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* rtems+bsps/cache: Define cache manager operations for code synchronization ↵Pavel Pisa2016-10-021-0/+29
| | | | | | | | | | | | | | | | and maximal alignment. There is need for unambiguous named and defined cache function which should be called when code is updated, loaded or is self-modifying. There should be function to obtain maximal cache line length as well. This function can and should be used for allocations which can be used for data and or code and ensures that there are no partial cache lines overlaps on start and end of allocated region. Updates #2782
* various .h files: Add missing C++ extern wrappersMartin Galvan2015-09-031-1/+5
| | | | Updates #2405.
* score: Simplify <rtems/score/thread.h>Sebastian Huber2015-06-251-0/+1
| | | | | | Avoid Thread_Control typedef in <rtems/score/percpu.h>. This helps to get rid of the <rtems/score/percpu.h> include in <rtems/score/thread.h> which exposes a lot of implementation details.
* rtems: Add rtems_interrupt_local_disable|enable()Sebastian Huber2015-06-221-0/+38
| | | | | | | | Add rtems_interrupt_local_disable|enable() as suggested by Pavel Pisa to emphasize that interrupts are only disabled on the current processor. Do not define the rtems_interrupt_disable|enable|flash() macros and functions on SMP configurations since they don't ensure system wide mutual exclusion.
* Remove use ticks for statistics configure option.Joel Sherrill2015-06-153-51/+23
| | | | | | | | | | This was obsolete and broken based upon recent time keeping changes. Thie build option was previously enabled by adding USE_TICKS_FOR_STATISTICS=1 to the configure command line. This propagated into the code as preprocessor conditionals using the __RTEMS_USE_TICKS_FOR_STATISTICS__ conditional.
* rtems: Do not switch off the FP attributeSebastian Huber2015-06-111-4/+0
| | | | This is necessary after commit 335e5caa9a9e0f28acf94fe4c2871017fcd71794.
* cpukit/rtems: Fix doc for rtems_clock_get_ticks_per_secondGedare Bloom2015-06-091-1/+1
| | | | closes #2357.
* timecounter: Use in RTEMSAlexander Krutwig2015-05-201-26/+5
| | | | | | | | Replace timestamp implementation with FreeBSD bintime and timecounters. New test sptests/sptimecounter02. Update #2271.
* score: Fine grained locking for message queuesSebastian Huber2015-05-191-0/+15
| | | | | | | | | | | Aggregate several critical sections into a bigger one. Sending and receiving messages is now protected by an ISR lock. Thread dispatching is only disabled in case a blocking operation is necessary. The message copy procedure is done inside the critical section (interrupts disabled). Thus this change may have a negative impact on the interrupt latency in case very large messages are transferred. Update #2273.
* score: Add Thread_queue_Control::LockSebastian Huber2015-05-193-0/+4
| | | | | | | | | | | Move the complete thread queue enqueue procedure into _Thread_queue_Enqueue_critical(). It is possible to use the thread queue lock to protect state of the object embedding the thread queue. This enables per object fine grained locking in the future. Delete _Thread_queue_Enter_critical_section(). Update #2273.
* score: New timer server implementationSebastian Huber2015-05-192-26/+30
| | | | | | | | Use mostly the standard watchdog operations. Use a system event for synchronization. This implementation is simpler and offers better SMP performance. Close #2131.
* score: Add header to _Watchdog_Remove()Sebastian Huber2015-05-191-3/+10
| | | | | | | | Add watchdog header parameter to _Watchdog_Remove() to be in line with the other operations. Add _Watchdog_Remove_ticks() and _Watchdog_Remove_seconds() for convenience. Update #2307.
* score: _Objects_Get_isr_disable()Sebastian Huber2015-04-211-3/+7
| | | | | | | Use ISR_lock_Context instead of ISR_Level to allow use of ISR locks for low-level locking. Update #2273.
* score: Add Watchdog_HeaderSebastian Huber2015-04-131-2/+3
| | | | | | | This type is intended to encapsulate all state to manage a watchdog chain. Update #2307.
* cpukit: Remove old DESCRIPTION: in commentsJoel Sherrill2015-03-111-3/+5
| | | | These were remnants of pre-Doxygen comment style.
