Overview

New SOF firmware architecture is based on Zephyr RTOS and introduce new IPC4 Host protocol ABI. In result FW has been re-organized into layers. The interaction between the components across the layers is limited to the internally defined interfaces.

@startuml allowmixing scale max 1280 width package "SOF" { package "Application layer - user space" as APPLICATION_LAYER { component "3rd party algorithms" - private" as 3RD_PARTY_ALGOS component "Loadable libraries" as LOADABLE_COMPONENTS component "Built-in Processing components" as BUILTIN_COMPONENTS BUILTIN_COMPONENTS -[hidden]right- LOADABLE_COMPONENTS LOADABLE_COMPONENTS -[hidden]right- 3RD_PARTY_ALGOS } package "Kernel space" { package "Media Processing Pipelines layer - kernel extension" as KERNEL_EXTENSION { component "Communication" as COMMUNICATION component "Pipelines and Component Infrastructure" as PIPELINE_COMPONENT_INFRASTRUCTURE component "AVS Scheduling" as AVS_SCHEDULERS COMMUNICATION -[hidden]right- PIPELINE_COMPONENT_INFRASTRUCTURE PIPELINE_COMPONENT_INFRASTRUCTURE -[hidden]right- AVS_SCHEDULERS } package "Zephyr RTOS layer" as RTOS { component "Services" as SERVICES component "SoC HAL" as SOC component "Drivers" as DRIVERS SERVICES --[hidden]right-- SOC SOC --[hidden]right-- DRIVERS } APPLICATION_LAYER -[hidden]down- KERNEL_EXTENSION KERNEL_EXTENSION -[hidden]down- RTOS } } @enduml

Figure 42 SOF with Zephyr Architecture overview