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1. WO2002027471 - PROCEDE ET DISPOSITIF PERMETTANT D'INITIALISER L'ENVIRONNEMENT D'EXPLOITATION D'UN SOUS-SYSTEME AUTONOME DANS UN SYSTEME INFORMATIQUE SANS INTERVENTION DU SYSTEME D'EXPLOITATION PRINCIPAL

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CLAIMS
What is claimed is:

1. A method for booting a subsystem, comprising:
retrieving a subsystem boot indicator; and
transferring information to the subsystem based on the subsystem boot indicator.

2. The method according to claim 1, wherein the subsystem boot indicator is located in a non-volatile storage device.

3. The method according to claim 2, wherein the non-volatile storage device is located within the subsystem.

4. The method according to claim 1, wherein transferring information to the subsystem is performed without involvement of a main system operating system.

5. The method according to claim 4, wherein transferring information to the subsystem is performed over a bus whose width is less than that of the main system.

6. The method according to claim 4, wherein transferring information to the subsystem is performed over a communication link whose bandwidth is less than that of the main system.

7. The method according to claim 1 , wherein transferring information to the subsystem is transferring information to a memory accessible by the subsystem.

8. A method comprising:
starting a boot up of a system;
retrieving a boot indicator;
transferring information inaccessible to a subsystem to a location accessible by the subsystem based upon the boot indicator; and
shutting down the system.

9. The method according to claim 8, wherein shutting down the system occurs before a main operating system for the system has substantially started executing.

10. The method according to claim 8, wherein shutting down the system does not shut down the subsystem.

1 1. The method according to claim 8, wherein the location is a memory location.

12. A machine-readable medium having stored thereon instructions, which when executed by a processor, causes said processor to perform the following:
retrieve a subsystem boot indicator; and
transfer information to a subsystem based on the subsystem boot indicator.

13. The machine-readable medium according to claim 12, wherein transferring the information to a subsystem comprises transferring the information to a storage accessible by the subsystem.

14. The machine-readable medium according to claim 12, wherein retrieving the subsystem boot indicator is retrieving the subsystem boot indicator from a non-volatile storage device.

15. A method for booting a subsystem, comprising:
retrieving a subsystem boot indicator;
determining from the retrieved subsystem boot indicator whether to perform a boot; and
performing a requested boot.

16. The method of claim 15, wherein performing a requested boot comprises:
retrieving information from a main system storage;
transferring the retrieved information to the subsystem;
storing the transferred information in a location accessible by the subsystem; and booting the subsystem from the stored information in the location accessible by the subsystem.

17. The method of claim 16, wherein retrieving information and transferring the retrieved information is substantially performed by a main system resource.

18. The method of claim 16, wherein retrieving information and transferring the retrieved information is substantially performed by a subsystem resource.

19. The method of claim 15, wherein retrieving the subsystem boot indicator comprises retrieving a subsystem boot indicator from the subsystem to be booted.

20. A booting system comprising:
a main system;
a subsystem coupled to the main system;
a main storage device accessible by the main system;
a subsystem storage device accessible by the subsystem;
a subsystem boot indicator; and
a controller coupled to the main system and the subsystem.

21. The system of claim 20, wherein the main storage device is a non-volatile memory storage device.

22. The system of claim 20, wherein the subsystem storage device is a volatile memory device.

23. The system of claim 20, wherein the subsystem boot indicator is accessible by the controller.

24. An apparatus for booting a subsystem, comprising:
means for retrieving a subsystem boot indicator;
means for determining from the retrieved subsystem boot indicator whether to perform a boot; and
means for performing a requested boot.

25. The apparatus of claim 24, wherein means for performing a requested boot comprises: means for allowing a subsystem access to a main system storage;
means for retrieving information from the main system storage;
means for transferring the retrieved information to the subsystem;
means for storing the transferred information in a location accessible by the subsystem; and
means for booting the subsystem from the stored information in the location accessible by the subsystem.

26. The apparatus of claim 24, wherein means for performing a requested boot comprises: means for allowing a main system access to a main system storage;
means for retrieving information from the main system storage;
means for transferring the retrieved information to the subsystem;
means for storing the transferred information in a location accessible by the subsystem; and
means for booting the subsystem from the stored information in the location accessible by the subsystem.

27. A computer based system comprising:
a main system with a first storage device, the main system capable of running a main operating system;
a subsystem with a second storage device;
a subsystem boot indicator; and a boot up controller capable of accessing the subsystem boot indicator and initiating a booting of the subsystem based upon the subsystem boot indicator.

28. The computer based system according to claim 27, wherein the booting of the subsystem comprises:
means for retrieving information from the first storage device;
means for transferring the retrieved information to the second storage device; and means for booting the subsystem using the information in the second storage device.

29. The computer based system according to claim 28, wherein means for retrieving information and means for transferring the retrieved information is performed substantially by a main system resource without the use of the main operating system.

30. The computer based system according to claim 28, wherein means for retrieving information and means for transferring the retrieved information is substantially performed by a subsystem resource.