Methods and computer systems for selection of a DSDT
View Patent ↗Methods and computer systems provide for the selection of a DSDT that accurately describes a current configuration of the computer system. Because the system configuration can change over time, such as due to hardware malfunctions or the addition or removal of hardware requiring a BIOS interface to software, multiple DSDTs are available for selection so that for each computer system configuration, an appropriate DSDT is available. Upon boot-up, the hardware of the computer system is analyzed to determine the set of available North Bridge chipset devices. An appropriate DSDT is then selected from a set of multiple DSDTs for the current computer system configuration.
1. A method of selecting a Differentiated System Description Table (DSDT) for use in a computer, comprising:
upon boot-up of the computer, analyzing the hardware of the computer to detect a set of north bridge chipset devices that are present;
accessing a store of multiple DSDTs;
detecting a DSDT applicable to the set of detected devices from the store of multiple DSDTs; and
copying the detected DSDT to a memory location.
2. The method of claim 1 , wherein the set of devices comprise scalability node controllers.
3. The method of claim 1 , wherein the set of devices comprise scalability port switches.
4. The method of claim 1 , wherein the set of devices comprise a server input and output hub.
5. The method of claim 1 , wherein analyzing the hardware comprises reading available chipset registers.
6. The method of claim 1 , wherein detecting a DSDT applicable to the set comprises parsing the multiple DSDTs to find a DSDT that provides an entry for each device of the set.
7. The method of claim 1 , further comprising storing a pointer to the memory location of the copied DSDT in a Root System Description Table (RSDT).
8. The method of claim 1 , further comprising updating values in the detected DSDT table by reading a store of each of the devices of the set.
9. A method for selecting a Differentiated System Description Table (DSDT) table in use by a computer, comprising:
upon a first boot-up, analyzing hardware of the computer to select a first DSDT table appropriate for a set of north bridge chipset devices that are found;
altering the set of devices of the computer; and
upon a re-start after altering the set of devices, analyzing the hardware of the computer to select a DSDT appropriate for the altered set of devices that are found.
10. The method of claim 9 , wherein altering the set of devices comprises partitioning between a set of scalability port switches.
11. The method of claim 9 , wherein altering the set of devices comprises failing a scalability port switch.
12. The method of claim 9 , wherein altering the set of devices comprises failing a scalability node controller.
13. The method of claim 9 , wherein altering the set of devices comprises adding a scalability node controller.
14. The method of claim 9 , wherein analyzing the hardware of the computer to select the first DSDT table comprises reading chipset registers of the devices.
15. The method of claim 9 , further comprising copying the selected DSDT appropriate for the set of devices that are found to a memory location.
16. A computer system, comprising:
a memory;
a set of north bridge chipset devices; and
a Basic Input and Output System (BIOS) providing a store of multiple Differentiated System Description Tables (DSDTs), the BIOS being configured to: analyze hardware of the computer to detect the set of north bridge chipset devices that are present;
access the store of multiple DSDTs;
detect a DSDT applicable to the set of detected devices from the store of multiple DSDTs; and
copy the detected DSDT to a location in the memory.
17. The computer system of claim 16 , wherein the BIOS is configured to analyze the hardware of the computer by reading chipset registers of the devices.
18. The computer system of claim 16 , wherein the BIOS is configured to detect a DSDT applicable to the set of detected devices by parsing the multiple DSDTs to find a DSDT that provides an entry for each device of the set.
19. A computer system comprising:
a set of north bridge chipset devices; and
a Basic Input and Output System(BIOS) providing a store of multiple Differentiated System Description Tables (DSDTs), the BIOS being configured to:
upon a boot-up, analyze hardware of the computer to select from the store of multiple DSDTs a DSDT table appropriate for a set of north bridge chipset devices that are found; and
upon a re-start occurring after an alteration to the set of devices, analyzing the hardware of the computer to select from the store of multiple DSDTs a DSDT table appropriate for the altered set of devices that are found.
20. The computer system of claim 19 , wherein the BIOS is configured to analyze the hardware of the computer by reading chipset registers of the devices.
21. The computer system of claim 19 , wherein the alteration to the set of devices is an elimination of a device.