Pci Express Virtual Channel Capability - IDT 89HPES64H16G2 User Manual

IDT PCI to PCI Bridge and Proprietary Port Specific Registers

PCI Express Virtual Channel Capability

PCIEVCECAP - PCI Express VC Enhanced Capability Header (0x200)
Bit
Field
15:0
19:16
31:20
PVCCAP1- Port VC Capability 1 (0x204)
Bit
Field
2:0
3
6:4 LPEVCCNT
7
9:8
11:10 PATBLSIZ
31:12
PVCCAP2- Port VC Capability 2 (0x208)
Bit
Field
7:0 VCARBCAP
23:8
31:24 VCATBLOFF
PES64H16G2 User Manual
Field Default
Type
Name Value
CAPID RO 0x2
CAPVER RO 0x1
NXTPTR RWL Refer to sec-
tion Capabil-
ity Structures
on page 15-3.
Field Default
Type
Name Value
EVCCNT RWL
Reserved RO
RWL
Reserved RO
REFCLK RO
RWL
Reserved RO
Field Default
Type
Name Value
RO 0x0
Reserved RO 0x0
RO 0x0
Capability ID. The value of 0x2 indicates a virtual channel capabil-
ity structure.
Capability Version. The value of 0x1 indicates compatibility with
version 1 of the specification.
Next Pointer. Next capability pointer. The value of 0x0 terminates
the list.
0x0 Extended VC Count. A value 0x0 indicates that only the default
VC (VC0) is implemented.
0x0 Reserved field.
0x0 Low Priority Extended VC Count. Not supported (i.e., Time-
based WRR Port Arbitration is not implemented).
0x0 Reserved field.
0x0 Reference Clock. Not supported (i.e., Time-based WRR Port Arbi-
tration is not implemented).
0x2 Port Arbitration Table Entry Size. This field indicates the size of
the port arbitration table in the device. It is set to 0x2 to indicate a
table with 4-bit entries.
0x0 - (bit1) Port arbitration table is 1-bit
0x1 - (bit2) Port arbitration table is 2-bits
0x2 - (bit4) Port arbitration table is 4-bits
0x3 - (bit8) Port arbitration table is 8-bits
0x0 Reserved field.
VC Arbitration Capability. Not applicable (only the default VC 0 is
supported).
Reserved field.
VC Arbitration Table Offset. Not applicable (only the default VC 0
is supported).
16 - 42
Description
Description
Description
April 5, 2013