4. Amlogic Meson S905X2 (G12A)¶
The Amlogic Meson S905X2 is a SoC with a quad core Arm Cortex-A53 running at ~1.8GHz. It also contains a Cortex-M3 used as SCP.
This port is a minimal implementation of BL31 capable of booting mainline U-Boot and Linux:
Basic PSCI support (CPU_ON, CPU_OFF, SYSTEM_RESET, SYSTEM_OFF). Note that CPU0 can’t be turned off, so there is a workaround to hide this from the caller.
GICv2 driver set up.
Basic SIP services (read efuse data, enable/disable JTAG).
In order to build it:
CROSS_COMPILE=aarch64-linux-gnu- make DEBUG=1 PLAT=g12a
This port has been tested on a SEI510 board. After building it, follow the instructions in the gxlimg repository or U-Boot repository, replacing the mentioned bl31.img by the one built from this port.