further progress

board/raspberrypi3_swupdate/config.txt

@@ -20,5 +20,5 @@ gpu_mem=32
 kernel=u-boot.bin
 
 # dt overlays
-#dtoverlay=disable-bt
+dtoverlay=disable-bt
 #dtoverlay=disable-wifi

board/raspberrypi3_swupdate/genimage-raspberrypi3_swupdate.cfg

@@ -8,8 +8,11 @@ image boot.vfat {
       "config.txt",
       "boot.scr",
       "Image",
-      "u-boot.bin"
-      "uboot-env.img",
+      "u-boot.bin",
+
+    }
+    file uboot.env {
+      image = "uboot-env.img"
     }
     file overlays/README {
       image = "rpi-firmware/overlays/README"

board/raspberrypi3_swupdate/post-image.sh

@@ -28,7 +28,7 @@ touch ${TARGET_DIR}/etc/rootfs-A
 cp ${BINARIES_DIR}/rootfs.ext4 ${BINARIES_DIR}/rootfs-B.ext4
 
 # Create uboot environment
-${HOST_DIR}/bin/mkenvimage -s 131072 -o "${BINARIES_DIR}/uboot-env.img" "${BOARD_DIR}/uboot-env.txt"
+${HOST_DIR}/bin/mkenvimage -s 0x4000 -o "${BINARIES_DIR}/uboot-env.img" "${BOARD_DIR}/uboot-env.txt"
 # Copy U-Boot environment image as uboot.env to rpi-firmware directory
 cp "${BINARIES_DIR}/uboot-env.img" "${BINARIES_DIR}/rpi-firmware/uboot.env"
 

board/raspberrypi3_swupdate/uboot-env.txt

@@ -2,6 +2,8 @@
 # Default variables for first boot - these will be modified during operation
 
 # Active partition (A or B)
+kernel_addr_r=0x01000000
+fdt_addr_r=0x03000000
 active_part=A
 active_root=/dev/mmcblk0p2
 inactive_part=B
@@ -15,11 +17,11 @@ bootlimit=3
 bootcmd=run bootcmd_${active_part}
 
 # Kernel boot arguments
-bootargs=console=ttyAMA0,115200 console=tty1 root=${active_root} rootwait
+bootargs=console=ttyS0,115200 root=${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}
+bootcmd_A=setenv bootargs console=ttyS0,115200 root=/dev/mmcblk0p2 rootwait; load mmc 0:1 ${kernel_addr_r} Image; load mmc 0:1 0x03000000 bcm2710-rpi-3-b.dtb; booti ${kernel_addr_r} - 0x03000000
+bootcmd_B=setenv bootargs console=ttyS0,115200 root=/dev/mmcblk0p3 rootwait; load mmc 0:1 ${kernel_addr_r} Image; load mmc 0:1 0x03000000 bcm2710-rpi-3-b.dtb; booti ${kernel_addr_r} - 0x03000000
 
 # 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

board/raspberrypi3_swupdate/uboot.config

@@ -7,10 +7,14 @@ CONFIG_EFI_CAPSULE_AUTHENTICATE=n
 
 # Ensure the basic features we need are enabled
 CONFIG_ENV_IS_IN_FAT=y
+CONFIG_ENV_FAT_INTERFACE="mmc"
+CONFIG_ENV_FAT_DEVICE_AND_PART="0:auto"
+CONFIG_ENV_FAT_FILE="uboot.env"
 CONFIG_CMD_GPT=y
 CONFIG_CMD_MMC=y
 CONFIG_CMD_USB=y
 CONFIG_CMD_FS_GENERIC=y
+CONFIG_CMD_BOOTI=y
 
 # Explicitly enable UART
 CONFIG_BAUDRATE=115200