mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 1197

• Manufacturer Part Number: mpc823rg
• Description: Mpc823 Powerquicc Integrated Communications Processor For Portable Systems
• Manufacturer: Freescale Semiconductor, Inc

MPC823 Instruction Set—dcbst
dcbst
Assembler Syntax
Definition
Operation
Description
FIELD
FIELD
BIT
BIT
16
0
17
1
18
B
2
Freescale Semiconductor, Inc.
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3
•
The function of this instruction is independent of the write-
through and caching-inhibited/allowed modes of the block
containing the byte addressed by EA. The processor treats this
instruction as a load from the addressed byte with respect to
address translation and memory protection. It may also be
treated as a load for referenced and changed bit recording
except that referenced and changed bit recording may not occur.
Other registers altered:
•
dcbst
Data Cache Block Store
EA is the sum (rA|0) + (rB).
The dcbst instruction executes as follows:
•
POWERPC ARCHITECTURE
If the block containing the byte addressed by EA is in
coherency-required mode, and a block containing the byte
addressed by EA is in the data cache of any processor and
has been modified, the writing of it to main memory is
initiated.
If the block containing the byte addressed by EA is in
coherency-not-required mode, and a block containing the
byte addressed by EA is in the data cache of this processor
and has been modified, the writing of it to main memory is
initiated.
None
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MPC823 REFERENCE MANUAL
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5
LEVEL
VEA
rA,rB
22
6
23
7
00000
24
8
25
9
SUPERVISOR
54
LEVEL
10
26
11
27
OPTIONAL
12
28
13
29
A
MOTOROLA
14
30
FORM
X
15
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0