![]() Boot Loader stage 3-2 (B元2) Secure-EL1 Payload (optional).Boot Loader stage 3-1 (B元1) E元 Runtime Software.Boot Loader stage 2 (BL2) Trusted Boot Firmware.Boot Loader stage 1 (BL1) AP Trusted ROM.The components part of the ATF are BL1, BL2 and B元1.Ī typical system will consist of five components: The source files for ATF are available in github ![]() My understanding is that ARM has developed software to standardize interactions between the non-secure and the secure world and made it open source. “ARM Trusted Firmware is a Reference implementation of secure world software for ARMv8-A, including Exception Level 3 (E元) software.” Here I will describe the ATF for the ARM v8-A profile. ![]() I wanted to understand this technology and more importantly OP-TEE, an OS running in the trusted zone specifically designed to provide secure services.īut before that, we need to understand the ARM trusted firmware (ATF). For many of us working in the embedded world with ARM devices, it is not uncommon to have come across the company’s marketing terms on security - “TrustZone”, “Trusted Execution Environment”, “Trusted World”. ![]()
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