U-boot communicates directly with PMU firmware via ATF for bitstream downloading. For authentication and/or encryption of secure bitstream, XilFPGA uses XilSecure library services. With help of XilFPGA library, PMU firmware perform bitstream programming to PL. ARM Trusted Firmware uses IPI messaging service to request PMU firmware to perform bitstream load. With help of Xilinx FPGA driver FPGA Manager sends the bitstream to PMU firmware running on PMU securely via ARM Trusted Firmware(ATF). Linux application sends the secure bitstream to Linux FPGA Manager framework to program the PL. Unsupported features for loading the secure bitstream from Linux are: Encrypted only Bitstream full/partial loading with the device key.Authenticated and Encrypted full/partial bitstream loading.Authenticated full/partial bitstream loading.Encrypted full/partial bitstream loading with the user key.Supported features for loading the secure bitstream from Linux are: This page provides the details about programming the secure bitstream from Linux using FPGA manager.

The ZynqMp Programmable Logic (PL) can be programmed either using First Stage Boot-loader (FSBL), U-Boot or through Linux.

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