IBM powerpc 750gx User Manual
User’s Manual
IBM PowerPC 750GX and 750GL RISC Microprocessor
gx_05.fm.(1.2)
March 27, 2006
March 27, 2006
Memory Management
Page 185 of 377
Figure 5-3. 750GX Microprocessor DMMU Block Diagram
DTLB
DBAT Array
0
63
127
Tag
PA[0–19]
Data Cache
Select
Data Cache
Compare
Compare
Compare
0
7
A[20–31]
Hit/Miss
Segment Registers
•
•
•
0
15
DBAT0U
DBAT0L
DBAT7U
DBAT7L
•
•
X
PA[0–31]
SDR1
SPR 25
EA[0–14]
EA[0–3]
Select
EA[4–19]
EA[0–19]
Page Table
Search Logic
EA[0–19]
A[20–26]
PA[0–19]
DMMU
Load/Store
Unit
7
0