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 computer readable medium having computer-executable instructions stored thereon which, when executed by a computer, cause the computer to:
analyze hardware of the computer upon boot-up of the computer to detect a set of north bridge chipset devices that are present;
access a store of multiple Differentiated System Description Tables (DSDT);
detect a DSDT applicable to the set of detected devices from the store of multiple DSDTs; and
copy the detected DSDT to a memory location.
2. The computer-readable medium of claim 1 , wherein the set of devices comprise scalability node controllers.
3. The computer-readable medium of claim 1 , wherein the set of devices comprise scalability port switches.
4. The computer-readable medium of claim 1 , wherein the set of devices comprise a server input and output hub.
5. The computer-readable medium of claim 1 , wherein analyzing the hardware comprises reading available chipset registers.
6. The computer-readable medium 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 computer-readable medium of claim 1 , comprising further computer-executable instructions which, when executed by the computer, cause the computer to store a pointer to the memory location of the copied DSDT in a Root System Description Table (RSDT).
8. The computer-readable medium of claim 1 , comprising further computer-executable instructions which, when executed by the computer, cause the computer to update values in the detected DSDT table by reading a store of each of the devices of the set.
9. A computer readable medium having computer-executable instructions stored thereon which, when executed by a computer, cause the computer to:
analyze hardware of the computer upon boot-up to select a first Differentiated System Description Table (DSDT) table appropriate for a set of north bridge chipset devices that are found;
detect an alteration of the set of devices of the computer; and
upon a re-start after detecting the alteration of the set of devices, to analyze the hardware of the computer to select a DSDT appropriate for the altered set of devices.
10. The computer-readable medium of claim 9 , wherein altering the set of devices comprises partitioning between a set of scalability port switches.
11. The computer-readable medium of claim 9 , wherein altering the set of devices comprises failing a scalability port switch.
12. The computer-readable medium of claim 9 , wherein altering the set of devices comprises failing a scalability node controller.
13. The computer-readable medium of claim 9 , wherein altering the set of devices comprises adding a scalability node controller.
14. The computer-readable medium 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 computer-readable medium of claim 9 , comprising further computer-executable instructions which, when executed by the computer, cause the computer to copy the selected DSDT appropriate for the set of devices that are found to a memory location.