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EFI Data Hub Specification v0.9

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EFI Data Hub Specification v0.9

Intel® Platform Innovation Framework for EFI Data Hub Specification

This specification defines the core code and services that are required for an implementation of the data hub in the Intel® Platform Innovation Framework for EFI (hereafter referred to as the “Framework”). The data hub is a volatile database that is intended as the major focus for the accumulation of manageability data. This specification does the following:

• Describes the basic components and the usage models of the Data Hub Protocol
• Defines the structure of the data record header and the high-level classes of data records
• Provides code definitions for the Data Hub Protocol and its member functions that are architecturally required by the Intel® Platform Innovation Framework for EFI Architecture Specification

Data hub subclasses are outside the scope of this document and are defined in other specifications.

Data Structure Descriptions

Intel® processors based on 32-bit Intel® architecture (IA-32) are “little endian” machines. This distinction means that the low-order byte of a multibyte data item in memory is at the lowest address, while the high-order byte is at the highest address. Processors of the Intel® Itanium® processor family may be configured for both “little endian” and “big endian” operation. All implementations designed to conform to this specification will use “little endian” operation.

In some memory layout descriptions, certain fields are marked reserved. Software must initialize such fields to zero and ignore them when read. On an update operation, software must preserve any reserved field.

Read the full EFI Data Hub Specification.