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>

4 files changed, 396 insertions, 0 deletions

diff --git a/kernel/arch/sh/boards/mach-cayman/Makefile b/kernel/arch/sh/boards/mach-cayman/Makefile
new file mode 100644
index 000000000..00fa3eaec
--- /dev/null
+++ b/kernel/arch/sh/boards/mach-cayman/Makefile
@@ -0,0 +1,4 @@
+#
+# Makefile for the Hitachi Cayman specific parts of the kernel
+#
+obj-y := setup.o irq.o panic.o
diff --git a/kernel/arch/sh/boards/mach-cayman/irq.c b/kernel/arch/sh/boards/mach-cayman/irq.c
new file mode 100644
index 000000000..724e8b727
--- /dev/null
+++ b/kernel/arch/sh/boards/mach-cayman/irq.c
@@ -0,0 +1,157 @@
+/*
+ * arch/sh/mach-cayman/irq.c - SH-5 Cayman Interrupt Support
+ *
+ * This file handles the board specific parts of the Cayman interrupt system
+ *
+ * Copyright (C) 2002 Stuart Menefy
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/signal.h>
+#include <cpu/irq.h>
+#include <asm/page.h>
+
+/* Setup for the SMSC FDC37C935 / LAN91C100FD */
+#define SMSC_IRQ         IRQ_IRL1
+
+/* Setup for PCI Bus 2, which transmits interrupts via the EPLD */
+#define PCI2_IRQ         IRQ_IRL3
+
+unsigned long epld_virt;
+
+#define EPLD_BASE        0x04002000
+#define EPLD_STATUS_BASE (epld_virt + 0x10)
+#define EPLD_MASK_BASE   (epld_virt + 0x20)
+
+/* Note the SMSC SuperIO chip and SMSC LAN chip interrupts are all muxed onto
+   the same SH-5 interrupt */
+
+static irqreturn_t cayman_interrupt_smsc(int irq, void *dev_id)
+{
+        printk(KERN_INFO "CAYMAN: spurious SMSC interrupt\n");
+	return IRQ_NONE;
+}
+
+static irqreturn_t cayman_interrupt_pci2(int irq, void *dev_id)
+{
+        printk(KERN_INFO "CAYMAN: spurious PCI interrupt, IRQ %d\n", irq);
+	return IRQ_NONE;
+}
+
+static struct irqaction cayman_action_smsc = {
+	.name		= "Cayman SMSC Mux",
+	.handler	= cayman_interrupt_smsc,
+};
+
+static struct irqaction cayman_action_pci2 = {
+	.name		= "Cayman PCI2 Mux",
+	.handler	= cayman_interrupt_pci2,
+};
+
+static void enable_cayman_irq(struct irq_data *data)
+{
+	unsigned int irq = data->irq;
+	unsigned long flags;
+	unsigned long mask;
+	unsigned int reg;
+	unsigned char bit;
+
+	irq -= START_EXT_IRQS;
+	reg = EPLD_MASK_BASE + ((irq / 8) << 2);
+	bit = 1<<(irq % 8);
+	local_irq_save(flags);
+	mask = __raw_readl(reg);
+	mask |= bit;
+	__raw_writel(mask, reg);
+	local_irq_restore(flags);
+}
+
+static void disable_cayman_irq(struct irq_data *data)
+{
+	unsigned int irq = data->irq;
+	unsigned long flags;
+	unsigned long mask;
+	unsigned int reg;
+	unsigned char bit;
+
+	irq -= START_EXT_IRQS;
+	reg = EPLD_MASK_BASE + ((irq / 8) << 2);
+	bit = 1<<(irq % 8);
+	local_irq_save(flags);
+	mask = __raw_readl(reg);
+	mask &= ~bit;
+	__raw_writel(mask, reg);
+	local_irq_restore(flags);
+}
+
+struct irq_chip cayman_irq_type = {
+	.name		= "Cayman-IRQ",
+	.irq_unmask	= enable_cayman_irq,
