Table of Contents
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Paragraph
Number
3.4
3.4.1
3.4.1.1
3.4.1.2
3.4.1.3
3.4.1.4
3.4.1.5
3.4.1.6
3.4.2
3.4.2.1
3.4.2.2
3.4.2.3
3.4.2.4
3.4.2.5
3.4.2.6
3.5
3.5.1
3.5.2
3.5.3
3.5.4
3.5.5
3.5.5.1
3.6
3.6.1
3.6.2
3.6.3
3.6.4
3.6.5
3.7
3.8
4.1
4.2
4.3
4.3.1
4.3.2
4.3.3
4.3.4
Contents
CONTENTS
Title
Page
Number
Cache ControL ................................................................................................... 3-13
Cache Control Parameters in HIDO ................................................................ 3-13
Data Cache Flash Invalidation ................................................................... 3-13
Data Cache Enabling/Disabling ................................................................. 3-13
Data Cache Locking ................................................................................... 3-14
Instruction Cache Flash Invalidation ......................................................... 3-14
Instruction Cache Enabling/Disabling ....................................................... 3-14
Instruction Cache Locking ......................................................................... 3-15
Cache Control Instructions ............................................................................. 3-15
Data Cache Block Touch (debt) and
Data Cache Block Touch for Store (debtst) .......................................... 3-15
Data Cache Block Zero (debz) .................................................................. 3-16
Data Cache Block Store (debst) ................................................................ 3-16
(debt') .................................................................
3-17
Data Cache Block Invalidate (debi) ........................................................... 3-17
Instruction Cache Block Invalidate (icbi) .................................................. 3-17
Cache Operations ............................................................................................... 3-18
Cache Block Replacement/Castout Operations ............................................. 3-18
Cache Flush Operations ................................................................................. 3-21
Data Cache-Block-Fill Operations ................................................................. 3-21
Instruction Cache-Block-Fill Operations ....................................................... 3-21
Data Cache-Block-Push Operation ................................................................ 3-22
Enveloped High-Priority Cache-Block-Push Operation ............................ 3-22
Ll Caches and 60x Bus Transactions ................................................................ 3-22
Read Operations and the MEl Protocol ......................................................... 3-23
Bus Operations Caused by Cache Control Instructions ................................. 3-24
Snooping ........................................................................................................ 3-25
Snoop Response to 60x Bus Transactions ..................................................... 3-26
Transfer Attributes ......................................................................................... 3-28
Bus Interface ...................................................................................................... 3-30
MEl State Transactions ...................................................................................... 3-32
Chapter 4
Exceptions
MPC750 Microprocessor Exceptions ................................................................... 4-2
Exception Recognition and Priorities ................................................................... 4-4
Exception Processing ........................................................................................... 4-7
Enabling and Disabling Exceptions .............................................................. .4-1 0
Steps for Exception Processing ...................................................................... 4-10
Setting MSR[RI] ............................................................................................ 4-11
Returning from an Exception Handler .......................................................... .4-11
vii
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