CpE 442 Introduction To Computer Architecture Lecture 1

Transcription

1 CpE 442 Introduction To Computer Architecture Lecture 1 Instructor: H. H. Ammar These slides are based on the lecture slides provided with the course text book specified in the course syllabus The original slides were prepared by D. Patterson et al, UC Berkeley.

2 Overview of Today s Lecture Course Overview Levels of Representation Levels of Organization

3 Course Overview Computer Design Instruction Set Deign Machine Language Compiler View "Computer Architecture" "Instruction Set Processor" "Building Architect" Computer Hardware Design Machine Implementation Logic Designer's View "Processor Architecture" "Computer Organization Construction Engineer

4 Instruction Set Architecture... the attributes of a [computing] system as seen by the programmer, i.e. the conceptual structure and functional behavior, as distinct from the organization of the data flows and controls the logic design, and the physical implementation. Amdahl, and Brooks, Organization of Programmable Storage SOFTWARE -- Data Types & Data Structures: Encodings & Representations -- Instruction Formats -- Instruction (or Operation Code) Set -- Modes of Addressing and Accessing Data Items and Instructions -- Exceptional Conditions

5 Organization ISA Level Logic Designer's View FUs & Interconnect -- Capabilities & Performance Characteristics of Principal Functional Units (e.g., Registers, ALUs, Shifters, Logic Units, etc. -- Ways in which these components are interconnected -- nature of information flows between components -- logic and means by which such information flow is controlled. Choreography of FUs to realize the ISA Register Transfer Level Description

6 What is "Computer Architecture? A system concept integrating software, hardware, and firmware to specify the design of computing systems Co-ordination of levels of abstraction Application Compiler Instr. Set Proc. Operating System I/O system Instruction Set Architecture Digital Design Circuit Design Under a set of rapidly changing Forces

7 Forces on Computer Architecture Technology Programming Languages Applications Computer Architecture Operating Systems History

8 Overview of Today s Lecture Course Overview Levels of Representation Levels of Organization

9 Levels of Representation High Level Language Program Compiler Assembly Language Program Assembler Machine Language Program Machine Interpretation temp = v[k]; v[k] = v[k+1]; v[k+1] = temp; lw $15, 0($2) lw $16, 4($2) sw $16, 0($2) sw $15, 4($2) Control Signal Spec

10 MIPS R3000 Instruction Set Architecture Instruction Categories Load/Store Computational Jump and Branch Floating Point - coprocessor Memory Management Special R0 - R31 PC HI LO Instruction Format OP OP OP rs rt rd sa funct rs rt immediate target

11 Measurement and Evaluation Design Architecture is an iterative process -- searching the space of possible designs -- at all levels of computer systems Analysis Creativity Cost / Performance Analysis Bad Ideas Good Ideas Mediocre Ideas

12 Course Overview (cont) Computer Design Instruction Set Deign Machine Language Compiler View "Computer Architecture" "Instruction Set Processor" "Building Architect" Computer Hardware Design Machine Implementation\ Logic Designer's View "Processor Architecture" "Computer Organization" Construction Engineer Few people design computers! Very few design instruction sets! Many people design computer components. Very many people are concerned with computer functions, in detail.

13 So what's in it for you? In-depth understanding of the inner-workings of Computing Systems, their evolution, and trade-offs present at the hardware/software boundary. Insight into fast/slow operations that are easy/hard to implementation hardware Understanding of the design process in the context of a large complex Computing Systems design. Functional Spec --> Control & Datapath Design-- --> Physical implementation

14 Example Architecture: The SPARCstation 20 SPARCstation 20 Memory Controller Memory SIMMs Memory Bus MBus Disk MBu s MBu s Slot 1 Slot 0 Slot 1 Slot 0 Slot 3 Slot 2 Tape MSBI SEC MACIO SCSI Bus Keyboard & Mouse Floppy Disk External Bus

15 Overview of Today s Lecture Course Overview Levels of Representation Levels of Organization

16 Levels of Organization SPARCstation 20 Computer SPARC Processor Control Memory Devices Input Datapath Output

17 The Underlying Network SPARCstation 20 Memory Controller Memory Bus MSBI Processor Bus: MBus SEC Standard I/O Bus: Sun s High Speed I/O Bus: SCSI Bus MACIO Low Speed I/O Bus: External Bus

18 Processor and Caches SPARCstation 20 MBus MBus Module SuperSPARC Processor MBu s MBu s Slot 1 Slot 0 Registers Datapath Internal Cache Control External Cache

19 SIMM Slot 0 SIMM Slot 1 SIMM Slot 2 SIMM Slot 3 SIMM Slot 4 SIMM Slot 5 SIMM Slot 6 SIMM Slot 7 Memory SPARCstation 20 Memory Controller Memory Bus DRAM SIMM DRAM DRAM DRAM DRAM DRAM DRAM DRAM DRAM DRAM DRAM

20 Input and Output (I/O) Devices SCSI Bus: Standard I/O Devices SPARCstation 20 : High Speed I/O Devices External Bus: Low Speed I/O Device Disk Slot 1 Slot 3 Tape Slot 0 Slot 2 SEC MACIO SCSI Bus Keyboard & Mouse Floppy Disk External Bus

21 Standard I/O Devices SPARCstation 20 SCSI = Small Computer Systems Interface A standard interface (IBM, Apple, HP, Sun... etc.) Computers and I/O devices communicate with each other The hard disk is one I/O device resides on the SCSI Bus Disk Tape SCSI Bus

22 High Speed I/O Devices SPARCstation 20 is SUN s own high speed I/O bus SS20 has four slots where we can plug in I/O devices Example: graphics accelerator, video adaptor,... etc. High speed and low speed are relative terms Slot 1 Slot 3 Slot 0 Slot 2

23 Slow Speed I/O Devices SPARCstation 20 The are only four slots in SS20-- seats are expensive The speed of some I/O devices is limited by human reaction time--very very slow by computer standard Examples: Keyboard and mouse No reason to use up one of the expensive slot Keyboard & Mouse Floppy Disk External Bus

24 Computer Architecture Simulation Tools 1. The HASE Architecture Simulation Environment 2. The New Compiler Technology simulation (to beshown in class) 3. MIPS Assembly Language Simulators a. SPIM A MIPS32 Simulator b. MARS (MIPS Assembler and Runtime Simulator)

25 Summary All computers consist of five components Processor: (1) datapath and (2) control (3) Memory (4) Input devices and (5) Output devices Not all memory are created equally Cache: fast (expensive) memory are placed closer to the processor Main memory: less expensive memory--we can have more Input and output (I/O) devices has the messiest organization Wide range of speed: graphics vs. keyboard Wide range of requirements: speed, standard, cost... etc. Least amount of research (so far)