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Introduction
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============
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RK3399 key features we might use in U-Boot:
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* CPU: ARMv8 64bit Big-Little architecture,
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* Big: dual-core Cortex-A72
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* Little: quad-core Cortex-A53
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* IRAM: 200KB
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* DRAM: 4GB-128MB dual-channel
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* eMMC: support eMMC 5.0/5.1, suport HS400, HS200, DDR50
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* SD/MMC: support SD 3.0, MMC 4.51
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* USB: USB3.0 typc-C port *2 with dwc3 controller
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* USB2.0 EHCI host port *2
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* Display: RGB/HDMI/DP/MIPI/EDP
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evb key features:
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* regulator: pwm regulator for CPU B/L
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* PMIC: rk808
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* debug console: UART2
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In order to support Arm Trust Firmware(ATF), we can use either SPL or
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miniloader from rockchip to do:
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* do DRAM init
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* load and verify ATF image
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* load and verify U-Boot image
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Here is the step-by-step to boot to U-Boot on rk3399.
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Get the Source and prebuild binary
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==================================
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> mkdir ~/evb_rk3399
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> cd ~/evb_rk3399
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> git clone https://github.com/ARM-software/arm-trusted-firmware.git
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> git clone https://github.com/rockchip-linux/rkbin.git
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> git clone https://github.com/rockchip-linux/rkdeveloptool.git
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Compile the ATF
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===============
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> cd arm-trusted-firmware
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> make realclean
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> make CROSS_COMPILE=aarch64-linux-gnu- PLAT=rk3399 bl31
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Or you can get the bl31.elf directly from Rockchip:
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cp rkbin/rk33/rk3399_bl31_v1.00.elf ../u-boot/bl31.elf
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Get bl31.elf in this step, copy it to U-Boot root dir:
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> cp bl31.elf ../u-boot/
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Compile the U-Boot
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==================
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> cd ../u-boot
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> export ARCH=arm64
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> export CROSS_COMPILE=aarch64-linux-gnu-
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> make evb-rk3399_defconfig
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for firefly-rk3399, use below instead:
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> make firefly-rk3399_defconfig
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> make
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> make u-boot.itb
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Get spl/u-boot-spl.bin and u-boot.itb in this step.
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Compile the rkdeveloptool
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=======================
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Follow instructions in latest README
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> cd ../rkflashtool
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> autoreconf -i
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> ./configure
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> make
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> sudo make install
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Get rkdeveloptool in you Host in this step.
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Both origin binaries and Tool are ready now, choose either option 1 or
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option 2 to deploy U-Boot.
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Package the image
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=================
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Package the image for U-Boot SPL(option 1)
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--------------------------------
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> cd ..
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> tools/mkimage -n rk3399 -T rksd -d spl/u-boot-spl.bin idbspl.img
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Get idbspl.img in this step.
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Package the image for Rockchip miniloader(option 2)
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------------------------------------------
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> cd ..
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> cp arm-trusted-firmware/build/rk3399/release/bl31.elf rkbin/rk33
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> ./rkbin/tools/trust_merger rkbin/tools/RK3399TRUST.ini
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> ./rkbin/tools/loaderimage --pack --uboot u-boot/u-boot-dtb.bin uboot.img
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Get trust.img and uboot.img in this step.
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Flash the image to eMMC
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=======================
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Flash the image with U-Boot SPL(option 1)
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-------------------------------
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Power on(or reset with RESET KEY) with MASKROM KEY preesed, and then:
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> rkdeveloptool db rkbin/rk33/rk3399_loader_v1.08.106.bin
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> rkdeveloptool wl 64 u-boot/idbspl.img
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> rkdeveloptool wl 0x4000 u-boot/u-boot.itb
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> rkdeveloptool rd
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Flash the image with Rockchip miniloader(option 2)
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----------------------------------------
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Power on(or reset with RESET KEY) with MASKROM KEY preesed, and then:
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> rkdeveloptool db rkbin/rk33/rk3399_loader_v1.08.106.bin
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> rkdeveloptool ul rkbin/rk33/rk3399_loader_v1.08.106.bin
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> rkdeveloptool wl 0x4000 u-boot/uboot.img
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> rkdeveloptool wl 0x6000 u-boot/trust.img
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> rkdeveloptool rd
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You should be able to get U-Boot log in console/UART2(baurdrate 1500000)
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For more detail, please reference to:
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http://opensource.rock-chips.com/wiki_Boot_option
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