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configs/hifive_unmatched: new board

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This patch adds support for the HiFive Unmatched board. This includes
building the firmware, kernel and rootFS for the HiFive Unmatched.

The configuration is similar to the one for the HiFive Unleashed, this
is why most of it is shared in board/sifive/common.

Signed-off-by: Francois Dugast <francois.dugast.foss@gmail.com>
[Julien:
 - add missing BR2_TARGET_UBOOT_NEEDS_GNUTLS=y
 - change linux.hash comment to take hash from upstream
 - change linux-headers.hash file to a symlink
]
Signed-off-by: Julien Olivain <ju.o@free.fr>
This commit is contained in:
Francois Dugast
2025-03-28 20:57:40 +01:00
committed by Julien Olivain
parent ec8120af81
commit f9cc5dbd45
6 changed files with 156 additions and 0 deletions
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4
board/sifive/hifive-unmatched/boot.cmd Normal file
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setenv bootargs earlycon=sbi root=/dev/mmcblk0p3 rootwait
load mmc 0:3 ${kernel_addr_r} boot/Image
load mmc 0:3 ${fdt_addr_r} boot/hifive-unmatched-a00.dtb
booti ${kernel_addr_r} - ${fdt_addr_r}

1
board/sifive/hifive-unmatched/patches/linux-headers/linux-headers.hash Symbolic link
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../linux/linux.hash

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board/sifive/hifive-unmatched/patches/linux/linux.hash Normal file
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# From https://www.kernel.org/pub/linux/kernel/v6.x/sha256sums.asc
sha256 230e89b07b0ab82e74f07ecc1bee3105dca81d0ef4a97f900929c407249b6ac7 linux-6.12.20.tar.xz

2
board/sifive/hifive-unmatched/patches/opensbi/opensbi.hash Normal file
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# Locally calculated
sha256 8fcbce598a73acc2c7f7d5607d46b9d5107d3ecbede8f68f42631dcfc25ef2b2 opensbi-1.2.tar.gz

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board/sifive/hifive-unmatched/readme.txt Normal file
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SiFive HiFive Unmatched
=======================
This file describes how to use the pre-defined Buildroot
configuration for the SiFive HiFive Unmatched board.
Further information about the HiFive Unmatched board can be found
at https://www.sifive.com/boards/hifive-unmatched
Building
========
Configure Buildroot using the default board configuration:
$ make hifive_unmatched_defconfig
Customise the build as necessary:
$ make menuconfig
Start the build:
$ make
Result of the build
===================
Once the build has finished you will have the following files:
output/images/
+-- boot.scr
+-- fw_dynamic.bin
+-- fw_dynamic.elf
+-- fw_jump.bin
+-- fw_jump.elf
+-- hifive-unmatched-a00.dtb
+-- Image
+-- rootfs.cpio
+-- rootfs.ext2
+-- rootfs.ext4
+-- rootfs.tar
+-- sdcard.img
+-- u-boot.bin
+-- u-boot.itb
+-- u-boot-spl.bin
Creating a bootable SD card with genimage
=========================================
By default Buildroot builds a SD card image for you. All you need to do
is dd the image to your SD card, which can be done with the following
command on your development host:
$ sudo dd if=output/images/sdcard.img of=/dev/sdb bs=4096
The above example command assumes the SD card is accessed via a USB card
reader and shows up as /dev/sdb on the host. Adjust it accordingly per
your actual setup.
Booting the SD card on the board
================================
Make sure that the all DIP switches are set to the off position for
default boot mode (MSEL mode = 1011), insert the SD card and power
up the board.
Connect the USB cable and open minicom (/dev/ttyUSB1, 115200, 8N1).
See the 'SiFive HiFive Unmatched Getting Started Guide' for
more details (https://www.sifive.com/documentation).
You will get a warning reported by fdisk when you examine the SD card.
This is because the genimage_sdcard.cfg file doesn't specify the SD card
size (as people will naturally have different sized cards), so the
secondary GPT header is placed after the rootfs rather than at the end
of the disk where it is expected to be.
You will see something like this at boot time:
[ 0.989458] mmc0: host does not support reading read-only switch, assuming write-enable
[ 0.996772] mmc0: new SDHC card on SPI
[ 1.001634] mmcblk0: mmc0:0000 SD8GB 7.28 GiB
[ 1.038079] GPT:Primary header thinks Alt. header is not at the end of the disk.
[ 1.044759] GPT:52389 != 15264767
[ 1.048051] GPT:Alternate GPT header not at the end of the disk.
[ 1.054015] GPT:52389 != 15264767
[ 1.057323] GPT: Use GNU Parted to correct GPT errors.
[ 1.062479] mmcblk0: p1 p2 p3
Testing under QEMU
==================
The SD card image can be tested using QEMU:
$ qemu-system-riscv64 -M sifive_u,msel=11 -smp 5 -m 8G \
-display none -serial stdio -nic user \
-bios output/images/u-boot-spl.bin \
-drive file=output/images/sdcard.img,if=sd

