AMC 20-193 Use of multi-core processors
Source document: Easy Access Rules for Acceptable Means of Compliance for Airworthiness of Products, Parts and Appliances (AMC-20) (Amendment 23)
AMC 20-193 Use of multi-core processors
Summary
The intended final configuration involves defining software and hardware settings for MCP resources. Key concepts include interference channels, items with defined interfaces, item development assurance levels, and MCP platforms. Robust partitioning ensures resource and time separation among applications, while safety nets provide protections against system misbehavior.
Related Questions
The intended final configuration refers to the setup of both software and hardware where the MCP resources are defined by implementing configuration settings and ensuring that all software components are installed on the target MCP.
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An 'Item' is defined as a hardware or software element that has bounded and well-defined interfaces, as per the definitions taken from ED-79A / ARP 4754A.
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The Item Development Assurance Level (IDAL) indicates the level of rigor applied to development assurance tasks for items. It corresponds to the appropriate software level in ED-12C / DO-178C and the design assurance level in ED-80 / DO-254, which must be satisfied for an item.
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Robust partitioning on an MCP platform includes both robust resource partitioning and robust time partitioning. This ensures that software partitions do not interfere with each other, maintaining their allocated resources and execution time, thereby preventing adverse effects from failures in one partition on others.
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An interference channel is a platform property that may lead to interference between software applications or tasks, potentially affecting their performance and reliability.
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