Arm Community
Site
Search
User
Site
Search
User
Groups
Arm Research
DesignStart
Education Hub
Graphics and Gaming
High Performance Computing
Innovation
Multimedia
Open Source Software and Platforms
Physical
Processors
Security
System
Software Tools
TrustZone for Armv8-M
中文社区
Blog
Announcements
Artificial Intelligence
Automotive
Healthcare
HPC
Infrastructure
Innovation
Internet of Things
Machine Learning
Mobile
Smart Homes
Wearables
Forums
All developer forums
IP Product forums
Tool & Software forums
Pelion IoT Platform
Support
Open a support case
Documentation
Downloads
Training
Arm Approved program
Arm Design Reviews
Community Help
More
Cancel
Developer Community
Tools and Software
Software Tools
Jump...
Cancel
Software Tools
Arm Development Studio forum
ARM cache in simulator
Tools, Software and IDEs blog
Forums
Videos & Files
Help
Jump...
Cancel
New
Replies
2 replies
Subscribers
127 subscribers
Views
1471 views
Users
0 members are here
Related
ARM cache in simulator
Offline
ManishKesarkar ManishKesarkar
over 7 years ago
Note: This was originally posted on 27th July 2009 at http://forums.arm.com
Hi
I am using RVDS 4.0 Real view Instruction set simulator for ARM926EJS target. While configuring the target using ARMulator dialog box I get option MMU/MPU initialization when I select this option I get 60 % reduction in total cycles for my code. When this option is not selected the code for cache enabling is included it has no effect and I 60% increase in cycles is observed. So does this option enables cache does and uses default MMU/MPU tables for cache?
The core configuration I am using is as follows
ARM926EJ-S, 16Kb I-cache, 16Kb D-cache, 64Kb I-Ram, 64KB D-Ram,
Memory Management Unit, I-uTLB, D-uTLB, TLB, BIU, Little endian,
Debug Comms Channel, 4GB, Pagetables, Mapfile, Timer, Profiler,
SIMRDI MemCallback, Tube, Millisecond [6666.67 cycles_per_millisecond], IntCtrl,
Also in above waht does figure [6666.67 cycles_per_millisecond] indicates?
Parents
Offline
Martin Weidmann
over 7 years ago
Note: This was originally posted on 27th July 2009 at
http://forums.arm.com
In the second scenario are you just enabling the caches, or also configurring the MMU? On the 926 all data accesses are treated as non-cacheable while the MMU is disabled.
Are you using RVDS? If so, you should have a 926 MMU/cache initialization example included.
Cancel
Up
0
Down
Reply
Cancel
Reply
Offline
Martin Weidmann
over 7 years ago
Note: This was originally posted on 27th July 2009 at
http://forums.arm.com
In the second scenario are you just enabling the caches, or also configurring the MMU? On the 926 all data accesses are treated as non-cacheable while the MMU is disabled.
Are you using RVDS? If so, you should have a 926 MMU/cache initialization example included.
Cancel
Up
0
Down
Reply
Cancel
Children
No data
More questions in this forum
By title
By date
By reply count
By view count
By most asked
By votes
By quality
Descending
Ascending
All recent questions
Unread questions
Questions you've participated in
Questions you've asked
Unanswered questions
Answered questions
Questions with suggested answers
Questions with no replies
Not Answered
Where can I download DS-5 hardware firmware??
0
2851
views
1
reply
Latest
1 month ago
by
Ronan Synnott
Not Answered
Getting errors after including arm_math.h
0
stm32 h7
Keil
Digital Signal Processor (DSP)
STM32
21769
views
9
replies
Latest
1 month ago
by
roger-liu
Not Answered
freeRTOS demo DS-5 ERROR(CMD360) when trying to debug
+1
6929
views
12
replies
Latest
2 months ago
by
tolc
Answered
ubuntu - How to uninstall Arm Development studio and all its requirements
0
Arm Development Studio
3815
views
1
reply
Latest
2 months ago
by
Jonathan Simmonds
Answered
DSTREAM Probe damage - Spare parts?
0
DSTREAM
6006
views
2
replies
Latest
2 months ago
by
SamGKN
<
>
View all questions in Arm Development Studio forum