CONTROLLING OPERATIONS ACCORDING TO ANOTHER SYSTEM'S ARCHITECTURE

摘要

An I/O device operating according to a native computer architecture is accessed by a primary computer system operating according to a primary computer architecture. An application program of the primary computer system requests an I/O operation to access the I/O device. To facilitate this access, an application program interface formed of primary instructions for execution by the primary processor processes the I/O operation to provide an I/O request and to receive an interrupt in response to completion of the access. A thread is formed of primary instructions for execution by the primary processor for receiving the interrupt from the application program interface. A subsystem operates in response to the I/O request to access the I/O device and to provide the interrupt.

主权项

1. A computer program product for facilitating access to input/output (I/O) devices of a computing environment, the computer program product comprising:
a non-transitory computer readable storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for performing a method comprising:
processing, by an application program interface executing on a processor of a first computer system operating according to a first system architecture, an I/O operation requested by an application of the first computer system to access an I/O device operating according to a second system architecture, the second system architecture different from the first system architecture, wherein the first system architecture has a first machine instruction set different from a second machine instruction set of the second system architecture, said processing providing an I/O request, and wherein the application program interface executing on the processor of the first computer system operating according to the first system architecture includes one or more library functions to implement functionality of one or more I/O instructions of the second system architecture to provide access to the I/O device; andobtaining, by the application program interface, an interrupt for the I/O device accessed based on the I/O request, the interrupt to indicate completion of the I/O operation.