Datasheet

Processor Configuration Registers
304 Datasheet, Volume 2
2.19.10 PCU_MMIO_FREQ_CLIPPING_CAUSE_LOG Register
This register is the log of the frequency clipping cause in MMIO for both Power plane 0
(IA) and Power plane 1 (GT). The bit definitions are the same as in
PCU_MMIO_FREQ_CLIPPING_CAUSE_STATUS register; the processor will constantly
‘or’ in the status to give a log of any clipping since the last clear. Software can clear the
log by writing zeros to this register.
Note: There is no assurance of atomicity of software read-clear and hardware read-modify-
write; thus, there is a small chance of misreporting.
B/D/F/Type: 0/0/0/MCHBAR PCU
Address Offset: 5C24-5C27h
Default Value: 00000000h
Access: RW
Size: 32 bits
Bit Access
Reset
Value
RST/
PWR
Description
31 RW 00000000h Uncore
pp1_clipped
Set if the PP1 (GT) frequency requested was clipped.
30 RW 00000000h Reserved (RSVD)
29 RW 00000000h Uncore
pp1_clipped_non_turbo
Set if the PP1 (GT) frequency requested was clipped,
but current frequency is lower than RP1
(MAX_NON_TURBO).
28:25 RW 00000000h Reserved (RSVD)
24 RW 00000000h Uncore
pp1_clipped_edp
Set if the PP1 (GT) frequency requested was clipped by
EDP limit (Vmax, Iccmax, Reliability, and so on).
23 RW 00000000h Reserved (RSVD)
22 RW 00000000h Uncore
pp1_clipped_hot_vr
Set if the PP1 (GT) frequency requested was clipped by
HOT indication from VR on SVID.
21 RW 00000000h Uncore
p1_clipped_pl2
Set if the PP1 (GT) frequency requested was clipped by
PL2 (POWER_LIMIT_2) power limiting algorithm.
20-19 RW 00000000h Reserved (RSVD)
18 RW 00000000h Uncore
pp1_clipped_pl1
Set if the PP1 (GT) frequency requested was clipped by
PL1 (POWER_LIMIT_1) power limiting algorithm.
17 RW 00000000h Uncore
pp1_clipped_thermals
Set if the PP1 (GT) frequency requested was clipped by
internal Thermal Throttling algorithm.
16 RW 00000000h Uncore
pp1_clipped_ext_prochot
Set if the PP1 (GT) frequency requested was clipped by
external PROCHOT indication.
15 RW 00000000h Uncore
pp0_clipped
Set if the PP0 (IA) frequency requested by OS was
clipped.
14 RW 00000000h Uncore
pp0_clipped_n_core_turbo
Set if the PP0 (IA) frequency requested by OS was
clipped, but current frequency is lower than
MAX_TURBO[n-cores].