DTB Overlay Support and extlinux.conf (#43)

.github/workflows/buildroot.yml

@@ -73,8 +73,7 @@ jobs:
         echo "DTB=${{ github.workspace }}/buildroot/output/images/bl808-*.dtb" >> $GITHUB_ENV
         echo "OPENSBI=${{ github.workspace }}/buildroot/output/images/fw_jump.bin" >> $GITHUB_ENV
         echo "LOWLOAD=${{ github.workspace }}/buildroot/output/images/*_lowload_bl808_*.bin" >> $GITHUB_ENV
-        echo "WHOLEBINOX=${{ github.workspace }}/buildroot/output/images/pine64-ox64-firmware.bin" >> $GITHUB_ENV
-        echo "WHOLEBINM1=${{ github.workspace }}/buildroot/output/images/sispeed-m1s-firmware.bin" >> $GITHUB_ENV
+        echo "WHOLEBINOX=${{ github.workspace }}/buildroot/output/images/bl808-firmware.bin" >> $GITHUB_ENV
         echo "BRSDK=${{ github.workspace }}/buildroot/output/images/riscv*.tar.gz" >> $GITHUB_ENV
     - name: Upload package
       uses: actions/upload-artifact@master
@@ -87,7 +86,6 @@ jobs:
           ${{env.OPENSBI}}
           ${{env.LOWLOAD}}
           ${{env.WHOLEBINOX}}
-          ${{env.WHOLEBINM1}}
     - name: Upload sdk
       if: matrix.target == 'pine64_ox64_full_defconfig'
       uses: actions/upload-artifact@master
@@ -123,8 +121,7 @@ jobs:
         mv Image-${{ matrix.target }}.lz4 Image.lz4
         mkdir firmware
         cp *_lowload_bl808_*.bin firmware/
-        cp pine64-ox64-firmware.bin firmware/
-        cp sispeed-m1s-firmware.bin firmware/
+        cp bl808-firmware.bin firmware/
         cp sdcard-${{ matrix.target }}.img.xz firmware/
         tar -czvf bl808-linux-${{ matrix.target }}.tar.gz firmware
         echo "FIRMWARE=${{ github.workspace }}/build/bl808-linux-${{ matrix.target }}.tar.gz" >> $GITHUB_ENV

README.md

@@ -23,7 +23,7 @@ The SD card images are configured with a 1Gb Swap Partition, and will resize the
 Inside the downloads you will find the following files:
 * m0_lowload_bl808_m0.bin - This firmware runs on M0 and forwards interupts to the D0 for several peripherals
 * d0_lowload_bl808_d0.bin - This is a very basic bootloader that loads opensbi, the kernel and dts files into ram
-* pine64-ox64-firmware.bin/sispeed-m1s-firmware.bin - A image containing OpenSBI, the Kernel and DTS files for Pine64 OX64 and SiSpeed M1S Dock
+* bl808-firmware.bin - A image containing OpenSBI, Uboot and uboot dtb files. 
 * sdcard-*.tar.xz - A tarball containing the rootfs for the image to be flashed to the SD card
 
 ### Development images
@@ -51,7 +51,7 @@ Download your prefered image above and extract the files.
 - D0 Group[Group0] Image Addr [0x58100000] [PATH to d0_low_load_bl808_d0.bin]
 - Click 'Create & Download' and wait until it's done
 - Switch to [IOT] page
-- Enable 'Single Download', set Address with 0x800000, choose [PATH to pine64-ox64-firmware.bin/sispeed-m1s-firmware.bin] (depending on your board)
+- Enable 'Single Download', set Address with 0x800000, choose [bl808-firmware.bin]
 - Click 'Create & Download' again and wait until it's done
 - flash the sdcard-pine64-*.img.xz to your SD card (you can use dd (after uncompressing) or https://github.com/balena-io/etcher)
 - Serial Console access:

board/pine64/ox64/genimage.cfg

@@ -8,6 +8,9 @@ image boot.vfat {
 			"boot-m1s.scr",
 			"boot-pine64.scr",
 		}
+		file "extlinux/extlinux.conf" {
+			image  = "extlinux/extlinux.conf"
+		}
 	}
 	size = 200M
 }

board/pine64/ox64/patches/uboot/0002-add-a-few-more-variables-for-extlinux-loading-to-wor.patch

@@ -0,0 +1,22 @@
+From da8f2c5011a1783d3458b42d49b274e935fb80f9 Mon Sep 17 00:00:00 2001
+From: Justin Hammond <justin@dynam.ac>
+Date: Sat, 4 Mar 2023 15:53:10 +0800
+Subject: [PATCH] add a few more variables for extlinux loading to work
+
+---
+diff --git a/include/configs/bl808.h b/include/configs/bl808.h
+index 976640894d..5de6947958 100644
+--- a/include/configs/bl808.h
++++ b/include/configs/bl808.h
+@@ -46,7 +46,10 @@
+
+ #define CFG_EXTRA_ENV_SETTINGS \
+         "scriptaddr=0x50000000\0" \
+-	BOOTENV
++        "kernel_addr_r=0x50200000\0" \
++        "fdt_addr_r=0x51ff8000\0" \
++        "fdtoverlay_addr_r=0x52008000\0" \
++ 	BOOTENV
+ #endif
+
+ #endif /* __CONFIG_H */

