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tools: Add mkimage-rpi3 to build images for raspberry Pi 3
The package contains u-boot and the RPi firmware blobs. It expects a tar ball of the root filesystem (including kernel and dtbs) on stdin and produces a compressed tar ball on stdout with the files to copy to a FAT32 formatted SD card. Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>
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56
tools/mkimage-rpi3/Dockerfile
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56
tools/mkimage-rpi3/Dockerfile
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FROM linuxkit/alpine:b3f8da6c6f02440ee9c4c72bbf4dabdf500b1d8c as build
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RUN apk add \
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bc \
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dtc \
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curl \
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make \
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gcc \
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git \
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musl-dev \
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patch
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# Create small rootfs
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RUN mkdir -p /out/etc/apk && cp -r /etc/apk/* /out/etc/apk/
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RUN apk add --no-cache --initdb -p /out \
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alpine-baselayout \
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busybox \
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libarchive-tools \
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musl \
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tar
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RUN rm -rf /out/etc/apk /out/lib/apk /out/var/cache
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# u-boot compile. The patch is needed to handle larger kernels
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ENV UBOOT_COMMIT=v2017.09
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COPY u-boot.patch .
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RUN git clone https://github.com/u-boot/u-boot.git && \
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cd /u-boot && \
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git checkout $UBOOT_COMMIT
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WORKDIR /u-boot
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RUN patch -p 1 < /u-boot.patch && \
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make rpi_3_defconfig all && \
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mkdir -p /out/boot && \
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cp u-boot.bin /out/boot && \
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mkdir -p /out/bin && \
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cp tools/mkimage /out/bin
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# fetch the Raspberry Pi 3 firmware (latest master)
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ENV RPI_COMMIT=478d637c476e838ffcfa8535232ff0b86daf5918
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RUN mkdir -p /out/boot && \
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cd /out/boot && \
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curl -fsSLO https://github.com/raspberrypi/firmware/raw/$RPI_COMMIT/boot/bootcode.bin && \
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curl -fsSLO https://github.com/raspberrypi/firmware/raw/$RPI_COMMIT/boot/bootcode.bin && \
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curl -fsSLO https://github.com/raspberrypi/firmware/raw/$RPI_COMMIT/boot/fixup_cd.dat && \
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curl -fsSLO https://github.com/raspberrypi/firmware/raw/$RPI_COMMIT/boot/fixup.dat && \
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curl -fsSLO https://github.com/raspberrypi/firmware/raw/$RPI_COMMIT/boot/fixup_x.dat && \
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curl -fsSLO https://github.com/raspberrypi/firmware/raw/$RPI_COMMIT/boot/start_cd.elf && \
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curl -fsSLO https://github.com/raspberrypi/firmware/raw/$RPI_COMMIT/boot/start.elf && \
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curl -fsSLO https://github.com/raspberrypi/firmware/raw/$RPI_COMMIT/boot/start_x.elf
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FROM scratch
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ENTRYPOINT []
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CMD []
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WORKDIR /
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COPY --from=build /out/ /
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COPY config.txt boot.script /boot/
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COPY make-rpi3 /
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ENTRYPOINT [ "/make-rpi3" ]
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tools/mkimage-rpi3/boot.script
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tools/mkimage-rpi3/boot.script
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setenv bootargs "dwc_otg.lpm_enable=0 earlyprintk console=tty1 console=ttyS0,115200 root=/dev/ram0 rw"
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setenv dtbfile bcm2837-rpi-3-b.dtb
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setenv machid 0x00000c42
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saveenv
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fatload mmc 0:1 ${kernel_addr_r} kernel.uimg
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fatload mmc 0:1 ${fdt_addr_r} ${dtbfile}
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fatload mmc 0:1 ${ramdisk_addr_r} initrd.uimg
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bootm ${kernel_addr_r} ${ramdisk_addr_r} ${fdt_addr_r}
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tools/mkimage-rpi3/build.yml
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tools/mkimage-rpi3/build.yml
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image: mkimage-rpi3
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network: true
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arches:
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- arm64
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5
tools/mkimage-rpi3/config.txt
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tools/mkimage-rpi3/config.txt
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avoid_warnings=2
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# 64bit mode, serial and kernel
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arm_control=0x200
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enable_uart=1
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kernel=u-boot.bin
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29
tools/mkimage-rpi3/make-rpi3
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tools/mkimage-rpi3/make-rpi3
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#!/bin/sh
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set -e
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# input is a tarball on stdin with kernel, dtbs and cmdline in /boot
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# output is an tar to be extracted onto a SD card
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mkdir -p /files
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cd /files
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# extract. BSD tar auto recognises compression
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[ -t 0 ] || bsdtar xzf -
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cd /
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# copy/convert files
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cp /files/boot/dtb/broadcom/bcm2837-rpi-3-b.dtb /boot
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/bin/mkimage -A arm64 -O linux -T kernel -C gzip -a 0x80000 -e 0x80000 \
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-d /files/boot/kernel /boot/kernel.uimg >> /boot/uboot.log
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/bin/mkimage -A arm64 -O linux -T script -C none -a 0x00000000 -e 0x00000000 -n RPi3 \
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-d /boot/boot.script /boot/boot.scr >> /boot/uboot.log
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# build an initrd and convert it
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rm -rf /files/boot
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cd /files && find . | cpio -o -H newc | gzip > /initrd.img
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/bin/mkimage -A arm64 -O linux -T ramdisk -d /initrd.img /boot/initrd.uimg >> /boot/uboot.log
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# now everything is setup in /boot just need to tar it
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cd /boot && tar cf - .
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11
tools/mkimage-rpi3/u-boot.patch
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11
tools/mkimage-rpi3/u-boot.patch
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diff --git a/include/configs/rpi.h b/include/configs/rpi.h
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index c499b45..1faae3c 100644
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--- a/include/configs/rpi.h
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+++ b/include/configs/rpi.h
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@@ -161,4 +161,6 @@
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BOOTENV
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+#define CONFIG_SYS_BOOTM_LEN (64 * 1024 * 1024)
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+
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#endif
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