Motorola MVME2400 Series Manuel de service Page 91
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5-1
5
5PPCBug
PPCBug Overview
The PPCBug firmware is the layer of software just above the hardware.
The firmware provides the proper initialization for the devices on the
MVME240x module upon power-up or reset.
This chapter describes the basics of PPCBug and its architecture, describes
the monitor (interactive command portion of the firmware) in detail, and
gives information on actually using the PPCBug debugger and the special
commands. A complete list of PPCBug commands appears at the end of
the chapter.
Chapter 6 contains information about the CNFG and ENV commands,
system calls, and other advanced user topics.
For full user information about PPCbug, refer to the PPCBug Firmware
Package User’s Manual and the PPCBug Diagnostics Manual, listed in
the Related Documentation appendix.
PPCBug Basics
The PowerPC debug firmware, PPCBug, is a powerful evaluation and
debugging tool for systems built around the Motorola PowerPC
microcomputers. Facilities are available for loading and executing user
programs under complete operator control for system evaluation.
PPCBug provides a high degree of functionality, user friendliness,
portability, and ease of maintenance.
It achieves good portability and comprehensibility because it was written
entirely in the C programming language, except where necessary to use
assembler functions.
PPCBug includes commands for:
❏ Display and modification of memory
- MVME2400-Series 1
- Single Board Computer 1
- Installation and Use 1
- Restricted Rights Legend 2
- Document Terminology 4
- Safety Summary 5
- Safety Depends On You 5
- Contents 9
- Glossary 12
- List of Figures 13
- List of Tables 15
- 1Preparing and Installing the 17
- MVME2400-Series Module 17
- MVME240x Module 18
- PMCspan Expansion Mezzanine 19
- PCI Mezzanine Cards (PMCs) 19
- VMEsystem Enclosure 20
- System Console Terminal 20
- 1 2 3 4 5 6 7 8 25
- ESD Precautions 29
- 2064 9708 31
- Primary PMCspan 32
- 2081 9708 33
- Secondary PMCspan 34
- 2065 9708 35
- INTERRUPT ACKNOWLEDGE 38
- DEBUG port on 38
- Installation Considerations 39
- 2Operating Instructions 41
- Switches 42
- MVME240x 43
- Status Indicators 44
- 10/100 BASET Port 44
- DEBUG Port 45
- Operating Instructions 46
- PMC Slots 47
- 3Functional Description 49
- (RST) and Abort (ABT) 50
- General Description 52
- Block Diagram 52
- (PHB) ASIC 55
- PCI Bus Latency 56
- 3:1 clock ratio: 56
- PPC Bus Latency 58
- Assumptions 60
- SDRAM Memory 62
- Functional Description 66
- Flash Memory 67
- Ethernet Interface 70
- VMEbus Interface 73
- Asynchronous Debug Port 73
- PCI Host Bridge (PHB) 75
- Interrupt Controller (MPIC) 76
- Programmable Timers 76
- 4Programming the MVME240x 79
- Processor Bus Memory Map 80
- PCI Local Bus Memory Map 81
- VMEbus Memory Map 81
- Programming Considerations 82
- Interrupt Handling 84
- DMA Channels 86
- Sources of Reset 86
- Endian Issues 88
- Programming the MVME240x 90
- PPCBug Overview 91
- PPCBug Basics 91
- Diag> 92
- Memory Requirements 93
- PPCBug Implementation 93
- Debugger Commands 96
- Table 5-1. Debugger Commands 97
- Diagnostic Tests 100
- Using PPCBug 101
- 6Modifying the Environment 103
- Modifying the Environment 104
- ENV - Set Environment 105
- ∗ signal after 107
- ∗ signal during board 107
- 00001000? 111
- (Default) 112
- Ordering Related 119
- Documentation 119
- Manufacturers’ Documents 120
- Document Title and Source 121
- Publication 121
- Related Specifications 123
- Specifications 127
- Table B-1. MVME240 128
- Specifications (Continued) 128
- Cooling Requirements 129
- EMC Regulatory Compliance 130
- CConnector Pin Assignments 131
- VMEbus Connector - P1 132
- Connector Pin Assignments 133
- VMEbus Connector - P2 134
- Pin Assignments 136
- CPU Debug Connector - J1 137
- PCI Expansion Connector - J6 142
- DTroubleshooting the MVME240x 151
- Solving Startup Problems 152
- Troubleshooting the MVME240x 153
- Numerics 169
- Single Board Computer 177
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