Hardware Objects for Java

Martin Schoeberl; Christian Thalinger; Stephan Korsholm; Anders Peter Ravn

Hardware Objects for Java

Martin Schoeberl, Christian Thalinger, Stephan Korsholm, Anders Peter Ravn

Department of Computer Science

Research output: Contribution to book/anthology/report/conference proceeding › Article in proceeding › Research › peer-review

27 Citations (Scopus)

Abstract

Java, as a safe and platform independent language, avoids access to low-level I/O devices or direct memory access.
In standard Java, low-level I/O it not a concern; it is handled by the operating system. However, in the embedded domain resources are scarce and a Java virtual machine (JVM) without an underlying middleware is an attractive architecture. When running the JVM on bare metal, we need access to I/O devices from Java; therefore we investigate a safe and efficient mechanism to represent I/O devices as first class Java objects, where device registers are represented by object fields. Access to those registers is safe as Java’s type system regulates it. The access is
also fast as it is directly performed by the bytecodes getfield and putfield.

Hardware objects thus provide an object-oriented abstraction of low-level hardware devices. As a proof of concept,
we have implemented hardware objects in three quite different JVMs: in the Java processor JOP, the JIT compiler
CACAO, and in the interpreting embedded JVM SimpleRTJ.

Original language	English
Title of host publication	11th IEEE International Symposium on Object Oriented Real-Time Distributed Computing (ISORC)
Publisher	IEEE Computer Society Press
Publication date	2008
Pages	445-452
ISBN (Print)	978-0-7695-3132-8
Publication status	Published - 2008
Event	International Symposium on Object Oriented Real-Time Distributed Computing - Orlando, Florida, United States Duration: 5 May 2008 → 7 May 2008 Conference number: 11

Conference

Conference	International Symposium on Object Oriented Real-Time Distributed Computing
Number	11
Country/Territory	United States
City	Orlando, Florida
Period	05/05/2008 → 07/05/2008

Keywords

Java
Hardware Interface
Embedded Systems

Access to Document

http://doi.ieeecomputersociety.org/10.1109/ISORC.2008.63

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title = "Hardware Objects for Java",

abstract = "Java, as a safe and platform independent language, avoids access to low-level I/O devices or direct memory access.In standard Java, low-level I/O it not a concern; it is handled by the operating system. However, in the embedded domain resources are scarce and a Java virtual machine (JVM) without an underlying middleware is an attractive architecture. When running the JVM on bare metal, we need access to I/O devices from Java; therefore we investigate a safe and efficient mechanism to represent I/O devices as first class Java objects, where device registers are represented by object fields. Access to those registers is safe as Java{\textquoteright}s type system regulates it. The access isalso fast as it is directly performed by the bytecodes getfield and putfield.Hardware objects thus provide an object-oriented abstraction of low-level hardware devices. As a proof of concept,we have implemented hardware objects in three quite different JVMs: in the Java processor JOP, the JIT compilerCACAO, and in the interpreting embedded JVM SimpleRTJ. ",

keywords = "Java, Hardware Interface, Embedded Systems",

author = "Martin Schoeberl and Christian Thalinger and Stephan Korsholm and Ravn, {Anders Peter}",

year = "2008",

language = "English",

isbn = "978-0-7695-3132-8",

pages = "445--452",

booktitle = "11th IEEE International Symposium on Object Oriented Real-Time Distributed Computing (ISORC)",

publisher = "IEEE Computer Society Press",

address = "United States",

note = "International Symposium on Object Oriented Real-Time Distributed Computing ; Conference date: 05-05-2008 Through 07-05-2008",

}

Schoeberl, M, Thalinger, C, Korsholm, S & Ravn, AP 2008, Hardware Objects for Java. in 11th IEEE International Symposium on Object Oriented Real-Time Distributed Computing (ISORC). IEEE Computer Society Press, pp. 445-452, International Symposium on Object Oriented Real-Time Distributed Computing, Orlando, Florida, United States, 05/05/2008. <http://doi.ieeecomputersociety.org/10.1109/ISORC.2008.63>

TY - GEN

T1 - Hardware Objects for Java

AU - Schoeberl, Martin

AU - Thalinger, Christian

AU - Korsholm, Stephan

AU - Ravn, Anders Peter

N1 - Conference code: 11

PY - 2008

Y1 - 2008

N2 - Java, as a safe and platform independent language, avoids access to low-level I/O devices or direct memory access.In standard Java, low-level I/O it not a concern; it is handled by the operating system. However, in the embedded domain resources are scarce and a Java virtual machine (JVM) without an underlying middleware is an attractive architecture. When running the JVM on bare metal, we need access to I/O devices from Java; therefore we investigate a safe and efficient mechanism to represent I/O devices as first class Java objects, where device registers are represented by object fields. Access to those registers is safe as Java’s type system regulates it. The access isalso fast as it is directly performed by the bytecodes getfield and putfield.Hardware objects thus provide an object-oriented abstraction of low-level hardware devices. As a proof of concept,we have implemented hardware objects in three quite different JVMs: in the Java processor JOP, the JIT compilerCACAO, and in the interpreting embedded JVM SimpleRTJ.

AB - Java, as a safe and platform independent language, avoids access to low-level I/O devices or direct memory access.In standard Java, low-level I/O it not a concern; it is handled by the operating system. However, in the embedded domain resources are scarce and a Java virtual machine (JVM) without an underlying middleware is an attractive architecture. When running the JVM on bare metal, we need access to I/O devices from Java; therefore we investigate a safe and efficient mechanism to represent I/O devices as first class Java objects, where device registers are represented by object fields. Access to those registers is safe as Java’s type system regulates it. The access isalso fast as it is directly performed by the bytecodes getfield and putfield.Hardware objects thus provide an object-oriented abstraction of low-level hardware devices. As a proof of concept,we have implemented hardware objects in three quite different JVMs: in the Java processor JOP, the JIT compilerCACAO, and in the interpreting embedded JVM SimpleRTJ.

KW - Java

KW - Hardware Interface

KW - Embedded Systems

M3 - Article in proceeding

SN - 978-0-7695-3132-8

SP - 445

EP - 452

BT - 11th IEEE International Symposium on Object Oriented Real-Time Distributed Computing (ISORC)

PB - IEEE Computer Society Press

T2 - International Symposium on Object Oriented Real-Time Distributed Computing

Y2 - 5 May 2008 through 7 May 2008

ER -

Hardware Objects for Java

Abstract

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Keywords

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