JAJSFW1E June 2017 – March 2019 66AK2G12
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This chapter describes the operation of the Semaphore hardware module. The Semaphore module is accessible across all the cores on a multicore environment. The module supports up to 64 independent semaphores that help the application to implement shared-resource protection mechanism across multiple cores. Each of the semaphores can be accessed by the cores in direct, indirect, or combined modes.
In a multicore environment where system resources must be shared it is important to control simultaneous accesses to the available resources. To ensure correct system operation, it is necessary to limit access to a resource by one and only one core at a time; that is, it is necessary to provide mutual exclusion for resources shared across multiple cores.
The Semaphore module provides a mechanism that applications can use to implement mutual exclusion of shared resources across multiple cores. The following CPU cores can be semaphore masters on this device:
The Semaphore module supports the following features:
For more information, see section Semaphore Module in chapter Interprocessor Communication of the Device TRM.