Fujitsu MB86R01 Installation and operating instructions

Fujitsu Microelectronics Europe
Application Note
an-mb86r01-trace-rev0-01.doc
TRACE
MB86R01 'JADE' & GREENHILLS TOOLCHAIN
APPLICATION NOTE
VERSION 0.01 16.9.2008

Revision History
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Revision History
Date Issue
09/15/2008 0.1 tk
First draft

Warranty and Disclaimer
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Warranty and Disclaimer
To the maximum extent permitted by applicable law, Fujitsu Microelectronics Europe GmbH restricts
its warranties and its liability for all products delivered free of charge (eg. software include or
header files, application examples, target boards, evaluation boards, engineering samples of IC’s
etc.), its performance and any consequential damages, on the use of the Product in accordance with
(i) the terms of the License Agreement and the Sale and Purchase Agreement under which
agreements the Product has been delivered, (ii) the technical descriptions and (iii) all accompanying
written materials. In addition, to the maximum extent permitted by applicable law, Fujitsu
Microelectronics Europe GmbH disclaims all warranties and liabilities for the performance of the
Product and any consequential damages in cases of unauthorised decompiling and/or reverse
engineering and/or disassembling. Note, all these products are intended and must only be used
in an evaluation laboratory environment.
1. Fujitsu Microelectronics Europe GmbH warrants that the Product will perform substantially in
accordance with the accompanying written materials for a period of 90 days form the date of
receipt by the customer. Concerning the hardware components of the Product, Fujitsu
Microelectronics Europe GmbH warrants that the Product will be free from defects in material
and workmanship under use and service as specified in the accompanying written materials
for a duration of 1 year from the date of receipt by the customer.
2. Should a Product turn out to be defect, Fujitsu Microelectronics Europe GmbH´s entire liability
and the customer´s exclusive remedy shall be, at Fujitsu Microelectronics Europe GmbH´s
sole discretion, either return of the purchase price and the license fee, or replacement of the
Product or parts thereof, if the Product is returned to Fujitsu Microelectronics Europe GmbH in
original packing and without further defects resulting from the customer´s use or the transport.
However, this warranty is excluded if the defect has resulted from an accident not attributable
to Fujitsu Microelectronics Europe GmbH, or abuse or misapplication attributable to the
customer or any other third party not relating to Fujitsu Microelectronics Europe GmbH.
3. To the maximum extent permitted by applicable law Fujitsu Microelectronics Europe GmbH
disclaims all other warranties, whether expressed or implied, in particular, but not limited to,
warranties of merchantability and fitness for a particular purpose for which the Product is not
designated.
4. To the maximum extent permitted by applicable law, Fujitsu Microelectronics Europe GmbH´s
and its suppliers´ liability is restricted to intention and gross negligence.
NO LIABILITY FOR CONSEQUENTIAL DAMAGES
To the maximum extent permitted by applicable law, in no event shall Fujitsu
Microelectronics Europe GmbH and its suppliers be liable for any damages whatsoever
(including but without limitation, consequential and/or indirect damages for personal
injury, assets of substantial value, loss of profits, interruption of business operation,
loss of information, or any other monetary or pecuniary loss) arising from the use of
the Product.
Should one of the above stipulations be or become invalid and/or unenforceable, the remaining
stipulations shall stay in full effect

Contents
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Contents
REVISION HISTORY ............................................................................................................ 2
WARRANTY AND DISCLAIMER ......................................................................................... 3
CONTENTS .......................................................................................................................... 4
1 TRACE OVERVIEW......................................................................................................... 5
1.1 Trace cell information .............................................................................................. 5
1.2 Further information .................................................................................................. 5
2 MB86R01 EVALUATION BOARD TO GHS ADAPTER................................................... 6
3 TRACE CONNECTION .................................................................................................... 7
4 TRACE STARTUP PROCEDURE.................................................................................... 8
5 TRACE CONFIGURATION .............................................................................................. 9
6 TRACE MEASUREMENT .............................................................................................. 11
6.1 System configuration............................................................................................. 11
6.2 Test program......................................................................................................... 11
6.3 Measurement ........................................................................................................ 12
6.4 Interpretation ......................................................................................................... 12
7 APPENDIX..................................................................................................................... 13
7.1 Figures .................................................................................................................. 13

