mirror of
https://gitlab.rtems.org/rtems/rtos/rtems.git
synced 2026-08-31 09:37:25 +08:00
Sebastian Huber
718124e4e5
A new option RTEMS_INTERRUPT_REPLACE is introduced that permits updating the first interrupt handler for the registered interrupt vector and matching argument. If no match is found, the install function fails with RTEMS_UNSATISFIED. The Interrupt Manager Extension offers interrupt handlers with an argument pointer. It is impossible to update two words (handler and argument) atomically on most architectures. In order to avoid an SMP lock in bsp_interrupt_handler_dispatch() which would degrade the interrupt response time an alternative must be provided that makes it possible to tear-down interrupt sources without an SMP lock. Add RTEMS_INTERRUPT_REPLACE option to Interrupt Manager Extension. This enables a clean tear-down of interrupt sources on SMP configurations. Instead of an interrupt handler removal a replacement handler can be installed to silence an interrupt source. This can be used in contexts that allow no sophisticated synchronization (e.g. in atexit() or fatal handlers).
This is the Real-Time Executive for Multiprocessing Systems (RTEMS). The version number for this software is indicated in the VERSION file. See the documentation manuals in doc/ with daily builds available online at http://rtems.org/onlinedocs/doc-current/share/rtems/html/ and released builds at http://www.rtems.org/onlinedocs/releases/ for information on building, installing, and using RTEMS. The INSTALL file tells you to come back here. See the RTEMS Wiki at http://wiki.rtems.org/wiki/index.php/Main_Page for community knowledge and tutorials. RTEMS Doxygen available at http://www.rtems.org/onlinedocs/doxygen/cpukit/html Get help on the mailing lists: * For general-purpose questions related to using RTEMS, use the rtems-users ml: http://www.rtems.org/mailman/listinfo/rtems-users * For questions and discussion related to development of RTEMS, use the rtems-devel ml: http://www.rtems.org/mailman/listinfo/rtems-devel See http://www.rtems.org/bugzilla/ to report a bug.