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diff --git a/docs/plat/rockchip.rst b/docs/plat/rockchip.rst new file mode 100644 index 0000000..b7c43fb --- /dev/null +++ b/docs/plat/rockchip.rst @@ -0,0 +1,55 @@ +Rockchip SoCs +============= + +Trusted Firmware-A supports a number of Rockchip ARM SoCs from both +AARCH32 and AARCH64 fields. + +This includes right now: +- px30: Quad-Core Cortex-A53 +- rk3288: Quad-Core Cortex-A17 (past A12) +- rk3328: Quad-Core Cortex-A53 +- rk3368: Octa-Core Cortex-A53 +- rk3399: Hexa-Core Cortex-A53/A72 + + +Boot Sequence +------------- + +For AARCH32: + Bootrom --> BL1/BL2 --> BL32 --> BL33 --> Linux kernel + +For AARCH64: + Bootrom --> BL1/BL2 --> BL31 --> BL33 --> Linux kernel + +BL1/2 and BL33 can currently be supplied from either: +- Coreboot + Depthcharge +- U-Boot - either separately as TPL+SPL or only SPL + + +How to build +------------ + +Rockchip SoCs expect TF-A's BL31 (AARCH64) or BL32 (AARCH32) to get +integrated with other boot software like U-Boot or Coreboot, so only +these images need to get build from the TF-A repository. + +For AARCH64 architectures the build command looks like + + make CROSS_COMPILE=aarch64-linux-gnu- PLAT=rk3399 bl32 + +while AARCH32 needs a slightly different command + + make ARCH=aarch32 CROSS_COMPILE=arm-linux-gnueabihf- PLAT=rk3288 AARCH32_SP=sp_min bl32 + +Both need replacing the PLAT argument with the platform from above you +want to build for and the CROSS_COMPILE argument with you cross- +compilation toolchain. + + +How to deploy +------------- + +Both upstream U-Boot and Coreboot projects contain instructions on where +to put the built images during their respective build process. +So after successfully building TF-A just follow their build instructions +to continue. |