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diff --git a/docs/plat/qemu-sbsa.rst b/docs/plat/qemu-sbsa.rst new file mode 100644 index 0000000..bc82ae5 --- /dev/null +++ b/docs/plat/qemu-sbsa.rst @@ -0,0 +1,56 @@ +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 + +To build TF-A: + +:: + + git clone https://git.trustedfirmware.org/TF-A/trusted-firmware-a.git tfa + cd tfa + export CROSS_COMPILE=aarch64-none-elf- + make PLAT=qemu_sbsa all fip + +To build TF-A with BL32 and SPM enabled(StandaloneMM as a Secure Payload): + +:: + + git clone https://git.trustedfirmware.org/TF-A/trusted-firmware-a.git tfa + cd tfa + export CROSS_COMPILE=aarch64-none-elf- + make PLAT=qemu_sbsa BL32=../STANDALONE_MM.fd SPM_MM=1 EL3_EXCEPTION_HANDLING=1 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 + |