Hardware/Software Introduction Chapter 1 Introduction

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Overcoming long simulation time • Reduce amount of real time simulated – 1 msec execution instead of 1 hour • 0.001sec * 10,000,000 = 10,000 sec = 3 hours – Reduced confidence • 1 msec of cruise controller operation tells us little • Faster simulator – Emulators • Special hardware for simulations – Less precise/accurate simulators • Exchange speed for observability/controllability Embedded Systems Design: A Unified Hardware/Software Introduction, (c) 2000 Vahid/Givargis 74
Reducing precision/accuracy • Don’t need gate-level analysis for all simulations – E.g., cruise control • Don’t care what happens at every input/output of each logic gate – Simulating RT components ~10x faster – Cycle-based simulation ~100x faster • Accurate at clock boundaries only • No information on signal changes between boundaries • Faster simulator often combined with reduction in real time – If willing to simulate for 10 hours • Use instruction-set simulator • Real execution time simulated – 10 hours * 1 / 10,000 – = 0.001 hour – = 3.6 seconds Embedded Systems Design: A Unified Hardware/Software Introduction, (c) 2000 Vahid/Givargis 75
Page 1 and 2:
Embedded Systems Design: A Unified
Page 3 and 4:
Embedded systems overview • Embed
Page 5 and 6:
Some common characteristics of embe
Page 7 and 8:
Design challenge - optimizing desig
Page 9 and 10:
Design challenge - optimizing desig
Page 11 and 12:
Time-to-market: a demanding design
Page 13 and 14:
Losses due to delayed market entry
Page 15 and 16:
The performance design metric • W
Page 17 and 18:
Processor technology • The archit
Page 19 and 20:
General-purpose processors • Prog
Page 21 and 22:
Application-specific processors •
Page 23 and 24: Full-custom/VLSI • All layers are
Page 25 and 26: PLD (Programmable Logic Device) •
Page 27 and 28: Graphical illustration of Moore’s
Page 29 and 30: The co-design ladder • In the pas
Page 31 and 32: Design productivity gap • 1981 le
Page 33 and 34: Summary • Embedded systems are ev
Page 35 and 36: Ch3. GPP: Software Summary • Gene
Page 37 and 38: Ch7. Digital Camera Example Summary
Page 39 and 40: Embedded Systems Design: A Unified
Page 41 and 42: Introduction • Design task - Defi
Page 43 and 44: Automation: synthesis • Early des
Page 45 and 46: Increasing abstraction level • Hi
Page 47 and 48: Gajski’s Y-chart • Each axis re
Page 49 and 50: Two-level minimization • Represen
Page 51 and 52: Minimum cover: K-map approach • K
Page 53 and 54: Minimum cover: heuristics • K-map
Page 55 and 56: Example • Minimized 2-level logic
Page 57 and 58: Technology mapping • Library of g
Page 59 and 60: Integrating logic design and physic
Page 61 and 62: Behavioral synthesis • High-level
Page 63 and 64: System synthesis • Tasks (cont.)
Page 65 and 66: Temporal vs. spatial thinking • D
Page 67 and 68: Verification • Ensuring design is
Page 69 and 70: Simulation • Create computer mode
Page 71 and 72: Advantages over physical implementa
Page 73: Simulation speed • Relative speed
Page 77 and 78: Integrating GPP/SPP simulations •
Page 79 and 80: Emulators • General physical devi
Page 81 and 82: Reuse: intellectual property cores
Page 83 and 84: Advantages/disadvantages of hard co
Page 85 and 86: New challenges to processor provide
Page 87 and 88: New challenges to processor users
Page 89 and 90: Waterfall method • Not very reali
Page 91 and 92: General-purpose processor design mo
Page 93 and 94: Summary • Design technology seeks
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Hardware/Software Introduction Chapter 1 Introduction

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