ref-manual: Added syslinux class and many variables.

Variables added:
  AUTO_SYSLINUXMENU
  SYSLINUX_OPTS
  SYSLINUX_SPLASH
  SYSLINUX_DEFAULT_CONSOLE
  SYSLINUX_SERIAL
  SYSLINUX_SERIAL_TTY

(From yocto-docs rev: cb47fab2ba00617c8205b36a83b7e97f5504c5d9)

Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 146 insertions, 0 deletions

diff --git a/documentation/ref-manual/ref-classes.xml b/documentation/ref-manual/ref-classes.xml
index 756acee71c..bd1ec36ae3 100644
--- a/documentation/ref-manual/ref-classes.xml
+++ b/documentation/ref-manual/ref-classes.xml
@@ -1979,6 +1979,54 @@
     </para>
 </section>
 
+<section id='ref-classes-syslinux'>
+    <title><filename>syslinux.bbclass</filename></title>
+
+    <para>
+        The <filename>syslinux</filename> class provides syslinux-specific
+        functions for building bootable images.
+    </para>
+
+    <para>
+        The class supports the following variables:
+        <itemizedlist>
+            <listitem><para><emphasis><link linkend='var-INITRD'><filename>INITRD</filename></link>:</emphasis>
+                Indicates a filesystem image to use as an initial RAM disk
+                (initrd).
+                This variable is optional.</para></listitem>
+            <listitem><para><emphasis><link linkend='var-ROOTFS'><filename>ROOTFS</filename></link>:</emphasis>
+                Indicates a filesystem image to include as the root filesystem.
+                This variable is optional.</para></listitem>
+            <listitem><para><emphasis><link linkend='var-AUTO_SYSLINUXMENU'><filename>AUTO_SYSLINUXMENU</filename></link>:</emphasis>
+                Enables creating an automatic menu when set to "1".
+                </para></listitem>
+            <listitem><para><emphasis><link linkend='var-LABELS'><filename>LABELS</filename></link>:</emphasis>
+                Lists targets for automatic configuration.
+                </para></listitem>
+            <listitem><para><emphasis><link linkend='var-APPEND'><filename>APPEND</filename></link>:</emphasis>
+                Lists append string overrides for each label.
+                </para></listitem>
+            <listitem><para><emphasis><link linkend='var-SYSLINUX_OPTS'><filename>SYSLINUX_OPTS</filename></link>:</emphasis>
+                Lists additional options to add to the syslinux file.
+                Semicolon characters separate multiple options.
+                </para></listitem>
+            <listitem><para><emphasis><link linkend='var-SYSLINUX_SPLASH'><filename>SYSLINUX_SPLASH</filename></link>:</emphasis>
+                Lists a background for the VGA boot menu when you are using the
+                boot menu.</para></listitem>
+            <listitem><para><emphasis><link linkend='var-SYSLINUX_DEFAULT_CONSOLE'><filename>SYSLINUX_DEFAULT_CONSOLE</filename></link>:</emphasis>
+                Set to "console=ttyX" to change kernel boot default console.
+                </para></listitem>
+            <listitem><para><emphasis><link linkend='var-SYSLINUX_SERIAL'><filename>SYSLINUX_SERIAL</filename></link>:</emphasis>
+                Sets an alternate serial port.
+                Or, turns off serial when the variable is set with an
+                empty string.</para></listitem>
+            <listitem><para><emphasis><link linkend='var-SYSLINUX_SERIAL_TTY'><filename>SYSLINUX_SERIAL_TTY</filename></link>:</emphasis>
+                Sets an alternate "console=tty..." kernel boot argument.
+                </para></listitem>
+        </itemizedlist>
+    </para>
+</section>
+
 <section id='ref-classes-package_tar'>
     <title><filename>package_tar.bbclass</filename></title>
 
diff --git a/documentation/ref-manual/ref-variables.xml b/documentation/ref-manual/ref-variables.xml
index c5030727f9..049c771ea5 100644
--- a/documentation/ref-manual/ref-variables.xml
+++ b/documentation/ref-manual/ref-variables.xml
@@ -225,6 +225,18 @@
             </glossdef>
          </glossentry>
 
