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, 212 insertions, 0 deletions

diff --git a/kernel/arch/arm/mach-ux500/cpu-db8500.c b/kernel/arch/arm/mach-ux500/cpu-db8500.c
new file mode 100644
index 000000000..6f63954c8
--- /dev/null
+++ b/kernel/arch/arm/mach-ux500/cpu-db8500.c
@@ -0,0 +1,212 @@
+/*
+ * Copyright (C) 2008-2009 ST-Ericsson SA
+ *
+ * Author: Srinidhi KASAGAR <srinidhi.kasagar@stericsson.com>
+ *
+ * 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/types.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/amba/bus.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/mfd/abx500/ab8500.h>
+#include <linux/mfd/dbx500-prcmu.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/regulator/machine.h>
+#include <linux/random.h>
+
+#include <asm/pmu.h>
+#include <asm/mach/map.h>
+
+#include "setup.h"
+
+#include "board-mop500-regulators.h"
+#include "board-mop500.h"
+#include "db8500-regs.h"
+#include "id.h"
+
+static struct ab8500_platform_data ab8500_platdata = {
+	.regulator	= &ab8500_regulator_plat_data,
+};
+
+static struct prcmu_pdata db8500_prcmu_pdata = {
+	.ab_platdata	= &ab8500_platdata,
+	.version_offset	= DB8500_PRCMU_FW_VERSION_OFFSET,
+	.legacy_offset	= DB8500_PRCMU_LEGACY_OFFSET,
+};
+
+/* minimum static i/o mapping required to boot U8500 platforms */
+static struct map_desc u8500_uart_io_desc[] __initdata = {
+	__IO_DEV_DESC(U8500_UART0_BASE, SZ_4K),
+	__IO_DEV_DESC(U8500_UART2_BASE, SZ_4K),
+};
+/*  U8500 and U9540 common io_desc */
+static struct map_desc u8500_common_io_desc[] __initdata = {
+	/* SCU base also covers GIC CPU BASE and TWD with its 4K page */
+	__IO_DEV_DESC(U8500_SCU_BASE, SZ_4K),
+	__IO_DEV_DESC(U8500_GIC_DIST_BASE, SZ_4K),
+	__IO_DEV_DESC(U8500_L2CC_BASE, SZ_4K),
+	__IO_DEV_DESC(U8500_MTU0_BASE, SZ_4K),
+	__IO_DEV_DESC(U8500_BACKUPRAM0_BASE, SZ_8K),
+
+	__IO_DEV_DESC(U8500_CLKRST1_BASE, SZ_4K),
+	__IO_DEV_DESC(U8500_CLKRST2_BASE, SZ_4K),
+	__IO_DEV_DESC(U8500_CLKRST3_BASE, SZ_4K),
+	__IO_DEV_DESC(U8500_CLKRST5_BASE, SZ_4K),
+	__IO_DEV_DESC(U8500_CLKRST6_BASE, SZ_4K),
+
+	__IO_DEV_DESC(U8500_GPIO0_BASE, SZ_4K),
+	__IO_DEV_DESC(U8500_GPIO1_BASE, SZ_4K),
+	__IO_DEV_DESC(U8500_GPIO2_BASE, SZ_4K),
+	__IO_DEV_DESC(U8500_GPIO3_BASE, SZ_4K),
+};
+
+/* U8500 IO map specific description */
+static struct map_desc u8500_io_desc[] __initdata = {
+	__IO_DEV_DESC(U8500_PRCMU_BASE, SZ_4K),
+	__IO_DEV_DESC(U8500_PRCMU_TCDM_BASE, SZ_4K),
+
+};
+
+/* U9540 IO map specific description */
+static struct map_desc u9540_io_desc[] __initdata = {
+	__IO_DEV_DESC(U8500_PRCMU_BASE, SZ_4K + SZ_8K),
+	__IO_DEV_DESC(U8500_PRCMU_TCDM_BASE, SZ_4K + SZ_8K),
+};
+
+static void __init u8500_map_io(void)
+{
+	/*
+	 * Map the UARTs early so that the DEBUG_LL stuff continues to work.
+	 */
+	iotable_init(u8500_uart_io_desc, ARRAY_SIZE(u8500_uart_io_desc));
+
+	ux500_map_io();
+
+	iotable_init(u8500_common_io_desc, ARRAY_SIZE(u8500_common_io_desc));
+
+	if (cpu_is_ux540_family())
+		iotable_init(u9540_io_desc, ARRAY_SIZE(u9540_io_desc));
+	else
+		iotable_init(u8500_io_desc, ARRAY_SIZE(u8500_io_desc));
+}
+
+/*
+ * The PMU IRQ lines of two cores are wired together into a single interrupt.
