參數(shù)資料
型號: ARM610
廠商: Mitel Networks Corporation
英文描述: General Purpose 32-Bit Microprocessor with 4kByte Cache,Write Buffer and Memory Management Unit(通用32位微處理器(帶4K字節(jié)緩存,寫緩沖器和存儲器管理單元))
中文描述: 通用32位微處理器4KB的高速緩存,寫緩沖器和存儲器管理單元(通用32位微處理器(帶4K的字節(jié)緩存,寫緩沖器和存儲器管理單元))
文件頁數(shù): 118/174頁
文件大?。?/td> 694K
代理商: ARM610
Memory Management Unit
ARM610 Data Sheet
9-14
9.14 Domain Access Control
MMU accesses are primarily controlled via domains. There are 16 domains, and each
has a 2-bit field to define it. Two basic kinds of users are supported: Clients and
Managers. Clients use a domain; Managers control the behaviour of the domain. The
domains are defined in the Domain Access Control Register.
·
Figure 9-9: Domain
access control register formatillustrates how the 32 bits of the register are allocated
to define the sixteen 2-bit domains.
Figure 9-9: Domain access control register format
·
Table 9-5: Interpreting access bits in domain access control registerdefines how the
bits within each domain are interpreted to specify the access permissions.
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Value
Meaning
Notes
00
No Access
Any access will generate a Domain Fault.
01
Client
Accesses are checked against the access permission bits in
the Section or Page descriptor.
10
Reserved
Reserved. Currently behaves like the no access mode.
11
Manager
Accesses are notchecked against the access Permission bits
so a Permission fault cannot be generated.
Table 9-5: Interpreting access bits in domain access control register
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