1*54fd6939SJiyong ParkAmlogic Meson S905 (GXBB) 2*54fd6939SJiyong Park========================= 3*54fd6939SJiyong Park 4*54fd6939SJiyong ParkThe Amlogic Meson S905 is a SoC with a quad core Arm Cortex-A53 running at 5*54fd6939SJiyong Park1.5Ghz. It also contains a Cortex-M3 used as SCP. 6*54fd6939SJiyong Park 7*54fd6939SJiyong ParkThis port is a minimal implementation of BL31 capable of booting mainline U-Boot 8*54fd6939SJiyong Parkand Linux: 9*54fd6939SJiyong Park 10*54fd6939SJiyong Park- SCPI support. 11*54fd6939SJiyong Park- Basic PSCI support (CPU_ON, CPU_OFF, SYSTEM_RESET, SYSTEM_OFF). Note that CPU0 12*54fd6939SJiyong Park can't be turned off, so there is a workaround to hide this from the caller. 13*54fd6939SJiyong Park- GICv2 driver set up. 14*54fd6939SJiyong Park- Basic SIP services (read efuse data, enable/disable JTAG). 15*54fd6939SJiyong Park 16*54fd6939SJiyong ParkIn order to build it: 17*54fd6939SJiyong Park 18*54fd6939SJiyong Park.. code:: shell 19*54fd6939SJiyong Park 20*54fd6939SJiyong Park CROSS_COMPILE=aarch64-linux-gnu- make DEBUG=1 PLAT=gxbb bl31 21*54fd6939SJiyong Park 22*54fd6939SJiyong ParkThis port has been tested in a ODROID-C2. After building it, follow the 23*54fd6939SJiyong Parkinstructions in the `U-Boot repository`_, replacing the mentioned **bl31.bin** 24*54fd6939SJiyong Parkby the one built from this port. 25*54fd6939SJiyong Park 26*54fd6939SJiyong Park.. _U-Boot repository: https://gitlab.denx.de/u-boot/u-boot/-/blob/master/board/amlogic/p200/README.odroid-c2 27