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* score: Split wkspace.cSebastian Huber2021-11-303-15/+98
| | | | Splitting the file avoids unnecessary link-time dependencies.
* wkspace.c: Change license to BSD-2-ClauseSebastian Huber2021-11-301-5/+24
| | | | | | Change licence according to file history. Update #3053.
* arm: Add AARCH32_PMSA_DATA_READ_WRITE_DEFAULTSebastian Huber2021-11-301-8/+28
| | | | | | | Add default memory attributes for read-write data. The actual attributes depend on the RTEMS_SMP build option. Update #4202.
* arm: Fix AARCH32_PMSA_DATA_READ_WRITE_CACHEDSebastian Huber2021-11-301-1/+1
| | | | | | | Fix definition of AARCH32_PMSA_DATA_READ_WRITE_CACHED. Since AARCH32_PMSA_ATTR_AP_EL1_RW_EL0_NO is zero, this fix is only cosmetic. Update #4202.
* */aclocal/*: Remove remnants of autoconf/automae build systemJoel Sherrill2021-11-2932-670/+0
| | | | Updates #4081.
* sparc: Add workaround for GRLIB-TN-0011Sebastian Huber2021-11-261-0/+12
| | | | | | | | | | Affected components are the GR712RC, UT699, UT699E, UT700, and LEON3FT-RTAX. Strictly, the workaround is only necessary if the MMU is enabled. Use __FIX_LEON3FT_B2BST to enable the workaround. This is not 100% appropriate, but the best thing we can use to enable the workaround. Close #4551.
* rtems: Replace "precision" with "resolution"Sebastian Huber2021-11-231-32/+32
| | | | Resolution is the right term for the documented property.
* score: Properly continue the thread during restartSebastian Huber2021-11-234-16/+12
| | | | | | | | | | The _Thread_queue_Extract() does not deal with potential priority updates and the SMP locking protocol handling. Use _Thread_queue_Continue(). For the POSIX signals processing this is currently probably unnecessary, however, the use case is similar to the restart so use the same appoach. Close #4546.
* score: _Thread_queue_Surrender_no_priority()Sebastian Huber2021-11-231-15/+1
| | | | | | | Simplify _Thread_queue_Surrender_no_priority() and use _Thread_queue_Resume(). Update #4546.
* score: Move _Thread_queue_Extract()Sebastian Huber2021-11-233-35/+66
| | | | | | | Move _Thread_queue_Extract() since this function is not used by the core services (threads, semaphores, mutexes, message queues). Update #4546.
* score: Simplify thread wait state handlingSebastian Huber2021-11-239-38/+23
| | | | | | | | | | Remove the THREAD_WAIT_STATE_READY_AGAIN and simply use the initial value to indicate that a thread does not wait on something. Rename THREAD_WAIT_FLAGS_INITIAL to THREAD_WAIT_STATE_READY. This change is necessary so that _Thread_Continue() can be called for threads which never waited on something (for example dormant threads). Update #4546.
* score: Add _Thread_MP_Extract_proxy()Sebastian Huber2021-11-237-53/+77
| | | | | | | | Remove _Thread_queue_Extract_with_proxy() and move the proxy extraction to _Thread_MP_Extract_proxy(). Move similar code blocks of the previous caller of _Thread_queue_Extract_with_proxy() to helper functions. Update #4546.
* score: Remove thread timer earlierSebastian Huber2021-11-231-2/+2
| | | | | | | The earlier we remove the thread timer the less likely is a superfluous thread timeout processing. Update #4546.
* score: Restrict affinity for EDF SMP schedulerSebastian Huber2021-11-231-6/+27
| | | | | | | | | | | | | | | | | | The SMP EDF scheduler supports a one-to-one and one-to-all thread to processor affinity. It accepted affinity sets which are a proper subset of the online processor containing at least two processors owned by the scheduler. In this case it used a one-to-one thread to processor affinity. This leads to undefined behaviour if a processor is removed since the higher level check in rtems_scheduler_remove_processor() does not account for this implementation detail. Restrict the affinity set accepted by the SMP EDF scheduler to 1. all online processors, or 2. exactly one processor owned by the scheduler. Close #4545.
* rtems: Fix rtems_scheduler_remove_processor()Sebastian Huber2021-11-233-14/+61
| | | | | | | | | | | | | | | | | | Return an error status for the following error condition in rtems_scheduler_remove_processor(): While an attempt is made to remove a processor from a scheduler, while the processor is the only processor owned by the scheduler, if a thread exists which uses the scheduler as a helping scheduler, then the processor shall not be removed. The reason is that ask for help requests and withdraw node requests are processed asynchronously in any order. An ask for help request carried out on a scheduler without a processor is undefined behaviour. Update error status description. Update #4544.
* score: Fix assertion in SMP scheduler frameworkSebastian Huber2021-11-231-6/+9
| | | | | | Properly assert that the scheduled chain is not empty. Fix formatting. Close #4531.