Chapter 1 Trace Overview
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1 Trace Overview
The MB86R01 has an integrated ETM9CS Single Macrocell for real-time tracing. With the
ETM you can capture instructions and data executed by ARM926EJ-S core without
influencing the execution. The trace data helps to find bugs more easily and allows stepping
(both forwards and backwards) in the code.
1.1 Trace cell information
ETM name
CoreSight ETM9
Architecture version
ETMv3.2
Data width 4 Bit
FIFO size 60 bytes
1.2 Further information
Further information can be found on the ARM website
http://www.arm.com/documentation/Trace_Debug/index.html
The following documents are about the ETM cell:
CoreSight ETM9 r0p0 Technical Reference Manual (DDI0315A)
ETM9 Revision r2p2 Technical Reference Manual (DDI0157F)
Embedded Trace Macrocell Architecture Specification (IHI0014N)
CoreSight System Design Guide (DGI0012A)
CoreSight ETM9 Benchmarking (PR127-PRDC-006870 2.1, not publically available,
requires an NDA with ARM)

Chapter 2 MB86R01 Evaluation Board to GHS adapter
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2 MB86R01 Evaluation Board to GHS adapter
The Jade Evaluation Board is populated with a 20 pin JTAG and a separate 10 pin Trace
connector. However, the GreenHills Super Trace Probe (STP) has a special connector.
Therefore an adapter is needed to connect both devices. The adapter board can be ordered
from Fujitsu. Furthermore, the schematic and layout are available on request.
Figure 1 Adapter Board

Chapter 3 Trace Connection
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3 Trace Connection
The following figure shows the connection between the Jade Evaluation Board, the adapter
board and the GHS Super Trace probe. Pin 1 is marked on both boards. The GHS connector
is protected against reverse polarity.
Figure 2 STP to GHS connection

Chapter 4 Trace startup procedure
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4 Trace startup procedure
The following steps are necessary to configure and enable the trace functionality:
1. Power up Super Trace Probe (STP)
2. Power up the Jade Evaluation Board
3. Configure STP (must only be done when you start the STP for the first time)
set etm_version 3
Note: clock <= 6 Mhz
4. Start the Multi Debugger
5. Connect to the target
Note: The ETM clock is now running and the tracing LED is on
6. Reset the target
7. Download the program to the target

Chapter 5 Trace configuration
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5 Trace configuration
The trace data bit width directly effects the trace performance. Because of the limited
number of (four) data bits, the required trace data ´volume can overflow. As a result, the user
will lose some trace data. The user can avoid a FIFO overflow by disabling either the
instruction or the data trace. This can be done in the GHS application.
The trace cell can be configured within the GHS Debugger. Select TimeMachine-
>TraceOptions from the top menu. Then select Target Specific Options to open the Trace
options menu.
A detailled parameter description can be found in the GHS Debugging book in chapter 19
“Collecting and Using Trace data”. Here is a small summary:

Chapter 5 Trace configuration
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Cycle Accurate
Enables ETM cycle accurate mode. The ETM normally
outputs one trace packet every cycle when trace is enabled.
Often many of these packets contain no useful information
and can be discarded by the trace collection device. When
this option is enabled, no packets will be discarded. This
allows the trace tools to determine the number of cycles
spent executing each instruction, but requires extra space
in the trace buffer.
Use Timestamps
Enables timestamps. When timestamps are enabled,
the trace collection device records a timestamp with
each packet. Timestamps are displayed in the Trace List
and are used by the Profile window, PathAnalyzer, and
EventAnalyzer.
Prevent Overflow by Suppressing Data Trace
Enables the ETM FIFOFull mechanism. The amount of
data output by the ETM varies depending on the code being
executed and the trace configuration. Code with a large
number of indirect branches and data accesses (if data
trace is enabled) may generate so much data that the ETM
FIFO overflows. Trace data is lost when this happens. If
this option is enabled, the ETM attempts to prevent FIFO
overflows by using the selected method:
• Suppressing Data Trace — Suppresses data trace
when the FIFO is close to overflowing. This method
is only available with ETMv3.x targets. Suppressing
data trace is less effective at preventing the FIFO from
overflowing than stalling the CPU, but has no impact.