Processor Configuration Registers
B/D/F/Type:
Address Offset:
Reset Value:
Access:
0/1/0–2/PCI
B4–B7h
00040000h
RW-O, RO
32 bits
Size:
Reset
Value
RST/
PWR
Bit
Access
Description
Slot Power Limit Scale (SPLS)
This field specifies the scale used for the Slot Power Limit Value.
00 = 1.0x
01 = 0.1x
10 = 0.01x
11 = 0.001x
16:15
RW-O
00b
00h
Uncore
Uncore
If this field is written, the link sends a Set_Slot_Power_Limit
message.
Slot Power Limit Value (SPLV)
In combination with the Slot Power Limit Scale value, specifies
the upper limit on power supplied by slot. Power limit (in Watts)
is calculated by multiplying the value in this field by the value in
the Slot Power Limit Scale field.
14:7
RW-O
If this field is written, the link sends a Set_Slot_Power_Limit
message.
Reserved for Hot-plug Capable (HPC)
6
5
RO
RO
0b
0b
Uncore
Uncore
When set to 1b, this bit indicates that this slot is capable of
supporting hot-plug operations.
Reserved for Hot-plug Surprise (HPS)
When set to 1b, this bit indicates that an adapter present in this
slot might be removed from the system without any prior
notification. This is a form factor specific capability. This bit is an
indication to the operating system to allow for such removal
without impacting continued software operation.
Reserved for Power Indicator Present (PIP)
4
3
2
RO
RO
RO
0b
0b
0b
Uncore
Uncore
Uncore
When set to 1b, this bit indicates that a Power Indicator is
electrically controlled by the chassis for this slot.
Reserved for Attention Indicator Present (AIP)
When set to 1b, this bit indicates that an Attention Indicator is
electrically controlled by the chassis.
Reserved for MRL Sensor Present (MSP)
When set to 1b, this bit indicates that an MRL Sensor is
implemented on the chassis for this slot.
Reserved for Power Controller Present (PCP)
When set to 1b, this bit indicates that a software programmable
Power Controller is implemented for this slot/adapter (depending
on form factor).
1
0
RO
RO
0b
0b
Uncore
Uncore
Reserved for Attention Button Present (ABP)
When set to 1b, this bit indicates that an Attention Button for this
slot is electrically controlled by the chassis.
120
Datasheet, Volume 2
INTEL [ INTEL ]
