Register Quick Reference Guide
MPC885 PowerQUICC Family Reference Manual, Rev. 2
C-2
Freescale Semiconductor
C.2
Supervisor Registers
All supervisor-level registers implemented on the MPC885 are SPRs, except for the machine state register
(MSR), described in
Table C-3
.
Table C-4
lists supervisor-level SPRs defined by the PowerPC architecture.
C.3
MPC885-Specific SPRs
Table C-2
and
Table C-5
list SPRs specific to the MPC885. Debug registers, which have additional
protection, are described in
Chapter 53, “System Development and Debugging.”
Supervisor-level registers
are described in
Table C-5
.
Table C-3. Supervisor-Level Registers
Description
Name
Comments
Serialize Access
Machine state register
MSR
See
Section 4.1.2.3.1, “Machine State Register (MSR).”
Write fetch sync
Table C-4. Supervisor-Level SPRs
SPR Number
Name
Comments
Serialize Access
Decimal
SPR[5–9]
SPR[0–4]
18
00000
10010
DSISR
See the
Programming Environments
Manual and
Section 4.1.2.1, “DAR,
DSISR, and BAR Operation.”
Write: Full sync
Read: Sync relative to
load/store operations
19
00000
10011
DAR
See the
Programming Environments
Manual and
Section 4.1.2.1, “DAR,
DSISR, and BAR Operation.”
Write: Full sync
Read: Sync relative to load/
store operations
22
00000
10110
DEC
See
Section 10.8.1, “Decrementer
Register (DEC),”
and
Chapter 14,
“Clocks and Power Control.”
Write
26
00000
11010
SRR0
See SRR0 settings for individual
exceptions in
Chapter 6, “Exceptions.”
Write
27
00000
11011
SRR1
See SRR1 settings for individual
exceptions in
Chapter 6, “Exceptions.”
Write
272
01000
10000
SPRG0
See the
Programming Environments
Manual.
Write
273
01000
10001
SPRG1
274
01000
10010
SPRG2
275
01000
10011
SPRG3
284
01000
11100
TBL write
1
1
Any read (
mftb
) to this address causes an implementation-dependent software emulation exception.
See
Section 10.9, “Timebase,”
and
Chapter 14, “Clocks and Power
Control.”
Write (as a store)
285
01000
11101
TBU write
1
287
01000
11111
PVR
Section 4.1.2.3.2, “Processor Version
Register.”
No (read-only register)
Summary of Contents for PowerQUICC MPC870
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