Doc: emsdp doc improvment

Signed-off-by: Yuguo Zou <yuguo.zou@synopsys.com>

Author: YuguoWH

doc/documents/board/emsdp.rst

@@ -70,10 +70,6 @@ The DesignWare ARC EM Software Development Platform contains the following compo
   - Generic Pin Header (52 pins)
 
 
-.. image:: /pic/EMSDP_Block_Diagram.png
-    :alt: EMSDP Block Diagram
-
-
 FPGA
 ^^^^
 
@@ -93,6 +89,9 @@ There are many peripheral devices available, such as SPI, IIC, UART, GPIO.
 Upon these, the ARC EM SDP offers multiple interfaces for audio, USB, micro-SD card, wireless, ADC, motion sensor, etc.
 External hardware modules can also be easily connected to the board though extension interfaces using Pmod Connectors, Arduino, mikro BUS.
 
+.. image:: /pic/emsdp_peripheral_interfaces.jpg
+    :alt: EM SDP Interfaces
+
 Extensions
 ^^^^^^^^^^
 
@@ -117,6 +116,22 @@ You may also skip this step if you are using default settings.
 
 .. note:: Learn more about programming FPGA device in `ARC_EM_SDP_UserGuide`
 
+Package Preparation
+^^^^^^^^^^^^^^^^^^^
+This section talks about how to add new ARC EM SDP cores into embARC OSP.
+If you are using default cores of ARC EM SDP: *em6_scss*, *em7d_esp_dfss*, and *em11d_dfss*, then you may skip this section.
+
+#. You may download the package from our website. Suppose you want to add a new package called ``em9d_dfss``, your package name would be ``embarc_em9d_dfss.zip``.
+
+#. Download the package and unzip it, you will find four folders: ``/doc``, ``/fpga``, ``/include``, ``/tool_config``. Now create a new folder according to your board revision and package name. In this case *em9d_dfss* is added to *rev2* board, so you should set your directory as this:``/board/emsdp/rev2/configs/em9d_dfss``
+
+#. Copy ``/tool_config`` folder to ``/board/emsdp/rev2/configs/em9d_dfss/tool_config``.
+
+#. Copy all ``/include`` files except ``core_config.h`` to ``/board/emsdp/rev2/configs/em9d_dfss``
+
+#. Rename ``board_emsdp.h`` to ``core_hardware.h``, open the file and delete its contents from line 25 to line 100.
+
+#. You are done importing a new package, build with it to make sure everything is working.
 
 Run Your First Program
 ^^^^^^^^^^^^^^^^^^^^^^