+ * Bounce the interrupt to the other core if it's not ours.
+ */
+static irqreturn_t db8500_pmu_handler(int irq, void *dev, irq_handler_t handler)
+{
+	irqreturn_t ret = handler(irq, dev);
+	int other = !smp_processor_id();
+
+	if (ret == IRQ_NONE && cpu_online(other))
+		irq_set_affinity(irq, cpumask_of(other));
+
+	/*
+	 * We should be able to get away with the amount of IRQ_NONEs we give,
+	 * while still having the spurious IRQ detection code kick in if the
+	 * interrupt really starts hitting spuriously.
+	 */
+	return ret;
+}
+
+static struct arm_pmu_platdata db8500_pmu_platdata = {
+	.handle_irq		= db8500_pmu_handler,
+};
+
+static const char *db8500_read_soc_id(void)
+{
+	void __iomem *uid = __io_address(U8500_BB_UID_BASE);
+
+	/* Throw these device-specific numbers into the entropy pool */
+	add_device_randomness(uid, 0x14);
+	return kasprintf(GFP_KERNEL, "%08x%08x%08x%08x%08x",
+			 readl((u32 *)uid+0),
+			 readl((u32 *)uid+1), readl((u32 *)uid+2),
+			 readl((u32 *)uid+3), readl((u32 *)uid+4));
+}
+
+static struct device * __init db8500_soc_device_init(void)
+{
+	const char *soc_id = db8500_read_soc_id();
+
+	return ux500_soc_device_init(soc_id);
+}
+
+static struct of_dev_auxdata u8500_auxdata_lookup[] __initdata = {
+	/* Requires call-back bindings. */
+	OF_DEV_AUXDATA("arm,cortex-a9-pmu", 0, "arm-pmu", &db8500_pmu_platdata),
+	/* Requires DMA bindings. */
+	OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80123000,
+		       "ux500-msp-i2s.0", &msp0_platform_data),
+	OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80124000,
+		       "ux500-msp-i2s.1", &msp1_platform_data),
+	OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80117000,
+		       "ux500-msp-i2s.2", &msp2_platform_data),
+	OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80125000,
+		       "ux500-msp-i2s.3", &msp3_platform_data),
+	/* Requires non-DT:able platform data. */
+	OF_DEV_AUXDATA("stericsson,db8500-prcmu", 0x80157000, "db8500-prcmu",
+			&db8500_prcmu_pdata),
+	OF_DEV_AUXDATA("stericsson,ux500-cryp", 0xa03cb000, "cryp1", NULL),
+	OF_DEV_AUXDATA("stericsson,ux500-hash", 0xa03c2000, "hash1", NULL),
+	OF_DEV_AUXDATA("stericsson,snd-soc-mop500", 0, "snd-soc-mop500.0",
+			NULL),
+	{},
+};
+
+static struct of_dev_auxdata u8540_auxdata_lookup[] __initdata = {
+	OF_DEV_AUXDATA("stericsson,db8500-prcmu", 0x80157000, "db8500-prcmu",
+			&db8500_prcmu_pdata),
+	{},
+};
+
+static const struct of_device_id u8500_local_bus_nodes[] = {
+	/* only create devices below soc node */
+	{ .compatible = "stericsson,db8500", },
+	{ .compatible = "stericsson,db8500-prcmu", },
+	{ .compatible = "simple-bus"},
+	{ },
+};
+
+static void __init u8500_init_machine(void)
+{
+	struct device *parent = db8500_soc_device_init();
+
+	/* automatically probe child nodes of dbx5x0 devices */
+	if (of_machine_is_compatible("st-ericsson,u8540"))
+		of_platform_populate(NULL, u8500_local_bus_nodes,
+				     u8540_auxdata_lookup, parent);
+	else
+		of_platform_populate(NULL, u8500_local_bus_nodes,
+				     u8500_auxdata_lookup, parent);
+}
+
+static const char * stericsson_dt_platform_compat[] = {
+	"st-ericsson,u8500",
+	"st-ericsson,u8540",
+	"st-ericsson,u9500",
+	"st-ericsson,u9540",
+	NULL,
+};
+
+DT_MACHINE_START(U8500_DT, "ST-Ericsson Ux5x0 platform (Device Tree Support)")
+	.smp            = smp_ops(ux500_smp_ops),
+	.map_io		= u8500_map_io,
+	.init_irq	= ux500_init_irq,
+	/* we re-use nomadik timer here */
+	.init_time	= ux500_timer_init,
+	.init_machine	= u8500_init_machine,
+	.init_late	= NULL,
+	.dt_compat      = stericsson_dt_platform_compat,
+	.restart        = ux500_restart,
+MACHINE_END