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, 182 insertions, 0 deletions

diff --git a/kernel/Documentation/frv/booting.txt b/kernel/Documentation/frv/booting.txt
new file mode 100644
index 000000000..9bdf4b46e
--- /dev/null
+++ b/kernel/Documentation/frv/booting.txt
@@ -0,0 +1,182 @@
+			  =========================
+			  BOOTING FR-V LINUX KERNEL
+			  =========================
+
+======================
+PROVIDING A FILESYSTEM
+======================
+
+First of all, a root filesystem must be made available. This can be done in
+one of two ways:
+
+  (1) NFS Export
+
+      A filesystem should be constructed in a directory on an NFS server that
+      the target board can reach. This directory should then be NFS exported
+      such that the target board can read and write into it as root.
+
+  (2) Flash Filesystem (JFFS2 Recommended)
+
+      In this case, the image must be stored or built up on flash before it
+      can be used. A complete image can be built using the mkfs.jffs2 or
+      similar program and then downloaded and stored into flash by RedBoot.
+
+
+========================
+LOADING THE KERNEL IMAGE
+========================
+
+The kernel will need to be loaded into RAM by RedBoot (or by some alternative
+boot loader) before it can be run. The kernel image (arch/frv/boot/Image) may
+be loaded in one of three ways:
+
+  (1) Load from Flash
+
+      This is the simplest. RedBoot can store an image in the flash (see the
+      RedBoot documentation) and then load it back into RAM. RedBoot keeps
+      track of the load address, entry point and size, so the command to do
+      this is simply:
+
+	fis load linux
+
+      The image is then ready to be executed.
+
+  (2) Load by TFTP
+
+      The following command will download a raw binary kernel image from the
+      default server (as negotiated by BOOTP) and store it into RAM:
+
+	load -b 0x00100000 -r /tftpboot/image.bin
+
+      The image is then ready to be executed.
+
+  (3) Load by Y-Modem
+
+      The following command will download a raw binary kernel image across the
+      serial port that RedBoot is currently using:
+
+	load -m ymodem -b 0x00100000 -r zImage
+
+      The serial client (such as minicom) must then be told to transmit the
+      program by Y-Modem.
+
+      When finished, the image will then be ready to be executed.
+
+
+==================
+BOOTING THE KERNEL
+==================
+
+Boot the image with the following RedBoot command:
+
+	exec -c "<CMDLINE>" 0x00100000
+
+For example:
+
+	exec -c "console=ttySM0,115200 ip=:::::dhcp root=/dev/mtdblock2 rw"
+
+This will start the kernel running. Note that if the GDB-stub is compiled in,
+then the kernel will immediately wait for GDB to connect over serial before
+doing anything else. See the section on kernel debugging with GDB.
+
+The kernel command line <CMDLINE> tells the kernel where its console is and
+how to find its root filesystem. This is made up of the following components,
+separated by spaces:
+
+  (*) console=ttyS<x>[,<baud>[<parity>[<bits>[<flow>]]]]
+
+      This specifies that the system console should output through on-chip
+      serial port <x> (which can be "0" or "1").
+
+      <baud> is a standard baud rate between 1200 and 115200 (default 9600).
+
+      <parity> is a parity setting of "N", "O", "E", "M" or "S" for None, Odd,
+      Even, Mark or Space. "None" is the default.
+
+      <stop> is "7" or "8" for the number of bits per character. "8" is the
+      default.
+
+      <flow> is "r" to use flow control (XCTS on serial port 2 only). The
+      default is to not use flow control.
+
+      For example:
+
+	console=ttyS0,115200
+
+      To use the first on-chip serial port at baud rate 115200, no parity, 8
+      bits, and no flow control.
+
+  (*) root=<xxxx>
+
+      This specifies the device upon which the root filesystem resides. It
+      may be specified by major and minor number, device path, or even
+      partition uuid, if supported.  For example:
+
+	/dev/nfs	NFS root filesystem
+	/dev/mtdblock3	Fourth RedBoot partition on the System Flash
+	PARTUUID=00112233-4455-6677-8899-AABBCCDDEEFF/PARTNROFF=1
+		first partition after the partition with the given UUID
+	253:0		Device with major 253 and minor 0
+
+      Authoritative information can be found in
+      "Documentation/kernel-parameters.txt".
+
+  (*) rw
+
+      Start with the root filesystem mounted Read/Write.
+
+  The remaining components are all optional:
+
+  (*) ip=<ip>::::<host>:<iface>:<cfg>
+
+      Configure the network interface. If <cfg> is "off" then <ip> should
+      specify the IP address for the network device <iface>. <host> provide
+      the hostname for the device.
+
+      If <cfg> is "bootp" or "dhcp", then all of these parameters will be
+      discovered by consulting a BOOTP or DHCP server.
+
+      For example, the following might be used:
+
+	ip=192.168.73.12::::frv:eth0:off
+
+      This sets the IP address on the VDK motherboard RTL8029 ethernet chipset
+      (eth0) to be 192.168.73.12, and sets the board's hostname to be "frv".
+
+  (*) nfsroot=<server>:<dir>[,v<vers>]
+
+      This is mandatory if "root=/dev/nfs" is given as an option. It tells the
+      kernel the IP address of the NFS server providing its root filesystem,
+      and the pathname on that server of the filesystem.
+
+      The NFS version to use can also be specified. v2 and v3 are supported by
+      Linux.
+
+      For example:
+
+	nfsroot=192.168.73.1:/nfsroot-frv
+
+  (*) profile=1
+
+      Turns on the kernel profiler (accessible through /proc/profile).
+
+  (*) console=gdb0
+
+      This can be used as an alternative to the "console=ttyS..." listed
+      above. I tells the kernel to pass the console output to GDB if the
+      gdbstub is compiled in to the kernel.
+
+      If this is used, then the gdbstub passes the text to GDB, which then
+      simply dumps it to its standard output.
+
+  (*) mem=<xxx>M
+
+      Normally the kernel will work out how much SDRAM it has by reading the
+      SDRAM controller registers. That can be overridden with this
+      option. This allows the kernel to be told that it has <xxx> megabytes of
+      memory available.
+
+  (*) init=<prog> [<arg> [<arg> [<arg> ...]]]
+
+      This tells the kernel what program to run initially. By default this is
+      /sbin/init, but /sbin/sash or /bin/sh are common alternatives.