SBus Physical Address Space
The following table shows the physical address space layout of the Sun UltraSPARC 2 computer. A physical address on the UltraSPARC 2 model consists of 41 bits. The 41-bit physical address space is further broken down into multiple 33-bit address spaces identified by PA(40:33).
Table A–1 Device Physical Space in the Ultra 2|
PA(40:33) |
33-bit Space |
Usage |
|---|---|---|
|
0x0 |
0x000000000 - 0x07FFFFFFF |
2 Gbytes main memory |
|
0x80 – 0xDF |
Reserved on Ultra 2 |
Reserved on Ultra 2 |
|
0xE0 |
Processor 0 |
Processor 0 |
|
0xE1 |
Processor 1 |
Processor 1 |
|
0xE2 – 0xFD |
Reserved on Ultra 2 |
Reserved on Ultra 2 |
|
0xFE |
0x000000000 - 0x1FFFFFFFF |
UPA Slave (FFB) |
|
0xFF |
0x000000000 - 0x0FFFFFFFF |
System I/O space |
|
|
0x100000000 - 0x10FFFFFFF |
SBus Slot 0 |
|
|
0x110000000 - 0x11FFFFFFF |
SBus Slot 1 |
|
|
0x120000000 - 0x12FFFFFFF |
SBus Slot 2 |
|
|
0x130000000 - 0x13FFFFFFF |
SBus Slot 3 |
|
|
0x1D0000000 - 0x1DFFFFFFF |
SBus Slot D |
|
|
0x1E0000000 - 0x1EFFFFFFF |
SBus Slot E |
|
|
0x1F0000000 - 0x1FFFFFFFF |
SBus Slot F |
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