
IBM3206K0424
Preliminary
IBM Processor for Network Resources
pnr25.chapt05.01
August 14, 2000
Processor Core (PCORE)
Page 453 of 676
Cache Control Registers  
Register 
Name
SPR 
Number
Source
POR value 
Notes 
dccr
1018
401 
X
’
00 00 00 00
’
dlcr
917
COBRA X
’
00 00 00 00
’
Bits 0-15 correspond to target tags 0-15, enabling auto data cache line locking 
dtwf
919
COBRA X
’
00 00 00 00
’
Bits 0-15 correspond to target tags 0-15, enabling target word first data cache fills 
iccr
1019
401 
X
’
00 00 00 00
’
ilcr
916
COBRA X
’
00 00 00 00
’
Bits 0-15 correspond to target tags 0-15, enabling auto instruction cache line lock-
ing 
itwf
918
COBRA X
’
00 00 00 00
’
Bits 0-15 correspond to target tags 0-15, enabling target word first instruction cache 
fills 
cdcbr
983
401 
Not implemented 
dcwr
954
401 
Not implemented 
icdbdr
979
401 
Not implemented 
Translation Registers  
Register 
Name
SPR 
Number
Source
POR value 
Notes 
sdr1 
25 
603 
X
’
00 00 00 00
’
Not Supported - translation disabled this pass 
sgr 
53 
401 
X
’
00 00 00 00
’
Has no affect this pass. All storage is non-guarded. 
sler 
55 
401 
Not Supported - writes ignored, reads as 
’
0
’
stt0 
912 
COBRA X'00 00 00 00' 
When IR=0 or DR=0, these registers are used to assign target tags to instruction or 
data memory accesses. The mapping is stt0(0:3) = 0x00000000 - 0x07FFFFFF 
through stt3(28:31) = 0xF8000000 - 0xFFFFFFFF. 
stt1 
913 
COBRA X'00 00 00 00' 
stt2 
914 
COBRA X'00 00 00 00' 
stt3 
915 
COBRA X'00 00 00 00' 
sr0-15 
NA 
603 
X'00 00 00 00' 
Not Supported - translation disabled this pass 
dbat0u 
536 
603 
X'00 00 00 00' 
Not Supported - translation disabled this pass 
dbat0l 
537 
603 
X'00 00 00 00' 
Not Supported - translation disabled this pass 
dbat1u 
538 
603 
X'00 00 00 00' 
Not Supported - translation disabled this pass 
dbat1l 
539 
603 
X'00 00 00 00' 
Not Supported - translation disabled this pass 
dbat2u 
540 
603 
X'00 00 00 00' 
Not Supported - translation disabled this pass 
dbat2l 
541 
603 
X'00 00 00 00' 
Not Supported - translation disabled this pass 
dbat3u 
542 
603 
X'00 00 00 00' 
Not Supported - translation disabled this pass 
dbat3l 
543 
603 
X'00 00 00 00' 
Not Supported - translation disabled this pass 
dbat4u 
568 
COBRA X'00 00 00 00' 
Not Supported - translation disabled this pass 
dbat4l 
569 
COBRA X'00 00 00 00' 
Not Supported - translation disabled this pass 
dbat5u 
570 
COBRA X'00 00 00 00' 
Not Supported - translation disabled this pass 
dbat5l 
571 
COBRA X'00 00 00 00' 
Not Supported - translation disabled this pass