5756969be9
* Avoid trying to boot non-existing kernel image in fail-over case The A/B update system automatically switches to the other boot slot when booting fails. However, in a fresh installation, only boot slot A exists. If booting fails three times (e.g. if somebody plugs out power before the slot can be marked as good), then the system switches to boot slot B which does not contain a kernel image yet. Avoid trying to boot the non-existing kernel image. With this change, if slot B is empty U-Boot will restore both slots to 3 attempts and retry booting from slot A on next reboot: ``` Trying to boot slot B, 2 attempts remaining. Loading kernel ... ** Unrecognized filesystem type ** No valid slot found, resetting tries to 3 storing env... ``` Co-authored-by: Pascal Vizeli <pascal.vizeli@syshack.ch>
73 lines
2.3 KiB
Plaintext
73 lines
2.3 KiB
Plaintext
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part start mmc ${devnum} 6 mmc_env
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mmc dev ${devnum}
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setenv loadbootstate " \
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echo 'loading env...'; \
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mmc read ${ramdisk_addr_r} ${mmc_env} 0x40; \
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env import -c ${ramdisk_addr_r} 0x8000;"
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setenv storebootstate " \
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echo 'storing env...'; \
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env export -c -s 0x8000 ${ramdisk_addr_r} BOOT_ORDER BOOT_A_LEFT BOOT_B_LEFT MACHINE_ID; \
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mmc write ${ramdisk_addr_r} ${mmc_env} 0x40;"
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run loadbootstate
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test -n "${BOOT_ORDER}" || setenv BOOT_ORDER "A B"
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test -n "${BOOT_A_LEFT}" || setenv BOOT_A_LEFT 3
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test -n "${BOOT_B_LEFT}" || setenv BOOT_B_LEFT 3
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# HassOS bootargs
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setenv bootargs_hassos "zram.enabled=1 zram.num_devices=3 apparmor=1 security=apparmor systemd.machine_id=${MACHINE_ID} cgroup_enable=memory fsck.repair=yes"
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# HassOS system A/B
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setenv bootargs_a "root=PARTUUID=8d3d53e3-6d49-4c38-8349-aff6859e82fd rootfstype=squashfs ro rootwait"
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setenv bootargs_b "root=PARTUUID=a3ec664e-32ce-4665-95ea-7ae90ce9aa20 rootfstype=squashfs ro rootwait"
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# Load extraargs
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fileenv mmc ${devnum}:1 ${ramdisk_addr_r} cmdline.txt cmdline
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# Load device tree
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if test "$devnum" = "0"; then
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fatload mmc ${devnum}:1 ${fdt_addr_r} rk3288-tinker-s.dtb
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else
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fatload mmc ${devnum}:1 ${fdt_addr_r} rk3288-tinker.dtb
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fi
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setenv bootargs
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for BOOT_SLOT in "${BOOT_ORDER}"; do
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if test "x${bootargs}" != "x"; then
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# skip remaining slots
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elif test "x${BOOT_SLOT}" = "xA"; then
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if test ${BOOT_A_LEFT} -gt 0; then
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setexpr BOOT_A_LEFT ${BOOT_A_LEFT} - 1
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echo "Trying to boot slot A, ${BOOT_A_LEFT} attempts remaining. Loading kernel ..."
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if ext4load mmc ${devnum}:2 ${kernel_addr_r} zImage; then
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setenv bootargs "${bootargs_hassos} ${bootargs_a} rauc.slot=A ${cmdline}"
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fi
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fi
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elif test "x${BOOT_SLOT}" = "xB"; then
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if test ${BOOT_B_LEFT} -gt 0; then
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setexpr BOOT_B_LEFT ${BOOT_B_LEFT} - 1
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echo "Trying to boot slot B, ${BOOT_B_LEFT} attempts remaining. Loading kernel ..."
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if ext4load mmc ${devnum}:4 ${kernel_addr_r} zImage"; then
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setenv bootargs "${bootargs_hassos} ${bootargs_b} rauc.slot=B ${cmdline}"
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fi
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fi
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done
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if test -n "${bootargs}"; then
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run storebootstate
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else
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echo "No valid slot found, resetting tries to 3"
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setenv BOOT_A_LEFT 3
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setenv BOOT_B_LEFT 3
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run storebootstate
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reset
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fi
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echo "Starting kernel"
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bootz ${kernel_addr_r} - ${fdt_addr_r}
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echo "Boot failed, resetting..."
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reset
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