ARM has announced a Platform Security Architecture.
As well, they’ve announced the ARM CryptoIsland family of TrustZone family.
And they’ve announced the ARM CoreSight SDC-600 Secure Debug Channel, which provides a dedicated path to a debugged system for authenticating debug accesses.
https://www.arm.com/news/2017/10/a-common-industry-framework
https://developer.arm.com/products/architecture/platform-security-architecture
https://developer.arm.com/products/system-ip/trustzone-security-ip/cryptoisland-family