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, 82 insertions, 0 deletions

diff --git a/kernel/arch/mips/sni/irq.c b/kernel/arch/mips/sni/irq.c
new file mode 100644
index 000000000..ac61b90bc
--- /dev/null
+++ b/kernel/arch/mips/sni/irq.c
@@ -0,0 +1,82 @@
+/*
+ * 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.
+ *
+ * Copyright (C) 1992 Linus Torvalds
+ * Copyright (C) 1994 - 2000 Ralf Baechle
+ * Copyright (C) 2006 Thomas Bogendoerfer
+ */
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+
+#include <asm/i8259.h>
+#include <asm/io.h>
+#include <asm/sni.h>
+#include <asm/irq.h>
+#include <asm/irq_cpu.h>
+
+void (*sni_hwint)(void);
+
+asmlinkage void plat_irq_dispatch(void)
+{
+	sni_hwint();
+}
+
+/* ISA irq handler */
+static irqreturn_t sni_isa_irq_handler(int dummy, void *p)
+{
+	int irq;
+
+	irq = i8259_irq();
+	if (unlikely(irq < 0))
+		return IRQ_NONE;
+
+	generic_handle_irq(irq);
+	return IRQ_HANDLED;
+}
+
+struct irqaction sni_isa_irq = {
+	.handler = sni_isa_irq_handler,
+	.name = "ISA",
+	.flags = IRQF_SHARED
+};
+
+/*
+ * On systems with i8259-style interrupt controllers we assume for
+ * driver compatibility reasons interrupts 0 - 15 to be the i8295
+ * interrupts even if the hardware uses a different interrupt numbering.
+ */
+void __init arch_init_irq(void)
+{
+	init_i8259_irqs();			/* Integrated i8259  */
+	switch (sni_brd_type) {
+	case SNI_BRD_10:
+	case SNI_BRD_10NEW:
+	case SNI_BRD_TOWER_OASIC:
+	case SNI_BRD_MINITOWER:
+		sni_a20r_irq_init();
+		break;
+
+	case SNI_BRD_PCI_TOWER:
+		sni_pcit_irq_init();
+		break;
+
+	case SNI_BRD_PCI_TOWER_CPLUS:
+		sni_pcit_cplus_irq_init();
+		break;
+
+	case SNI_BRD_RM200:
+		sni_rm200_irq_init();
+		break;
+
+	case SNI_BRD_PCI_MTOWER:
+	case SNI_BRD_PCI_DESKTOP:
+	case SNI_BRD_PCI_MTOWER_CPLUS:
+		sni_pcimt_irq_init();
+		break;
+	}
+}