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User’s Manual
IBM PowerPC 750GX and 750GL RISC Microprocessor
Memory Management
Page 184 of 377
gx_05.fm.(1.2)
March 27, 2006
Figure 5-2. PowerPC 750GX Microprocessor IMMU Block Diagram
BPU
ITLB
IBAT Array
0
63
127
Tag
PA[0–19]
Instruction Cache
Select
Instruction Cache
Compare
Compare
Compare
0
7
Instruction
Unit
A[20–31]
Hit/Miss
Segment Registers
•
•
•
0
15
IBAT0U
IBAT0L
IBAT7U
IBAT7L
•
•
X
PA[0–31]
SDR1 SPR25
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]
IMMU
7
0