Here is the step-by-step to boot U-Boot on rv1108 evb.
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Compile U-Boot
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===========================
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> make CROSS_COMPILE=arm-linux-gnueabihf- evb-rv1108_defconfig all
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> ./tools/mkimage -n rv1108 -T rksd -d ./out/u-boot-spl.bin spl.bin
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You can also use the ddr bin from rockchip official release [0] instead of u-boot-spl:
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> ./tools/mkimage -n rv1108 -T rksd -d ../rkbin/rv1x/rv1108ddr_v1.00.bin spl.bin
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> cat spl.bin u-boot.bin > u-boot.img
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Flash the image by rkdeveloptool
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================================
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rkdeveloptool can get from https://github.com/rockchip-linux/rkdeveloptool.git
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Power on(or reset with RESET KEY) with MASKROM KEY preesed, and then:
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> rkdeveloptool db ./rkbin/rv1x/rv1108usbboot_v1.00.bin
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> rkdeveloptool wl 0x40 u-boot.img
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> rkdeveloptool RD
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You should be able to get U-Boot log message from boot console with baudrate 1500000:
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U-Boot SPL board initReturning to boot ROM...
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U-Boot 2017.09-01119-gc3ef4c0-dirty (Feb 06 2018 - 10:04:12 +0800)
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Model: Rockchip RV1108 Evaluation board
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DRAM: 256 MiB
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APLL: 400000000 DPLL:798000000 GPLL:384000000
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MMC:
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Using default environment
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In: serial@10210000
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Out: serial@10210000
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Err: serial@10210000
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Model: Rockchip RV1108 Evaluation board
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Net: No ethernet found.
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Hit any key to stop autoboot: 0
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=>
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[0] git clone https://github.com/rockchip-linux/rkbin.git
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