added support for old raspberry pi
This commit is contained in:
Benjamin Böhmke
parent
9e1a592de4
commit
6679b00bcd
11
Dockerfile
11
Dockerfile
@ -1,8 +1,10 @@
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FROM debian:buster AS uboot
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FROM debian:buster AS build_base
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RUN apt-get update && \
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apt-get install -y build-essential git wget bison flex gcc-arm-linux-gnueabi device-tree-compiler bc
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FROM build_base AS uboot
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RUN mkdir /uboot_build/ && \
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mkdir /uboot/
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@ -43,6 +45,12 @@ RUN make CROSS_COMPILE=arm-linux-gnueabi- distclean && \
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make CROSS_COMPILE=arm-linux-gnueabi- -j8 u-boot.bin && \
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cp u-boot.bin /uboot/u-boot_rpi4.bin
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FROM build_base AS uboot_tool
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ADD ./resources/uboot.c /uboot.c
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RUN arm-linux-gnueabi-gcc -Wall -static -static-libgcc -o /uboot_tool /uboot.c
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FROM alpine:3.10
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@ -70,5 +78,6 @@ RUN cd /genext2fs && \
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ADD ./resources /resources
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COPY --from=uboot /uboot/ /uboot/
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COPY --from=uboot_tool /uboot_tool /uboot_tool
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WORKDIR /work
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@ -1,46 +1,106 @@
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# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
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# static config
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setenv boot_partition_a 2
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setenv boot_partition_b 3
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setenv boot_limit 2
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# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
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setenv boot_partition_a 0x02
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setenv boot_partition_b 0x03
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setenv boot_limit 0x02
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setenv boot_partition_base "/dev/mmcblk0p"
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setenv addr_version 0x10000
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setenv addr_boot_counter 0x10001
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setenv addr_boot_partition 0x10002
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# set default values if env not set
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if printenv boot_count; then
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else
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setenv boot_count 1
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# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
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# load persistence values
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# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
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# clear memory
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mw.b 0x10000 0 0x404
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# load uboot file
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fatload mmc 0:1 0x10000 uboot.dat 0x400
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# check CRC
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crc32 0x10000 0x3FC 0x10400
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if itest *0x103FC -ne *0x10400; then
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echo "invalid CRC -> fallback to default values"
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# default values
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mw.b ${addr_version} 0x01
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mw.b ${addr_boot_counter} 0x00
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mw.b ${addr_boot_partition} ${boot_partition_a}
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fi
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if printenv boot_partition; then
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# check if valid partition a or b
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if test ${boot_partition} -ne ${boot_partition_a} && test ${boot_partition} -ne ${boot_partition_b}; then
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setenv boot_partition ${boot_partition_a}
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fi
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else
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setenv boot_partition ${boot_partition_a}
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# ensure boot partition is valid
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if itest.b *${addr_boot_partition} -ne ${boot_partition_a} && test.b *${addr_boot_partition} -ne ${boot_partition_b}; then
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mw.b ${addr_boot_partition} ${boot_partition_a}
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fi
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# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
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# fallback boot
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# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
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echo "Check fallback boot"
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# switch boot partition if boot count exceed limit
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if test ${boot_count} -ge ${boot_limit}; then
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if itest.b *${addr_boot_counter} -ge ${boot_limit}; then
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echo "!!! Boot limit exceed !!!"
