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, 88 insertions, 0 deletions

diff --git a/kernel/arch/mips/include/asm/rtlx.h b/kernel/arch/mips/include/asm/rtlx.h
new file mode 100644
index 000000000..c10206548
--- /dev/null
+++ b/kernel/arch/mips/include/asm/rtlx.h
@@ -0,0 +1,88 @@
+/*
+ * 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) 2004, 2005 MIPS Technologies, Inc.  All rights reserved.
+ * Copyright (C) 2013 Imagination Technologies Ltd.
+ */
+#ifndef __ASM_RTLX_H_
+#define __ASM_RTLX_H_
+
+#include <irq.h>
+
+#define RTLX_MODULE_NAME "rtlx"
+
+#define LX_NODE_BASE 10
+
+#define MIPS_CPU_RTLX_IRQ 0
+
+#define RTLX_VERSION 2
+#define RTLX_xID 0x12345600
+#define RTLX_ID (RTLX_xID | RTLX_VERSION)
+#define RTLX_BUFFER_SIZE 2048
+#define RTLX_CHANNELS 8
+
+#define RTLX_CHANNEL_STDIO	0
+#define RTLX_CHANNEL_DBG	1
+#define RTLX_CHANNEL_SYSIO	2
+
+void rtlx_starting(int vpe);
+void rtlx_stopping(int vpe);
+
+int rtlx_open(int index, int can_sleep);
+int rtlx_release(int index);
+ssize_t rtlx_read(int index, void __user *buff, size_t count);
+ssize_t rtlx_write(int index, const void __user *buffer, size_t count);
+unsigned int rtlx_read_poll(int index, int can_sleep);
+unsigned int rtlx_write_poll(int index);
+
+int __init rtlx_module_init(void);
+void __exit rtlx_module_exit(void);
+
+void _interrupt_sp(void);
+
+extern struct vpe_notifications rtlx_notify;
+extern const struct file_operations rtlx_fops;
+extern void (*aprp_hook)(void);
+
+enum rtlx_state {
+	RTLX_STATE_UNUSED = 0,
+	RTLX_STATE_INITIALISED,
+	RTLX_STATE_REMOTE_READY,
+	RTLX_STATE_OPENED
+};
+
+extern struct chan_waitqueues {
+	wait_queue_head_t rt_queue;
+	wait_queue_head_t lx_queue;
+	atomic_t in_open;
+	struct mutex mutex;
+} channel_wqs[RTLX_CHANNELS];
+
+/* each channel supports read and write.
+   linux (vpe0) reads lx_buffer and writes rt_buffer
+   SP (vpe1) reads rt_buffer and writes lx_buffer
+*/
+struct rtlx_channel {
+	enum rtlx_state rt_state;
+	enum rtlx_state lx_state;
+
+	int buffer_size;
+
+	/* read and write indexes per buffer */
+	int rt_write, rt_read;
+	char *rt_buffer;
+
+	int lx_write, lx_read;
+	char *lx_buffer;
+};
+
+extern struct rtlx_info {
+	unsigned long id;
+	enum rtlx_state state;
+	int ap_int_pending;	/* Status of 0 or 1 for CONFIG_MIPS_CMP only */
+
+	struct rtlx_channel channel[RTLX_CHANNELS];
+} *rtlx;
+#endif /* __ASM_RTLX_H_ */