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, 132 insertions, 0 deletions

diff --git a/kernel/arch/mn10300/unit-asb2364/unit-init.c b/kernel/arch/mn10300/unit-asb2364/unit-init.c
new file mode 100644
index 000000000..6359b41ce
--- /dev/null
+++ b/kernel/arch/mn10300/unit-asb2364/unit-init.c
@@ -0,0 +1,132 @@
+/* ASB2364 initialisation
+ *
+ * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/param.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+
+#include <asm/io.h>
+#include <asm/setup.h>
+#include <asm/processor.h>
+#include <asm/irq.h>
+#include <asm/intctl-regs.h>
+#include <asm/serial-regs.h>
+#include <unit/fpga-regs.h>
+#include <unit/serial.h>
+#include <unit/smsc911x.h>
+
+#define TTYS0_SERIAL_IER	__SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_IER * 2, u8)
+#define LAN_IRQ_CFG		__SYSREG(SMSC911X_BASE + 0x54, u32)
+#define LAN_INT_EN		__SYSREG(SMSC911X_BASE + 0x5c, u32)
+
+/*
+ * initialise some of the unit hardware before gdbstub is set up
+ */
+asmlinkage void __init unit_init(void)
+{
+	/* Make sure we aren't going to get unexpected interrupts */
+	TTYS0_SERIAL_IER = 0;
+	SC0RXICR = 0;
+	SC0TXICR = 0;
+	SC1RXICR = 0;
+	SC1TXICR = 0;
+	SC2RXICR = 0;
+	SC2TXICR = 0;
+
+	/* Attempt to reset the FPGA attached peripherals */
+	ASB2364_FPGA_REG_RESET_LAN = 0x0000;
+	SyncExBus();
+	ASB2364_FPGA_REG_RESET_UART = 0x0000;
+	SyncExBus();
+	ASB2364_FPGA_REG_RESET_I2C = 0x0000;
+	SyncExBus();
+	ASB2364_FPGA_REG_RESET_USB = 0x0000;
+	SyncExBus();
+	ASB2364_FPGA_REG_RESET_AV = 0x0000;
+	SyncExBus();
+
+	/* set up the external interrupts */
+
+	/* XIRQ[0]: NAND RXBY */
+	/* SET_XIRQ_TRIGGER(0, XIRQ_TRIGGER_LOWLEVEL); */
+
+	/* XIRQ[1]: LAN, UART, I2C, USB, PCI, FPGA */
+	SET_XIRQ_TRIGGER(1, XIRQ_TRIGGER_LOWLEVEL);
+
+	/* XIRQ[2]: Extend Slot 1-9 */
+	/* SET_XIRQ_TRIGGER(2, XIRQ_TRIGGER_LOWLEVEL); */
+
+#if defined(CONFIG_EXT_SERIAL_IRQ_LEVEL) &&	\
+    defined(CONFIG_ETHERNET_IRQ_LEVEL) &&	\
+    (CONFIG_EXT_SERIAL_IRQ_LEVEL != CONFIG_ETHERNET_IRQ_LEVEL)
+# error CONFIG_EXT_SERIAL_IRQ_LEVEL != CONFIG_ETHERNET_IRQ_LEVEL
+#endif
+
+#if defined(CONFIG_EXT_SERIAL_IRQ_LEVEL)
+	set_intr_level(XIRQ1, NUM2GxICR_LEVEL(CONFIG_EXT_SERIAL_IRQ_LEVEL));
+#elif defined(CONFIG_ETHERNET_IRQ_LEVEL)
+	set_intr_level(XIRQ1, NUM2GxICR_LEVEL(CONFIG_ETHERNET_IRQ_LEVEL));
+#endif
+}
+
+/*
+ * initialise the rest of the unit hardware after gdbstub is ready
+ */
+asmlinkage void __init unit_setup(void)
+{
+	/* Release the reset on the SMSC911X so that it is ready by the time we
+	 * need it */
+	ASB2364_FPGA_REG_RESET_LAN = 0x0001;
+	SyncExBus();
+	ASB2364_FPGA_REG_RESET_UART = 0x0001;
+	SyncExBus();
+	ASB2364_FPGA_REG_RESET_I2C = 0x0001;
+	SyncExBus();
+	ASB2364_FPGA_REG_RESET_USB = 0x0001;
+	SyncExBus();
+	ASB2364_FPGA_REG_RESET_AV = 0x0001;
+	SyncExBus();
+
+	/* Make sure the ethernet chipset isn't going to give us an interrupt
+	 * storm from stuff it was doing pre-reset */
+	LAN_IRQ_CFG = 0;
+	LAN_INT_EN = 0;
+}
+
+/*
+ * initialise the external interrupts used by a unit of this type
+ */
+void __init unit_init_IRQ(void)
+{
+	unsigned int extnum;
+
+	for (extnum = 0 ; extnum < NR_XIRQS ; extnum++) {
+		switch (GET_XIRQ_TRIGGER(extnum)) {
+			/* LEVEL triggered interrupts should be made
+			 * post-ACK'able as they hold their lines until
+			 * serviced
+			 */
+		case XIRQ_TRIGGER_HILEVEL:
+		case XIRQ_TRIGGER_LOWLEVEL:
+			mn10300_set_lateack_irq_type(XIRQ2IRQ(extnum));
+			break;
+		default:
+			break;
+		}
+	}
+
+#define IRQCTL	__SYSREG(0xd5000090, u32)
+	IRQCTL |= 0x02;
+
+	irq_fpga_init();
+}