COMPUTER SYSTEM AND ABNORMALITY DETECTION CIRCUIT

• US 20100153602A1
• Filed: 12/04/2009
• Published: 06/17/2010
• Est. Priority Date: 12/12/2008
• Status: Active Grant

• Current Assignee: Socionext Inc.
• Original Assignee: Fujitsu Microelectronics Limited (Fujitsu Limited)
• Inventors: Nanri, Yousuke, KUME, Takayuki
• Granted Patent: US 8,700,835 B2
• Time in Patent Office: Days
• US Class Current: 710/110
• CPC Class Codes: G06F 13/4226 with asynchronous protocol

Abstract

A computer system includes multiple modules that perform communication via a bus, and abnormality detection circuits that monitor signals on the bus related to communication between the modules to detect a hang-up, wherein each of the abnormality detection circuits is arranged to correspond to a part of the multiple modules, and, when detecting the hang-up, generates and outputs a signal instructing reactivation only of the corresponding module.

Claims

1. A computer system comprising:

multiple modules configured to perform communication via a bus; and

abnormality detection circuits configured to monitor signals on the bus related to communication between the modules to detect a hang-up;

wherein

each of the abnormality detection circuits is arranged to correspond to a part of the multiple modules, and, when detecting the hang-up, generates and outputs a signal instructing reactivation only of the corresponding module.

2. The computer system according to claim 1, wherein the abnormality detection circuit is configured to detect the hang-up if a state in which no response from the corresponding module to a request continues for a predetermined period in the communication between the modules.

3. The computer system according to claim 2, wherein the abnormality detection circuit has a register configured to set the predetermined period for detecting the hang-up.

4. The computer system according to claim 1, wherein the abnormality detection circuit has a register configured to represent that the hang-up has been detected.

5. The computer system according to claim 1, wherein the abnormality detection circuit has a register configured to set whether or not to output a reset signal or an interrupt signal when the hang-up is detected.

6. The computer system according to claim 1, wherein the abnormality detection circuit has a response circuit configured to return a response related to communication instead of the hung-up module when the hang-up is detected.

7. The computer system according to claim 6, wherein the abnormality detection circuit has a register configured to set the kind of the response returned by the response circuit.

8. The computer system according to claim 1, comprising a register configured to represent hang-up occurrences in the system as a list on the basis of a result of hang-up detection in each of the abnormality detection circuits.

9. The computer system according to claim 1, wherein one abnormality detection circuit is independently arranged for each of the modules.

10. The computer system according to claim 1, wherein at least one abnormality detection circuit is arranged to correspond to a module group including two or more of the modules.

11. The computer system according to claim 1, wherein the abnormality detection circuits are arranged for the slave-side modules among the multiple modules.

12. The computer system according to claim 1, wherein the abnormality detection circuits are arranged for the master-side modules among the multiple modules.

13. The computer system according to claim 1, wherein a signal instructing reactivation of the module is generated and outputted outside the abnormality detection circuit.

14. An abnormality detection circuit which is included in a computer system having multiple modules that perform communication via a bus and that detects a hang-up for a part of modules among the multiple modules, the abnormality detection circuit comprising:

a detection circuit configured to monitor signals on the bus related to communication between the modules to detect a hang-up of a corresponding module; and

a signal generation circuit configured to, when the hang-up is detected by the detection circuit, generate and output a signal instructing reactivation only of the corresponding module;

wherein

the detection circuit detects the hang-up if no response from the corresponding module to a request continues for a predetermined period in the communication between the modules.

15. The abnormality detection circuit according to claim 14, comprising a register configured to set the predetermined period for the detection of the hang-up.

16. The abnormality detection circuit according to claim 14, comprising a register configured to represent that the hang-up of the corresponding module has been detected.

17. The abnormality detection circuit according to claim 14, comprising a register configured to set whether or not to output a reset signal or an interrupt signal when the hang-up of the corresponding module is detected.

18. The abnormality detection circuit according to claim 14, comprising a response circuit that, when the hang-up of the corresponding module is detected, is configured to return a response related to communication instead of the module.

19. The abnormality detection circuit according to claim 18, comprising a register configured to set the kind of the response returned by the response circuit.