cExpress-HL
Page 59
Feature
Options
Description
4096 Bytes
PCI Express Link Register Settings
Info only
ASPM Support
WARNING: Enabling ASPM may cause some
PCI-E devices to fail
Disabled
Auto
Force L0s
Set the ASPM Level: Force L0s - Force all links to L0s
Auto - BIOS auto configure
Disabled - Disables ASPM
Extended Synch
Disabled
Enabled
If enabled, allows generation of Extended Synchronization
patterns.
Link Training Retry
Disable
2
3
5
Defines number of retry attempts software will take to retrain
the link if previous training attempt was unsuccessful.
Link Training Timeout (Us)
100
Defines number of microseconds software will wait before
polling 'Link Training' bit in Link Status register. Value range
from 10 to 10000 uS.
Unpopulated Links
Keep Link ON
Disabled
In order to save power, software will disable unpopulated PCI
Express links if this option set to Disabled.
Restore PCIE Registers
Enabled
Disabled
On non-PCI Express aware OSes (pre Windows Vista) some
devices may not be correctly reinitialized after S3. Enabling
this restores PCI Express device configurations on S3 resume.
Warning: Enabling this may cause issues with other hardware
after S3 resume.
PCIe Configuration
Info only
PCIe Configuration
Submenu
7.3.7.1
PCI and PCIe > PCIe Configuration
Feature
Options
Description
PCIe Configuration
Info only
PCI Express Clock Gating
Disable
Enable
Enable / Disable PCI Express Clock Gating for each root port.
DMI Link ASPM Control
Disable
Enable
The control of Active State Power Management on both NB side
and SB side of the DMI Link.
DMI Link Extended Synch Control
Disable
Enable
The control of Extended Synch on SB side of the DMI Link.
PCIe-USB Glitch W/A
Disable
Enable
PCIe-USB Glitch W/A for bad USB device(s) connected behind
PCIE/PEG Port.
PCIE Root Port Function Swapping
Disable
Enable
Enable / Disable PCI Express PCI Express Root Port Function
Swapping.
Subtractive Decode
Disable
Enable
Enable / Disable PCI Express Subtractive Decode.
PCIE Ports 1-4 Configuration
4x1 Port
1X2 2X1 Port
2X2 Port
1X4 Port
To configure PCI-E Port 1-4 of PCH.
[4X1] : Port 1-4 (x1) and Port 8 (x1)
[1x2 2x1]: Port 1 (x2), Port 2 (disabled), Ports 3 and Port 4 (x1)
[2x2] : Port 1-2 (x2) and Port 3-4 (x2) / [1x4]:Port 1 (x4),
Ports 2-4 (disable)
PCI Express Root Port 1~4
Submenu
Configure PCI Express Root Port 1~4 setting.
