OP-TEE on Texas Instruments SoCs
The instructions here will tell how to run OP-TEE on Texas Instruments devices. Secure TI devices require a boot image that is authenticated by ROM code to function. Without this, even JTAG remains locked. In order to create a valid boot image for a secure device from TI, the initial public software image must be signed and combined with various headers, certificates, and other binary images.
Information on the details on the complete boot image format can be obtained from Texas Instruments. The tools used to generate boot images for secure devices are part of a secure development package (SECDEV) that can be downloaded from:
https://myportal.ti.com (login required)
The secure development package is access controlled due to NDA and export control restrictions. Access must be requested and granted by TI before the package is viewable and downloadable. Contact TI, either online or by way of a local TI representative, to request access.
2. Regular build
Start out by following the “Get and build the solution” in the README.md file. Stop before the section on flashing the device, this is currently not supported automatically.
3. Booting the device
3.1 SD Card boot
Create two partitions on an SD card, ‘boot’ of type FAT16 and ‘rootfs’ of type EXT4. To prevent accidental data loss we do not attempt this automatically, the RPI3 instructions use a similar SD card layout, you can refer to that page for details.
Extract the generated rootfs to the ‘rootfs’ partition
# cd <SD card rootfs partition> # gunzip -cd <repo directory>/gen_rootfs/filesystem.cpio.gz | sudo cpio -idm
Add the bootloader to the ‘boot’ partition
# cd <SD card boot partition> # cp <repo directory>/u-boot/u-boot-spl_HS_MLO MLO # cp <repo directory>/u-boot/u-boot_HS.img u-boot.img