Initial commit

target/linux/arc770/image/Config.in

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+config AXS10X_SD_BOOT_PARTSIZE
+	int "Boot (SD Card) filesystem partition size (in MB)"
+	depends on TARGET_arc770
+	default 20
+

target/linux/arc770/image/Makefile

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+#
+# Copyright (C) 2016 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+include $(TOPDIR)/rules.mk
+include $(INCLUDE_DIR)/image.mk
+
+# On ARC initramfs is put before entry point and so entry point moves
+# in memory from build to built. Thus we need to extract EP from vmlinux
+# every time before generation of uImage.
+kernel_ep = `$(KERNEL_CROSS)readelf -h $(1) | grep "Entry point address" | grep -o 0x.*`
+
+define Build/patch-dtb
+	$(STAGING_DIR_HOST)/bin/patch-dtb $@ $(DTS_DIR)/$(DEVICE_DTS).dtb
+endef
+
+ifneq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),)
+# Root FS built-in
+define Device/vmlinux
+	KERNEL_SUFFIX := .elf
+	KERNEL := kernel-bin | patch-dtb
+	KERNEL_INITRAMFS_NAME = vmlinux-initramfs.elf
+endef
+
+define Device/nsim
+	$(call Device/vmlinux)
+	DEVICE_PROFILE := nsim
+	DEVICE_DTS := nsim_700
+endef
+TARGET_DEVICES += nsim
+endif
+
+# Root FS on SD-card
+KERNEL_LOADADDR := 0x80000000
+DEVICE_DTS_LIST:= axs101 nsim_700
+FAT32_BLOCK_SIZE=1024
+FAT32_BLOCKS=$(shell echo $$(($(CONFIG_AXS10X_SD_BOOT_PARTSIZE)*1024*1024/$(FAT32_BLOCK_SIZE))))
+
+define Image/Prepare
+	# Build .dtb for all boards we may run on
+	$(foreach dts,$(DEVICE_DTS_LIST),
+		$(call Image/BuildDTB,$(DTS_DIR)/$(dts).dts,$(DTS_DIR)/$(dts).dtb)
+	)
+endef
+
+define Image/Build/SDCard
+	rm -f $(KDIR_TMP)/$(IMG_PREFIX)-$(PROFILE)-boot.img
+	mkfs.fat $(KDIR_TMP)/$(IMG_PREFIX)-$(PROFILE)-boot.img -C $(FAT32_BLOCKS)
+	mkimage -C none -A arc -T script -d uEnv.txt $(BIN_DIR)/uEnv.scr
+	mcopy -i $(KDIR_TMP)/$(IMG_PREFIX)-$(PROFILE)-boot.img $(BIN_DIR)/uEnv.scr ::boot.scr
+	mcopy -i $(KDIR_TMP)/$(IMG_PREFIX)-$(PROFILE)-boot.img $(DTS_DIR)/*.dtb ::
+	mcopy -i $(KDIR_TMP)/$(IMG_PREFIX)-$(PROFILE)-boot.img $(BIN_DIR)/$(IMG_PREFIX)-uImage ::uImage
+
+	./gen_axs10x_sdcard_img.sh \
+		$(BIN_DIR)/$(IMG_PREFIX)-$(PROFILE)-sdcard-vfat-$(1).img \
+		$(KDIR_TMP)/$(IMG_PREFIX)-$(PROFILE)-boot.img \
+		$(KDIR)/root.$(1) \
+		$(CONFIG_AXS10X_SD_BOOT_PARTSIZE) \
+		$(CONFIG_TARGET_ROOTFS_PARTSIZE)
+
+ifneq ($(CONFIG_TARGET_IMAGES_GZIP),)
+	gzip -f9n $(BIN_DIR)/$(IMG_PREFIX)-$(PROFILE)-sdcard-vfat-$(1).img
+endif
+endef
+
+define Image/BuildKernel
+	# Build unified uImage
+	$(call Image/BuildKernel/MkuImage, \
+		none, $(KERNEL_LOADADDR),$(call kernel_ep,$(KDIR)/vmlinux.elf) , \
+		$(KDIR)/vmlinux, \
+		$(BIN_DIR)/$(IMG_PREFIX)-uImage \
+	)
+endef
+
+define Image/Build
+	$(call Image/Build/$(1),$(1))
+	$(call Image/Build/SDCard,$(1))
+	dd if=$(KDIR)/root.$(1) of=$(BIN_DIR)/$(IMG_PREFIX)-root.$(1) bs=128k conv=sync
+	$(call Image/Gzip,$(BIN_DIR)/$(IMG_PREFIX)-root.$(1))
+endef
+
+$(eval $(call BuildImage))

target/linux/arc770/image/gen_axs10x_sdcard_img.sh

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+#!/usr/bin/env bash
+
+#
+# Copyright (C) 2016 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+set -x
+[ $# -eq 5 ] || {
+    echo "SYNTAX: $0 <file> <bootfs image> <rootfs image> <bootfs size> <rootfs size>"
+    exit 1
+}
+
+OUTPUT="$1"
+BOOTFS="$2"
+ROOTFS="$3"
+BOOTFSSIZE="$4"
+ROOTFSSIZE="$5"
+
+head=4
+sect=63
+
+set `ptgen -o $OUTPUT -h $head -s $sect -l 1024 -t c -p ${BOOTFSSIZE}M -t 83 -p ${ROOTFSSIZE}M`
+
+BOOTOFFSET="$(($1 / 512))"
+BOOTSIZE="$(($2 / 512))"
+ROOTFSOFFSET="$(($3 / 512))"
+ROOTFSSIZE="$(($4 / 512))"
+
+dd bs=512 if="$BOOTFS" of="$OUTPUT" seek="$BOOTOFFSET" conv=notrunc
+dd bs=512 if="$ROOTFS" of="$OUTPUT" seek="$ROOTFSOFFSET" conv=notrunc

target/linux/arc770/image/uEnv.txt

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+setenv kernel_addr_r 0x82000000
+setenv fdt_addr_r 0x83000000
+setenv loadkernel fatload mmc 0 \${kernel_addr_r} uImage
+setenv loaddtb fatload mmc 0 \${fdt_addr_r} \${dts}
+setenv bootargs earlycon=uart8250,mmio32,0xe0022000,115200n8 console=ttyS3,115200n8 root=/dev/mmcblk0p2 rootwait print-fatal-signals=1
+setenv uenvcmd run loadkernel\; run loaddtb\; bootm \${kernel_addr_r} - \${fdt_addr_r}
+run uenvcmd