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Amrita School of Engineering, Bangalore Campus

ES716 : Hardware Software Codesign

Amrita School of Engineering, Bangalore Campus

Dr. Sudarshan TSB

Professor

Dept. of CSE

Introduction

Lecture 01

Today

� Discussion of Handout

Introduction to the course

August 18, 2012 ©TSB Sudarshan, ASE, Bangalore 2

� Introduction to the course

Course Information� Books:

A Practical Introduction to Hardware/Software Codesign,

Patrick Schaumont,Springer, 2009, ISBN 978-1-4419-5999-7

Specification and Design of Embedded Systems

Daniel D. Gajski, Frank Vahid, S. Narayan, & J. Gong, Prentice Hall,

1994.


1994.

Hardware / Software Co-Design: Principles and Practice,

J Staunstrup and Wayne Wolf, Prentice Hall, 1994.

� References

Journal & Conference Papers

Relevant Conferences

� MEMOCODE :Conference on Formal Methods and Models for Codesign

� CODES_ISSS: The premier conference for System Level Design

The CODES+ISSS Conference is the merger of two major

international symposia on hardware/software codesign and system

synthesis.

� DAC: Design Automation Conference

� ASP-DAC: Asia South Pacific Design Automation Conference

� CASES: International Conference on Compilers, Architecture and Synthesis

for Embedded Systems

� ICCAD; International Conference on Computer Aided Design

� RSP: IEEE International Symposium on Rapid System Prototyping.

� ACSD: International Conference on Application of Concurrency to System

Design

� HLDVT: IEEE International High Level Design Validation and Test

Workshop


Course Goals

� Architectural Models

� Specification Languages

� Partitioning issues

� Partitioning techniques

Co-simulation, Co-synthesis


� Co-simulation, Co-synthesis

� Design Quality Estimation

� Compilation Techniques

� System-Design Methodology

� Recent Trends

Course Grading

� Assignments

� Term Paper

� Test-1 : 15%

20%


Test-1 : 15%

� Test-2 : 15%

� End Sem Exam : 50%

Introduction

� Digital systems designs consists of hardware

components and software programs that

execute on the hardware platforms


execute on the hardware platforms

� What is Hardware-Software Co-design ?

Wall Crumbled?

� Analog vs Digital

� ISP vs ASIP


� ASIC vs FPGA

� Hardware vs Software

Digital Design

Judged by its objective in application domain

� Performance (Speed, Power)

� Design & Manufacturing cost (Cost, Time)


Design & Manufacturing cost (Cost, Time)

� Ease of Programmability

It depends on both the hardware & software

components

Speed….

� Computer Architects argue

� Performance is an advantage of hardware(ASIC) over software (runnibg on a microprocessor)

Unfortunately,� Unfortunately,

� High-end processor have very high clk freq that much faster than ASICs

� Speed….

� Not an important metric…although a good metric..


Power…

� Consider the energy consumption of an AES

engine (encryption) on different architectures:


Dedicated Hardware engines are better…

Embedded Systems…

� Is a system that has software embedded into

a computer-hardware, which makes a system

dedicated for an application or specific part of

an application or product or part of a larger an application or product or part of a larger

system.

� Is one that has a dedicated purpose software

embedded in a computer hardware


Embedded Systems…

� It is any device that includes a programmable

computer buts is not itself intended to be a computer buts is not itself intended to be a

general purpose computer…� Wayne Wolf


Hardware-Software Co-design


Concurrent Design

� Traditional Design Flow • Concurrent (Co-design)

Flow

August 18, 2012©TSB Sudarshan, ASE, Bangalore 17

What is HW/SW Co-Design?

• The cooperative design of hardware and software components;

• The unification of currently separate hardware and software paths;


hardware and software paths;

• Moving of functionality between hardware and software;

Co-design Definition and Key Concepts

� Co-design� The meeting of system-level objectives by

exploiting the trade-offs between hardware and software in a system through their concurrent design

August 18, 2012 ©TSB Sudarshan, ASE, Bangalore

� Key concepts� Concurrent: hardware and software developed

at the same time on parallel paths

� Integrated: interaction between hardware and software developments to produce designs that meet performance criteria and functional specifications

20

Hardware Programmability


FPGAs

� FPGA circuits can be configured on-the-fly

to implement a specific software function

with better performance than on

microprocessor.

� FPGA can be reprogrammed to perform


� FPGA can be reprogrammed to perform

another specific function without changing

the underlying hardware.

This flexibility allows new design methodolgy for digital circuits.

Motivations for Codesign� Factors driving codesign

(hardware/software systems):

� Instruction Set Processors (ISPs) available as cores in many design kits (386s, DSPs, microcontrollers,etc.)


microcontrollers,etc.)

� Systems on Silicon - many transistors available in typical processes (> 10 million transistors available in IBM ASIC processor, etc.)

� Increasing capacity of field programmable devices- some devices even able to be reprogrammed on-the-fly (FPGAs, CPLDs, etc.)

� Efficient C compilers for embedded processors

� Hardware synthesis capabilities


Motivations for Codesign (contd…)

� The importance of codesign in designing hardware/software systems:� Improves design quality, design cycle time, and

cost� Reduces integration and test time

� Supports growing complexity of embedded

August 18, 2012 ©TSB Sudarshan, ASE, Bangalore

� Supports growing complexity of embedded systems

� Takes advantage of advances in tools and technologies� Processor cores

� High-level hardware synthesis capabilities

� ASIC development

25

References

� De Micheli, Rajesh K Gupta, “Hardware/Software Co-

Design”, Proceedings of IEEE, Vol.85, No. 3, March

1997, pp 349-365

� D Edenfeld, A B Kahng, Mike Rodgers, Y Zorian, “2003

Technology Roadmap for Semiconductors”, IEEE


Technology Roadmap for Semiconductors”, IEEE

Computer, January 2004, pp 47-56.

� Wayne Wolf, “A Decade of Hardware / Software

Codesign”, IEEE Computer, April 2003, pp 38-43.

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