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===== AoE boot firmware table ===== ==== Introduction ==== The AoE Boot Firmware Table (aBFT) is a block of information containing various parameters useful to the AoE boot process. It is the mechanism whereby the boot firmware conveys information about the boot device to the loaded operating system. ==== Location ==== The aBFT can be located by scanning through base memory (address 0x00000 to address 0x09FFFF) for the table header signature. The table must be aligned on a 16-byte boundary, and the checksum must be correct. ==== Conventions ==== The aBFT follows the structure of an ACPI table. All quantities are little-endian. All fields marked as reserved must be filled with zeroes. ==== Structure ==== ^ Field ^ Byte Offset ^ Byte Length ^ | Signature | 0 | 4 | | Length | 4 | 4 | | Revision | 8 | 1 | | Checksum | 9 | 1 | | OEMID | 10 | 6 | | OEM Table ID | 16 | 8 | | Reserved | 24 | 12 | | AoE Shelf | 36 | 2 | | AoE Slot | 38 | 1 | | Reserved | 39 | 1 | | MAC Address | 40 | 6 | | Reserved | 46 | 2 | == Signature == 'aBFT' signature for the AoE Boot Firmware Table. == Length == Length in bytes of the entire aBFT, including the signature. == Revision == Must be set to 1. == Checksum == Entire table must sum to zero. == OEMID == ACPI OEM ID. All unused trailing bytes must be zero. == OEM Table ID == For the aBFT the Table ID is the Manufacturer's Model ID. All unused trailing bytes must be zero. == AoE Shelf == Shelf number of the AoE disk used for boot. == AoE Slot == Slot number of the AoE disk used for boot. == MAC Address == Ethernet MAC address of the network card used for boot.


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