+	.irq_mask	= disable_cayman_irq,
+};
+
+int cayman_irq_demux(int evt)
+{
+	int irq = intc_evt_to_irq[evt];
+
+	if (irq == SMSC_IRQ) {
+		unsigned long status;
+		int i;
+
+		status = __raw_readl(EPLD_STATUS_BASE) &
+			 __raw_readl(EPLD_MASK_BASE) & 0xff;
+		if (status == 0) {
+			irq = -1;
+		} else {
+			for (i=0; i<8; i++) {
+				if (status & (1<<i))
+					break;
+			}
+			irq = START_EXT_IRQS + i;
+		}
+	}
+
+	if (irq == PCI2_IRQ) {
+		unsigned long status;
+		int i;
+
+		status = __raw_readl(EPLD_STATUS_BASE + 3 * sizeof(u32)) &
+			 __raw_readl(EPLD_MASK_BASE + 3 * sizeof(u32)) & 0xff;
+		if (status == 0) {
+			irq = -1;
+		} else {
+			for (i=0; i<8; i++) {
+				if (status & (1<<i))
+					break;
+			}
+			irq = START_EXT_IRQS + (3 * 8) + i;
+		}
+	}
+
+	return irq;
+}
+
+void init_cayman_irq(void)
+{
+	int i;
+
+	epld_virt = (unsigned long)ioremap_nocache(EPLD_BASE, 1024);
+	if (!epld_virt) {
+		printk(KERN_ERR "Cayman IRQ: Unable to remap EPLD\n");
+		return;
+	}
+
+	for (i = 0; i < NR_EXT_IRQS; i++) {
+		irq_set_chip_and_handler(START_EXT_IRQS + i,
+					 &cayman_irq_type, handle_level_irq);
+	}
+
+	/* Setup the SMSC interrupt */
+	setup_irq(SMSC_IRQ, &cayman_action_smsc);
+	setup_irq(PCI2_IRQ, &cayman_action_pci2);
+}
diff --git a/kernel/arch/sh/boards/mach-cayman/panic.c b/kernel/arch/sh/boards/mach-cayman/panic.c
new file mode 100644
index 000000000..d1e67306d
--- /dev/null
+++ b/kernel/arch/sh/boards/mach-cayman/panic.c
@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2003  Richard Curnow, SuperH UK Limited
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/io.h>
+#include <cpu/registers.h>
+
+/* THIS IS A PHYSICAL ADDRESS */
+#define HDSP2534_ADDR (0x04002100)
+
+static void poor_mans_delay(void)
+{
+	int i;
+
+	for (i = 0; i < 2500000; i++)
+		cpu_relax();
+}
+
+static void show_value(unsigned long x)
+{
+	int i;
+	unsigned nibble;
+	for (i = 0; i < 8; i++) {
+		nibble = ((x >> (i * 4)) & 0xf);
+
+		__raw_writeb(nibble + ((nibble > 9) ? 55 : 48),
+			  HDSP2534_ADDR + 0xe0 + ((7 - i) << 2));
+	}
+}
+
+void
+panic_handler(unsigned long panicPC, unsigned long panicSSR,
+	      unsigned long panicEXPEVT)
+{
+	while (1) {
+		/* This piece of code displays the PC on the LED display */
+		show_value(panicPC);
+		poor_mans_delay();
+		show_value(panicSSR);
+		poor_mans_delay();
+		show_value(panicEXPEVT);
+		poor_mans_delay();
+	}
+}
diff --git a/kernel/arch/sh/boards/mach-cayman/setup.c b/kernel/arch/sh/boards/mach-cayman/setup.c
new file mode 100644
index 000000000..340fd40b3
--- /dev/null
+++ b/kernel/arch/sh/boards/mach-cayman/setup.c
@@ -0,0 +1,186 @@
+/*
+ * arch/sh/mach-cayman/setup.c
+ *
+ * SH5 Cayman support
+ *
+ * Copyright (C) 2002  David J. Mckay & Benedict Gaster
+ * Copyright (C) 2003 - 2007  Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <cpu/irq.h>
+
+/*
+ * Platform Dependent Interrupt Priorities.
