Intel E7-8870 v2 CM8063601272006 用户手册
产品代码
CM8063601272006
Intel
®
Xeon
®
Processor E7-2800/4800/8800 v2 Product Family
225
Datasheet Volume Two: Functional Description, February 2014
Integrated I/O (IIO) Configuration Registers
5:5
WO
0x0
retrain_link:
A write of 1 to this bit initiates link retraining in the given PCI
Express/DMI port by directing the LTSSM to the recovery state if
the current state is [L0, L0s or L1]. If the current state is anything
other than L0, L0s, L1 then a write to this bit does nothing. This bit
always returns 0 when read.It is permitted to write 1b to this bit
while simultaneously writing modified values to other fields in this
register. If the LTSSM is not already in Recovery or Configuration,
the resulting Link training must use the modified values. If the
LTSSM is already in Recovery or Configuration, the modified values
are not required to affect the Link training that’s already in
progress.
4:4
RW
0x0
link_disable:
This field controls whether the link associated with the PCI
Express/DMI port is enabled or disabled. When this bit is a 1, a
previously configured link would return to the ’disabled’ state as
defined in the PCI Express Base Specification, Revision 2.0. When
this bit is clear, an LTSSM in the ’disabled’ state goes back to the
detect state.
0: Enables the link associated with the PCI Express port
1: Disables the link associated with the PCI Express port
0: Enables the link associated with the PCI Express port
1: Disables the link associated with the PCI Express port
3:3
RO
0x0
read_completion_boundary:
Set to zero to indicate IIO could return read completions at 64B
boundaries
1:0
RW_V (Function 0)
RW (Function 1-3)
RW (Function 1-3)
0x0
active_state_link_pm_control:
When 01b or 11b, L0s on transmitter is enabled, otherwise it is
disabled. 10 and 11 enables L1 ASPM.
Type:
CFG
PortID:
N/A
Bus:
0
Device:
0Function:0 (DMI2 Mode)
Offset:
0x1b0
Bus:
0
Device:
0Function:0 (PCIe* Mode)
Bus:
0
Device:
2Function:0-3
Bus:
0
Device:
3Function:0-3
Offset:
0xa0
Bit
Attr
Default
Description