130 lines
3.9 KiB
Batchfile
130 lines
3.9 KiB
Batchfile
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
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# static config
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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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# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
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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} ${boot_partition_a}
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fi
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setexpr.b boot_counter *${addr_boot_counter}
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setexpr.b boot_partition *${addr_boot_partition}
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echo "> boot counter: ${boot_counter}"
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echo "> boot partition: ${boot_partition}"
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# ensure boot partition is valid
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if itest.b *${addr_boot_partition} -ne ${boot_partition_a} && itest.b *${addr_boot_partition} -ne ${boot_partition_b}; then
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echo "switched to valid partition -> A"
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mw.b ${addr_boot_partition} ${boot_partition_a}
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fi
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# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
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# fallback boot
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# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
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echo "Check fallback boot"
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# switch boot partition if boot count exceed limit
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if itest.b *${addr_boot_counter} -ge ${boot_limit}; then
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echo "!!! Boot limit exceed !!!"
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if itest *${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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mv.b ${addr_boot_partition} ${boot_partition_a}
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fi
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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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# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
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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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# https://www.raspberrypi.org/documentation/hardware/raspberrypi/revision-codes/README.md
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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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# BCM2836 (pi2)
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if test ${board_cpu} == 0x1000; then
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setenv boot_kernel "/boot/uImage2"
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fi
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# BCM2837 (pi3)
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if test ${board_cpu} == 0x2000; then
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setenv boot_kernel "/boot/uImage2"
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fi
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# BCM2711 (pi4)
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if test ${board_cpu} > 0x3000; then
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setenv boot_kernel "/boot/uImage4"
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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 ${fdt_addr} && fdt get value bootargs /chosen bootargs
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# overwrite boot partition
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setexpr bootargs sub " root=[^ ]+" " root=${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_kernel}
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bootm ${kernel_addr_r} - ${fdt_addr}
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reset
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