Step 15: Look At The Translation Table Details For A Single Logical Address - HP MC68040 User Manual

Chapter 1: Getting Started

Step 15: Look at the translation table details for a single logical address

Step 15: Look at the translation table details for a
single logical address
• Choose Display→MMU Translations ... In the Display MMU Translations dialog
box, select MMU Tables, Address 18000h, and Table Level All. Then click OK.
• Or, using the command line, enter the following command:
display mmu_translations tables 18000h level all
The following display should appear. It shows how logical address 18000h is
translated through the MMU tables to its corresponding physical address ffff8000h.
When you are developing a virtual memory system, you will need to check the
translations of selected addresses. The MMU tables option of the Display→MMU
Translations ... command lets you do this.
• Try displaying the translation for a non-resident page, such as address 54321h.
Also, try using the memory command to access a non-resident page. The monitor
always recovers from its own exceptions generated during commands, and displays
a detailed error message.
32
Logical Address (hex)
Logical Address (bin)
Table Level
LEVEL INDEX LOCATION
SRP
A 000 00000200
B 000 00000400
C 024 00000660
Physical Address (hex) = ffff8000
0 0 0 1
0000 0000 0000 0001 1000 0000 0000 0000
AAAA AAAB BBBB BBCC CCCC PPPP PPPP PPPP
CONTENTS TBL/PAGE G Ux S CM M U W UDT/PDT
00000200 00000200
0000040b 00000400
0000060b 00000600
ffff801b ffff8000 n 00 n cw y y n RESIDENT
8 0 0 0
RESIDENT
y n RESIDENT
y n RESIDENT