Burst Buffer Controller 2 Module
MPC561/MPC563 Reference Manual, Rev. 1.2
Freescale Semiconductor
4-21
NOTE
When writing to the BBCMCR register, the following instruction after
mtspr BBCMCR, Rx should be ISYNC, to make sure that the programmed
value will come into effect before any further action.
4.6.2.2
Region Base Address Registers (MI_RBA[0:3])
The following registers contain 32 bits and define the starting address of the protected regions. There is
one register for each of four regions.
,
27:29
—
Reserved.
NOTE: Bit 27 was BCMEE and should be written as 0.
30
DCAE
Decompressor Configuration Access Enable. This bit enables DECRAM and DCCR
registers access from the U-bus master (i.e., RCPU, external master).
0 DECRAM and DCCR registers are locked.
1 DECRAM allows accesses from the U-bus only.
DCAE bit should be set before vocabulary tables are loaded via the U-bus.
31
TST
Reserved for BBC Test Operations.
1
BE and BTEE should not both be set at the same time, setting the BE bit disables the BTB.
2
This bit is available on the MPC562/MPC564 only, software should write "0" to this bit for MPC561/MPC563.
MSB
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Field
RA
HRESET
Unchanged
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
LSB
31
Field
RA
—
HRESET
Undefined
0000_0000_0000
Addr
SPR 784 (MI_RBA0), SPR 785 (MI_RBA1), SPR 786 (MI_RBA2), SPR 787 (MI_RBA3)
Figure 4-8. Region Base Address Register (MI_RBA[0:3])
Table 4-5. MI_RBA[0:3] Registers Bit Descriptions
Bits
Name
Description
0:19
RA
Region Base address. The RA field provides the base address of the region. The region base
address should start on the memory block boundary for the corresponding region size, specified
in the region attribute register MI_RA.
20:31
—
Reserved
Table 4-4. BBCMCR Field Descriptions (continued)
Bits
Name
Description
Summary of Contents for MPC561
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