Pci express and pci capabilities parameters – Altera Stratix V Avalon-ST User Manual
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Parameter
Value
Description
MSI-X Table
BAR Indicator
[2:0]
Specifies which one of a function’s BAR number. This field is
read-only. For 32-bit BARs, the legal range is 0–5. For 64-bit
BARs, the legal range is 0, 2, or 4.
MSI-X Pending
Bit Array (PBA)
Offset
[31:0]
Points to the MSI-X Pending Bit Array table. It is offset from
the BAR value indicated in MSI-X Table BAR Indicator. The
lower 3 bits of the PBA BIR are set to zero by software to form
a 32-bit qword-aligned offset. This field is read-only.
MSI-X PBA BAR
Indicator
[2:0]
Specifies which BAR number contains the MSI-X PBA. For
32-bit BARs, the legal range is 0–5. For 64-bit BARs, the legal
range is 0, 2, or 4. This field is read-only.
Legacy Interrupts
PF0 Interrupt
Pin
inta–intd
Applicable for PFs only to support legacy interrupts. When
enabled, the core receives interrupt indications from the
Application Layer on its
INTA_IN
,
INTB_IN
,
INTC_IN
and
INTD_IN
inputs, and sends out
Assert_INTx
or
Deassert_
INTx
messages on the link in response to their activation or
deactivation, respectively.
You can configure the Physical Functions with separate
interrupt pins. Or, both functions can share a common
interrupt pin.
PF1 Interrupt
Pin
inta–intd
PF0 Interrupt
Line
0-255
Defines the input to the interrupt controller (IRQ0 - IRQ15)
in the Root Port that is activated by each
Assert_INTx
message.
PF1 Interrupt
Line
0-255
Note:
1. Throughout this user guide, the terms word, dword and qword have the same meaning that they have
in the PCI Express Base Specification. A word is 16 bits, a dword is 32 bits, and a qword is 64 bits.
Related Information
PCI Express and PCI Capabilities Parameters
This group of parameters defines various capability properties of the IP core. Some of these parameters
are stored in the PCI Configuration Space - PCI Compatible Configuration Space. The byte offset
indicates the parameter address.
3-8
PCI Express and PCI Capabilities Parameters
UG-01097_sriov
2014.12.15
Altera Corporation
Parameter Settings