Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 101 insertions, 0 deletions

diff --git a/kernel/arch/mips/ralink/of.c b/kernel/arch/mips/ralink/of.c
new file mode 100644
index 000000000..0d30dcd63
--- /dev/null
+++ b/kernel/arch/mips/ralink/of.c
@@ -0,0 +1,101 @@
+/*
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ *
+ * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
+ * Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
+ * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
+ */
+
+#include <linux/io.h>
+#include <linux/clk.h>
+#include <linux/init.h>
+#include <linux/sizes.h>
+#include <linux/of_fdt.h>
+#include <linux/kernel.h>
+#include <linux/bootmem.h>
+#include <linux/of_platform.h>
+#include <linux/of_address.h>
+
+#include <asm/reboot.h>
+#include <asm/bootinfo.h>
+#include <asm/addrspace.h>
+#include <asm/prom.h>
+
+#include "common.h"
+
+__iomem void *rt_sysc_membase;
+__iomem void *rt_memc_membase;
+
+__iomem void *plat_of_remap_node(const char *node)
+{
+	struct resource res;
+	struct device_node *np;
+
+	np = of_find_compatible_node(NULL, NULL, node);
+	if (!np)
+		panic("Failed to find %s node", node);
+
+	if (of_address_to_resource(np, 0, &res))
+		panic("Failed to get resource for %s", node);
+
+	if ((request_mem_region(res.start,
+				resource_size(&res),
+				res.name) < 0))
+		panic("Failed to request resources for %s", node);
+
+	return ioremap_nocache(res.start, resource_size(&res));
+}
+
+void __init device_tree_init(void)
+{
+	unflatten_and_copy_device_tree();
+}
+
+static int memory_dtb;
+
+static int __init early_init_dt_find_memory(unsigned long node,
+				const char *uname, int depth, void *data)
+{
+	if (depth == 1 && !strcmp(uname, "memory@0"))
+		memory_dtb = 1;
+
+	return 0;
+}
+
+void __init plat_mem_setup(void)
+{
+	set_io_port_base(KSEG1);
+
+	/*
+	 * Load the builtin devicetree. This causes the chosen node to be
+	 * parsed resulting in our memory appearing
+	 */
+	__dt_setup_arch(__dtb_start);
+
+	strlcpy(arcs_cmdline, boot_command_line, COMMAND_LINE_SIZE);
+
+	of_scan_flat_dt(early_init_dt_find_memory, NULL);
+	if (memory_dtb)
+		of_scan_flat_dt(early_init_dt_scan_memory, NULL);
+	else if (soc_info.mem_size)
+		add_memory_region(soc_info.mem_base, soc_info.mem_size * SZ_1M,
+				  BOOT_MEM_RAM);
+	else
+		detect_memory_region(soc_info.mem_base,
+				     soc_info.mem_size_min * SZ_1M,
+				     soc_info.mem_size_max * SZ_1M);
+}
+
+static int __init plat_of_setup(void)
+{
+	__dt_register_buses(soc_info.compatible, "palmbus");
+
+	/* make sure that the reset controller is setup early */
+	ralink_rst_init();
+
+	return 0;
+}
+
+arch_initcall(plat_of_setup);