4. Seminar - Assignment of the first semestral project

The first semester project - deadline for submission is week 7

Complete assignment of the first semester project: 01_semester_project.pdf

Project evaluation:

	Points
Transcription of the simulated program into the symbolic address language	2
Rewrite of the program in a machine code with an example of coding of at least two instructions	1
Design of system (CPU, memory, program) in Verilog language	6
Simulation (verifying the functionality of the design)	4
Sources formating, commentaries of solution and design functions and description of system functionality, schematic	2
Total:	15

It is necessary to achieve at least 6 points (inclusive) for the successful submission of the project.

The use of C language compiler mips-elf-gcc is allowed, same as the program mips-elf-as for translation from symbolic address language to machine code and for relocation and completion of binary code linker mips-elf-ld can be used.

The Debian packages can be download from binutils-mips-elf_2.34-1_amd64.deb and gcc-mips-elf_10.1.0-1_amd64.deb

Next commands can be used for installation

sudo dpkg -i Downloads/binutils-mips-elf_2.20.51-1_amd64.deb
sudo dpkg -i Downloads/gcc-mips-elf_4.4.4-1_amd64.deb

You can install packages through repository as well

wget -qO - http://pisa-virt.felk.cvut.cz/repos/apt/debian/pisa-virt-reprepro.pub | sudo apt-key add -
echo deb http://pisa-virt.felk.cvut.cz/repos/apt/debian unstable main  >/etc/apt/sources.list.d/pisa-virt-debs.list
apt-get update
apt-get install qtmips

For Windows use mips-elf-gcc-i686-mingw32.zip.

For MacOS binutils-mips-elf_2.34_macos.zip and gcc-mips-elf_10.1.0_macos.zip. Extract on filesystem root.

Useful external pointers:
QtMIPS - MIPS Simulator: https://github.com/cvut/QtMips/
QtSpim - MIPS Simulator: http://pages.cs.wisc.edu/~larus/spim.html
MipsIt - MIPS Simulator: http://www.bostream.nu/mats.brorsson/mipsit/
Compiler: http://cmp.felk.cvut.cz/~pisa/apo/qtmips/
(Windows mips-elf-gcc-i686-mingw32.zip, MAC gcc-mips-elf_7.4_macos.zip + binutils-mips-elf_2.32_macos.zip, Linux: gcc-mips-elf_7.4.0-1_amd64.deb + binutils-mips-elf_2.30.0-1_amd64.deb)
Compiler: https://sites.google.com/site/lccretargetablecompiler/
Compiler Win: http://code.google.com/p/micron-sysv3/downloads/detail?name=mips-elf-gcc.rar&can=2&q=
MIPS Environment over Cygwin on Windows: http://faculty.cs.tamu.edu/bettati/Courses/410/2006C/Projects/gxemulcygwin.html
MIPS Cross-compiler: https://eng.ucmerced.edu/soe/computing/il/collaboratory/collab-software/compilers-and-interpreters/mips-cross-compiler-package

You can base your data and program memory modules on the following Verilog code fragment - take it as an inspiration which is sufficient for our purposes.:

module dmem (input clk, we,
             input [31:0] a, wd,
             output [31:0] rd);
 
  reg [31:0] RAM[127:0];
 
  assign rd = RAM[a[7:2]]; // word aligned
 
  always@(posedge clk)
    if(we) RAM[a[31:2]] <= wd;
 
endmodule

module imem (input [5:0] a,
             output [31:0] rd);
 
  // The "a" is the address of instruction to fetch, what
  // for our purpose can be taken from ProgramCounter[7:2]
 
  reg [31:0] RAM[127:0];
 
  initial  $readmemh ("memfile.dat",RAM);
 
  assign rd <= RAM[a]; // word aligned
 
endmodule