76 lines
2.1 KiB
Plaintext
76 lines
2.1 KiB
Plaintext
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SiFive HiFive Unleashed
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=======================
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This file describes how to use the pre-defined Buildroot
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configuration for the SiFive HiFive Unleashed board.
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Further information about the HiFive Unleashed board can be found
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at https://www.sifive.com/boards/hifive-unleashed
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Building
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========
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Configure Buildroot using the default board configuration:
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$ make hifive_unleashed_defconfig
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Customise the build as necessary:
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$ make menuconfig
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Start the build:
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$ make
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Result of the build
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===================
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Once the build has finished you will have the following files:
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output/images/
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+-- fw_jump.bin
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+-- fw_jump.elf
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+-- fw_payload.bin
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+-- fw_payload.elf
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+-- Image
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+-- rootfs.ext2
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+-- rootfs.ext4
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+-- rootfs.tar
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+-- sdcard.img
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Creating a bootable SD card with genimage
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=========================================
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Buildroot builds a SD card image for you. All you need to do is dd the
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image to your SD card, which can be done with the following command:
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$ sudo dd if=output/images/sdcard.img of=/dev/mmcblk0 bs=4096
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Booting the SD card on the board
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================================
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Make sure that the all DIP switches are set to the off position for
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default boot mode (MSEL mode = 1111), insert the SD card and power
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up the board.
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Connect the USB cable and open minicom (/dev/ttyUSB1, 115200, 8N1).
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See the 'SiFive HiFive Unleashed Getting Started Guide' for
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more details (https://www.sifive.com/documentation).
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You will get a warning reported by fdisk when you examine the SD card.
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This is because the genimage.cfg file doesn't specify the SD card size
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(as people will naturally have different sized cards), so the
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secondary GPT header is placed after the rootfs rather than at the end
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of the disk where it is expected to be.
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You will see something like this at boot time:
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[ 2.318722] GPT:Primary header thinks Alt. header is not at the end of the disk.
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[ 2.325390] GPT:190496 != 122142719
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[ 2.328843] GPT:Alternate GPT header not at the end of the disk.
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[ 2.334824] GPT:190496 != 122142719
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[ 2.338302] GPT: Use GNU Parted to correct GPT errors.
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[ 2.343456] mmcblk0: p1 p2
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