Intel E7-8891 v2 CM8063601377422 User Manual

Product codes
CM8063601377422
Page of 504
Intel
®
 Xeon
® 
Processor E7-2800/4800/8800 v2 Product Family
317
Datasheet Volume Two: Functional Description, February 2014
Integrated I/O (IIO) Configuration Registers
14.4.14 INTPIN
14.4.15 DEVCFG
This DEVCFG is for Function 0 only. 
Type:
CFG
PortID:
N/A
Bus:
0
Device:
4Function:0-7
Offset:
0x3d
Bit
Attr
Default
Description
7:0
RW_O
0x1 (Function 0)
0x2 (Function 1)
0x3 (Function 2)
0x4 (Function 3)
0x1 (Function 4)
0x2 (Function 5)
0x3 (Function 6)
0x4 (Function 7)
cb_intpin0: (Function 0)
cb_intpin1: (Function 1)
cb_intpin2: (Function 2)
cb_intpin3: (Function 3)
cb_intpin4: (Function 4)
cb_intpin5: (Function 5)
cb_intpin6: (Function 6)
cb_intpin7: (Function 7)
BIOS writes this register to specify an association between a Intel® 
Quick Data DMA channel interrupt and a legacy interrupt pin INTA, 
INTB, INTC, or INTD. Hardware will use this value to remap this 
channel’s legacy interrupt to the legacy interrupt pin. OS will read 
this register to determine which virtual interrupt pin this function 
uses. 
01h: INTA 
02h: INTB 
03h: INTC 
04h: INTD 
Channel 0, 2, 4 and 6 share INTA, channels 1, 3, 5 and 7 share 
INTB. 
Type:
CFG
PortID:
N/A
Bus:
0
Device:
4Function:0
Offset:
0x60
Bit
Attr
Default
Description
15:12
RWS
0x0
numrd_xorgalois:
This register controls how many CL-size memory read requests for XOR with 
Galois Field Multiply Descriptor Operations that the DMA engine can have 
outstanding to main memory. Setting this field to 0h will allow maximum 
number of reads to be outstanding. Setting this to a value other than 0h 
(max 15 or Fh) will allow only that many memory reads to be
outstanding.
11:11
RW_O
0x0
f1extop_diden:
When set, this bit switches in the Function 1 Device ID that are typically used 
in storage applications. When clear, the function 1 DID remains at the default 
value associated with applications (for example, networking).
This bit should be written by BIOS prior to enumeration.
10:10
RW_O
0x0
f0extop_diden:
When set, this bit switches in the Function 0 Device ID that are typically used 
in storage applications. When clear, the function 0 DID remains at the default 
value associated with applications (e.g.,networking).
This bit should be written by BIOS prior to enumeration.
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