31. Texas Instruments K3

Trusted Firmware-A (TF-A) implements the EL3 firmware layer for Texas Instruments K3 SoCs.

31.1. Boot Flow

R5(U-Boot) --> TF-A BL31 --> BL32(OP-TEE) --> TF-A BL31 --> BL33(U-Boot) --> Linux
                                                    \
                                                Optional direct to Linux boot
                                                        \
                                                        --> BL33(Linux)

Texas Instruments K3 SoCs contain an R5 processor used as the boot master, it loads the needed images for A53 startup, because of this we do not need BL1 or BL2 TF-A stages.

31.2. Build Instructions

https://github.com/ARM-software/arm-trusted-firmware.git

TF-A:

make CROSS_COMPILE=aarch64-linux-gnu- PLAT=k3 SPD=opteed all

OP-TEE:

make ARCH=arm CROSS_COMPILE64=aarch64-linux-gnu- PLATFORM=k3 CFG_ARM64_core=y all

R5 U-Boot:

make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- am65x_evm_r5_defconfig
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- SYSFW=<path to SYSFW>

A53 U-Boot:

make ARCH=arm CROSS_COMPILE=aarch64-linux-gnu- am65x_evm_a53_defconfig
make ARCH=arm CROSS_COMPILE=aarch64-linux-gnu- ATF=<path> TEE=<path>

31.3. Deploy Images

cp tiboot3.bin tispl.bin u-boot.img /sdcard/boot/