+ */
+
+/* Using defaults defined in irq.h */
+#define	RES NO_PRIORITY		/* Disabled */
+#define IR0 IRL0_PRIORITY	/* IRLs */
+#define IR1 IRL1_PRIORITY
+#define IR2 IRL2_PRIORITY
+#define IR3 IRL3_PRIORITY
+#define PCA INTA_PRIORITY	/* PCI Ints */
+#define PCB INTB_PRIORITY
+#define PCC INTC_PRIORITY
+#define PCD INTD_PRIORITY
+#define SER TOP_PRIORITY
+#define ERR TOP_PRIORITY
+#define PW0 TOP_PRIORITY
+#define PW1 TOP_PRIORITY
+#define PW2 TOP_PRIORITY
+#define PW3 TOP_PRIORITY
+#define DM0 NO_PRIORITY		/* DMA Ints */
+#define DM1 NO_PRIORITY
+#define DM2 NO_PRIORITY
+#define DM3 NO_PRIORITY
+#define DAE NO_PRIORITY
+#define TU0 TIMER_PRIORITY	/* TMU Ints */
+#define TU1 NO_PRIORITY
+#define TU2 NO_PRIORITY
+#define TI2 NO_PRIORITY
+#define ATI NO_PRIORITY		/* RTC Ints */
+#define PRI NO_PRIORITY
+#define CUI RTC_PRIORITY
+#define ERI SCIF_PRIORITY	/* SCIF Ints */
+#define RXI SCIF_PRIORITY
+#define BRI SCIF_PRIORITY
+#define TXI SCIF_PRIORITY
+#define ITI TOP_PRIORITY	/* WDT Ints */
+
+/* Setup for the SMSC FDC37C935 */
+#define SMSC_SUPERIO_BASE	0x04000000
+#define SMSC_CONFIG_PORT_ADDR	0x3f0
+#define SMSC_INDEX_PORT_ADDR	SMSC_CONFIG_PORT_ADDR
+#define SMSC_DATA_PORT_ADDR	0x3f1
+
+#define SMSC_ENTER_CONFIG_KEY	0x55
+#define SMSC_EXIT_CONFIG_KEY	0xaa
+
+#define SMCS_LOGICAL_DEV_INDEX	0x07
+#define SMSC_DEVICE_ID_INDEX	0x20
+#define SMSC_DEVICE_REV_INDEX	0x21
+#define SMSC_ACTIVATE_INDEX	0x30
+#define SMSC_PRIMARY_BASE_INDEX  0x60
+#define SMSC_SECONDARY_BASE_INDEX 0x62
+#define SMSC_PRIMARY_INT_INDEX	0x70
+#define SMSC_SECONDARY_INT_INDEX 0x72
+
+#define SMSC_IDE1_DEVICE	1
+#define SMSC_KEYBOARD_DEVICE	7
+#define SMSC_CONFIG_REGISTERS	8
+
+#define SMSC_SUPERIO_READ_INDEXED(index) ({ \
+	outb((index), SMSC_INDEX_PORT_ADDR); \
+	inb(SMSC_DATA_PORT_ADDR); })
+#define SMSC_SUPERIO_WRITE_INDEXED(val, index) ({ \
+	outb((index), SMSC_INDEX_PORT_ADDR); \
+	outb((val),   SMSC_DATA_PORT_ADDR); })
+
+#define IDE1_PRIMARY_BASE	0x01f0
+#define IDE1_SECONDARY_BASE	0x03f6
+
+unsigned long smsc_superio_virt;
+
+int platform_int_priority[NR_INTC_IRQS] = {
+	IR0, IR1, IR2, IR3, PCA, PCB, PCC, PCD,	/* IRQ  0- 7 */
+	RES, RES, RES, RES, SER, ERR, PW3, PW2,	/* IRQ  8-15 */
+	PW1, PW0, DM0, DM1, DM2, DM3, DAE, RES,	/* IRQ 16-23 */
+	RES, RES, RES, RES, RES, RES, RES, RES,	/* IRQ 24-31 */
+	TU0, TU1, TU2, TI2, ATI, PRI, CUI, ERI,	/* IRQ 32-39 */
+	RXI, BRI, TXI, RES, RES, RES, RES, RES,	/* IRQ 40-47 */
+	RES, RES, RES, RES, RES, RES, RES, RES,	/* IRQ 48-55 */
+	RES, RES, RES, RES, RES, RES, RES, ITI,	/* IRQ 56-63 */
+};
+
+static int __init smsc_superio_setup(void)
+{
+	unsigned char devid, devrev;
