Method and apparatus for processing interrupts

• US 6,772,257 B1
• Filed: 12/23/1999
• Issued: 08/03/2004
• Est. Priority Date: 12/23/1999
• Status: Expired due to Term

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Futral, William T.
• Primary Examiner(s): THAI, XUAN MARIAN
• Application Number:
  US09/471,941
• Time in Patent Office: 1,685 Days
• Field of Search: 710/48, 710/49, 710/260-269
• US Class Current: 710/260
• CPC Class Codes: G06F 13/24 using interrupt G06F13/32 takes precedence

Abstract

Briefly, in accordance with one embodiment of the invention, a method of processing interrupts, includes the following. An interrupt status message is transmitted after detecting a change in state of an interrupt.

Briefly, in accordance with another embodiment of the invention, a method of processing interrupts includes the following. Interrupts signals received after receiving an end of interrupt (EOI) signal are masked until an interrupt status message indicating that the interrupt state is current is received.

Claims

1. A system comprising:

a primary computing system;

a remote subsystem;

said primary computing system and said subsystem being coupled by a serial bus;

wherein said primary computing system includes a receiver to reconfigure serialized messages to be received by said primary computing system via the serial bus;

wherein said subsystem includes a converter to serialize messages to be transmitted to said primary computing system via the serial bus;

wherein said subsystem is further adapted to transmit an interrupt message if a change in interrupt state is detected; and

wherein said subsystem is further adapted to transmit an interrupt status message if an interrupt status request is detected.

2. The system of claim 1, wherein said converter is further adapted to transmit the interrupt message as an interrupt status message if a change in interrupt state is detected.

3. The system of claim 1, wherein said primary computing system includes a microprocessor to process the interrupts.

4. An apparatus comprising:

a converter to serialize messages to be transmitted to a primary computing system via a serial bus coupling said converter and said primary computing system;

said converter adapted to be employed in a remote subsystem;

said converter being further adapted to transmit an interrupt message to said primary computing system if a change in interrupt state of said subsystem is detected; and

wherein said converter is further adapted to transmit an interrupt status message if an interrupt status request is detected.

5. The system of claim 4, wherein said converter is further adapted to transmit the interrupt message as an interrupt status message if a change in interrupt state is detected.