Methods and systems for applications to interact with hardware

Details Methods and systems for applications to interact with hardware Methods and systems for applications to interact with hardware

2007-01-02

2007-01-02

Thomson, William (Department: 2194)

Electrical computers and digital processing systems: interprogra

Miscellaneous

C717S106000

Reexamination Certificate

active

09570252

ABSTRACT:
A method of providing Java application layer access to hardware peripheral memory mapped registers is provided together with a processor adapted to implement such a method. A fixed memory address space for a hardware peripheral's memory mapped registers is identified, and a Java object is constructed having elements which occupy this fixed memory address space. This allows a Java application to be provided with access to the hardware peripheral's memory mapped registers directly through the Java object. A new Java class is defined having base address and length parameters and in some cases also having a type parameter. This is used in constructing the Java object. When a Java object has an object descriptor which is effectively an object header and a pointer to where the object data is located, constructing the Java object may be done by creating an object descriptor, and then creating an object handle for the Java object which points to the object descriptor. Alternatively, a level of indirection may be removed, and the object handle created to point directly to the object created so as to exist in memory mapped register space.

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DeCastro, Alex; JavaOS Architecture; Apr. 4, 1998, pp. 1-5.

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