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, 105 insertions, 0 deletions

diff --git a/kernel/arch/mips/ar7/setup.c b/kernel/arch/mips/ar7/setup.c
new file mode 100644
index 000000000..820b7a313
--- /dev/null
+++ b/kernel/arch/mips/ar7/setup.c
@@ -0,0 +1,105 @@
+/*
+ * Carsten Langgaard, carstenl@mips.com
+ * Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.
+ *
+ *  This program is free software; you can distribute it and/or modify it
+ *  under the terms of the GNU General Public License (Version 2) as
+ *  published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ *  for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ */
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/pm.h>
+#include <linux/time.h>
+
+#include <asm/reboot.h>
+#include <asm/mach-ar7/ar7.h>
+#include <asm/mach-ar7/prom.h>
+#include <asm/mach-ar7/gpio.h>
+
+static void ar7_machine_restart(char *command)
+{
+	u32 *softres_reg = ioremap(AR7_REGS_RESET + AR7_RESET_SOFTWARE, 1);
+
+	writel(1, softres_reg);
+}
+
+static void ar7_machine_halt(void)
+{
+	while (1)
+		;
+}
+
+static void ar7_machine_power_off(void)
+{
+	u32 *power_reg = (u32 *)ioremap(AR7_REGS_POWER, 1);
+	u32 power_state = readl(power_reg) | (3 << 30);
+
+	writel(power_state, power_reg);
+	ar7_machine_halt();
+}
+
+const char *get_system_type(void)
+{
+	u16 chip_id = ar7_chip_id();
+	u16 titan_variant_id = titan_chip_id();
+
+	switch (chip_id) {
+	case AR7_CHIP_7100:
+		return "TI AR7 (TNETD7100)";
+	case AR7_CHIP_7200:
+		return "TI AR7 (TNETD7200)";
+	case AR7_CHIP_7300:
+		return "TI AR7 (TNETD7300)";
+	case AR7_CHIP_TITAN:
+		switch (titan_variant_id) {
+		case TITAN_CHIP_1050:
+			return "TI AR7 (TNETV1050)";
+		case TITAN_CHIP_1055:
+			return "TI AR7 (TNETV1055)";
+		case TITAN_CHIP_1056:
+			return "TI AR7 (TNETV1056)";
+		case TITAN_CHIP_1060:
+			return "TI AR7 (TNETV1060)";
+		}
+	default:
+		return "TI AR7 (unknown)";
+	}
+}
+
+static int __init ar7_init_console(void)
+{
+	return 0;
+}
+console_initcall(ar7_init_console);
+
+/*
+ * Initializes basic routines and structures pointers, memory size (as
+ * given by the bios and saves the command line.
+ */
+void __init plat_mem_setup(void)
+{
+	unsigned long io_base;
+
+	_machine_restart = ar7_machine_restart;
+	_machine_halt = ar7_machine_halt;
+	pm_power_off = ar7_machine_power_off;
+
+	io_base = (unsigned long)ioremap(AR7_REGS_BASE, 0x10000);
+	if (!io_base)
+		panic("Can't remap IO base!");
+	set_io_port_base(io_base);
+
+	prom_meminit();
+
+	printk(KERN_INFO "%s, ID: 0x%04x, Revision: 0x%02x\n",
+			get_system_type(), ar7_chip_id(), ar7_chip_rev());
+}