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, 195 insertions, 0 deletions

diff --git a/kernel/arch/arm/mach-netx/generic.c b/kernel/arch/arm/mach-netx/generic.c
new file mode 100644
index 000000000..db25b0cef
--- /dev/null
+++ b/kernel/arch/arm/mach-netx/generic.c
@@ -0,0 +1,195 @@
+/*
+ * arch/arm/mach-netx/generic.c
+ *
+ * Copyright (C) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that 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/device.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/irqchip/arm-vic.h>
+#include <linux/reboot.h>
+#include <mach/hardware.h>
+#include <asm/mach/map.h>
+#include <mach/netx-regs.h>
+#include <asm/mach/irq.h>
+
+static struct map_desc netx_io_desc[] __initdata = {
+	{
+		.virtual        = NETX_IO_VIRT,
+		.pfn            = __phys_to_pfn(NETX_IO_PHYS),
+		.length         = NETX_IO_SIZE,
+		.type           = MT_DEVICE
+	}
+};
+
+void __init netx_map_io(void)
+{
+	iotable_init(netx_io_desc, ARRAY_SIZE(netx_io_desc));
+}
+
+static struct resource netx_rtc_resources[] = {
+	[0] = {
+		.start	= 0x00101200,
+		.end	= 0x00101220,
+		.flags	= IORESOURCE_MEM,
+	},
+};
+
+static struct platform_device netx_rtc_device = {
+	.name		= "netx-rtc",
+	.id		= 0,
+	.num_resources	= ARRAY_SIZE(netx_rtc_resources),
+	.resource	= netx_rtc_resources,
+};
+
+static struct platform_device *devices[] __initdata = {
+	&netx_rtc_device,
+};
+
+#if 0
+#define DEBUG_IRQ(fmt...)	printk(fmt)
+#else
+#define DEBUG_IRQ(fmt...)	while (0) {}
+#endif
+
+static void
+netx_hif_demux_handler(unsigned int irq_unused, struct irq_desc *desc)
+{
+	unsigned int irq = NETX_IRQ_HIF_CHAINED(0);
+	unsigned int stat;
+
+	stat = ((readl(NETX_DPMAS_INT_EN) &
+		readl(NETX_DPMAS_INT_STAT)) >> 24) & 0x1f;
+
+	while (stat) {
+		if (stat & 1) {
+			DEBUG_IRQ("handling irq %d\n", irq);
+			generic_handle_irq(irq);
+		}
+		irq++;
+		stat >>= 1;
+	}
+}
+
+static int
+netx_hif_irq_type(struct irq_data *d, unsigned int type)
+{
+	unsigned int val, irq;
+
+	val = readl(NETX_DPMAS_IF_CONF1);
+
+	irq = d->irq - NETX_IRQ_HIF_CHAINED(0);
+
+	if (type & IRQ_TYPE_EDGE_RISING) {
+		DEBUG_IRQ("rising edges\n");
+		val |= (1 << 26) << irq;
+	}
+	if (type & IRQ_TYPE_EDGE_FALLING) {
+		DEBUG_IRQ("falling edges\n");
+		val &= ~((1 << 26) << irq);
+	}
+	if (type & IRQ_TYPE_LEVEL_LOW) {
+		DEBUG_IRQ("low level\n");
+		val &= ~((1 << 26) << irq);
+	}
+	if (type & IRQ_TYPE_LEVEL_HIGH) {
+		DEBUG_IRQ("high level\n");
+		val |= (1 << 26) << irq;
+	}
+
+	writel(val, NETX_DPMAS_IF_CONF1);
+
+	return 0;
+}
+
+static void
+netx_hif_ack_irq(struct irq_data *d)
+{
+	unsigned int val, irq;
+
+	irq = d->irq - NETX_IRQ_HIF_CHAINED(0);
+	writel((1 << 24) << irq, NETX_DPMAS_INT_STAT);
+
+	val = readl(NETX_DPMAS_INT_EN);
+	val &= ~((1 << 24) << irq);
+	writel(val, NETX_DPMAS_INT_EN);
+
+	DEBUG_IRQ("%s: irq %d\n", __func__, d->irq);
+}
+
+static void
+netx_hif_mask_irq(struct irq_data *d)
+{
+	unsigned int val, irq;
+
+	irq = d->irq - NETX_IRQ_HIF_CHAINED(0);
+	val = readl(NETX_DPMAS_INT_EN);
+	val &= ~((1 << 24) << irq);
+	writel(val, NETX_DPMAS_INT_EN);
+	DEBUG_IRQ("%s: irq %d\n", __func__, d->irq);
+}
+
+static void
+netx_hif_unmask_irq(struct irq_data *d)
+{
+	unsigned int val, irq;
+
+	irq = d->irq - NETX_IRQ_HIF_CHAINED(0);
+	val = readl(NETX_DPMAS_INT_EN);
+	val |= (1 << 24) << irq;
+	writel(val, NETX_DPMAS_INT_EN);
+	DEBUG_IRQ("%s: irq %d\n", __func__, d->irq);
+}
+
+static struct irq_chip netx_hif_chip = {
+	.irq_ack = netx_hif_ack_irq,
+	.irq_mask = netx_hif_mask_irq,
+	.irq_unmask = netx_hif_unmask_irq,
+	.irq_set_type = netx_hif_irq_type,
+};
+
+void __init netx_init_irq(void)
+{
+	int irq;
+
+	vic_init(io_p2v(NETX_PA_VIC), NETX_IRQ_VIC_START, ~0, 0);
+
+	for (irq = NETX_IRQ_HIF_CHAINED(0); irq <= NETX_IRQ_HIF_LAST; irq++) {
+		irq_set_chip_and_handler(irq, &netx_hif_chip,
+					 handle_level_irq);
+		set_irq_flags(irq, IRQF_VALID);
+	}
+
+	writel(NETX_DPMAS_INT_EN_GLB_EN, NETX_DPMAS_INT_EN);
+	irq_set_chained_handler(NETX_IRQ_HIF, netx_hif_demux_handler);
+}
+
+static int __init netx_init(void)
+{
+	return platform_add_devices(devices, ARRAY_SIZE(devices));
+}
+
+subsys_initcall(netx_init);
+
+void netx_restart(enum reboot_mode mode, const char *cmd)
+{
+	writel(NETX_SYSTEM_RES_CR_FIRMW_RES_EN | NETX_SYSTEM_RES_CR_FIRMW_RES,
+	       NETX_SYSTEM_RES_CR);
+}