Apparatus and method for trace stream identification of a pipeline flattener primary code flush following initiation of an interrupt service routine
US7210072B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 2003 |
| Grant date | Apr 24, 2007 |
| Priority date | — |
| Expiry date | Apr 19, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/25
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
When a PROGRAM CODE FLUSH signal is generated in a target processor during a test procedure, a sync marker is generated in a program counter trace stream. The sync marker includes a plurality of packets, the packets identifying that the sync marker is has been generated as a result of the PROGRAM CODE FLUSH signal. The program code flush sync marker identifies the absolute program counter address at the time of the generation of the PROGRAM CODE FLUSH signal and relates the PROGRAM CODE FLUSH signal sync marker to a timing trace stream. The PROGRAM CODE FLUSH signal is generated at the transition between the program (primary) code instructions being removed from the pipeline flattener and the interrupt service routine (secondary) code instructions being removed from the pipeline flattener.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.