* cpukit: deprecate task variables. closes #2293.Gedare Bloom2015-03-102-4/+12
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* cpukit: deprecate rtems_clock_get(). closes #2294.Gedare Bloom2015-03-101-1/+4
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* cpukit: deprecate notepadsGedare Bloom2015-03-101-3/+9
| | | | | | | | | | | | | | | Deprecate Classic API Notepads. Mark task_set/get_note() with the deprecated attribute, and also mark the notepads field. Replace disable with enable option for notepads in confdefs.h, and make notepads disabled by default. The previous option CONFIGURE_DISABLE_CLASSIC_API_NOTEPADS is now unused and will emit a compile-time warning. A new option CONFIGURE_ENABLE_CLASSIC_API_NOTEPADS is available to turn on notepads, but it also will emit a compile-time warning to indicate that notepads are deprecated. Closes #2265
* Fix more Doxygen typosJoel Sherrill2015-03-061-1/+1
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* Fix a number of minor Doxygen formatting issuesJoel Sherrill2015-03-061-2/+2
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* score: Implement fine-grained locking for eventsSebastian Huber2015-03-051-35/+14
| | | | | | | Use the ISR lock of the thread object to protect the event state and use the Giant lock only for the blocking operations. Update #2273.
* score: C/C++ compatibility macros for ISR locksSebastian Huber2015-03-051-0/+45
| | | | Update #2273.
* libnetworking: Fix close of active socketsSebastian Huber2015-01-201-0/+5
| | | | | | | Send a special event to notify tasks waiting for a socket state change in case this socket gets closed. This prevents a use after free. Close #785.
* rtems: Add rtems_cache_coherent_allocate()Sebastian Huber2014-11-271-0/+61
| | | | Add rtems_cache_coherent_free() and rtems_cache_coherent_add_area().
* rtems: Add more clock tick functionsSebastian Huber2014-08-261-0/+71
| | | | | Add rtems_clock_tick_later(), rtems_clock_tick_later_usec() and rtems_clock_tick_before().
* rtems: Inline rtems_clock_get_ticks_since_boot()Sebastian Huber2014-08-251-7/+7
| | | | Update documentation.
* score: Add SMP support to the cache managerDaniel Cederman2014-08-221-0/+82
| | | | | | | | | Adds functions that allows the user to specify which cores that should perform the cache operation. SMP messages are sent to all the specified cores and the caller waits until all cores have acknowledged that they have flushed their cache. If CPU_CACHE_NO_INSTRUCTION_CACHE_SNOOPING is defined the instruction cache invalidation function will perform the operation on all cores using the previous method.
* Delete unused *_Is_null() functionsSebastian Huber2014-07-267-86/+0
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* rtems: Delete unused <rtems/rtems/atomic.h>Sebastian Huber2014-06-301-35/+0
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* score: _Scheduler_Set_affinity()Sebastian Huber2014-06-021-0/+11
| | | | | Do not change the scheduler with this function. Documentation. Coding style.
* score: Multiprocessor Resource Sharing ProtocolSebastian Huber2014-05-284-0/+100
| | | | | | | | | | | | | | | | | | | | | | Add basic support for the Multiprocessor Resource Sharing Protocol (MrsP). The Multiprocessor Resource Sharing Protocol (MrsP) is defined in A. Burns and A.J. Wellings, A Schedulability Compatible Multiprocessor Resource Sharing Protocol - MrsP, Proceedings of the 25th Euromicro Conference on Real-Time Systems (ECRTS 2013), July 2013. It is a generalization of the Priority Ceiling Protocol to SMP systems. Each MrsP semaphore uses a ceiling priority per scheduler instance. These ceiling priorities can be specified with rtems_semaphore_set_priority(). A task obtaining or owning a MrsP semaphore will execute with the ceiling priority for its scheduler instance as specified by the MrsP semaphore object. Tasks waiting to get ownership of a MrsP semaphore will not relinquish the processor voluntarily. In case the owner of a MrsP semaphore gets preempted it can ask all tasks waiting for this semaphore to help out and temporarily borrow the right to execute on one of their assigned processors. The help out feature is not implemented with this patch.
* rtems: Clarify task set/get scheduler parametersSebastian Huber2014-05-201-6/+6
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* rtems: Move extern "C" in <rtems.h>Sebastian Huber2014-05-121-4/+4
| | | | Do not cover the includes with an extern "C".
* rtems: Fix ASR SMP supportSebastian Huber2014-05-071-0/+10
| | | | Initialize the ISR lock only once and destroy it properly.
