Processor Configuration Registers
214
Datasheet, Volume 2
2.17.2
PM_CMD_PWR—Power Management Command Power
Register
This register defines the power contribution of each command - ACT+PRE, CAS-read
and CAS write. Assumption is that the ACT is always followed by a PRE (although not
immediately), and REF commands are issued in a fixed rate and there is no need to
count them. The register has three 8-bit fields.
2.17.3
PM_BW_LIMIT_config—BW Limit Configuration Register
This register defines the BW throttling at temperature.
Note that the field “BW_limit_tf may not be changed in run-time. Other fields may be
changed in run-time.
B/D/F/Type:
0/0/0/MCHBAR_MCBCAST
Address Offset:
4F84–4F87h
Reset Value:
00000000h
Access:
RW-LV
Size:
32 bits
BIOS Optimal Default
00h
Bit
Attr
Reset
Value
RST/
PWR
Description
31:24
RO
0h
Reserved
23:16
RW-LV
00h
Uncore
Power contribution of CAS Write command (PWR_CAS_W)
15:8
RW-LV
00h
Uncore
Power contribution of CAS Read command (PWR_CAS_R)
7:0
RW-LV
00h
Uncore
Power contribution of RAS command and PRE command
(PWR_RAS_PRE)
Power contribution of RAS command and PRE command. The value
should be the sum of the two commands, assuming that each RAS
command for a given page is followed by a PRE command to the
same page in the near future.
B/D/F/Type:
0/0/0/MCHBAR_MCBCAST
Address Offset:
4F88–4F8Bh
Reset Value:
FFFF03FFh
Access:
RW-L
Size:
32 bits
BIOS Optimal Default
00h
Bit
Attr
Reset
Value
RST/
PWR
Description
31:24
RW-L
FFh
Uncore
BW limit when rank is hot (BW_limit_hot)
The number of transactions allowed per rank when status of rank is
hot.
Range = 0–255h
23:16
RW-L
FFh
Uncore
BW limit when rank is warm (BW_limit_warm)
The number of transactions allowed per rank when status of rank is
warm.
Range = 0–255h
15:10
RO
0h
Reserved
9:0
RW-L
3FFh
Uncore
BW limit time frame (BW_limit_tf)
Time frame in which the BW limit is enforced, in DCLK cycles.
Range = 1–1023h
Note that the field “BW_limit_tf may not be changed in run-time.
Содержание 2ND GENERATION CORE PROCESSOR FAMILY DESKTOP - VOLUME 2 01-2011
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