docs/plat/qemu-sbsa.rst

   1 QEMU SBSA Target
   2 ================
   3
   4 Trusted Firmware-A (TF-A) implements the EL3 firmware layer for QEMU SBSA
   5 Armv8-A. While running Qemu from command line, we need to supply two Flash
   6 images. First Secure BootRom is supplied by -pflash argument. This Flash image
   7 is made by EDK2 build system by composing BL1 and FIP. Second parameter for Qemu
   8 is responsible for Non-secure rom which also given with -pflash argument and
   9 contains of UEFI and EFI variables (also made by EDK2 build system). Semihosting
  10 is not used
  11
  12 When QEMU starts all CPUs are released simultaneously, BL1 selects a
  13 primary CPU to handle the boot and the secondaries are placed in a polling
  14 loop to be released by normal world via PSCI.
  15
  16 BL2 edits the FDT, generated by QEMU at run-time to add a node describing PSCI
  17 and also enable methods for the CPUs.
  18
  19 Current limitations:
  20
  21 -  Only cold boot is supported
  22 -  No instructions for how to load a BL32 (Secure Payload)
  23
  24 To build TF-A:
  25
  26 ::
  27
  28     git clone https://git.trustedfirmware.org/TF-A/trusted-firmware-a.git tfa
  29     cd tfa
  30     export CROSS_COMPILE=aarch64-linux-gnu-
  31     make PLAT=qemu_sbsa all fip
  32
  33 Images will be placed at build/qemu_sbsa/release (bl1.bin and fip.bin).
  34 Need to copy them into top directory for EDK2 compilation.
  35
  36 ::
  37
  38     cp build/qemu_sbsa/release/bl1.bin ../
  39     cp build/qemu_sbsa/release/fip.bin ../
  40
  41 Those images cannot be used by itself (no semihosing support). Flash images are built by
  42 EDK2 build system, refer to edk2-platform repo for full build instructions.
  43
  44 ::
  45
  46     git clone https://github.com/tianocore/edk2-platforms.git
  47     Platform/Qemu/SbsaQemu/Readme.md
  48