Solving Problems
Your program and emulator may be running fine until you turn on the MMU. Then
program execution may fail. You may not be able to use features of your emulator.
How can this happen? It can happen if the MMU mapping tables are incorrect.
When the MMU turns on and starts managing memory by performing tablewalks in
tables that are invalid, pages of logical memory may overwrite your stack space,
your emulation monitor, or any other address space, making your entire system
unusable. If this happens, note where the program is executing. The stack may be
inaccessible. The monitor (with its emulation feature set) may be inaccessible. The
vector table may be placed in guarded memory. Program data space may become
inaccessible.
Using the "display mmu_translations" command
to overcome plug-in problems
Plug-in problems involving the MMU are often caused by incorrect mappings in
your translation tables. If your logical address is translated to an incorrect physical
address, the Display
→
MMU Translations or display mmu_translations
command can show the details of how your logical addresses are mapped to the
wrong physical addresses.
To display the MMU translations when the TC register contains a disable value,
include the enable value (8000h) in the Override Processor Register Values section
of the Display MMU Translations dialog box, or include use_value TC 08000h in
your command line entry.
You can also enter the Display
→
MMU Translations... or display
mmu_translations command to test your mappings before you enable the MMU.
This command by itself reads all present translations in your MMU tables. No
invalid or illegal paths are shown in the listing. You can read through the display
on screen to see if all of your address ranges are represented, and if they are
mapped to appropriate space in physical memory.
When you enter the Display
→
MMU Translations or display mmu_translations
command, the emulator reads the MMU registers (TC, URP, and SRP) and MMU
tables. If you do not have correct values in the TC, URP, and SRP registers, the
Chapter 10: Using Memory Management
Solving Problems
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Страница 1: ...User s Guide for the Graphical User Interface MC68040 EC040 LC040 Emulator Analyzer HP 64783A B ...
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Страница 31: ...Part 1 Quick Start Guide 1 ...
Страница 33: ...1 Getting Started 3 ...
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Страница 71: ...2 Solving Quick Start Problems Solutions to problems you might face during the Getting Started procedures 41 ...
Страница 75: ...Part 2 Using The Emulator 45 ...
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Страница 141: ...4 Using the Emulator How to control the processor and view system resources 111 ...
Страница 227: ...5 Using the Emulation Bus Analyzer How to record program execution in real time 197 ...
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Страница 311: ...7 Making Software Performance Measurements How to make software performance measurements on your programs 281 ...
Страница 331: ...8 Configuring the Emulator 301 ...
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Страница 383: ...9 Solving Problems What to do when the emulator doesn t behave as expected 353 ...
Страница 397: ...Part 3 Reference 367 ...
Страница 399: ...10 Using Memory Management Understanding logical and physical emulation and analysis 369 ...
Страница 429: ...11 Emulator Commands The command syntax reference for the emulator softkey interface 399 ...
Страница 443: ...copy Chapter 11 Emulator Commands copy 413 ...
Страница 451: ...display Chapter 11 Emulator Commands display 421 ...
Страница 457: ...DISPLAY MEMORY Chapter 11 Emulator Commands DISPLAY MEMORY 427 ...
Страница 461: ...DISPLAY MMU Chapter 11 Emulator Commands DISPLAY MMU 431 ...
Страница 464: ...DISPLAY TRACE Chapter 11 Emulator Commands DISPLAY TRACE 434 ...
Страница 470: ...Examples end end locked end release_system See Also emul700 emulator_name help end Chapter 11 Emulator Commands end 440 ...
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Страница 514: ... SYMB Chapter 11 Emulator Commands SYMB 484 ...
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Страница 583: ...13 Setting X Resources 553 ...
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Страница 607: ...15 Microtec Language Tools Used With MC68040 Emulators Using the emulator analyzer with Microtec language tools 577 ...
Страница 613: ...16 Specifications and Characteristics 583 ...
Страница 627: ...Part 4 Concept Guide 597 ...
Страница 629: ...17 X Resources and the Graphical User Interface 599 ...
Страница 639: ...Part 5 Installation and Service Guide 609 ...
Страница 645: ...Chapter 18 Connecting the Emulator to a Target System Plugging The Emulator Into A Target System 615 ...
Страница 697: ...19 Installation and Service 667 ...
Страница 746: ...Chapter 19 Installation and Service Verifying the Installation 716 ...
Страница 755: ...20 Installing Updating Emulator Firmware 725 ...
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Страница 810: ...X server 554 604 X Window System 54 Index 780 ...