What is a Safety Package?

A Safety Package is an Arm product that enables Arm IP to be used in safety-related systems for markets such as automotive, industrial, avionics and others. The Safety Package includes a set of documentation artifacts or evidence and any specific safety claims and results of certification activities that Arm holds for an individual IP. The documentation provides partners with information for the Arm IP in support of their safety argumentation and as evidence for safety assessors.

What does a Safety Package include?

Components of the Safety Package include:

A Safety Manual

This document provides:

  • The overview of the product
  • The specification of any fault detection and reporting mechanisms included with the IP
  • The Assumptions of Use
  • The results of the assessment activities
Safety analysis reports
  • As a minimum, the Safety Package includes a detailed Failure Mode, Effects, and Diagnostic Analysis (FMEDA) for the IP. The FMEDA provides a clear view of the failure modes for the different IP subblocks, their effects at the IP boundaries, and the coverage achieved by any safety mechanisms included with the IP.
  • In addition to the FMEDA a Dependent Failure Analysis (DFA) is provided as applicable. This document analyses the source of common cause failures in the IP and the mitigation that either Arm or the customer should implement to address identified common cause failures.
Development Interface Report (DIR)

Arm delivers a standardized agreement using the DIR with partners. The DIR clarifies the ISO 26262 activities that Arm takes responsibility for, and provides a full view of the standard activities, work products, and mapping. Arm provides this standardized DIR instead of a specific Development Interface Agreement (DIA) for distributed development in accordance with ISO 26262:2018.

What are the levels of Functional Safety support?

Arm defines three levels of functional safety support to our customers:

  1. Minimum level (Evaluation enablement product, ISO 26262 Part 8 Clause 13, or Route 3s IEC 61508 Part 3)
    • Limited to certain legacy IP
    • No Safety Package provided, only evaluation checklist (Table 31 ISO 26262 Part 11 and supporting processes) on request
    • Aid the evaluation of the IP for the avoidance of systematic failures only
  2. Standard level (Evaluation enablement product, ISO 26262 Part 8 Clause 13, or Route 3s IEC 61508 Part 3)
    • Applicable to some IP developed before 2018, see the Arm IP with Safety Packages table
    • Safety Package is provided with all its components
    • No independent assessment or certification is provided
  3. Extended level (SEooC with safety claims)
    • Applicable to most and all future Automotive Enhanced products, see the Arm IP with Safety Packages table
    • Safety Package is provided with all its components
    • ASIL and SIL claims on the avoidance of systematic faults and hardware metrics depending on the product
    • Independently assessed and certified by a third-party assessor

Arm Software Test Libraries

Arm Software Test Libraries (STL) complement Arm functional safety technology. STLs are efficient assembly language routines that detect presence of permanent faults within a specific Arm processor. They are executed by the processor enabling self-testing of the IP at start-up and during application run time.

STLs are called through a C language Application Programmer Interface (API) enabling developers to quickly and easily schedule execution of the required tests. The STLs have been developed with a systematic development process aligned to ISO26262 ASIL D and IEC61508 SIL3. The STLs can be used to make a valuable contribution to Single Point Fault metrics, particularly in systems with ASIL B requirements.

Arm IP with Safety Packages

 

  Processor Available in Arm Flexible Access  Safety Documentation Package
 Software Test Library Support
Supported
 Level 
 
Cortex-A		 Cortex-A76AE No
 Yes
 Extended
 No
Cortex-A76
No  Yes
 Extended
 No
Cortex-A75
 No
 Yes
 Standard No
Cortex-A72
 No
 Yes
 Standard
 No
Cortex-A65AE
 No
 Yes
 Extended No
Cortex-A65
 No
 Yes
 Extended
 No
Cortex-A57
 Yes
 Yes
 Standard No 
Cortex-A55
 No
 Yes
 Extended
 No
Cortex-A53
 Yes
 Yes
 Standard
 Yes
Cortex-A35
 Yes  Yes
 Standard
 No
Cortex-A34
 Yes
 Yes
 Standard
 No
Cortex-A32
 Yes
 Yes
 Standard
 No
Cortex-A7
 Yes
 No
 -
 No
Cortex-A5
 Yes
 No
 -
 No
Cortex-R
 Cortex-R52
 Yes
 Yes
 Extended
 Yes
Cortex-R8
 Yes  No
 -
 No
Cortex-R7
 Yes
 No
 -
 No 
Cortex-R5
 Yes
 Yes
 Extended
 No
Cortex-R4
 Yes
 No
 -
 No
Cortex-M
 Cortex-M35P No
 No
 -
 No
Cortex-M33 Yes
 Yes
 Extended
 No 
Cortex-M23 Yes  Yes  Extended
 No
Cortex-M7 Yes Yes
 Standard
 No
Cortex-M4 Yes  Yes
 Standard  Yes
Cortex-M3 Yes
 Yes
 Standard
 Yes
Cortex-M1 Yes
 No
 -
 No
Cortex-M0+ Yes
 Yes
 Standard
 Yes
Cortex-M0 Yes
 No
 Standard
 No
ISP
 Mali-C71
 No
No
-
No
System
 GIC-600AE
 No
 Yes
 Extended
 No
MMU-600AE
 No
 Yes
 Extended
 No 
CMN-600AE
 No  Yes
 Extended
 No
GPU
 Mali-G76
 No
 No
 -
 No
Mali-G52
 Yes
 No
 -
 No