Sun Fire Physical Device Mapping
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Sun Fire Physical Device Mapping
The physical address represents the physical characteristics unique to the
device (such as the bus address or the slot number where the device is
installed).
Each physical device is referenced by its
node identifier
and
Sun
Fireplane agent identifier (AID)
AIDs range from 0 to 31 (0 to 1f, hexadecimal).
There is a mixture of ways that the platform numbers agents. obp
numbers in hex, POST numbers in decimal, solaris numbers
processors in decimal, and device paths are in hex.
Refer to the tables on the next two pages for AIDs
Node Mapping
The node identifier for standalone Sun Fire domains is always 0. Node
identifiers other than 0 will be used when wildcat comes online.
For example, the device tree entry is:
/ssm@0,0
System Board Mapping
CPU and memory AIDs range from 0 to 23 (0 to 17, hexadecimal).
Depending on the model, a Sun Fire domain can have up to six system
boards. Each system board can have up to four processors.
There are up to eight banks of memory per system board, two per CPU.
Each pair of banks is controlled by one memory management unit
(MMU). The MMU is co-packaged with its respective processor. Thus, the
AID for an MMU is the same as its processor AID but with a different
offset. The offset is 0 for processors and 400000 for memory.
Device tree entries for a CPU and associated memory is:
Node ID 0