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Address Map
Table A–1 Physical Address Map (Byte/Word Mode Disabled)
21164 Address
87.2000.0000 – 87.3FFF.FFFF
87.4000.0000 – 87.4FFF.FFFF
87.5000.0000 – 87.5FFF.FFFF
87.6000.0000 – 87.6FFF.FFFF
87.7000.0000 – 87.7FFF.FFFF
87.8000.0000 – 87.8FFF.FFFF
87.9000.0000 – 87.9FFF.FFFF
87.A000.0000 – 87.AFFF.FFFF
87.B000.0000 – 87.FFFF.FFFF
1
All addresses in the range of 80.0000.0000 and 8F.FFFF.FFFF are aliased. Address bits 36 through
38 are ignored in the address.
Table A–2 shows system address mapping operations when IOA_BEN equals 1
(byte/word operation enabled).
Table A–2 Physical Address Map (Byte/Word Mode Enabled)
21164 Address
00.000.0000 – 01.FFFF.FFFF
E.0000.0000 – E.FFFF.FFFF
80.0000.0000 – 83.FFFF.FFFF
84.0000.0000 – 84.FFFF.FFFF
85.0000.0000 – 85.7FFF.FFFF
85.8000.0000 – 85.BFFF.FFFF
85.C000.0000 – 85.FFFF.FFFF
86.0000.0000 – 86.FFFF.FFFF
87.0000.0000 – 87.1FFF.FFFF
87.2000.0000 – 87.3FFF.FFFF
87.4000.0000 – 87.4FFF.FFFF
87.5000.0000 – 87.5FFF.FFFF
System Address Space
A–2
1
Size (GB)
0.50
0.25
0.25
0.25
0.25
0.25
0.25
0.25
1.25
Size (GB)
8.00
4.00
16.00
4.00
2.00
1.00
1.00
4.00
0.50
0.50
0.25
0.25
Selection
PCI special/interrupt acknowledge
21174 main CSRs
21174 memory control CSRs
21174 PCI address translation
Reserved
21174 miscellaneous CSRs
21174 power management CSRs
21174 interrupt control CSRs
Reserved
Selection
Main memory
Dummy memory region
PCI sparse memory region 0, 512MB
PCI sparse memory region 1, 128MB
PCI sparse memory region 2, 64MB
PCI sparse I/O space region A, 32MB
PCI sparse I/O space region B, 32MB
PCI dense memory
PCI sparse configuration space
PCI special/interrupt acknowledge
21174 main CSRs
21174 memory control CSRs
(Sheet 2 of 2)
(Sheet 1 of 2)
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