* score: Rework ask for help requestsSebastian Huber2021-11-236-102/+112
| | | | | | | | Process ask for help requests on the current processor. This avoids using inter-processor interrupts to make the system behaviour a bit more predictable. Update #4531.
* score: _Scheduler_SMP_Schedule_highest_ready()Sebastian Huber2021-11-236-68/+59
| | | | | | | | | Simplify callers of _Scheduler_SMP_Schedule_highest_ready(). Move the node state change and the extraction from scheduled into _Scheduler_SMP_Schedule_highest_ready(). Move the idle thread release to the caller which have more information about the presence of an idle thread. Update #4531.
* score: Remove victim thread from CPU allocationSebastian Huber2021-11-233-80/+65
| | | | Update #4531.
* score: Move _Scheduler_Unblock_node()Sebastian Huber2021-11-232-71/+35
| | | | | | | Move _Scheduler_Unblock_node() into _Scheduler_SMP_Unblock(). This simplifies the code and makes it easier to review. Update #4531.
* score: Move _Scheduler_Block_node()Sebastian Huber2021-11-232-81/+46
| | | | | | | Move _Scheduler_Block_node() into _Scheduler_SMP_Block(). This simplifies the code and makes it easier to review. Update #4531.
* score: Simplify _Scheduler_SMP_Yield()Sebastian Huber2021-11-231-10/+1
| | | | | There is not need to actively ask for help in a yield operation. The helping is already done on demand by the other scheduler operations.
* score: Fix SMP EDF priority group orderingSebastian Huber2021-11-231-13/+61
| | | | | | | | | | | | | | | | | | | | | | | | The SMP EDF scheduler supports one-to-one and one-to-all thread to processor affinities. The one-to-one thread to processor affinity introduces a constraint on the ordering of threads. The implementation uses one ready queue for threads which have a one-to-all affinity and one for each one-to-one affinity group. To order threads across the ready queues, a generation number is used. However, the approach to update the generation number each time a thread is inserted into a ready queue was wrong. The generation number needs to be updated only in the enqueue and enqueue scheduled operations where an insert priority is available. The scheduled chain needs to take the generation number into account. An example scenario which shows the bug is this. Let T be a high priority task affine to processor X. Let A be a lower priority task affine to processor X. Let B be a lower priority task with no affinity to a particular processor which executes on processor Y. Let B be in the same priority group than A and after A. Let T set the affinity to all processors. Now A (higher priority relative to B) should execute on X and T (high priority) should execute on Y. Close #4534.
* score: Add node to insert to Chain_Node_orderSebastian Huber2021-11-235-20/+52
| | | | | | This allows to use additional members of the nodes for comparision. Update #4534.
* score: Rework idle handling in SMP schedulersSebastian Huber2021-11-2310-514/+686
| | | | | | | | | | | | | | | | | | This patch fixes an issue with the idle thread handling in the SMP scheduler framework used for the MrsP locking protocol. The approach to use a simple chain of unused idle threads is broken for schedulers which support thread to processor affinity. The reason is that the thread to processor affinity introduces another ordering indicator which may under certain conditions lead to a reordering of idle threads in the scheduled chain. This reordering is not propagated to the chain of unused idle threads. This could lead to use an idle thread for a sticky scheduler node which is already in use. This locks up the system in infinite loops in the thread context switch procedure. To fix this, the SMP scheduler implementations must now provide callbacks to get and release an unused idle thread. Update #4531.
* score: Add SMP scheduler make/clean stickySebastian Huber2021-11-2318-91/+740
| | | | | | | | | | | | | | | | | | | | This patch fixes the following broken behaviour: While a thread is scheduled on a helping scheduler, while it does not own a MrsP semaphore, if it obtains a MrsP semaphore, then no scheduler node using an idle thread and the ceiling priority of the semaphore is unblocked for the home scheduler. This could lead to priority inversion issues and is not in line with the MrsP protocol. Introduce two new scheduler operations which are only enabled if RTEMS_SMP is defined. The operations are used to make the scheduler node of the home scheduler sticky and to clean the sticky property. This helps to keep the sticky handing out of the frequently used priority update operation. Close #4532.
* score: Add SMP scheduler idle exchange callbackSebastian Huber2021-11-231-0/+19
| | | | Update #4531.
* score: Optimize SMP EDF move to ready operationSebastian Huber2021-11-231-7/+13
| | | | | | | | If a node is moved from the scheduled chain to the ready queue, then we know that it is the highest priority ready node. So, it can be prepended to the ready queue without doing any comparisons. Update #4531.
* score: Rework affine ready queue handlingSebastian Huber2021-11-232-42/+77
| | | | | | | | Rework the handling of the affine ready queue for the EDF SMP scheduler. Do the queue handling in the node insert, move, and extract operations. Remove the queue handling from _Scheduler_EDF_SMP_Allocate_processor(). Update #4531.