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if test ${boot_partition} -eq ${boot_partition_a}; then
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setenv boot_partition ${boot_partition_b}
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if itest *${addr_boot_partition} -eq ${boot_partition_a}; then
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mv.b ${addr_boot_partition} ${boot_partition_b}
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else
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setenv boot_partition ${boot_partition_a}
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mv.b ${addr_boot_partition} ${boot_partition_a}
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fi
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setenv boot_count 0
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mw.b ${addr_boot_counter} 0
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setexpr.b boot_partition *${addr_boot_partition}
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echo "Switch active partition to ${boot_partition_base}${boot_partition}"
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else
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# increase boot_count
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setexpr.b tmp *${addr_boot_counter} + 1
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mw.b ${addr_boot_counter} ${tmp}
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setexpr.b boot_partition *${addr_boot_partition}
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fi
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# increase boot_count
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setexpr boot_count ${boot_count} + 1
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# store settings
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saveenv
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# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
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# store persistence values
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# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
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# overwrite version
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mw.b 0x10000 0x01
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# calculate crc
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crc32 0x10000 0x3FC 0x103FC
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# save to uboot file
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fatwrite mmc 0:1 0x10000 uboot.dat 0x400
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# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
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# select kernel
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# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
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echo "select kernel"
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setenv boot_kernel "/boot/uImage"
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# only if new pi a new kernel is required
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setexpr board_new_pi ${board_revision} \& 0x800000
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if test ${board_new_pi} > 0; then
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echo "new board"
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# get cpu id from revision
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setexpr board_cpu ${board_revision} \& 0xF000
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# at the moment CPU except the oldest need the new kernel
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if test ${board_cpu} > 0x0000; then
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setenv boot_kernel "/boot/uImage2"
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fi
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else
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echo "old board"
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fi
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echo "Load kernel ${boot_kernel}"
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# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
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# boot
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# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
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# load bootargs from pi boot loader
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fdt addr ${fdt_addr} && fdt get value bootargs /chosen bootargs
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@ -48,7 +108,7 @@ fdt addr ${fdt_addr} && fdt get value bootargs /chosen bootargs
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setexpr bootargs sub " root=[^ ]+" " root=${boot_partition_base}${boot_partition}" "${bootargs}"
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# load kernel and boot
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ext4load mmc 0:${boot_partition} ${kernel_addr_r} /boot/uImage
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ext4load mmc 0:${boot_partition} ${kernel_addr_r} ${boot_kernel}
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bootm ${kernel_addr_r} - ${fdt_addr}
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reset
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reset
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@ -12,8 +12,8 @@ set -e
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: ${DEFAULT_ROOT_PASSWORD:="alpine"}
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: ${SIZE_BOOT:="100M"}
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: ${SIZE_ROOT_FS:="150M"}
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: ${SIZE_ROOT_PART:="250M"}
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: ${SIZE_ROOT_FS:="200M"}
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: ${SIZE_ROOT_PART:="500M"}
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: ${SIZE_DATA:="20M"}
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: ${IMG_NAME:="alpine-${ALPINE_BRANCH}-sdcard"}
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@ -22,7 +22,7 @@ set -e
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# static config
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# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
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RES_PATH=/resources/
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BASE_PACKAGES="alpine-base tzdata parted ifupdown e2fsprogs-extra util-linux coreutils linux-rpi2 uboot-tools openntpd"
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BASE_PACKAGES="alpine-base tzdata parted ifupdown e2fsprogs-extra util-linux coreutils linux-rpi linux-rpi2"
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WORK_PATH="/work"
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OUTPUT_PATH="/output"
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@ -139,20 +139,12 @@ mkdir -p ${ROOTFS_PATH}/dev/shm
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mkdir -p ${ROOTFS_PATH}/var/lock
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# time
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chroot_exec rc-update add openntpd default
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cat >${ROOTFS_PATH}/etc/conf.d/openntpd <<EOF
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NTPD_OPTS="-s"
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EOF
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cat >${ROOTFS_PATH}/etc/ntpd.conf <<EOF
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servers pool.ntp.org
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EOF
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chroot_exec rc-update add ntpd default
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# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
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# uboot tools config
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cat >${ROOTFS_PATH}/etc/fw_env.config <<EOF
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/uboot/uboot.env 0x0000 0x4000
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EOF
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# uboot tools
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cp /uboot_tool ${ROOTFS_PATH}/sbin/uboot_tool
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# TODO REMOVE THIS
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# mark system as booted (should be moved to application)
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@ -160,7 +152,7 @@ cat >${ROOTFS_PATH}/etc/local.d/99-uboot.start <<EOF
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#!/bin/sh
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mount -o remount,rw /uboot
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fw_setenv boot_count 1
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/sbin/uboot_tool reset_counter
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sync
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mount -o remount,ro /uboot
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@ -182,6 +174,9 @@ ln -s /data/etc/dropbear/dropbear.conf ${ROOTFS_PATH}/etc/conf.d/dropbear
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# cleanup
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rm -rf ${ROOTFS_PATH}/var/cache/apk/*
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rm -rf ${ROOTFS_PATH}/boot/initramfs*
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rm -rf ${ROOTFS_PATH}/boot/System*
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rm -rf ${ROOTFS_PATH}/boot/config*
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# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
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echo ">> Move persistent data to /data"
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@ -248,7 +243,8 @@ ln -fs /data/etc/shadow ${ROOTFS_PATH}/etc/shadow
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echo ">> Prepare kernel for uboot"
