Implementation of "secure world software"
ARM Trusted Firmware provides a reference implementation of secure world software for ARMv7A and ARMv8-A, including a Secure Monitor executing at Exception Level 3 (EL3). It implements various ARM interface standards, such as:
The Power State Coordination Interface (PSCI)
Trusted Board Boot Requirements (TBBR, ARM DEN0006C-1)
SMC Calling Convention
System Control and Management Interface
Software Delegated Exception Interface (SDEI)
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