board: add support for ARC HS Development Kit (HSDK)

Synopsys DesignWare HSDK (which stands for ARC HS
Development Kit) is the latest and greatest development
platform that sports quad-core ARC HS38 in real silicon.

Most noticeable features of the board are:
 * Quad-core ARC HS38 CPU running at 1GHz
 * 4Gb of DDR
 * Built-in Vivante GPU (well supported via open source
   Etnaviv drivers)
 * Built-in Wi-Fi/Bluetooth module (RedPine RS-9113)

And as usual we have:
 * [micro] SD-card slot
 * 2 USB 2.0 ports
 * 1Gbit Ethernet port
 * Built-in Digilent JTAG probe
 * Serial port accessible via micro-USB port

Writing sdcard.img on SDcard creates two partitions:
 * FAT32 with uImage and uboot.env
 * EXT4 with root filesystem

We modify kernel config because in default hsdk kernel config
CONFIG_INITRAMFS_SOURCE parameter is set and when we build
rootfs separately (BR2_TARGET_ROOTFS_INITRAMFS is not set)
error appears. Also we set up CONFIG_ARC_UBOOT_SUPPORT which
enables usage of uboot variables in the boot process.

Signed-off-by: Evgeniy Didin <[email protected]>

Author: EvgeniiDidin

.gitlab-ci.yml

@@ -206,6 +206,7 @@ snps_arc700_axs101_defconfig: *defconfig
 snps_archs38_axs103_defconfig: *defconfig
 snps_archs38_haps_defconfig: *defconfig
 snps_archs38_vdk_defconfig: *defconfig
+snps_hsdk_defconfig: *defconfig
 socrates_cyclone5_defconfig: *defconfig
 stm32f429_disco_defconfig: *defconfig
 stm32f469_disco_defconfig: *defconfig

DEVELOPERS

@@ -146,6 +146,7 @@ F:	package/wf111/
 
 N:	ARC Maintainers <[email protected]>
 F:	arch/Config.in.arc
+F:	board/synopsys
 
 N:	Ariel D'Alessandro <[email protected]>
 F:	package/axfsutils/

board/synopsys/hsdk/genimage.cfg

@@ -0,0 +1,26 @@
+image boot.vfat {
+  vfat {
+    files = {
+      "uboot.env",
+      "uImage"
+    }
+  }
+  size = 100M
+}
+
+image sdcard.img {
+  hdimage {
+  }
+
+  partition boot {
+    partition-type = 0xC
+    bootable = "true"
+    image = "boot.vfat"
+  }
+
+  partition rootfs {
+    partition-type = 0x83
+    image = "rootfs.ext4"
+    size = 1G
+  }
+}

board/synopsys/hsdk/linux.fragment

@@ -0,0 +1,2 @@
+CONFIG_INITRAMFS_SOURCE=
+CONFIG_ARC_UBOOT_SUPPORT=y

board/synopsys/hsdk/post-image.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+BOARD_DIR="$(dirname $0)"
+BOARD_NAME="$(basename ${BOARD_DIR})"
+GENIMAGE_CFG="${BOARD_DIR}/genimage.cfg"
+GENIMAGE_TMP="${BUILD_DIR}/genimage.tmp"
+rm -rf "${GENIMAGE_TMP}"
+
+mv ${BINARIES_DIR}/uboot-env.bin ${BINARIES_DIR}/uboot.env
+
+genimage                           \
+        --rootpath "${TARGET_DIR}"     \
+        --tmppath "${GENIMAGE_TMP}"    \
+        --inputpath "${BINARIES_DIR}"  \
+        --outputpath "${BINARIES_DIR}" \
+        --config "${GENIMAGE_CFG}"
+gzip < ${BINARIES_DIR}/sdcard.img > ${BINARIES_DIR}/sdcard.img.gz
+exit $?

board/synopsys/hsdk/uboot.env.txt

@@ -0,0 +1,9 @@
+baudrate=115200
+bootargs=console=ttyS3,115200n8 root=/dev/mmcblk0p2 rootwait
+bootcmd=fatload mmc 0:1; bootm
+bootdelay=2
+bootfile=uImage
+loadaddr=0x82000000
+stderr=serial0@f0005000
+stdin=serial0@f0005000
+stdout=serial0@f0005000

configs/snps_hsdk_defconfig

@@ -0,0 +1,39 @@
+#Architecture
+BR2_arcle=y
+BR2_archs38=y
+
+#Linux headers
+BR2_KERNEL_HEADERS_4_14=y
+
+#System
+BR2_TARGET_GENERIC_HOSTNAME="hsdk"
+BR2_TARGET_GENERIC_ISSUE="Welcome to the HSDK Platform"
+BR2_SYSTEM_DHCP="eth0"
+
+#Kernel
+BR2_LINUX_KERNEL=y
+BR2_LINUX_KERNEL_CUSTOM_VERSION=y
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.14.4"
+BR2_LINUX_KERNEL_DEFCONFIG="hsdk"
+BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES="board/synopsys/hsdk/linux.fragment"
+
+#Filesystem / image
+BR2_TARGET_ROOTFS_EXT2=y
+BR2_TARGET_ROOTFS_EXT2_4=y
+# BR2_TARGET_ROOTFS_TAR is not set
+BR2_PACKAGE_HOST_DOSFSTOOLS=y
+BR2_PACKAGE_HOST_GENIMAGE=y
+BR2_PACKAGE_HOST_MTOOLS=y
+BR2_ROOTFS_POST_IMAGE_SCRIPT="board/synopsys/hsdk/post-image.sh"
+
+#Bootloader
+BR2_TARGET_UBOOT=y
+BR2_TARGET_UBOOT_BUILD_SYSTEM_KCONFIG=y
+BR2_TARGET_UBOOT_CUSTOM_VERSION=y
+BR2_TARGET_UBOOT_CUSTOM_VERSION_VALUE="2017.11"
+BR2_TARGET_UBOOT_BOARD_DEFCONFIG="hsdk"
+BR2_TARGET_UBOOT_NEEDS_DTC=y
+BR2_TARGET_UBOOT_FORMAT_ELF=y
+BR2_TARGET_UBOOT_ENVIMAGE=y
+BR2_TARGET_UBOOT_ENVIMAGE_SOURCE="board/synopsys/hsdk/uboot.env.txt"
+BR2_TARGET_UBOOT_ENVIMAGE_SIZE="0x4000"