Term Project Overview Yong Wang

Introduction Goal –familiarize with the design and implementation of a simple pipelined RISC processor What to do –Build a processor from scratch (single-cycle implementation) –Add some functions Pipeline datapath, pipeline control, hazard detection unit, forwarding unit, branch hazard handling unit –Write an assembler that detects data hazard and optimizes the code to minimize stalls

Project Assignment Team-based work 4 to 5 Team members Task assignment for reference –2-3 ISA and logical design –1 assembler and application program –1 project management (team leader) and website maintenance

Project Facilities Altera UP2 education board and manual Altera Quartus II Web Edition software (downloadable from website) –Has a retired version, MaxPlusII software ByteBlasterMV parallel port download cable

Project Overview Processor logical design (design, compile, simulate) Assembler in high-level language UP2 board download Application Program in MIPS assembly (.mif file) Input: DIP, PB Output: displays Components design, compile and simulate

On paper QuartusII 1.Graphical tool 2.VHDL C, C++, Java UP2 board Project Phases

Phase I Basic Design Processor structure –5 stage Standard hazard handling addressed in textbooks and lectures –4 stage or less Eliminate some hazards and simplify hardware design –Components: PC, decoder, ALU, pipeline registers, I/O, IM, DM, etc.

Phase I Basic Design (continued) Instruction length –ISA, refer to MIPS –How many instruction types (R, I, J) –Instruction format Instruction and data bus width Instruction memory (# of inst * avg. instr. length) data memory immediate field register file sizes (#, and # of bits per register)

Phase II Logic Design Components to be designed –PC –decoder –ALU –Forwarding units –Memory mapped I/O –pipeline registers (after your single cycle CPU design) Components to be customized –IM (LPM_file, LPM_WIDTH, LPM_WIDTHAD) A ready-to-use ROM component –DM (LPM_file, LPM_WIDTH, LPM_WIDTHAD) A ready to use RAM component

Phase III Logical Simulation Compile – no design errors; also check the warnings Simulation – implements desired functions –Feed signals to inputs, run it and check the output signals –The most important debugging tool Timing analyzer –Analyzing the system efficiency

Phase IV Assembler Choose any high-level development language –Java, C, C++, Perl Function requirement (can use hardware also) –Branch hazards, Load stalls Steps 1.Resolve all symbols 2.Convert instructions to the proper memory format that Altera specifies (an example in Appendix A in project description)

Phase V Work on board Connect to computer by ByteBlaster Debug Make sure your processor (and the application program) works in simulation before downloading to board