L-Bus to U-Bus Interface (L2U)
MPC561/MPC563 Reference Manual, Rev. 1.2
11-16
Freescale Semiconductor
11.8.6
Global Region Attribute Register (L2U_GRA)
The L2U global region attribute register (L2U_GRA) defines the protection attributes associated with the
memory region which is not protected under the four DMPU regions. This register also provides
enable/disable control for the four DMPU regions.
20:21
PP
Protection bits
00 No supervisor access, no user access
01 Supervisor read/write access, no user access
10 Supervisor read/write access, user read-only access
11 Supervisor read/write access, user read/write access
22:24
—
Reserved
25
G
Guarded attribute
0 Not guarded from speculative accesses
1 Guarded from speculative accesses
26:31
—
Reserved
MSB
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Field ENR0 ENR1 ENR2 ENR3
—
Reset
0000_0000_0000_0000
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
LSB
31
Field
—
PP
—
G
—
Reset
0000_0000_0000_0000
Addr
SPR 536
Figure 11-7. L2U Global Region Attribute Register (L2U_GRA)
Table 11-10. L2U_GRA Bit Descriptions
Bits
Name
Description
0
ENR0
Enable attribute for region 0
0 Region attribute is off
1 Region attribute is on
1
ENR1
Enable attribute for region 1
0 Region attribute is off
1 Region attribute is on
2
ENR2
Enable attribute for region 2
0 Region attribute is off
1 Region attribute is on
Table 11-9. L2U_RAx Bit Descriptions (continued)
Bits
Name
Description
Summary of Contents for MPC561
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