IA-64 : Altix
These pages relate to porting FreeBSD/ia64 to the SGI Altix 350.
Physical Address Space:
A 50-bit physical address is decoded as follows:
bits |
what |
Description |
35:0 |
Node Offset |
These bits point to a specific byte location within one of the four 64-GB spaces of the SHub |
37:36 |
Address Space (AS) |
00=MMR/resource space; 01=GET space; 10=AMO space; 11=Cacheable memory |
49:38 |
Node ID |
Bit 38 indicates the node type. A value of 0 indicates a processor node. Bit 49 is always 0 |
Alternatively:
From |
To |
Size |
Description |
0x0000000000 |
0x07ffffffff |
32GB |
Local resource space |
0x0800000000 |
0x0fffffffff |
32GB |
Global MMR space |
0x1000000000 |
0x1fffffffff |
64GB |
GET space |
0x2000000000 |
0x2fffffffff |
64GB |
AMO space |
0x3000000000 |
0x3fffffffff |
64GB |
Cacheable memory space |