DRAMSys_gem5 functional examples, essential files and doc

This commit intends to provide functional examples and doc.

README.md

@@ -1547,6 +1547,50 @@ Lets run the simulation for some seconds and then stop the simulation with
 **CTRL-C**.  Observe the output of the simulation in the trace analyzer. The trace
 database file is stored in the gem5 directory in the building directory.
 
+### Gem5 SE mode and DRAMSys
+
+All essential files for some functional examples are provided.
+
+Execute a hello world application:
+
+``` bash
+./DRAMSys_gem5 /home/eder/repos/dram.vp.system/DRAMSys/library/resources/simulations/ddr3-gem5-se.xml ../../DRAMSys/gem5/configs/hello.ini
+```
+
+A **Hello world!** message should be printed to the standard output.
+
+Execute a bubble sort application:
+
+``` bash
+./DRAMSys_gem5 /home/eder/repos/dram.vp.system/DRAMSys/library/resources/simulations/ddr3-gem5-se.xml ../../DRAMSys/gem5/configs/bubblesort.ini
+```
+
+Wait some minutes for the bubble sort application to finish.
+
+The hello application binary was copied from gem5 repository. The bubble sort application was obtained with [gem5.TnT](https://github.com/tukl-msd/gem5.TnT).
+
+Command template for generating **.ini** configuration files follows:
+
+``` bash
+build/ARM/gem5.opt configs/example/se.py -c <application> --mem-size=512MB --mem-channels=1 --caches --l2cache --mem-type=SimpleMemory --cpu-type=TimingSimpleCPU --num-cpu=1 --tlm-memory=transactor
+```
+
+An overview of the architcture being simulated is presented below:
+
+![arch](DRAMSys/docs/images/gem5_se_mode_arch.png)
+
+Note: this is a gem5 generated file, therefore DRAMSys is omitted. DRAMSys is
+direct connected as external tlm slave.
+
+Note: workaround in se.py required:
+```
+    ...
+    if options.tlm_memory:
+        system.physmem = SimpleMemory()
+    MemConfig.config_mem(options, system)
+    ...
+```
+
 ### Boot Linux with gem5 and DRAMSys
 
 The procedure is very similar to the traffic generator example above.
@@ -1607,6 +1651,29 @@ Then start DRAMSys_gem5 with the following command:
 
 For further sophisticated address mappings or scenarios checkout the file DRAMSys/gem5/main.cpp
 
+All essential files for a functional example are provided.
+
+Unzip the disk image:
+
+``` bash
+tar -xaf DRAMSys/gem5/boot_linux/linux-aarch32-ael.img.tar.gz -C DRAMSys/gem5/boot_linux/
+```
+
+Execute the example:
+
+``` bash
+./DRAMSys_gem5 ../../DRAMSys/library/resources/simulations/ddr3-boot-linux.xml ../../DRAMSys/gem5/configs/boot_linux.ini 
+```
+
+Open a new terminal and connect to gem5:
+
+``` bash
+telnet localhost 3456
+```
+
+Wait some minutes for the Linux boot process to complete then login. Username is **root** no password required.
+
+
 ### DRAMSys with gem5 Elastic Traces
 
 For understanding elastic traces and their generation, study the [gem5 wiki](http://gem5.org/TraceCPU) and the paper [13].