Copyright
©
2013
congatec
AG
TU87m10
80/108
Feature
Options
Description
Maximum Read Request
Auto
128 Bytes
256 Bytes
512 Bytes
1024 Bytes
2048 Bytes
4096 Bytes
Set maximum read request size of PCI Express devices or allow system BIOS to select the value.
ASPM
Disabled
Auto
Force L0s
PCI Express Active State Power Management settings.
Extended Synch
Disabled
Enabled
If enabled, the generation of extended PCI Express synchronization patterns is allowed.
Link Training Retry
Disabled, 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)
10-10000
Default : 100
Defines number of microseconds software will wait before polling link training bit in the link status register. Value
ranges 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 is set to disabled.
Restore PCIe Registers
Enabled
Disabled
On non-PCI Express aware operating systems some devices may not be re-initialized correctly after S3. Setting this
node to Enabled restores PCI Express configuration on S3 resume.
Warning: Enabling this may cause issues with other hardware after S3 resume.
10.4.5.2 PIRQ Routing & IRQ Reservation Submenu
Feature
Options
Description
PIRQA
Auto
, IRQ3, IRQ4,
IRQ5, IRQ6,
IRQ10, IRQ11,
IRQ14, IRQ15
Set interrupt for selected PIRQ. Please refer to the board’s resource list for a detailed list of devices connected to the
respective PIRQ.
NOTE: These settings will only be effective while operating in PIC (non-IOAPIC) interrupt mode.
PIRQB
same as PIRQA
same as PIRQA
PIRQC
same as PIRQA
same as PIRQA
PIRQD
same as PIRQA
same as PIRQA
PIRQE
same as PIRQA
same as PIRQA
PIRQF
same as PIRQA
same as PIRQA
PIRQG
same as PIRQA
same as PIRQA
PIRQH
same as PIRQA
same as PIRQA
Reserve Legacy Interrupt 1
None
, IRQ3,
IRQ4, IRQ5, IRQ6,
IRQ10, IRQ11,
IRQ14, IRQ15
The interrupt reserved here will not be assigned to any PCI or PCI Express device and thus maybe available for some
legacy bus device.
Reserve Legacy Interrupt 2 same as Reserve
Legacy Interrupt 1
same as Reserve Legacy Interrupt 1