Burst Buffer Controller 2 Module
MPC561/MPC563 Reference Manual, Rev. 1.2
4-22
Freescale Semiconductor
NOTE
When the MPC562/MPC564 operates in decompression on mode, a
minimum of four unused words MUST be left after the last instruction in
any region.
4.6.2.3
Region Attribute Registers (MI_RA[0:3])
The following registers define protection attributes and size for four memory regions.
,
MSB
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Field
RS
HRESET
Unchanged
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
LSB
31
Field
RS
PP
—
G
CMPR
BTBINH
—
HRESET
Undefined
000
Undefined
000
Addr
SPR 816 (MI_RA0), SPR 817 (MI_RA1), SPR 818 (MI_RA2), 819 (MI_RA3)
Figure 4-9. Region Attribute Register (MI_RA0[0:3])
Table 4-6. MI_RA[0:3] Registers Bit Descriptions
Bits
Name
Description
0:19
RS
Region size. For byte size by region, see
.
20:21
PP
1
1
G and PP attributes perform similar protection activities on a region. The more protective attribute will be implied on the
region if the attributes programming oppose each other.
Protection bits:
00 Supervisor — No Access, User — No Access.
01 Supervisor — Fetch, User — No Access.
1x Supervisor — Fetch, User — Fetch.
22:24
—
Reserved
25
G
1
Guard attribute for region
0 Speculative fetch is not prohibited from region. Region is not guarded.
1 Speculative fetch is prohibited from guarded region. An exception will occur under such attempt.
26:27
CMPR
2
2
This field is available only on the MPC562/MPC564.
Compressed Region.
x0 The region in not restricted
01 Region is considered a non-compressed code region. Access to the region is allowed only in
“Decompression Off” mode
11 Region is considered a compressed code region. Access to the region is allowed only in
“Decompression On” mode
28
BTBINH
BTB Inhibit region
0 BTB operation is not prohibited for current memory region
1 BTB operation is prohibited for current memory region.
29:31
—
Reserved
Summary of Contents for MPC561
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