Datasheet

Gigabit LAN Configuration Registers
Intel® Xeon® Processor D-1500 Product Family 233
Datasheet - Volume 1 of 4: Integrated Platform Controller Hub
March 2015
6.1.24 PMCS—PCI Power Management Control and Status
Register (Gigabit LAN—D25:F0)
Address Offset: CCh–CDh Attribute: R/WC, R/W, RO
Default Value: See bit description Size: 16 bits
Function Level Reset:No (Bit 8 only)
6.1.25 DR—Data Register (Gigabit LAN—D25:F0)
Address Offset: CFh Attribute: RO
Default Value: See bit description Size: 8 bits
Bit Description
15 PME Status (PMES) — R/WC. This bit is set to 1 when the function detects a wake-up event
independent of the state of the PMEE bit. Writing a 1 will clear this bit.
14:13 Data Scale (DSC) — RO. This field indicates the scaling factor to be used when interpreting the
value of the Data register.
For the GbE LAN and common functions this field equals 01b (indicating 0.1 watt units) if the PM is
enabled in the NVM, and the Data_Select field is set to 0, 3, 4, 7, (or 8 for Function 0). Else it equals
00b.
For the manageability functions this field equals 10b (indicating 0.01 watt units) if the PM is enabled
in the NVM, and the Data_Select field is set to 0, 3, 4, 7. Else it equals 00b.
12:9 Data Select (DSL) — R/W. This four-bit field is used to select which data is to be reported through
the Data register (offset CFh) and Data_Scale field. These bits are writeable only when the Power
Management is enabled using NVM.
0h = D0 Power Consumption
3h = D3 Power Consumption
4h = D0 Power Dissipation
7h = D3 Power Dissipation
8h = Common Power
All other values are reserved.
8 PME Enable (PMEE) — R/W. If Power Management is enabled in the NVM, writing a 1 to this
register will enable Wakeup. If Power Management is disabled in the NVM, writing a 1 to this bit has
no affect, and will not set the bit to 1. This bit is not reset by Function Level Reset.
7:4 Reserved – Returns a value of 0000.
3 No Soft Reset (NSR) — RO. Defines if the device executed internal reset on the transition to D0.
the LAN controller always reports 0 in this field.
2 Reserved – Returns a value of 0b.
1:0 Power State (PS) — R/W. This field is used both to determine the current power state of the GbE
LAN Controller and to set a new power state. The values are:
00 = D0 state (default)
01 = Ignored
10 = Ignored
11 = D3 state (Power Management must be enabled in the NVM or this cycle will be ignored).
Bit Description
7:0 Reported Data (RD) — RO. This register is used to report power consumption and heat dissipation.
This register is controlled by the Data_Select field in the PMCS (Offset CCh, bits 12:9), and the
power scale is reported in the Data_Scale field in the PMCS (Offset CCh, bits 14:13). The data of this
field is loaded from the NVM if PM is enabled in the NVM or with a default value of 00h otherwise.