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IXP400 Software
Contents
April 2005 IXP400 Software Version 2.0 Programmer’s Guide
10 Document Number: 252539, Revision: 007
17.9 Threading..........................................................................................................................252
17.10 Using the API....................................................................................................................252
17.10.1 API Usage for Intel XScale
®
Core PMU ..............................................................253
17.10.1.1 Event and Clock Counting ...................................................................253
17.10.1.2 Time-Based Sampling..........................................................................255
17.10.1.3 Event-Based Sampling ........................................................................257
17.10.1.4 Using Intel XScale
®
Core PMU to Determine Cache Efficiency ..........260
17.10.2 Internal Bus PMU.................................................................................................261
17.10.2.1 Using the Internal Bus PMU Utility to Monitor
Read/Write Activity on the North Bus...................................................262
17.10.3 Xcycle (Idlecycle Counter)...................................................................................263
18 Access-Layer Components:
Queue Manager (IxQMgr) API...................................................................................................265
18.1 What’s New.......................................................................................................................265
18.2 Overview...........................................................................................................................265
18.3 Features and Hardware Interface.....................................................................................266
18.4 IxQMgr Initialization and Uninitialization...........................................................................267
18.5 Queue Configuration.........................................................................................................267
18.6 Queue Identifiers ..............................................................................................................267
18.7 Configuration Values ........................................................................................................268
18.8 Dispatcher.........................................................................................................................268
18.9 Dispatcher Modes.............................................................................................................269
18.10 Livelock Prevention...........................................................................................................272
18.11 Threading..........................................................................................................................274
18.12 Dependencies...................................................................................................................274
19 Access-Layer Components:
Synchronous Serial Port (IxSspAcc) API................................................................................275
19.1 What’s New.......................................................................................................................275
19.2 Introduction.......................................................................................................................275
19.3 IxSspAcc API Details........................................................................................................275
19.3.1 Features...............................................................................................................275
19.3.2 Dependencies......................................................................................................276
19.4 IxSspAcc API Usage Models............................................................................................277
19.4.1 Initialization and General Data Model..................................................................277
19.4.2 Interrupt Mode .....................................................................................................277
19.4.3 Polling Mode........................................................................................................ 280
20 Access-Layer Components:
Time Sync (IxTimeSyncAcc) API..............................................................................................283
20.1 What’s New.......................................................................................................................283
20.2 Introduction.......................................................................................................................283
20.2.1 IEEE 1588 PTP Protocol Overview .....................................................................284
20.2.2 IEEE 1588 Hardware Assist Block.......................................................................285
20.2.3 IxTimeSyncAcc....................................................................................................288
20.2.4 IEEE 1588 PTP Client Application.......................................................................288
20.3 IxTimeSyncAcc API Details ..............................................................................................288
20.3.1 Features...............................................................................................................288
20.3.2 Dependencies......................................................................................................289
20.3.3 Error Handling......................................................................................................289