arc: Adding EM9D SOC

EM9D is a ARC CPU configuration that can be selected for the
ARC EM Starter Kit. The board support for this board will be
submitted separately to expidite review.

Change-Id: I2c85bdab6ea7bfb257e94e4c72b11b4568dbac19
Signed-off-by: Chuck Jordan <cjordan@synopsys.com>

arch/arc/soc/em9d/soc_config.c

@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2016 Synopsys, Inc. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <device.h>
+#include <init.h>
+#include "soc.h"
+
+
+#ifdef CONFIG_UART_NS16550
+
+static int uart_ns16550_init(struct device *dev)
+{
+	ARG_UNUSED(dev);
+
+	/* On ARC EM Starter kit board,
+	 * send the UART the command to clear the interrupt
+	 */
+#ifdef CONFIG_UART_NS16550_PORT_0
+	sys_write32(0, UART_NS16550_PORT_0_BASE_ADDR+0x4);
+	sys_write32(0, UART_NS16550_PORT_0_BASE_ADDR+0x10);
+#endif /* CONFIG_UART_NS16550_PORT_0 */
+#ifdef CONFIG_UART_NS16550_PORT_1
+	sys_write32(0, UART_NS16550_PORT_1_BASE_ADDR+0x4);
+	sys_write32(0, UART_NS16550_PORT_1_BASE_ADDR+0x10);
+#endif /* CONFIG_UART_NS16550_PORT_1 */
+
+	return 0;
+}
+
+SYS_INIT(uart_ns16550_init, PRIMARY, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
+
+#endif /* CONFIG_UART_NS16550 */