301467-005 Datasheet, PDF (168/426 Pages) Intel Corporation – Express Chipset

Host-PCI Express* Bridge Registers (D1:F0)
(Intel® 82915G/82915P/82915PL Only)
R
8.1.54
VC1RSTS—VC1 Resource Status (D1:F0)
PCI Device:
Address Offset:
Default Value:
Access:
Size:
1
126h
0000h
RO
16 bits
This register reports the Virtual Channel specific status.
Bit
Access &
Default
Description
15:2
Reserved
1
RO
VC1 Negotiation Pending
1b
0 = The VC negotiation is complete.
1 = The VC resource is still in the process of negotiation (initialization or
disabling).
This bit indicates the status of the process of Flow Control initialization. It is set by
default on Reset, as well as when the corresponding Virtual Channel is Disabled
or the Link is in the DL_Down state. It is cleared when the link successfully exits
the FC_INIT2 state
Before using a Virtual Channel, software must check whether the VC Negotiation
Pending fields for that Virtual Channel are cleared in both Components on a Link.
0
Reserved
8.1.55
RCLDECH—Root Complex Link Declaration Enhanced
Capability Header (D1:F0)
PCI Device:
Address Offset:
Default Value:
Access:
Size:
1
140h
00010005h
RO
32 bits
This capability declares links from this element (PCI Express* x16 Graphics Interface) to other
elements of the root complex component to which it belongs. See the PCI Express specification
for link/topology declaration requirements.
Bit
31:20
19:16
15:0
Access &
Default
Description
RO
000h
RO
1h
RO
0005h
Pointer to Next Capability: This is the last capability in the PCI Express*
extended capabilities list.
Link Declaration Capability Version: Hardwired to 1 to indicate compliances
with the 1.0a version of the PCI Express specification.
Extended Capability ID: Value of 0005h identifies this linked list item (capability
structure) as being for PCI Express Link Declaration Capability.
Note: See corresponding Egress Port Link Declaration Capability registers for diagram of Link
Declaration Topology.
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Datasheet