Hewlett-packard Development Company, L.p.

Hewlett-packard Company

Subramanian Ramesh

Matthew L Fischer

Thavatchai Makphaibulchoke

Bradley Gordon Culter

Raghuram Kota

A system and method for accessing an Advanced Configuration and Power Interface (ACPI) namespace nodal tree in a computer platform employing an ACPI-compatible implementation is disclosed.

System and method for accessing an advanced configuration and power interface (ACPI) namespace nodal tree

A system and method for loading an Advanced Configuration and Power Interface (ACPI) original equipment manufacturer (OEM) description table in a computer platform employing an ACPI-compatible implementation is disclosed. In one embodiment of the system, a storage structure is operably associated with the computer platform and contains a copy of an ACPI OEM description table in a packed form. An acquirer is operable to search the storage structure fop the ACPI OEM description table and call a swapper to complete the loading of the ACPI OEM description table by issuing a signature search request.

System and method for loading an advanced configuration and power interface (ACPI) original equipment manufacturer (OEM) description table

A system and method for implementing a fast reset of a computer system is described. In one implementation, the fast reset is implemented by adding a new ResetType to the EFIResetSystem( ) function. In particular, a third ResetType, i.e., 'EfiResetFast' (FAST option), is added, which is passed as a parameter when calling the EFIResetSystem( ) function. In another implementation, the fast reset is implemented using a new EFI function, referred to herein as 'EFIResetFast( )'. In either implementation, in response to a fast reset, the firmware skips several steps typically performed, including some of the core firmware construction, single cell initialization, memory testing, memory re-initialization, and partition creation, and proceeds directly to transfer of control of the platform to a software interface disposed between an OS and firmware.

System and method for executing a fast reset of a computer system

Computer data is transferred from a packed to an unpacked data structure in a computer that enforces aligned memory access and for which the associated compiler lacks a compile-time directive to pack data structures. In an exemplary embodiment, the invention is employed in the pre-processing of Advanced Configuration and Power Interface (ACPI) tables stored in little-endian format for use by a big-endian operating system.

Method for transferring a packed data structure to an unpacked data structure by copying the packed data using pointer

The bits comprising a computer data structure are reversed rapidly and efficiently using a combination of data partitioning and table look ups. In an exemplary embodiment, the invention is employed in the pre-processing of Advanced Configuration and Power Interface (ACPI) tables stored in little-endian format for use by a big-endian operating system.

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Plano, TX, United States of America

Subramanian Ramesh