Table of Contents
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11/2/95
TABLE OF CONTENTS (Continued)
Paragraph
Number
5.4.2.3
Changing Privilege Level........................................................................ 5-39
5.5
Exception Processing ...................................................................................... 5-39
5.5.1
Exception Vectors......................................................................................... 5-40
5.5.1.1
Types of Exceptions ................................................................................. 5-41
5.5.1.2
Exception Processing Sequence .......................................................... 5-41
5.5.1.3
Exception Stack Frame............................................................................ 5-42
5.5.1.4
Multiple Exceptions .................................................................................. 5-42
5.5.2
Processing of Specific Exceptions ............................................................ 5-44
5.5.2.1
Reset ........................................................................................................... 5-44
5.5.2.2
Bus Error..................................................................................................... 5-46
5.5.2.3
Address Error............................................................................................. 5-46
5.5.2.4
Instruction Traps........................................................................................ 5-47
5.5.2.5
Software Breakpoints............................................................................... 5-47
5.5.2.6
Hardware Breakpoints............................................................................. 5-48
5.5.2.7
Format Error............................................................................................... 5-48
5.5.2.8
Illegal or Unimplemented Instructions .................................................. 5-48
5.5.2.9
Privilege Violations................................................................................... 5-49
5.5.2.10
Tracing........................................................................................................ 5-50
5.5.2.11
Interrupts..................................................................................................... 5-51
5.5.2.12
Return from Exception.............................................................................. 5-52
5.5.3
Fault Recovery............................................................................................... 5-53
5.5.3.1
Types of Faults .......................................................................................... 5-55
5.5.3.1.1
Type I-Released Write Faults........................................................... 5-55
5.5.3.1.2
Type II-Prefetch, Operand, RMW, and MOVEP Faults................. 5-56
5.5.3.1.3
Type III-Faults During MOVEM Operand Transfer ....................... 5-57
5.5.3.1.4
Type IV-Faults During Exception Processing ............................... 5-57
5.5.3.2
Correcting a Fault ..................................................................................... 5-57
5.5.3.2.1
Type I-Completing Released Writes via Software ....................... 5-57
5.5.3.2.2
Type I-Completing Released Writes via RTE................................ 5-57
5.5.3.2.3
Type II-Correcting Faults via RTE.................................................... 5-58
5.5.3.2.4
Type III-Correcting Faults via Software.......................................... 5-58
5.5.3.2.5
Type III-Correcting Faults by Conversion and Restart................. 5-58
5.5.3.2.6
Type III-Correcting Faults via RTE................................................... 5-59
5.5.3.2.7
Type IV-Correcting Faults via Software ......................................... 5-59
5.5.4
CPU32 Stack Frames .................................................................................. 5-60
5.5.4.1
Four-Word Stack Frame .......................................................................... 5-60
5.5.4.2
Six-Word Stack Frame............................................................................. 5-60
5.5.4.3
Bus Error Stack Frame............................................................................. 5-60
5.6
Development Support...................................................................................... 5-63
5.6.1
CPU32 Integrated Development Support................................................ 5-63
5.6.1.1
Background Debug Mode (BDM) Overview ........................................ 5-64
5.6.1.2
Deterministic Opcode Tracking Overview............................................ 5-64
MOTOROLA
Freescale Semiconductor, Inc.
SECTION 1: OVERVIEW
Title
MC68340 USER'S MANUAL
For More Information On This Product,
Go to: www.freescale.com
UM Rev 1
P a g e
Number
ix
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