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, 145 insertions, 0 deletions

diff --git a/kernel/arch/sh/boards/mach-se/7724/irq.c b/kernel/arch/sh/boards/mach-se/7724/irq.c
new file mode 100644
index 000000000..5d1d3ec9a
--- /dev/null
+++ b/kernel/arch/sh/boards/mach-se/7724/irq.c
@@ -0,0 +1,145 @@
+/*
+ * linux/arch/sh/boards/se/7724/irq.c
+ *
+ * Copyright (C) 2009 Renesas Solutions Corp.
+ *
+ * Kuninori Morimoto <morimoto.kuninori@renesas.com>
+ *
+ * Based on  linux/arch/sh/boards/se/7722/irq.c
+ * Copyright (C) 2007  Nobuhiro Iwamatsu
+ *
+ * Hitachi UL SolutionEngine 7724 Support.
+ *
+ * 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/irq.h>
+#include <linux/interrupt.h>
+#include <linux/export.h>
+#include <linux/topology.h>
+#include <linux/io.h>
+#include <linux/err.h>
+#include <mach-se/mach/se7724.h>
+
+struct fpga_irq {
+	unsigned long  sraddr;
+	unsigned long  mraddr;
+	unsigned short mask;
+	unsigned int   base;
+};
+
+static unsigned int fpga2irq(unsigned int irq)
+{
+	if (irq >= IRQ0_BASE &&
+	    irq <= IRQ0_END)
+		return IRQ0_IRQ;
+	else if (irq >= IRQ1_BASE &&
+		 irq <= IRQ1_END)
+		return IRQ1_IRQ;
+	else
+		return IRQ2_IRQ;
+}
+
+static struct fpga_irq get_fpga_irq(unsigned int irq)
+{
+	struct fpga_irq set;
+
+	switch (irq) {
+	case IRQ0_IRQ:
+		set.sraddr = IRQ0_SR;
+		set.mraddr = IRQ0_MR;
+		set.mask   = IRQ0_MASK;
+		set.base   = IRQ0_BASE;
+		break;
+	case IRQ1_IRQ:
+		set.sraddr = IRQ1_SR;
+		set.mraddr = IRQ1_MR;
+		set.mask   = IRQ1_MASK;
+		set.base   = IRQ1_BASE;
+		break;
+	default:
+		set.sraddr = IRQ2_SR;
+		set.mraddr = IRQ2_MR;
+		set.mask   = IRQ2_MASK;
+		set.base   = IRQ2_BASE;
+		break;
+	}
+
+	return set;
+}
+
+static void disable_se7724_irq(struct irq_data *data)
+{
+	unsigned int irq = data->irq;
+	struct fpga_irq set = get_fpga_irq(fpga2irq(irq));
+	unsigned int bit = irq - set.base;
+	__raw_writew(__raw_readw(set.mraddr) | 0x0001 << bit, set.mraddr);
+}
+
+static void enable_se7724_irq(struct irq_data *data)
+{
+	unsigned int irq = data->irq;
+	struct fpga_irq set = get_fpga_irq(fpga2irq(irq));
+	unsigned int bit = irq - set.base;
+	__raw_writew(__raw_readw(set.mraddr) & ~(0x0001 << bit), set.mraddr);
+}
+
+static struct irq_chip se7724_irq_chip __read_mostly = {
+	.name		= "SE7724-FPGA",
+	.irq_mask	= disable_se7724_irq,
+	.irq_unmask	= enable_se7724_irq,
+};
+
+static void se7724_irq_demux(unsigned int irq, struct irq_desc *desc)
+{
+	struct fpga_irq set = get_fpga_irq(irq);
+	unsigned short intv = __raw_readw(set.sraddr);
+	unsigned int ext_irq = set.base;
+
+	intv &= set.mask;
+
+	for (; intv; intv >>= 1, ext_irq++) {
+		if (!(intv & 1))
+			continue;
+
+		generic_handle_irq(ext_irq);
+	}
+}
+
+/*
+ * Initialize IRQ setting
+ */
+void __init init_se7724_IRQ(void)
+{
+	int irq_base, i;
+
+	__raw_writew(0xffff, IRQ0_MR);  /* mask all */
+	__raw_writew(0xffff, IRQ1_MR);  /* mask all */
+	__raw_writew(0xffff, IRQ2_MR);  /* mask all */
+	__raw_writew(0x0000, IRQ0_SR);  /* clear irq */
+	__raw_writew(0x0000, IRQ1_SR);  /* clear irq */
+	__raw_writew(0x0000, IRQ2_SR);  /* clear irq */
+	__raw_writew(0x002a, IRQ_MODE); /* set irq type */
+
+	irq_base = irq_alloc_descs(SE7724_FPGA_IRQ_BASE, SE7724_FPGA_IRQ_BASE,
+				   SE7724_FPGA_IRQ_NR, numa_node_id());
+	if (IS_ERR_VALUE(irq_base)) {
+		pr_err("%s: failed hooking irqs for FPGA\n", __func__);
+		return;
+	}
+
+	for (i = 0; i < SE7724_FPGA_IRQ_NR; i++)
+		irq_set_chip_and_handler_name(irq_base + i, &se7724_irq_chip,
+					      handle_level_irq, "level");
+
+	irq_set_chained_handler(IRQ0_IRQ, se7724_irq_demux);
+	irq_set_irq_type(IRQ0_IRQ, IRQ_TYPE_LEVEL_LOW);
+
+	irq_set_chained_handler(IRQ1_IRQ, se7724_irq_demux);
+	irq_set_irq_type(IRQ1_IRQ, IRQ_TYPE_LEVEL_LOW);
+
+	irq_set_chained_handler(IRQ2_IRQ, se7724_irq_demux);
+	irq_set_irq_type(IRQ2_IRQ, IRQ_TYPE_LEVEL_LOW);
+}