Host-Secondary PCI Express* Bridge Registers (D6:F0)
230 Datasheet
8.25 PM_CAPID1—Power Management Capabilities
B/D/F/Type: 0/6/0/PCI
Address Offset: 80–83h
Default Value: C8039001h
Access: RO
Size: 32 bits
1RW0b
SERR Enable (SERREN):
0 = No forwarding of error messages from secondary side to primary side that
could result in an SERR.
1 = ERR_COR, ERR_NONFATAL, and ERR_FATAL messages result in SERR
message when individually enabled by the Root Control register.
0RW0b
Parity Error Response Enable (PEREN): Controls whether or not the Master
Data Parity Error bit in the Secondary Status register is set when the MCH
receives across the link (upstream) a Read Data Completion Poisoned
Transaction Layer Packet.
0 = Master Data Parity Error bit in Secondary Status register can NOT be set.
1 = Master Data Parity Error bit in Secondary Status register CAN be set.
Bit Access
Default
Value
Description
Bit Access
Default
Value
Description
31:27 RO 19h
PME Support (PMES): This field indicates the power states in which this device
may indicate PME wake via PCI Express messaging. D0, D3hot & D3cold. This
device is not required to do anything to support D3hot and D3cold, it simply
must report that those states are supported. Refer to the PCI Power
Management 1.1 specification for encoding explanation and other power
management details.
26 RO 0b
D2 Power State Support (D2PSS): Hardwired to 0 to indicate that the D2
power management state is NOT supported.
25 RO 0b
D1 Power State Support (D1PSS): Hardwired to 0 to indicate that the D1
power management state is NOT supported.
24:22 RO 000b
Auxiliary Current (AUXC): Hardwired to 0 to indicate that there are no
3.3Vaux auxiliary current requirements.
21 RO 0b
Device Specific Initialization (DSI): Hardwired to 0 to indicate that special
initialization of this device is NOT required before generic class device driver is to
use it.
20 RO 0b Auxiliary Power Source (APS): Hardwired to 0.
19 RO 0b
PME Clock (PMECLK): Hardwired to 0 to indicate this device does NOT support
PMEB generation.
18:16 RO 011b
PCI PM CAP Version (PCIPMCV): A value of 011b indicates that this function
complies with revision 1.2 of the PCI Power Management Interface Specification.
15:8 RO 90h
Pointer to Next Capability (PNC): This contains a pointer to the next item in
the capabilities list. If MSICH (CAPL[0] @ 7Fh) is 0, then the next item in the
capabilities list is the Message Signaled Interrupts (MSI) capability at 90h.
7:0 RO 01h
Capability ID (CID): Value of 01h identifies this linked list item (capability
structure) as being for PCI Power Management registers.
