Datasheet

Integrated I/O (IIO) Configuration Registers
338 Intel
®
Xeon
®
Processor E7-2800/4800/8800 v2 Product Family
Datasheet Volume Two: Functional Description, February 2014
9:9
RO_V (Function 0-1)
RO (Function 2-7)
0x0
xor_raid6:
If set, specifies XOR with Galios Field Multiply Parity and Quotient
opcodes for RAID5 and RAID6 are supported. The opcodes are:
0x89 - XOR with Galios Field Multiply Generation
0x8A - XOR with Galios Field Multiply Validate
0x8B - XOR with Galios Field Multiply Update Generation
Notes:
When this bit is zero, the DMA engine will halt if it encounters a
descriptor with these opcodes.
8:8 RO 0x0
xor_raid5:
If set, specifies XOR without Galios Field Multiply parity only
opcodes for RAID5 are supported. The opcodes are:
0x87 - XOR Generation
0x88 - XOR Validate
Notes:
When this bit is zero, the DMA engine will halt if it encounters a
descriptor with these opcodes.
7:7 RO 0x1
extended_apic_id:
Set if 32b APIC IDs are supported.
1: 32b APIC IDs supported
0: 8b APIC IDs supported
6:6 RO 0x1
block_fill:
If set, specifies the Block Fill opcode is supported. The opcode is:
0x01 - Block Fill
Notes:
When this bit is zero, the DMA engine will abort if it encounters a
descriptor with these opcodes.
5:5 RO 0x1
move_crc:
If set, specifies Move and CRC opcodes are supported. The
opcodes are:
0x41 - Move and Generate CRC-32
0x42 - Move and Test CRC-32
0x43 - Move and Store CRC-32
Notes:
When this bit is zero, the DMA engine will abort if it encounters a
descriptor with these opcodes.
4:4 RW_O 0x1
dca:
If set, specifies DMA DCA operations are supported according to
the settings in the descriptors.
Notes:
When this bit is zero, the DMA engine ignores the DCA hints in
DMA descriptors.
This bit is RW_O to give bios the ability to turn off DCA operation
from Intel® Quick Data DMA.
Type: MEM PortID: 8’h7e
Bus: 0 Device: 4Function:0-7
Offset: 0x10
Bit Attr Default Description