+
+	smsc_superio_virt = (unsigned long)ioremap_nocache(SMSC_SUPERIO_BASE, 1024);
+	if (!smsc_superio_virt) {
+		panic("Unable to remap SMSC SuperIO\n");
+	}
+
+	/* Initially the chip is in run state */
+	/* Put it into configuration state */
+	outb(SMSC_ENTER_CONFIG_KEY, SMSC_CONFIG_PORT_ADDR);
+	outb(SMSC_ENTER_CONFIG_KEY, SMSC_CONFIG_PORT_ADDR);
+
+	/* Read device ID info */
+	devid = SMSC_SUPERIO_READ_INDEXED(SMSC_DEVICE_ID_INDEX);
+	devrev = SMSC_SUPERIO_READ_INDEXED(SMSC_DEVICE_REV_INDEX);
+	printk("SMSC SuperIO devid %02x rev %02x\n", devid, devrev);
+
+	/* Select the keyboard device */
+	SMSC_SUPERIO_WRITE_INDEXED(SMSC_KEYBOARD_DEVICE, SMCS_LOGICAL_DEV_INDEX);
+
+	/* enable it */
+	SMSC_SUPERIO_WRITE_INDEXED(1, SMSC_ACTIVATE_INDEX);
+
+	/* Select the interrupts */
+	/* On a PC keyboard is IRQ1, mouse is IRQ12 */
+	SMSC_SUPERIO_WRITE_INDEXED(1, SMSC_PRIMARY_INT_INDEX);
+	SMSC_SUPERIO_WRITE_INDEXED(12, SMSC_SECONDARY_INT_INDEX);
+
+#ifdef CONFIG_IDE
+	/*
+	 * Only IDE1 exists on the Cayman
+	 */
+
+	/* Power it on */
+	SMSC_SUPERIO_WRITE_INDEXED(1 << SMSC_IDE1_DEVICE, 0x22);
+
+	SMSC_SUPERIO_WRITE_INDEXED(SMSC_IDE1_DEVICE, SMCS_LOGICAL_DEV_INDEX);
+	SMSC_SUPERIO_WRITE_INDEXED(1, SMSC_ACTIVATE_INDEX);
+
+	SMSC_SUPERIO_WRITE_INDEXED(IDE1_PRIMARY_BASE >> 8,
+				   SMSC_PRIMARY_BASE_INDEX + 0);
+	SMSC_SUPERIO_WRITE_INDEXED(IDE1_PRIMARY_BASE & 0xff,
+				   SMSC_PRIMARY_BASE_INDEX + 1);
+
+	SMSC_SUPERIO_WRITE_INDEXED(IDE1_SECONDARY_BASE >> 8,
+				   SMSC_SECONDARY_BASE_INDEX + 0);
+	SMSC_SUPERIO_WRITE_INDEXED(IDE1_SECONDARY_BASE & 0xff,
+				   SMSC_SECONDARY_BASE_INDEX + 1);
+
+	SMSC_SUPERIO_WRITE_INDEXED(14, SMSC_PRIMARY_INT_INDEX);
+
+	SMSC_SUPERIO_WRITE_INDEXED(SMSC_CONFIG_REGISTERS,
+				   SMCS_LOGICAL_DEV_INDEX);
+
+	SMSC_SUPERIO_WRITE_INDEXED(0x00, 0xc2); /* GP42 = nIDE1_OE */
+	SMSC_SUPERIO_WRITE_INDEXED(0x01, 0xc5); /* GP45 = IDE1_IRQ */
+	SMSC_SUPERIO_WRITE_INDEXED(0x00, 0xc6); /* GP46 = nIOROP */
+	SMSC_SUPERIO_WRITE_INDEXED(0x00, 0xc7); /* GP47 = nIOWOP */
+#endif
+
+	/* Exit the configuration state */
+	outb(SMSC_EXIT_CONFIG_KEY, SMSC_CONFIG_PORT_ADDR);
+
+	return 0;
+}
+device_initcall(smsc_superio_setup);
+
+static void __iomem *cayman_ioport_map(unsigned long port, unsigned int len)
+{
+	if (port < 0x400) {
+		extern unsigned long smsc_superio_virt;
+		return (void __iomem *)((port << 2) | smsc_superio_virt);
+	}
+
+	return (void __iomem *)port;
+}
+
+extern void init_cayman_irq(void);
+
+static struct sh_machine_vector mv_cayman __initmv = {
+	.mv_name		= "Hitachi Cayman",
+	.mv_ioport_map		= cayman_ioport_map,
+	.mv_init_irq		= init_cayman_irq,
+};