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# build uImage
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mkimage -A arm -O linux -T kernel -C none -a 0x00008000 -e 0x00008000 -n "Linux kernel" -d ${ROOTFS_PATH}/boot/vmlinuz-rpi2 ${ROOTFS_PATH}/boot/uImage
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mkimage -A arm -O linux -T kernel -C none -a 0x00008000 -e 0x00008000 -n "Linux kernel" -d ${ROOTFS_PATH}/boot/vmlinuz-rpi ${ROOTFS_PATH}/boot/uImage
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mkimage -A arm -O linux -T kernel -C none -a 0x00008000 -e 0x00008000 -n "Linux kernel" -d ${ROOTFS_PATH}/boot/vmlinuz-rpi2 ${ROOTFS_PATH}/boot/uImage2
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# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
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@ -19,10 +19,8 @@ current_idx=$(rdev | sed 's#/dev/mmcblk0p\([^ ]*\).*#\1#')
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if [ $current_idx -eq 2 ]; then
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echo "Start update for partition B"
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flash_idx=3
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else
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echo "Start update for partition A"
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flash_idx=2
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fi
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flash_device="/dev/mmcblk0p${flash_idx}"
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@ -33,7 +31,7 @@ gunzip -c ${image_file} | dd of=${flash_device} status=progress
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# switch active partition
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mount -o remount,rw /uboot
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fw_setenv boot_partition ${flash_idx}
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/sbin/uboot_tool part_switch
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sync
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mount -o remount,ro /uboot
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125
resources/uboot.c
Normal file
125
resources/uboot.c
Normal file
@ -0,0 +1,125 @@
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#include <stdio.h>
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#include <stdint.h>
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#include <string.h>
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char* uboot_file = "/uboot/uboot.dat";
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void printHelp() {
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printf("Usage: uboot_tool [COMMAND]\n");
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printf("\n");
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printf("Commands:\n");
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printf(" part_current - show current partition\n");
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printf(" part_switch - switch active partition\n");
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printf(" reset_counter - reset boot counter\n");
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printf(" version - show version of file\n");
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}
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uint32_t crc32(uint8_t* data, size_t length, uint32_t seed) {
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uint32_t crc = ~seed;
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while (length--) {
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crc ^= (*data++);
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for (unsigned int j = 0; j < 8; j++) {
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if (crc & 1) {
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crc = (crc >> 1) ^ 0xedb88320L;
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} else {
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crc = crc >> 1;
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}
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}
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}
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return ~crc;
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}
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int main(int argc, char* argv[]) {
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// show help if no command given
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if (argc < 2) {
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printHelp();
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return 1;
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}
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char* cmd = argv[1];
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// read uboot file
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FILE* file = fopen(uboot_file, "rb");
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if (file == NULL) {
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printf("Failed to open uboot file: %s\n", uboot_file);
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return 2;
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}
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uint8_t data[1024];
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size_t err = fread(data, 1, sizeof(data), file);
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if (err == 0) {
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printf("Failed to read uboot file: %s\n", uboot_file);
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return 2;
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}
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fclose(file);
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// get crc from file
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uint32_t crc = (data[1023] << 24) +
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(data[1022] << 16) +
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(data[1021] << 8) +
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data[1020];
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// check if CRC is valid
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if (crc != crc32(data, 0x3FC, 0)) {
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fprintf(stderr, "Invalid CRC -> fallback to default\n");
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memset(data, 0, sizeof(data));
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// file version
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data[0] = 1;
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// boot counter
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data[1] = 0;
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// boot partition
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data[2] = 2; // A=2, B=3
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}
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// handle commands
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uint8_t save = 0;
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if (strcmp(cmd, "version") == 0) {
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printf("0x%02x\n", data[0]);
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} else if (strcmp(cmd, "part_current") == 0) {
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printf("%d\n", data[2]);
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} else if (strcmp(cmd, "part_switch") == 0) {
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if (data[2] == 2) {
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data[2] = 3;
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} else {
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data[2] = 2;
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}
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save = 1;
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} else if (strcmp(cmd, "reset_counter") == 0) {
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data[1] = 0;
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save = 1;
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} else {
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printf("Unknown command\n");
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return 10;
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}
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if (save == 1) {
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// calculate new CRC
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crc = crc32(data, 0x3FC, 0);
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data[1023] = (uint8_t)((crc & 0xFF000000U)>>24);
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data[1022] = (uint8_t)((crc & 0x00FF0000U)>>16);
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data[1021] = (uint8_t)((crc & 0x0000FF00U)>>8);
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data[1020] = (uint8_t)((crc & 0x000000FFU));
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// write uboot file
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file = fopen(uboot_file, "wb");
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if (file == NULL) {
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printf("Failed to open uboot file: %s\n", uboot_file);
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return 4;
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}
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size_t err = fwrite(data, 1, sizeof(data), file);
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if (err == 0) {
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printf("Failed to write uboot file: %s\n", uboot_file);
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return 4;
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}
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fclose(file);
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}
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return 0;
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}
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