linux: add support of Synopsys ARC770-based boards

This patch introduces support of new boards with ARC cores.

 [1] Synopsys SDP board
     This is a new-generation development board from Synopsys that
     consists of base-board and CPU tile-board (which might have a real
     ASIC or FPGA with CPU image).
     It sports a lot of DesignWare peripherals like GMAC, USB, SPI, I2C
     etc and is intended to be used for early development of ARC-based
     products.

 [2] nSIM
     This is a virtual board implemented in Synopsys proprietary
     software simulator (even though available for free for open source
     community). This board has only serial port as a peripheral and so
     it is meant to be used for runtime testing which is especially
     useful during bring-up of new tools and platforms.
     What's also important ARC cores are very configurable so there're
     many variations of options like cache sizes, their line lengths,
     additional hardware blocks like multipliers, dividers etc. And this
     board could be used to make sure built software still runs on
     different HW configurations.

Cc: Felix Fietkau <nbd@openwrt.org>
Cc: Jo-Philipp Wich <jow@openwrt.org>
Cc: Jonas Gorski <jogo@openwrt.org>
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>

SVN-Revision: 47589

1 files changed, 40 insertions, 0 deletions

diff --git a/target/linux/arc770/image/Makefile b/target/linux/arc770/image/Makefile
new file mode 100644
index 0000000000..c033102d51
--- /dev/null
+++ b/target/linux/arc770/image/Makefile
@@ -0,0 +1,40 @@
+#
+# Copyright (C) 2015 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
+
+define Build/patch-dtb
+	$(call Image/BuildDTB,../dts/$(DEVICE_DTS).dts,$@.dtb)
+	$(STAGING_DIR_HOST)/bin/patch-dtb $@ $@.dtb
+endef
+
+# Shared device definition: applies to every defined device
+define Device/Default
+  PROFILES = Default $$(DEVICE_PROFILE)
+  KERNEL_SUFFIX := .elf
+  KERNEL_INITRAMFS := kernel-bin | patch-dtb
+  KERNEL_INITRAMFS_NAME = $$(KERNEL_NAME)-initramfs.elf
+  DEVICE_PROFILE :=
+  DEVICE_DTS :=
+endef
+DEVICE_VARS += DEVICE_PROFILE DEVICE_DTS
+
+define add_arc770
+  define Device/$(1)
+    DEVICE_PROFILE := $(1)
+    DEVICE_DTS := $(1)
+  endef
+  TARGET_DEVICES += $(1)
+endef
+
+# DesignWare AXS101
+$(eval $(call add_arc770,axs101))
+
+# nSIM with ARC770
+$(eval $(call add_arc770,nsim_700))
+
+$(eval $(call BuildImage))