configs/orangepi_zero_defconfig: switch to extlinux

Changes:
* Exclude FAT partition, it is no longer needed for U-Boot.
* Switch the rootfs partition from MBR to GPT for partition-uuid to work.
* Switch to extlinux, this is convenient for debugging.
* Create common scenarios for multiple boards to create an SD image:
  board/orangepi/common. Currently only orangepi_zero makes use of the
  common infrastructure.

Signed-off-by: Sergey Kuzminov <kuzminov.sergey81@gmail.com>
Reviewed-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Tested-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
[Arnout: remove rootfs size = 63M and remount rw]
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

board/orangepi/common/extlinux.conf

@@ -0,0 +1,4 @@
+LABEL default
+  kernel /boot/%LINUXIMAGE%
+  devicetreedir /boot
+  append root=PARTUUID=%PARTUUID% rootwait console=${console} rootfstype=ext4 quiet panic=10

board/orangepi/common/genimage.cfg

@@ -0,0 +1,20 @@
+image sdcard.img {
+	partition u-boot {
+		in-partition-table = false
+		image = "u-boot-sunxi-with-spl.bin"
+		offset = 8K
+		size = 1000K # 1MB - 8KB(offset) - 16KB(GPT)
+	}
+
+	hdimage {
+		partition-table-type = gpt
+		gpt-location = 1008K # 1MB - 16KB(GPT)
+		gpt-no-backup = true
+	}
+
+	partition rootfs {
+		offset = 1M
+		image = "rootfs.ext4"
+		partition-uuid = %PARTUUID%
+	}
+}

board/orangepi/common/post-build.sh

@@ -0,0 +1,34 @@
+#!/bin/sh
+
+linux_image()
+{
+	if grep -Eq "^BR2_LINUX_KERNEL_UIMAGE=y$" ${BR2_CONFIG}; then
+		echo "uImage"
+	elif grep -Eq "^BR2_LINUX_KERNEL_IMAGE=y$" ${BR2_CONFIG}; then
+		echo "Image"
+	elif grep -Eq "^BR2_LINUX_KERNEL_IMAGEGZ=y$" ${BR2_CONFIG}; then
+		echo "Image.gz"
+	else
+		echo "zImage"
+	fi
+}
+
+generic_getty()
+{
+	if grep -Eq "^BR2_TARGET_GENERIC_GETTY=y$" ${BR2_CONFIG}; then
+		echo ""
+	else
+		echo "s/\s*console=\S*//"
+	fi
+}
+
+PARTUUID="$($HOST_DIR/bin/uuidgen)"
+
+install -d "$TARGET_DIR/boot/extlinux/"
+
+sed -e "$(generic_getty)" \
+	-e "s/%LINUXIMAGE%/$(linux_image)/g" \
+	-e "s/%PARTUUID%/$PARTUUID/g" \
+	"board/orangepi/common/extlinux.conf" > "$TARGET_DIR/boot/extlinux/extlinux.conf"
+
+sed "s/%PARTUUID%/$PARTUUID/g" "board/orangepi/common/genimage.cfg" > "$BINARIES_DIR/genimage.cfg"

board/orangepi/orangepi-zero/boot.cmd

@@ -1,9 +0,0 @@
-setenv fdt_high ffffffff
-
-part uuid mmc 0:2 uuid
-setenv bootargs console=ttyS0,115200 root=PARTUUID=${uuid} rootwait
-
-fatload mmc 0 $kernel_addr_r zImage
-fatload mmc 0 $fdt_addr_r sun8i-h2-plus-orangepi-zero.dtb
-
-bootz $kernel_addr_r - $fdt_addr_r

board/orangepi/orangepi-zero/genimage.cfg

@@ -1,36 +0,0 @@
-# Minimal SD card image for the OrangePi Zero
-#
-image boot.vfat {
-	vfat {
-		files = {
-			"zImage",
-			"sun8i-h2-plus-orangepi-zero.dtb",
-			"boot.scr"
-		}
-	}
-	size = 10M
-}
-
-image sdcard.img {
-	hdimage {
-	}
-
-	partition u-boot {
-		in-partition-table = "no"
-		image = "u-boot-sunxi-with-spl.bin"
-		offset = 8K
-		size = 1016K # 1MB - 8KB
-	}
-
-	partition boot {
-		partition-type = 0xC
-		bootable = "true"
-		image = "boot.vfat"
-	}
-
-	partition rootfs {
-		partition-type = 0x83
-		image = "rootfs.ext4"
-		size = 512M
-	}
-}

configs/orangepi_zero_defconfig

@@ -20,6 +20,7 @@ BR2_LINUX_KERNEL_DTS_SUPPORT=y
 BR2_LINUX_KERNEL_INTREE_DTS_NAME="sun8i-h2-plus-orangepi-zero"
 BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES="board/orangepi/orangepi-zero/linux-extras.fragment"
 BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
+BR2_LINUX_KERNEL_INSTALL_TARGET=y
 
 # Filesystem
 BR2_TARGET_ROOTFS_EXT2=y
@@ -39,16 +40,12 @@ BR2_TARGET_UBOOT_SPL=y
 BR2_TARGET_UBOOT_SPL_NAME="u-boot-sunxi-with-spl.bin"
 
 # Required tools to create the SD image
-BR2_PACKAGE_HOST_UBOOT_TOOLS=y
-BR2_PACKAGE_HOST_UBOOT_TOOLS_BOOT_SCRIPT=y
-BR2_PACKAGE_HOST_UBOOT_TOOLS_BOOT_SCRIPT_SOURCE="board/orangepi/orangepi-zero/boot.cmd"
-BR2_PACKAGE_HOST_DOSFSTOOLS=y
 BR2_PACKAGE_HOST_GENIMAGE=y
-BR2_PACKAGE_HOST_MTOOLS=y
 
 # Image
+BR2_ROOTFS_POST_BUILD_SCRIPT="board/orangepi/common/post-build.sh"
 BR2_ROOTFS_POST_IMAGE_SCRIPT="support/scripts/genimage.sh"
-BR2_ROOTFS_POST_SCRIPT_ARGS="-c board/orangepi/orangepi-zero/genimage.cfg"
+BR2_ROOTFS_POST_SCRIPT_ARGS="-c $(BINARIES_DIR)/genimage.cfg"
 
 # Wireless driver and firmware
 BR2_PACKAGE_XR819_XRADIO=y