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configs/hifive_unmatched_defconfig Normal file
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BR2_riscv=y
BR2_riscv_custom=y
BR2_RISCV_ISA_RVM=y
BR2_RISCV_ISA_RVA=y
BR2_RISCV_ISA_RVF=y
BR2_RISCV_ISA_RVD=y
BR2_RISCV_ISA_RVC=y
BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_6_12=y
BR2_GLOBAL_PATCH_DIR="board/sifive/hifive-unmatched/patches"
BR2_DOWNLOAD_FORCE_CHECK_HASHES=y
BR2_TARGET_GENERIC_GETTY_PORT="ttySIF0"
BR2_SYSTEM_DHCP="eth0"
BR2_ROOTFS_POST_BUILD_SCRIPT="board/sifive/common/post-build.sh"
BR2_ROOTFS_POST_IMAGE_SCRIPT="support/scripts/genimage.sh"
BR2_ROOTFS_POST_SCRIPT_ARGS="-c board/sifive/common/genimage_sdcard.cfg"
BR2_LINUX_KERNEL=y
BR2_LINUX_KERNEL_CUSTOM_VERSION=y
BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="6.12.20"
BR2_LINUX_KERNEL_USE_ARCH_DEFAULT_CONFIG=y
BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES="board/sifive/common/linux.config.fragment"
BR2_LINUX_KERNEL_DTS_SUPPORT=y
BR2_LINUX_KERNEL_INTREE_DTS_NAME="sifive/hifive-unmatched-a00"
BR2_LINUX_KERNEL_INSTALL_TARGET=y
BR2_TARGET_ROOTFS_CPIO=y
BR2_TARGET_ROOTFS_EXT2=y
BR2_TARGET_ROOTFS_EXT2_4=y
BR2_TARGET_OPENSBI=y
BR2_TARGET_OPENSBI_CUSTOM_VERSION=y
BR2_TARGET_OPENSBI_CUSTOM_VERSION_VALUE="1.2"
BR2_TARGET_OPENSBI_PLAT="generic"
BR2_TARGET_UBOOT=y
BR2_TARGET_UBOOT_BUILD_SYSTEM_KCONFIG=y
BR2_TARGET_UBOOT_CUSTOM_VERSION=y
BR2_TARGET_UBOOT_CUSTOM_VERSION_VALUE="2025.01"
BR2_TARGET_UBOOT_BOARD_DEFCONFIG="sifive_unmatched"
BR2_TARGET_UBOOT_NEEDS_DTC=y
BR2_TARGET_UBOOT_NEEDS_PYLIBFDT=y
BR2_TARGET_UBOOT_NEEDS_OPENSSL=y
BR2_TARGET_UBOOT_NEEDS_GNUTLS=y
BR2_TARGET_UBOOT_NEEDS_OPENSBI=y
BR2_TARGET_UBOOT_FORMAT_CUSTOM=y
BR2_TARGET_UBOOT_FORMAT_CUSTOM_NAME="u-boot.itb"
BR2_TARGET_UBOOT_SPL=y
BR2_PACKAGE_HOST_GENIMAGE=y
BR2_PACKAGE_HOST_UBOOT_TOOLS=y
BR2_PACKAGE_HOST_UBOOT_TOOLS_BOOT_SCRIPT=y
BR2_PACKAGE_HOST_UBOOT_TOOLS_BOOT_SCRIPT_SOURCE="board/sifive/hifive-unmatched/boot.cmd"