board/pine64/ox64/post-build.sh

@@ -1,18 +1,17 @@
 #!/bin/sh
-#echo "Compressing Kernel Image"
-#lz4 -9 -f $BINARIES_DIR/Image $BINARIES_DIR/Image.lz4
 echo "Compressing UBoot Image"
 lz4 -9 -f $BINARIES_DIR/u-boot.bin $BINARIES_DIR/u-boot.bin.lz4
 cd $BINARIES_DIR
-echo "Creating OpenSBI/DTB/Kernel Image"
-$BR2_EXTERNAL_BOUFFALO_BR_PATH/board/pine64/ox64/mergebin.py -o pine64-ox64-firmware.bin -k u-boot.bin.lz4 -d u-boot.dtb -s fw_jump.bin
-$BR2_EXTERNAL_BOUFFALO_BR_PATH/board/pine64/ox64/mergebin.py -o sispeed-m1s-firmware.bin -k u-boot.bin.lz4 -d u-boot.dtb -s fw_jump.bin
+echo "Creating OpenSBI/DTB/Uboot Image"
+$BR2_EXTERNAL_BOUFFALO_BR_PATH/board/pine64/ox64/mergebin.py -o bl808-firmware.bin -k u-boot.bin.lz4 -d u-boot.dtb -s fw_jump.bin
 echo "Copying Boot Script"
 $BINARIES_DIR/../host/bin/mkimage -C none -A riscv -T script -d $BR2_EXTERNAL_BOUFFALO_BR_PATH/board/pine64/ox64/boot-m1s.cmd $BINARIES_DIR/boot-m1s.scr
 $BINARIES_DIR/../host/bin/mkimage -C none -A riscv -T script -d $BR2_EXTERNAL_BOUFFALO_BR_PATH/board/pine64/ox64/boot-pine64.cmd $BINARIES_DIR/boot-pine64.scr
 cp $BINARIES_DIR/boot-pine64.scr $BINARIES_DIR/boot.scr
 cp $BINARIES_DIR/*.scr $TARGET_DIR/boot/
 cp $BR2_EXTERNAL_BOUFFALO_BR_PATH/board/pine64/ox64/*.cmd $TARGET_DIR/boot/
+mkdir -p $BINARIES_DIR/extlinux/
+cp $TARGET_DIR/boot/extlinux/* $BINARIES_DIR/extlinux/
 echo "Creating Filesystem Image"
 $BASE_DIR/../support/scripts/genimage.sh -c $BR2_EXTERNAL_BOUFFALO_BR_PATH/board/pine64/ox64/genimage.cfg
 echo "Completed - Images are at $BINARIES_DIR"

board/pine64/ox64/rootfs-overlay/boot/extlinux/extlinux.conf

@@ -0,0 +1,12 @@
+# Generic Distro Configuration file generated by OpenEmbedded
+menu title Select the boot mode
+TIMEOUT 30
+DEFAULT Pine64 OX64 Kernel
+LABEL Pine64 0X64 Kernel
+	KERNEL ../Image
+	FDT ../bl808-pine64-ox64.dtb
+	APPEND root=PARTLABEL=rootfs rootwait rw rootfstype=ext4 console=ttyS0,2000000 loglevel=8 earlycon=sbi
+LABEL Sipeed M1SDock Kernel
+	KERNEL ../Image
+	FDT ../bl808-sipeed-m1s.dtb
+	APPEND root=PARTLABEL=rootfs rootwait rw rootfstype=ext4 console=ttyS0,2000000 loglevel=8 earlycon=sbi

board/pine64/ox64/rootfs-overlay/root/README!!!!.txt

@@ -1,7 +1,11 @@
 By Default, this image is configured to boot the Pine64 Ox64 image. 
-If you want to boot a different image, please copy the boot-m1s.scr 
-in /boot to /boot/boot.scr
 
-The boot-m1s.scr/boot.scr file(s) are U-Boot scripts that will load the 
-correct DTB file the board you are using.
+To change the image, you need to edit the file /boot/extlinux/extlinux.conf 
+and change the Default entry to Sipeed M1SDock Kernel
 
+Alternatively, if you have custom images, and using uboot scripts, you can 
+add the relevent uboot script to the /boot/boot.scr file.
+
+Please see the following link for more information on how how uboot is 
+configured: 
+https://github.com/openbouffalo/buildroot_bouffalo/wiki/U-Boot-Bootflow

board/pine64/ox64/uboot_defconfig

@@ -24,10 +24,14 @@ CONFIG_BOOTCOMMAND="mmc rescan; sleep 1; mmc rescan; run distro_bootcmd"
 # CONFIG_BOOTM_PLAN9 is not set
 # CONFIG_BOOTM_RTEMS is not set
 # CONFIG_BOOTM_VXWORKS is not set
+CONFIG_CMD_BOOTMENU=y
 CONFIG_CMD_CLK=y
 CONFIG_CMD_GPIO=y
 CONFIG_CMD_MMC=y
 # CONFIG_OF_OMIT_DTB is not set
+CONFIG_ENV_IS_NOWHERE=y
+CONFIG_ENV_IS_IN_FAT=y
+CONFIG_ENV_FAT_DEVICE_AND_PART="0:auto"
 CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_MMC=y
 CONFIG_MMC_BROKEN_CD=y
@@ -41,3 +45,4 @@ CONFIG_PINCONF=y
 CONFIG_BAUDRATE=2000000
 CONFIG_SYSRESET=y
 # CONFIG_SHA256 is not set
+CONFIG_OF_LIBFDT_OVERLAY=y