Datasheet

Processor Uncore Configuration Registers
498 Datasheet, Volume 2
4.4.4 PCU2 Registers
4.4.4.1 CPU_BUS_NUMBER—CPU Bus Number Register
This register is used by BIOS to write the Bus number for the socket. Pcode will use
these values to determine whether PECI accesses are local or downstream.
4.4.4.2 SA_TEMPERATURE—SA Temperature Register
SA temperature in degrees (C). This field is updated by FW.
4.4.4.3 DYNAMIC_PERF_POWER_CTL Register
This register effectively governs all major power saving engines and hueristics on the
die.
CPU_BUS_NUMBER
Bus: 1 Device: 10 Function: 2 Offset: 40h
Bit Attr
Reset
Value
Description
31 RW-LB 0b
Valid
Thisw field indicates whether the bus numbers have been initialized or not
30:16 RV 0h Reserved
15:8 RW-LB 00h
Bus Number 1
Bus number for non-IIO entities on the local socket
SA_TEMPERATURE
Bus: 1 Device: 10 Function: 2 Offset: 44h
Bit Attr
Reset
Value
Description
31:8 RV 0h Reserved
7:0 RO-V 00h
Temperature
PP0 temperature in degrees C.
DYNAMIC_PERF_POWER_CTL
Bus: 1 Device: 10 Function: 2 Offset: 64h
Bit Attr
Reset
Value
Description
31:30 RW-V 00b Reserved
29:26 RW-V 0000b
EEP_L_Override
This indicates a EEP L override. Value 0-15
25 RW-V 0b
EEP_L_Override_Enable
0 = Disable over ride
1 = Enable over ride
24 RW-V 0b
I-Turbo Override Enable
0 = Disable override
1 = Enable override
23 RW-V 0b
CST Demotion Override Enable
0 = Disable override
1 = Enable override