Open Core Protocol Debug Interface Specification rev 1.0 - OCP-IP

OCP-IP Confidential
Table of Contents
Table of Contents.................................................................................................................................3
1. OCP Debug specification overview ........................................................................................................5
1.1 OCP statement of need for debug standardization ..................................................................................5
1.1.1 Other ongoing Debug activities.......................................................................................................6
1.2 OCP Debug strategy................................................................................................................................7
1.3 Common guidelines and infrastructure ...................................................................................................7
1.4 Scalability and configurability of debug resources .................................................................................7
1.5 Comprehensive set of debug features......................................................................................................8
1.6 OCP debug Business Model....................................................................................................................8
2. Technical approach .................................................................................................................................9
2.1 Three Views of Debugging .....................................................................................................................9
2.2 Technical scope of OCP Debug Interface .............................................................................................11
3. Debug Components and IP Interfaces...................................................................................................11
3.1 Debug interface definitions...................................................................................................................12
3.2 Basic Socket Level Debug interfaces....................................................................................................12
3.3 Core Debug Socket Interfaces...............................................................................................................13
3.4 Cross Triggering Socket Interfaces.......................................................................................................15
3.4.1 OCP Cross Triggering – General Requirements ...........................................................................16
3.4.2 OCP Cross Triggering – General Configurations .........................................................................17
3.4.3 Fundamental Trigger Limitations..................................................................................................17
3.4.4 Cycle-exact Trigger and Feedback................................................................................................18
3.4.5 Cycle-exact Trigger with Relaxed Feedback ................................................................................18
3.4.6 Exact triggering in a star configuration.........................................................................................19
3.5 OCP Synchronized Run Control ...........................................................................................................19
3.6 OCP Trace Interfaces ............................................................................................................................19
4. Extended (Optional) Debug interfaces..................................................................................................20
4.1 Performance Monitoring .......................................................................................................................21
4.2 System Time-stamping .........................................................................................................................22
4.2.1 Synchronous start of local time stamp counters............................................................................22
4.3 Power Management Monitoring ...........................................................................................................23
4.4 Security Debug Interface ......................................................................................................................24
5. Single Stepping and Virtual Single Stepping with Multi-core Chips....................................................24
6. EDA and SW Tools Support.................................................................................................................25
6.1 ESL Design and Design Checkers Support...........................................................................................25
6.2 Programmers Model..............................................................................................................................25
Appendix Implementation Examples ................................................................................27
A. MCDS Example of OCP Debug Interface Implementation and Protocol .............................................27
A.1 Trace Ports and Protocol, Complete Example with MCDS ..................................................................27
A.2 The 12 MCDS Trace Ports and corresponding OCP Debug Socket Signal s.........................................32
A.3 Debug Transactor – RUN Control Bus Master ......................................................................................36
A.4 OCDS/MCDS Complete Example of Run Control: On-Chip Debug Support.......................................37
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