diff --git a/docs/plat/allwinner.rst b/docs/plat/allwinner.rst index a10e6dc9655acf54dcfa4464d3450b9d86e55e0e..825fded48eb68c61c79ec570ec6bca48f9ef58b2 100644 --- a/docs/plat/allwinner.rst +++ b/docs/plat/allwinner.rst @@ -4,9 +4,11 @@ Trusted Firmware-A for Allwinner ARMv8 SoCs Trusted Firmware-A (TF-A) implements the EL3 firmware layer for Allwinner SoCs with ARMv8 cores. Only BL31 is used to provide proper EL3 setup and PSCI runtime services. + U-Boot's SPL acts as a loader, loading both BL31 and BL33 (typically U-Boot). Loading is done from SD card, eMMC or SPI flash, also via an USB debug interface (FEL). + BL31 lives in SRAM A2, which is documented to be accessible from secure world only.