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, 181 insertions, 0 deletions

diff --git a/kernel/arch/arm/mach-s3c24xx/s3c2412.c b/kernel/arch/arm/mach-s3c24xx/s3c2412.c
new file mode 100644
index 000000000..64a13605c
--- /dev/null
+++ b/kernel/arch/arm/mach-s3c24xx/s3c2412.c
@@ -0,0 +1,181 @@
+/*
+ * Copyright (c) 2006 Simtec Electronics
+ *	Ben Dooks <ben@simtec.co.uk>
+ *
+ * http://armlinux.simtec.co.uk/.
+ *
+ * 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.
+*/
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <linux/timer.h>
+#include <linux/init.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/syscore_ops.h>
+#include <linux/serial_core.h>
+#include <linux/serial_s3c.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/reboot.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/mach/irq.h>
+
+#include <asm/proc-fns.h>
+#include <asm/irq.h>
+#include <asm/system_misc.h>
+
+#include <mach/hardware.h>
+#include <mach/regs-clock.h>
+#include <mach/regs-gpio.h>
+
+#include <plat/cpu.h>
+#include <plat/cpu-freq.h>
+#include <plat/devs.h>
+#include <plat/nand-core.h>
+#include <plat/pm.h>
+#include <plat/regs-spi.h>
+
+#include "common.h"
+#include "regs-dsc.h"
+#include "s3c2412-power.h"
+
+#ifndef CONFIG_CPU_S3C2412_ONLY
+void __iomem *s3c24xx_va_gpio2 = S3C24XX_VA_GPIO;
+
+static inline void s3c2412_init_gpio2(void)
+{
+	s3c24xx_va_gpio2 = S3C24XX_VA_GPIO + 0x10;
+}
+#else
+#define s3c2412_init_gpio2() do { } while(0)
+#endif
+
+/* Initial IO mappings */
+
+static struct map_desc s3c2412_iodesc[] __initdata = {
+	IODESC_ENT(CLKPWR),
+	IODESC_ENT(TIMER),
+	IODESC_ENT(WATCHDOG),
+	{
+		.virtual = (unsigned long)S3C2412_VA_SSMC,
+		.pfn	 = __phys_to_pfn(S3C2412_PA_SSMC),
+		.length	 = SZ_1M,
+		.type	 = MT_DEVICE,
+	},
+	{
+		.virtual = (unsigned long)S3C2412_VA_EBI,
+		.pfn	 = __phys_to_pfn(S3C2412_PA_EBI),
+		.length	 = SZ_1M,
+		.type	 = MT_DEVICE,
+	},
+};
+
+/* uart registration process */
+
+void __init s3c2412_init_uarts(struct s3c2410_uartcfg *cfg, int no)
+{
+	s3c24xx_init_uartdevs("s3c2412-uart", s3c2410_uart_resources, cfg, no);
+
+	/* rename devices that are s3c2412/s3c2413 specific */
+	s3c_device_sdi.name  = "s3c2412-sdi";
+	s3c_device_lcd.name  = "s3c2412-lcd";
+	s3c_nand_setname("s3c2412-nand");
+
+	/* alter IRQ of SDI controller */
+
+	s3c_device_sdi.resource[1].start = IRQ_S3C2412_SDI;
+	s3c_device_sdi.resource[1].end   = IRQ_S3C2412_SDI;
+
+	/* spi channel related changes, s3c2412/13 specific */
+	s3c_device_spi0.name = "s3c2412-spi";
+	s3c_device_spi0.resource[0].end = S3C24XX_PA_SPI + 0x24;
+	s3c_device_spi1.name = "s3c2412-spi";
+	s3c_device_spi1.resource[0].start = S3C24XX_PA_SPI + S3C2412_SPI1;
+	s3c_device_spi1.resource[0].end = S3C24XX_PA_SPI + S3C2412_SPI1 + 0x24;
+
+}
+
+/* s3c2412_idle
+ *
+ * use the standard idle call by ensuring the idle mode
+ * in power config, then issuing the idle co-processor
+ * instruction
+*/
+
+static void s3c2412_idle(void)
+{
+	unsigned long tmp;
+
+	/* ensure our idle mode is to go to idle */
+
+	tmp = __raw_readl(S3C2412_PWRCFG);
+	tmp &= ~S3C2412_PWRCFG_STANDBYWFI_MASK;
+	tmp |= S3C2412_PWRCFG_STANDBYWFI_IDLE;
+	__raw_writel(tmp, S3C2412_PWRCFG);
+
+	cpu_do_idle();
+}
+
+/* s3c2412_map_io
+ *
+ * register the standard cpu IO areas, and any passed in from the
+ * machine specific initialisation.
+*/
+
+void __init s3c2412_map_io(void)
+{
+	/* move base of IO */
+
+	s3c2412_init_gpio2();
+
+	/* set our idle function */
+
+	arm_pm_idle = s3c2412_idle;
+
+	/* register our io-tables */
+
+	iotable_init(s3c2412_iodesc, ARRAY_SIZE(s3c2412_iodesc));
+}
+
+/* need to register the subsystem before we actually register the device, and
+ * we also need to ensure that it has been initialised before any of the
+ * drivers even try to use it (even if not on an s3c2412 based system)
+ * as a driver which may support both 2410 and 2440 may try and use it.
+*/
+
+struct bus_type s3c2412_subsys = {
+	.name = "s3c2412-core",
+	.dev_name = "s3c2412-core",
+};
+
+static int __init s3c2412_core_init(void)
+{
+	return subsys_system_register(&s3c2412_subsys, NULL);
+}
+
+core_initcall(s3c2412_core_init);
+
+static struct device s3c2412_dev = {
+	.bus		= &s3c2412_subsys,
+};
+
+int __init s3c2412_init(void)
+{
+	printk("S3C2412: Initialising architecture\n");
+
+#ifdef CONFIG_PM_SLEEP
+	register_syscore_ops(&s3c2412_pm_syscore_ops);
+	register_syscore_ops(&s3c24xx_irq_syscore_ops);
+#endif
+
+	return device_register(&s3c2412_dev);
+}