IntroductionThis page gives an overview of mutex driver which is available as part of the Xilinx Vivado and SDK distribution.
In a multi-processor environment, the processors share common resources. The Mutex core provides a mechanism for mutual exclusion to enable one process to gain exclusive access to a particular resource.
The Mutex core contains a configurable number of mutexes.
Each of these can be associated with a 32-bit user configuration register to store arbitrary data.
The source code for the driver is included with the Vitis Unified Software Platform installation, as well as being available in the Xilinx Github repository.
The driver source code is organized into different folders. The table below shows the ipipsu driver source organization.
Provides the API and data structure details
Driver .tcl and .mdd file
Example applications that show how to use the driver features
Driver source files
For a full list of features supported by this IP, please refer Chapter 73: Octal SPI Controller in Versal TRM
- Configurable number of AXI4-Lite interfaces from 0 to 8
- Configurable asynchronous or synchronous interface operation
- Configurable USER register
- Configurable number of mutexes
- Configurable CPUID width
- Configurable enhanced security through hardware identification support
Known Issues and Limitations
Refer to the driver examples directory for various example applications that exercise the different features of the driver. Each application is linked in the table below. The following sections describe the usage and expected output of the various applications. These example applications can be imported into the Vitis IDE from the Board Support Package settings tab.
Links to Examples
This example attempts to lock the Mutex from the processor identified as 0
to prevent the other processor from getting the lock.
Example Application Usage
Xilinx Zynq MP First Stage Boot Loader
Release 2021.1 May 4 2021 - 08:06:56
PMU-FW is not running, certain applications may not be supported.
PMU Firmware 2021.1 May 4 2021 08:06:56
PMU_ROM Version: xpbr-v8.1.0-0
MutexExample : Starts.
MutexExample : Successfully ran Mutex tapp Example
MutexExample : Ends.