021 07:11:56] Interrupt ID: 67 Message Content: W0: 0x5851F42D W1: 0x40B18CCF W2: 0x4BB5F646 W3: 0x47033129 W4: 0x30705B04 W5: 0x20FD5DB4 W6: 0x1A8B7F78 W7: 0x502959D8 Triggering IPI and Waiting for Response... ---->Enter Interrupt Handler Message Received: W0: 0x5851F42D W1: 0x40B18CCF W2: 0x4BB5F646 W3: 0x47033129 W4: 0x30705B04 W5: 0x20FD5DB4 W6: 0x1A8B7F78 W7: 0x502959D8 Sent back Inverted Message. <----Exit Interrupt Handler Received response. Message : Response W0 -> 0x5851F42D : 0xA7AE0BD2 W1 -> 0x40B18CCF : 0xBF4E7330 W2 -> 0x4BB5F646 : 0xB44A09B9 W3 -> 0x47033129 : 0xB8FCCED6 W4 -> 0x30705B04 : 0xCF8FA4FB W5 -> 0x20FD5DB4 : 0xDF02A24B W6 -> 0x1A8B7F78 : 0xE5748087 W7 -> 0x502959D8 : 0xAFD6A627 Successfully ran Ipipsu selftest Example |
Changelog
20192021.1
- None
2019.2
- None
2020.1
- https://github.com/Xilinx/embeddedsw/blob/masterxilinx_v2021.1/doc/ChangeLog#L2347ChangeLog#L490
2020.2
20212020.1
- https://github.com/Xilinx/embeddedsw/blob/xilinx_v2021.1master/doc/ChangeLog#L490ChangeLog#L2347
Related Links
- NA