| QEMU SBSA Target |
| ================ |
| |
| Trusted Firmware-A (TF-A) implements the EL3 firmware layer for QEMU SBSA |
| Armv8-A. While running Qemu from command line, we need to supply two Flash |
| images. First Secure BootRom is supplied by -pflash argument. This Flash image |
| is made by EDK2 build system by composing BL1 and FIP. Second parameter for Qemu |
| is responsible for Non-secure rom which also given with -pflash argument and |
| contains of UEFI and EFI variables (also made by EDK2 build system). Semihosting |
| is not used |
| |
| When QEMU starts all CPUs are released simultaneously, BL1 selects a |
| primary CPU to handle the boot and the secondaries are placed in a polling |
| loop to be released by normal world via PSCI. |
| |
| BL2 edits the FDT, generated by QEMU at run-time to add a node describing PSCI |
| and also enable methods for the CPUs. |
| |
| Current limitations: |
| |
| - Only cold boot is supported |
| - No instructions for how to load a BL32 (Secure Payload) |
| |
| To build TF-A: |
| |
| :: |
| |
| git clone https://git.trustedfirmware.org/TF-A/trusted-firmware-a.git tfa |
| cd tfa |
| export CROSS_COMPILE=aarch64-linux-gnu- |
| make PLAT=qemu_sbsa all fip |
| |
| Images will be placed at build/qemu_sbsa/release (bl1.bin and fip.bin). |
| Need to copy them into top directory for EDK2 compilation. |
| |
| :: |
| |
| cp build/qemu_sbsa/release/bl1.bin ../ |
| cp build/qemu_sbsa/release/fip.bin ../ |
| |
| Those images cannot be used by itself (no semihosing support). Flash images are built by |
| EDK2 build system, refer to edk2-platform repo for full build instructions. |
| |
| :: |
| |
| git clone https://github.com/tianocore/edk2-platforms.git |
| Platform/Qemu/SbsaQemu/Readme.md |
| |