35. Xilinx Zynq UltraScale+ MPSoC¶
Trusted Firmware-A (TF-A) implements the EL3 firmware layer for Xilinx Zynq UltraScale + MPSoC. The platform only uses the runtime part of TF-A as ZynqMP already has a BootROM (BL1) and FSBL (BL2).
BL31 is TF-A. BL32 is an optional Secure Payload. BL33 is the non-secure world software (U-Boot, Linux etc).
make CROSS_COMPILE=aarch64-none-elf- PLAT=zynqmp bl31
To build bl32 TSP you have to rebuild bl31 too:
make CROSS_COMPILE=aarch64-none-elf- PLAT=zynqmp SPD=tspd bl31 bl32
To build TF-A for JTAG DCC console:
make CROSS_COMPILE=aarch64-none-elf- PLAT=zynqmp RESET_TO_BL31=1 bl31 ZYNQMP_CONSOLE=dcc
35.1. ZynqMP platform specific build options¶
ZYNQMP_ATF_MEM_BASE: Specifies the base address of the bl31 binary.
ZYNQMP_ATF_MEM_SIZE: Specifies the size of the memory region of the bl31 binary.
ZYNQMP_BL32_MEM_BASE: Specifies the base address of the bl32 binary.
ZYNQMP_BL32_MEM_SIZE: Specifies the size of the memory region of the bl32 binary.
ZYNQMP_CONSOLE: Select the console driver. Options:
cadence0: Cadence UART 0
cadence1: Cadence UART 1
35.2. FSBL->TF-A Parameter Passing¶
The FSBL populates a data structure with image information for TF-A. TF-A uses
that data to hand off to the loaded images. The address of the handoff data
structure is passed in the
PMU_GLOBAL.GLOBAL_GEN_STORAGE6 register. The
register is free to be used by other software once TF-A has brought up
further firmware images.
35.3. Power Domain Tree¶
The following power domain tree represents the power domain model used by TF-A for ZynqMP:
+-+ |0| +-+ +-------+---+---+-------+ | | | | | | | | v v v v +-+ +-+ +-+ +-+ |0| |1| |2| |3| +-+ +-+ +-+ +-+
The 4 leaf power domains represent the individual A53 cores, while resources common to the cluster are grouped in the power domain on the top.