Apparatus and method for modeling behavior of expansion boards in a computer system

• US 6,141,712 A
• Filed: 01/30/1998
• Issued: 10/31/2000
• Est. Priority Date: 01/30/1998
• Status: Expired due to Term

• Current Assignee: Apple Inc.
• Original Assignee: Object Technology Licensing Corporation
• Inventors: Sudhakaran, E. U., Andert, Glenn P.
• Primary Examiner(s): Etienne, Ario
• Application Number:
  US09/016,543
• Time in Patent Office: 1,005 Days
• Field of Search: 710/100, 710/101, 710/102, 710/103, 710/104, 710/62, 710/2, 710/8-11, 710/129, 710/15, 710/17, 710/240, 710/241, 709/303, 709/300, 709/301, 713/1, 713/2, 713/100, 713/200
• US Class Current: 710/104
• CPC Class Codes: G06F 9/4401 Bootstrapping security arrangements therefor G06F21/57

Abstract

When an expansion card is installed in a computer system using a computer viewer, an object is created by the computer viewer to represent the card. The computer viewer uses the card object to examine the card for I/O functions present on the card and to obtain resource requirements for each function. The resource requirements are also provided to a resource conflict resolver object which attempts to assign resources to each I/O function on the cards. If the resource conflict resolver is successful in assigning resource to each I/O function, then the resource assignments are also stored in objects. The computer viewer then uses the card objects to store the resource objects in a persistent storage. During a later system boot operation, the booting system creates bus and card recognizer objects which identify expansion buses and cards present in the system and retrieve the function resource objects from the persistent storage to represent each expansion card.

Claims

1. Apparatus for use in a computer system having a memory, a plurality of system resources, and a computer viewer for adding an expansion card to the computer system, the apparatus comprising:

(a) a mechanism in the computer viewer for constructing in the memory, a card object specific to the expansion card and representing the behavior of the expansion card, the card object having a plurality of methods for manipulating system resource assignments for I/O functions on the expansion card;

(b) a mechanism in the computer viewer for using the card object to obtain system resource requirements;

(c) a central resource manager having a consistent interface to the card object and access to system resource allocation information for all I/O functions in the computer system;

(d) a mechanism in the computer viewer for using the central resource manager to obtain conflict free system resource assignments for I/O function on the expansion card each time the computer system is booted; and

(e) a mechanism in the computer viewer for using the card object to store system resource assignment data in the memory.

2. Apparatus according to claim 1 wherein the card object comprises a mechanism to obtain system resource requirements from the expansion card when the expansion card is an auto-configurable card.

3. Apparatus according to claim 1 wherein the card object comprises a mechanism to obtain system resource requirements from a configuration option database when the expansion card is a manually-configurable card.

4. Apparatus according to claim 1 wherein the card object comprises a mechanism for constructing a function resource object which encapsulates system resource requirements, possible system resource assignments and conflict-free system resource assignments for an I/O function on the expansion card.

5. Apparatus according to claim 4 wherein the central resource manager further comprises a conflict detector responsive to system resource requirements which detects system resource conflicts among expansion cards, and wherein the card object comprises means executable by the computer viewer for registering possible system resource assignments with the conflict detector.

6. Apparatus according to claim 5 wherein the card object comprises means executable by the computer viewer for obtaining conflict-free system resource assignments from the conflict detector.

7. Apparatus according to claim 4 wherein the card object comprises means executable by the computer viewer for storing the function resource objects in the memory.

8. Apparatus according to claim 4 wherein the card object comprises a linked list of function resource objects.

9. Apparatus according to claim 1 wherein the card object further comprises means executable by the computer viewer for enabling and disabling I/O functions on the expansion card.

10. Apparatus according to claim 1 wherein the card object further comprises means executable by the computer viewer for obtaining vendor information for the expansion card.

11. A method for use in a computer system having a memory, a plurality of system resources, and a computer viewer for adding an expansion card to the computer system, the method comprising the steps of:

(a) using the computer viewer to construct in the memory, a card object specific to the expansion card and representing the behavior of the expansion card, the card object having a plurality of methods for manipulating resource assignments for I/O functions on the expansion card;

(b) using the card object under control of the computer viewer to obtain system resource requirements;

(c) creating a central resource manager having a consistent interface to the card object and access to system resource allocation information for all I/O functions in the computer system;

(d) using the central resource manager under control of the computer viewer to obtain conflict free system resource assignments for I/O function on the expansion card each time the computer system is booted; and

(e) using the card object under control of the computer viewer to store system resource assignment data in the memory.

