The IA-64 System Architecture - DIG64
The IA-64 System Architecture - DIG64
The IA-64 System Architecture - DIG64
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Virtual Memory Model: Example<br />
Virtual<br />
Address<br />
Space<br />
.<br />
2,3<br />
3<br />
1,2<br />
1<br />
P1,2,3,4<br />
Region 7 - One RID, no key<br />
Kernel - protected by Priv. level<br />
.<br />
Region 2 - One RID, protection via multiple keys<br />
Shared memory areas<br />
Region 1 - Same RID if shared<br />
Single address space for code<br />
P1 P2P3<br />
P4<br />
Region 0 - Different RID in each process<br />
Unique address spaces for data<br />
Flexible Virtual Memory <strong>Architecture</strong> Enables<br />
Variety Of Efficient OS Implementations<br />
®
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