iAPX 432 Interface Processor Architecture Reference Manual
A context object is represented by a context access segment and an associated context data segment.
Context Access Segments
Diagranmatically, a context access segment is structured as shown belCM.
| = |
|
| = |
|
|
| entry |
|
| 1 |
|
|
| 1 | 1 |
|
| ||
| 8 | domain AD | > domain of definition | |||
| 1 | 1 |
|
| ||
|
| AS | AD | |||
| 1 | 1 |
|
| ||
|
| AS | AD | > entry access segment 2 | ||
| 1 | 1 |
|
| ||
| 1 | AS | AD | > entry access segment I | ||
| 1 | 1 |
|
| ||
|
| context AD | ||||
| 1 | 1 |
|
| ||
| ! |
| AD | > nessage | ||
| 1 | 1 |
|
| ||
| ! |
| AD | > | reserved | |
| 1 | 1 |
|
| ||
context |
| AD | > | reserved | ||
access | 1 | 1 |
|
| ||
segment
The context access segment, context data segment, and domain access descr iptors in the context must be created without delete rights. The entry access segment entries never bear delete rights.
The base rights field of a context access segment access descriptor is interpreted in the same manner as for all objects of base type access segment. The system rights field of a context access segment access descriptor is uninterpreted.
Context Data Segments
The only processor interpreted field in the context data segment is the process status field which contains a combination of process and context status. The form and interpretation of this field are described in the process data segment section.
The base rights field of a context data segment access descriptor is interpreted in the same manner as for all objects of base type data segment. The system rights field of a context data segment access descriptor is uninterpreted.