12. A method according to claim 11 wherein step (b) comprises the step of:

(b1) using the card object to obtain system resource requirements from the expansion card when the expansion card is an auto-configurable card.

13. A method according to claim 11 wherein step (b) comprises the step of:

(b2) using the card object to obtain system resource requirements from a configuration option database when the expansion card is a manually-configurable card.

14. A method according to claim 11 further comprising the step of:

(e) using the card object to construct a function resource object which encapsulates system resource requirements, possible system resource assignments and conflict-free system resource assignments for an I/O function on the expansion card.

15. A method according to claim 14 wherein the central resource manager further comprises a conflict detector responsive to system resource requirements which detects system resource conflicts among expansion cards, and wherein step (c) comprises the step of:

(c1) using the card object under control of the computer viewer to register possible resource assignments with the conflict detector.

16. A method according to claim 15 wherein step (c) comprises the step of:

(c2) using the card object under control of the computer viewer to obtain conflict-free system resource assignments from the conflict detector.

17. A method according to claim 14 wherein step (d) comprises the step of:

(d1) using the card object under control of the computer viewer to store the function resource objects in the memory.

18. A method according to claim 14 wherein step (a) comprises the step of:

(a1) constructing a linked list of function resource objects in the card object.

19. A method according to claim 14 wherein step (a) comprises the step of:

(a2) constructing a method for enabling and disabling I/O functions on the expansion card in the card object.

20. A method according to claim 14 wherein step (a) comprises the step of:

(a3) constructing a method for obtaining vendor information for the expansion card in the card object.

21. A computer program product for use in a computer system having a memory, a plurality of system resources, and a computer viewer for adding an expansion card to the computer system, the computer program product comprising a computer usable medium having computer readable program code thereon, including:

(a) program code for using the computer viewer to construct in the memory, a card object specific to the expansion card and representing the behavior of the expansion card, the card object having a plurality of methods for manipulating system resource assignments for I/O functions on the expansion card;

(b) program code for using the card object under control of the computer viewer to obtain system resource requirements;

(c) program code for creating a central resource manager having a consistent interface to the card object and access to system resource allocation information for all I/O functions in the system;

(d) program code for using the central resource manager under control of the computer viewer to obtain conflict free system resource assignments for I/O function on the expansion card each time the computer system is booted; and

(e) program code for using the card object under control of the computer viewer to store system resource assignment data in the memory.

22. A computer program product according to claim 21 wherein the program code for using the card object to obtain system resource requirements comprises program code for using the card object to obtain system resource requirements from the expansion card when the expansion card is an auto-configurable card.

23. A computer program product according to claim 21 wherein the program code for using the card object to obtain system resource requirements comprises program code for using the card object to obtain system resource requirements from a configuration option database when the expansion card is a manually-configurable card.

24. A computer program product according to claim 21 further comprising program code for using the card object to construct a function resource object which encapsulates system resource requirements, possible system resource assignments and conflict-free system resource assignments for an I/O function on the expansion card.

25. A computer program product according to claim 24 wherein the central resource manager further comprises a conflict detector responsive to system resource requirements which detects system resource conflicts among expansion cards, and the program code for obtaining conflict free resource assignments comprises program code for using the card object under control of the computer viewer to register possible system resource assignments with the conflict detector.

26. A computer program product according to claim 25 wherein the program code for obtaining conflict-free system resource assignments comprises program code for using the card object under control of the computer viewer to obtain conflict-free system resource assignments from the conflict detector.

27. A computer program product according to claim 24 wherein the program code for storing resource assignment data comprises program code for using the card object under control of the computer viewer to store the function resource objects in the memory.

28. A computer program product according to claim 24 wherein the program code for constructing the card object comprises program code for constructing a linked list of function resource objects in the card object.

29. A computer program product according to claim 24 wherein the program code for constructing the card object comprises a method for enabling and disabling I/O functions on the expansion card in the card object.

30. A computer program product according to claim 24 wherein the program code for constructing the card object comprises a method for obtaining vendor information for the expansion card in the card object.