initial commit

board/raspberrypi3_swupdate/uboot-env.txt

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+# U-Boot environment variables for A/B boot system
+# Default variables for first boot - these will be modified during operation
+
+# Active partition (A or B)
+active_part=A
+active_root=/dev/mmcblk0p2
+inactive_part=B
+inactive_root=/dev/mmcblk0p3
+
+# Boot attempt counters
+bootcount=0
+bootlimit=3
+
+# Default bootcmd
+bootcmd=run bootcmd_${active_part}
+
+# Kernel boot arguments
+bootargs=console=ttyAMA0,115200 console=tty1 root=${active_root} rootwait
+
+# Commands for booting from A or B partitions
+bootcmd_A=setenv bootargs console=ttyAMA0,115200 console=tty1 root=/dev/mmcblk0p2 rootwait; load mmc 0:1 ${kernel_addr_r} zImage; load mmc 0:1 ${fdt_addr_r} bcm2710-rpi-3-b.dtb; bootz ${kernel_addr_r} - ${fdt_addr_r}
+bootcmd_B=setenv bootargs console=ttyAMA0,115200 console=tty1 root=/dev/mmcblk0p3 rootwait; load mmc 0:1 ${kernel_addr_r} zImage; load mmc 0:1 ${fdt_addr_r} bcm2710-rpi-3-b.dtb; bootz ${kernel_addr_r} - ${fdt_addr_r}
+
+# Fallback logic for failed boots
+altbootcmd=if test ${active_part} = A; then setenv active_part B; setenv active_root /dev/mmcblk0p3; setenv inactive_part A; setenv inactive_root /dev/mmcblk0p2; else setenv active_part A; setenv active_root /dev/mmcblk0p2; setenv inactive_part B; setenv inactive_root /dev/mmcblk0p3; fi; setenv bootcount 0; saveenv; run bootcmd
+
+# Memory addresses
+kernel_addr_r=0x01000000
+fdt_addr_r=0x02000000
+
+# Board name
+board_name=rpi3
+
+# Network configuration (DHCP)
+autoload=no
+ethact=smi
+ethaddr_sdio0=00:44:55:66:77:88