Intel E7-8891 v2 CM8063601377422 User Manual

Product codes
CM8063601377422
Page of 504
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
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