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Processor Configuration Registers
252
Datasheet, Volume 2
2.15.2
CRDTCTL4—Credit Control 4 Register
This register will have the minimum Read Return Tracker credits for each of the 
PEG/DMI/GSA streams.
B/D/F/Type:
0/0/0/MCHBAR IMPH
Address Offset:
7410–7413h
Reset Value:
00000017h
Access:
RW-L
Size:
32 bits
Bit
Access
Reset 
Value
RST/
PWR
Description
31:6
RO
0h
Uncore
Reserved (RSVD)
5:0
RW-L
17h
Uncore
Read Return Tracker Shared Credits (RDRT_SHRD) 
This field indicates the number of credits that are in the RDRTRN 
shared pool. BIOS should configure this field to a value that is 
equal to 64 minus the sum of all minimum dedicated RDRTN 
credits.