Bare metal runtime
ConceptA bare metal runtime is a lightweight software execution environment that runs directly on hardware without a full operating system. In the context of constrained microcontroller-class SoCs, bare-metal runtimes provide just enough system call interfaces and exception handling to support basic workloads, while advanced parallel ULP MCUs with their small main memories (<1MB) and lack of virtualization or security features typically only support simple bare-metal runtimes. Nexus-AM is a notable example, serving as a lightweight, multi-ISA bare metal runtime test generation environment that implements basic system call interfaces and exception handlers.
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Bare metal runtime
Definition
A bare metal runtime is a lightweight software execution environment that executes directly on hardware without the mediation of a full operating system. In contrast to hosted environments that rely on a rich OS kernel with process isolation, virtualization, and security services, a bare-metal runtime supplies only the minimal infrastructure — basic system call interfaces, exception handlers, and device abstractions — needed to run application code on a target processor.
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