From 22e10714136907fb23fbede16681438a0fb41d1a Mon Sep 17 00:00:00 2001 From: Alex AUVOLAT Date: Fri, 17 Jan 2014 12:00:55 +0100 Subject: =?UTF-8?q?Renomm=C3=A9?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- doc/rapport_cpu.tex | 146 ---------------------------------------------------- 1 file changed, 146 deletions(-) delete mode 100644 doc/rapport_cpu.tex (limited to 'doc/rapport_cpu.tex') diff --git a/doc/rapport_cpu.tex b/doc/rapport_cpu.tex deleted file mode 100644 index 67aa4c1..0000000 --- a/doc/rapport_cpu.tex +++ /dev/null @@ -1,146 +0,0 @@ -\documentclass[11pt, a4paper]{article} - -\usepackage[utf8]{inputenc} - -\usepackage[margin=1.0in]{geometry} -\usepackage[french]{babel} - -\newcommand{\prog}[1]{{\tt#1}} -\newcommand{\underscore}{$\_\,$} - -\begin{document} - - - -\title{Conception and realization of the VIVACE architecture - \\ \normalsize{\textsc{Projet de Système digital}}} -\author{A.Auvolat, E.Enguehard, J.Laurent} -\maketitle - - -The VIVACE\footnote{Virtually Infaillible VIVACE Automated Computing Environment} architecture is -a minimalistic 16 bits RISC microprocessor architecture, largely inspired by the MIPS -microprocessor. - - -The principal characteristics of the architecture are : - -\begin{itemize} -\item \textit{8 general-purpose registers}, which can hold 16 bits integers : \prog{Z, A, B, C, D, E, F, G} -\item \textit{16 bit memory addressing}, enabling the CPU to use up to $64kb$ of memory. -\end{itemize} - -In order to implement and run the architecture, the following programs have been written : - -\begin{itemize} -\item \textit{Netlist simulator} and \textit{netlist optimizer} -\item An \textit{OCaml library} for generating netlists from Caml code -\item The code for the \textit{CPU implementation} (written in Caml) -\item A \textit{monitor} which is used to interact dynamically with the netlist simulator -\item An \textit{assembler} which can be used to produce the ROM files run by the CPU. -\end{itemize} - -\section{How to run the VIVACE cpu} -\subsection{Preparation} - -All the tools described in the introduction must first be compiled : - -\begin{verbatim} - $ cd csim; make; cd .. - $ cd sched; make; cd .. - $ cd monitor; make; cd .. - $ cd asm; make; cd .. -\end{verbatim} - -To run the VIVACE CPU, type the following : - -\begin{verbatim} - $ cd cpu; make -\end{verbatim} - -\subsection{Monitor commands} - -You are now running the VIVACE CPU. The monitor accepts a few commands to control the simulation. -First, you must configure the monitor to communicate with the CPU : - -\begin{verbatim} - t 0 - s 1 19 18 - d7 20 21 22 23 24 25 26 27 -\end{verbatim} - -The first command sets up the tick input (a tick is sent once every second on this input by the monitor). The -second command sets up the serial input/output. The third command sets up the 7-segment display (8 digits displayed). -Now, use the following commands to control the simulation : - -\begin{itemize} - \item \prog{a} run the simulation at full speed - \item \prog{m} run the simulation step by step (enter an empty command to run a step) - \item \prog{f } run the simulation at fixed frequency (frequency is dynamically ajusted so - this is not very accurate) - \item \prog{q} exit simulation -\end{itemize} - -The CPU recieves commands on the serial input. To send a command to the CPU, use the following syntax : - -\begin{verbatim} - : -\end{verbatim} - -For instance: - -\begin{verbatim} - :Y2014 -\end{verbatim} - -These commands are essentially used to set one of the six variables \prog{YMDhms} ; the syntax is similar to the -example command given above. An empty CPU command tells the CPU to just tell us what time and what day it is. - - -\section{Program details} -\subsection{Generating netlists from Caml code} - -We have developped a library that enables us to easily generate netlists from Caml code. The Caml code we write -has the same abstraction level that MiniJazz has, but it is more comfortable to write circuits like this than -with MiniJazz code. - -The library functions are defined in \prog{cpu/netlist\_gen.mli}. Basically, we have created functions that build -the graph of logical operations. The abstract type \prog{t} is actually a closure to a function that adds the -required equation to a netlist program being built, therefore the generation of a netlist consists in two steps : -the generation of a closure graph that describes the graph of logical operations, and the execution of these -closures on a program which, at the beginning, has only the circuit inputs. The equations are progressively -added to the program when the closures are called. - -The VIVACE CPU has been entirely realized using this library. - -\subsection{The VIVACE CPU} - -\subsubsection{Control structure} - -The CPU is able to execute instructions that need several cycles to run. The two first cycles of an instruction's -execution are used to load that instruction (16 bits have to be read, ie two bytes). Most instructions finish -their execution on the second cycle, but some executions need more cycles to run : - -\begin{itemize} - \item Load and store instructions need one or two extra cycles - \item The multiplication operation needs as many cycles as the position - of the most-significant non-null bit in the second operand. - \item The division always runs on 16 cycles. -\end{itemize} - -The execution of instructions on several cycles is implemented using a ``control bit'' that cycles through -several steps : load instruction, various steps of instruction execution. - -The instruction decoding mechanism is in \prog{cpu.ml} which is well-commented. - -\subsubsection{ROM, RAM and MMIO - -\subsubsection{The ALU} - -\subsection{The assembler} - -\subsection{The simulator and the monitor} - -\subsection{The operating system} - -\end{document} -- cgit v1.2.3