* score: Implement forced thread migrationSebastian Huber2014-05-071-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current implementation of task migration in RTEMS has some implications with respect to the interrupt latency. It is crucial to preserve the system invariant that a task can execute on at most one processor in the system at a time. This is accomplished with a boolean indicator in the task context. The processor architecture specific low-level task context switch code will mark that a task context is no longer executing and waits that the heir context stopped execution before it restores the heir context and resumes execution of the heir task. So there is one point in time in which a processor is without a task. This is essential to avoid cyclic dependencies in case multiple tasks migrate at once. Otherwise some supervising entity is necessary to prevent life-locks. Such a global supervisor would lead to scalability problems so this approach is not used. Currently the thread dispatch is performed with interrupts disabled. So in case the heir task is currently executing on another processor then this prolongs the time of disabled interrupts since one processor has to wait for another processor to make progress. It is difficult to avoid this issue with the interrupt latency since interrupts normally store the context of the interrupted task on its stack. In case a task is marked as not executing we must not use its task stack to store such an interrupt context. We cannot use the heir stack before it stopped execution on another processor. So if we enable interrupts during this transition we have to provide an alternative task independent stack for this time frame. This issue needs further investigation.
* score: DocumentationSebastian Huber2014-05-071-2/+6
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* score: SMP_FATAL_SCHEDULER_WITHOUT_PROCESSORSSebastian Huber2014-05-051-0/+2
| | | | | Avoid the SMP_FATAL_SCHEDULER_WITHOUT_PROCESSORS fatal error and make it a run-time error in rtems_scheduler_ident() and _Scheduler_Get_by_id().
* doc: rtems_task_set_scheduler()Sebastian Huber2014-04-171-0/+3
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* doc: rtems_get_processor_count()Sebastian Huber2014-04-171-8/+5
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* rtems: Add const qualifierSebastian Huber2014-04-161-3/+3
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* rtems: Add task get/set schedulerSebastian Huber2014-04-151-0/+35
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* rtems: Add scheduler get processorsSebastian Huber2014-04-151-0/+24
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* rtems: Add scheduler identificationSebastian Huber2014-04-151-0/+17
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* score: Task get/set affinitySebastian Huber2014-04-151-24/+26
| | | | | Make rtems_task_get_affinity() and rtems_task_set_affinity() available on non-SMP configurations. Allow larger CPU sets.
* score: Simplify thread control initializationSebastian Huber2014-04-151-1/+1
| | | | | | | | | | | The thread control block contains fields that point to application configuration dependent memory areas, like the scheduler information, the API control blocks, the user extension context table, the RTEMS notepads and the Newlib re-entrancy support. Account for these areas in the configuration and avoid extra workspace allocations for these areas. This helps also to avoid heap fragementation and reduces the per thread memory due to a reduced heap allocation overhead.
* rtems: Rename rtems_smp_get_current_processor()Sebastian Huber2014-04-111-6/+4
| | | | | | | Rename rtems_smp_get_current_processor() in rtems_get_current_processor(). Make rtems_get_current_processor() a function in uni-processor configurations to enable ABI compatibility with SMP configurations.
* rtems: Rename rtems_smp_get_processor_count()Sebastian Huber2014-04-111-4/+2
| | | | | | Rename rtems_smp_get_processor_count() in rtems_get_processor_count(). Make rtems_get_processor_count() a function in uni-processor configurations to enable ABI compatibility with SMP configurations.
* Disable per task variables when SMP is enabledJoel Sherrill2014-04-042-6/+12
| | | | | | Per task variables are inherently unsafe in SMP systems. This patch disables them from the build and adds warnings in the appropriate documentation and configuration sections.
* score: PR2152: Use allocator mutex for objectsSebastian Huber2014-03-312-18/+11
| | | | | Use allocator mutex for objects allocate/free. This prevents that the thread dispatch latency depends on the workspace/heap fragmentation.
* score: Thread life cycle re-implementationSebastian Huber2014-03-311-0/+3
| | | | | | | | | | | | | | | | | | | The thread deletion is now supported on SMP. This change fixes the following PRs: PR1814: SMP race condition between stack free and dispatch PR2035: psxcancel reveals NULL pointer access in _Thread_queue_Extract() The POSIX cleanup handler are now called in the right context (should be called in the context of the terminating thread). http://pubs.opengroup.org/onlinepubs/009695399/functions/xsh_chap02_09.html Add a user extension the reflects a thread termination event. This is used to reclaim the Newlib reentrancy structure (may use file operations), the POSIX cleanup handlers and the POSIX key destructors.
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