TABLE OF CONTENTS (Continued)
Paragraph Page
Number Title Number
MOTOROLA
MPC823e REFERENCE MANUAL
vii
10.3.2 Implementation-Specific Operations ........................................10-4
10.3.3 Special Registers of the Data Cache .......................................10-4
10.3.3.1 Data Cache Control and Status Register ......................10-5
10.3.3.2 Data Cache Address Register ......................................10-7
10.3.3.3 Reading the Cache Structures ......................................10-7
10.4 Operating the Data Cache ................................................................10-10
10.4.1 Data Cache Read ...................................................................10-10
10.4.2 Data Cache Write ...................................................................10-10
10.4.2.1 Copyback Mode ..........................................................10-11
10.4.2.2 Writethrough Mode .....................................................10-12
10.4.3 Data Cache Inhibited Accesses .............................................10-12
10.4.4 Data Cache Freeze ................................................................10-12
10.4.5 Data Cache Coherency ..........................................................10-13
10.5 Data Cache Commands ....................................................................10-13
10.5.1 Flushing and Invalidating the Cache ......................................10-13
10.5.2 Enabling and Disabling the Cache .........................................10-13
10.5.3 Locking and Unlocking the Cache ..........................................10-13
10.5.4 Data Cache Instructions .........................................................10-14
10.5.4.1 dcbi, dcbst, dcbf And dcbz Instructions ......................10-14
10.5.4.2 Touch ..........................................................................10-14
10.5.4.3 Storage Synchronization/Reservation ........................10-14
10.5.5 Data Cache Read ...................................................................10-14
Section 11
Memory Management Unit
11.1 Features ..............................................................................................11-1
11.2 Address Translation ............................................................................11-2
11.2.1 Translation Lookaside Buffer Operation ...................................11-2
11.3 Protection ............................................................................................11-3
11.4 Storage Control ...................................................................................11-4
11.5 Translation Table Structure .................................................................11-5
11.5.1 Level One Descriptor ................................................................11-9
11.5.2 Level Two Descriptor ..............................................................11-10
11.6 Programming the Memory Management Unit ...................................11-15
11.6.1 Control Registers ....................................................................11-16
11.6.1.1 MMU Instruction Control Register ...............................11-16
11.6.1.2 MMU Data Control Register ........................................11-17
11.6.1.3 MMU Current Address Space ID Register ..................11-18
11.6.1.4 MMU Instruction Effective Page Number Register .....11-19
11.6.1.5 MMU Data Effective Page Number Register ..............11-20
11.6.1.6 MMU Instruction Real Page Number Register ............11-21
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