+         <glossentry id='var-AUTO_SYSLINUXMENU'><glossterm>AUTO_SYSLINUXMENU</glossterm>
+            <glossdef>
+                <para>
+                    Enables creating an automatic menu.
+                    You must set this in your recipe.
+                    The
+                    <link linkend='ref-classes-syslinux'><filename>syslinux</filename></link>
+                    class checks this variable.
+                </para>
+            </glossdef>
+         </glossentry>
+
         <glossentry id='var-AUTOREV'><glossterm>AUTOREV</glossterm>
             <glossdef>
                 <para>When <filename><link linkend='var-SRCREV'>SRCREV</link></filename>
@@ -6179,6 +6191,92 @@ recipes-graphics/xorg-font/font-alias_1.0.3.bb:PR = "${INC_PR}.3"
             </glossdef>
         </glossentry>
 
+        <glossentry id='var-SYSLINUX_DEFAULT_CONSOLE'><glossterm>SYSLINUX_DEFAULT_CONSOLE</glossterm>
+            <glossdef>
+                <para>
+                    Specifies the kernel boot default console.
+                    If you want to use a console other than the default,
+                    set this variable in your recipe as follows where "X" is
+                    the console number you want to use:
+                    <literallayout class='monospaced'>
+     SYSLINUX_DEFAULT_CONSOLE = "console=ttyX"
+                    </literallayout>
+                </para>
+
+                <para>
+                    The
+                    <link linkend='ref-classes-syslinux'><filename>syslinux</filename></link>
+                    class initially sets this variable to null but then checks
+                    for a value later.
+                </para>
+            </glossdef>
+        </glossentry>
+
+        <glossentry id='var-SYSLINUX_OPTS'><glossterm>SYSLINUX_OPTS</glossterm>
+            <glossdef>
+                <para>
+                    Lists additional options to add to the syslinux file.
+                    You need to set this variable in your recipe.
+                    If you want to list multiple options, separate the options
+                    with a semicolon character (<filename>;</filename>).
+                </para>
+
+                <para>
+                    The
+                    <link linkend='ref-classes-syslinux'><filename>syslinux</filename></link>
+                    class uses this variable to create a set of options.
+                </para>
+            </glossdef>
+        </glossentry>
+
+        <glossentry id='var-SYSLINUX_SERIAL'><glossterm>SYSLINUX_SERIAL</glossterm>
+            <glossdef>
+                <para>
+                    Specifies the alternate serial port or turns it off.
+                    To turn off serial, set this variable to an empty string
+                    in your recipe.
+                    The variable's default value is set in the
+                    <link linkend='ref-classes-syslinux'><filename>syslinux</filename></link>
+                    as follows:
+                    <literallayout class='monospaced'>
+     SYSLINUX_SERIAL ?= "0 115200"
+                    </literallayout>
+                    The class checks for and uses the variable as needed.                </para>
+            </glossdef>
+        </glossentry>
+
+        <glossentry id='var-SYSLINUX_SPLASH'><glossterm>SYSLINUX_SPLASH</glossterm>
+            <glossdef>
+                <para>
+                    An <filename>.LSS</filename> file used as the background
+                    for the VGA boot menu when you are using the boot menu.
+                    You need to set this variable in your recipe.
+                </para>
+
+                <para>
+                    The
+                    <link linkend='ref-classes-syslinux'><filename>syslinux</filename></link>
+                    class checks for this variable and if found, the
+                    OpenEmbedded build system installs the splash screen.
+                </para>
+            </glossdef>
+        </glossentry>
+
+        <glossentry id='var-SYSLINUX_SERIAL_TTY'><glossterm>SYSLINUX_SERIAL_TTY</glossterm>
+            <glossdef>
+                <para>
+                    Specifies the alternate console=tty... kernel boot argument.
+                    The variable's default value is set in the
+                    <link linkend='ref-classes-syslinux'><filename>syslinux</filename></link>
+                    as follows:
+                    <literallayout class='monospaced'>
+     SYSLINUX_SERIAL_TTY ?= "console=ttyS0,115200"
+                    </literallayout>
+                    The class checks for and uses the variable as needed.
+                </para>
+            </glossdef>
+        </glossentry>
+
         <glossentry id='var-SYSROOT_PREPROCESS_FUNCS'><glossterm>SYSROOT_PREPROCESS_FUNCS</glossterm>
             <glossdef>
                 <para>