* score: Use extract from scheduled callbacksSebastian Huber2021-11-236-5/+41
| | | | | | | Use the extract from scheduled callback provided by the scheduler implementation in the SMP scheduler framework. Update #4531.
* score: Remove return value from enqueue scheduledSebastian Huber2021-11-236-36/+40
| | | | | | The return value was unused. Remove it. Update #4531.
* score: Scheduler insert after moveSebastian Huber2021-11-231-5/+5
| | | | | | | | Insert nodes after moving the second node to reduce the items in the data structure for the insert operation. This also avoids having two nodes for the same processor inserted into the scheduled chain. Update #4531.
* score: Add missing idle thread exchangesSebastian Huber2021-11-231-0/+18
| | | | Update #4531.
* score: Add missing idle thread releasesSebastian Huber2021-11-231-0/+12
| | | | Update #4531.
* score: Simplify _Scheduler_Exchange_idle_thread()Sebastian Huber2021-11-232-17/+11
| | | | | | Remove superfluous idle parameter. Update #4531.
* score: Change _Scheduler_Try_to_schedule_node()Sebastian Huber2021-11-232-6/+6
| | | | | | Add the victim node as parameter instead of the idle thread. Update #4531.
* score: Not set CPU in _Scheduler_Use_idle_thread()Sebastian Huber2021-11-231-14/+8
| | | | | | | | Do not set the CPU of the idle thread in _Scheduler_Use_idle_thread(). This helps to use _Scheduler_Try_to_schedule_node() under more general conditions in the future, for example in case the owner and user of a node are not the same. Update #4531.
* score: Rename _Scheduler_Set_idle_thread()Sebastian Huber2021-11-232-22/+23
| | | | | | | Rename _Scheduler_Set_idle_thread() in _Scheduler_Node_set_idle_user() and move it to <rtems/score/schedulernodeimpl.h>. Update #4531.
* score: Add red-black tree append/prependSebastian Huber2021-11-233-0/+142
| | | | | | | These functions are a faster alternative to _RBTree_Insert_inline() if it is known that the new node is the maximum/minimum node. Update #4531.
* score: Simplify _Scheduler_Generic_block()Sebastian Huber2021-11-231-1/+1
| | | | | | If we block the executing thread and it is not the heir thread, then there is no need to run the schedule operation. The scheduler already selected a new heir.
* cpukit: Consistize OAR copyright headersKinsey Moore2021-11-222-2/+2
| | | | | | These two OAR copyright headers are the only two in the codebase with a format that differs from the typical OAR copyright header. This makes all of the OAR copyright headers consistent.
* cpukit: Enable debug for SMP AArch64Kinsey Moore2021-11-221-9/+22
| | | | | | | Ensure when both RTEMS_DEBUG is specified and pointers are large that enough space is allocated to accomodate the Per_CPU_Control structure. This changes the calculation to be more compositional instead of trying to list out every permutation of options possible.
* rtems: Add external functionsSebastian Huber2021-11-182-0/+108
| | | | | | These external functions rtems_scheduler_get_processor() and rtems_scheduler_get_processor_maximum() which may be used by bindings for languages other than C/C++.
* rtems: Use RTEMS_WHO_AM_I for rtems_task_ident()Sebastian Huber2021-11-182-2/+4
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* rtems: Add signal header to implementation groupSebastian Huber2021-11-172-0/+4
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* config: Fix IO driver table initializationSebastian Huber2021-11-171-32/+31
| | | | | | | | | | | | | | | Check all IO driver table configuration options which are used to initialize _IO_Driver_address_table[]. Checks for the following settings were missing: * CONFIGURE_BSP_PREREQUISITE_DRIVERS * CONFIGURE_APPLICATION_PREREQUISITE_DRIVERS * CONFIGURE_APPLICATION_NEEDS_WATCHDOG_DRIVER * CONFIGURE_APPLICATION_EXTRA_DRIVERS Update #3875.
* config: CONFIGURE_DISABLE_BSP_SETTINGSSebastian Huber2021-11-175-21/+19
| | | | | | | | Evaluate CONFIGURE_DISABLE_BSP_SETTINGS for each affected application configuration option. This makes the code easier to review since the influence of CONFIGURE_DISABLE_BSP_SETTINGS is locally visible in the code. Update #3875.
* rtems: Add new clock manager directivesSebastian Huber2021-11-152-0/+648
| | | | Update #4527.
* rtems: Simplify rtems_semaphore_set_priority()Sebastian Huber2021-11-151-25/+22
| | | | | Do not write to the object referenced by old_priority in error paths. This is in line with other directives.
* score: Fix _CORE_ceiling_mutex_Set_priority()Sebastian Huber2021-11-152-8/+9
| | | | | | | We have to use a second thread queue context to acquire and release the thread wait lock. Close #4356.
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