301467-005 Datasheet, PDF (161/426 Pages) Intel Corporation – Express Chipset

Host-PCI Express* Bridge Registers (D1:F0)
(Intel® 82915G/82915P/82915PL Only)
R
8.1.43
RSTS—Root Status (D1:F0)
PCI Device:
Address Offset:
Default Value:
Access:
Size:
1
C0h
00000000h
RO, R/W/C
32 bits
This register provides information about PCI Express Root Complex specific parameters.
Bit
31:18
17
16
15:0
Access &
Default
RO
0b
R/W/C
0b
RO
0000h
Description
Reserved
PME Pending: This bit indicates that another PME is pending when the PME
Status bit is set. When the PME Status bit is cleared by software; the PME is
delivered by hardware by setting the PME Status bit again and updating the
Requestor ID appropriately. The PME pending bit is cleared by hardware if no
more PMEs are pending.
PME Status: This bit indicates that the requestor ID indicated in the PME
Requestor ID field asserted PME. Subsequent PMEs are kept pending until the
status register is cleared by writing a 1 to this field.
PME Requestor ID: This field indicates the PCI requestor ID of the last PME
requestor.
Datasheet
161