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+Introduction
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+============
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+
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+RK3328 key features we might use in U-Boot:
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+* CPU: ARMv8 64bit quad-core Cortex-A53
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+* IRAM: 36KB
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+* DRAM: 4GB-16MB 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: USB2.0 EHCI host port *2
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+* Display: RGB/HDMI/DP/MIPI/EDP
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+
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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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+
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+In order to support Arm Trust Firmware(ATF), we need to use the
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+miniloader from rockchip which:
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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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+
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+Here is the step-by-step to boot to U-Boot on rk3328.
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+
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+Get the Source and prebuild binary
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+==================================
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+
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+ > mkdir ~/evb_rk3328
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+ > cd ~/evb_rk3328
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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
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+ > git clone https://github.com/rockchip-linux/rkflashtool
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+
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+Compile ATF
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+===============
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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=rk3328 bl31
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+
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+Compile U-Boot
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+==================
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+
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+ > cd ../u-boot
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+ > make CROSS_COMPILE=aarch64-linux-gnu- evb-rk3328_defconfig all
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+
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+Compile rkflashtool
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+=======================
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+
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+ > cd ../rkflashtool
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+ > make
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+
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+Package image for miniloader
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+================================
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+ > cd ..
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+ > cp arm-trusted-firmware/build/rk3328/release/bl31.bin rkbin/rk33
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+ > ./rkbin/tools/trust_merger rkbin/tools/RK3328TRUST.ini
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+ > ./rkbin/tools/loaderimage --pack --uboot u-boot/u-boot-dtb.bin uboot.img
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+ > mkdir image
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+ > mv trust.img ./image/
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+ > mv uboot.img ./image/rk3328evb-uboot.bin
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+
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+Flash image
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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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+
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+ > ./rkflashtool/rkflashloader rk3328evb
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+
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+You should be able to get U-Boot log message in console/UART2 now.
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