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* rtems: Fix Clock Manager parameter descriptionsSebastian Huber2021-12-221-8/+8
| | | | Update #4572.
* libfdt: overlay: make overlay_get_target() publicVikram Garhwal2021-12-141-0/+18
| | | | | | | | | | | This is done to get the target path for the overlay nodes which is very useful in many cases. For example, Xen hypervisor needs it when applying overlays because Xen needs to do further processing of the overlay nodes, e.g. mapping of resources(IRQs and IOMMUs) to other VMs, creation of SMMU pagetables, etc. Signed-off-by: Vikram Garhwal <fnu.vikram@xilinx.com> Message-Id: <1637204036-382159-2-git-send-email-fnu.vikram@xilinx.com> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* fdtget: Fix signedness comparisons warningsAndre Przywara2021-12-141-0/+7
| | | | | | | | | | | | | | | | | | | | | With -Wsign-compare, compilers warn about a mismatching signedness in the different legs of the conditional operator, in fdtget.c. In the questionable expression, we are constructing a 16-bit value out of two unsigned 8-bit values, however are relying on the compiler's automatic expansion of the uint8_t to a larger type, to survive the left shift. This larger type happens to be an "int", so this part of the expression becomes signed. Fix this by explicitly blowing up the uint8_t to a larger *unsigned* type, before doing the left shift. And while we are at it, convert the hardly readable conditional operator usage into a sane switch/case expression. This fixes "make fdtget", when compiled with -Wsign-compare. Signed-off-by: Andre Przywara <andre.przywara@arm.com> Message-Id: <20210618172030.9684-3-andre.przywara@arm.com> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* Set last_comp_version correctly in new dtb and fix potential version issues ↵Justin Covell2021-12-141-0/+1
| | | | | | | | | | | | | | | in fdt_open_into Changes in v3: - Remove noop version sets - Set version correctly on loaded fdt in fdt_open_into Fixes: f1879e1a50eb ("Add limited read-only support for older (V2 and V3) device tree to libfdt.") Signed-off-by: Justin Covell <jujugoboom@gmail.com> Message-Id: <20201229041749.2187-1-jujugoboom@gmail.com> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* libfdt: Internally perform potentially unaligned loadsTom Rini2021-12-141-5/+3
| | | | | | | | | | | | | | | | | | | | | Commits 6dcb8ba4 "libfdt: Add helpers for accessing unaligned words" introduced changes to support unaligned reads for ARM platforms and 11738cf01f15 "libfdt: Don't use memcpy to handle unaligned reads on ARM" improved the performance of these helpers. On further discussion, while there are potential cases where we could be used on platforms that do not fixup unaligned reads for us, making this choice the default is very expensive in terms of binary size and access time. To address this, introduce and use new fdt{32,64}_ld_ functions that call fdt{32,64}_to_cpu() as was done prior to the above mentioned commits. Leave the existing load functions as unaligned-safe and include comments in both cases. Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Tom Rini <trini@konsulko.com> Message-Id: <20201211022736.31657-1-trini@konsulko.com> Tested-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* libfdt: Check for 8-byte address alignment in fdt_ro_probe_()Tom Rini2021-12-141-1/+5
| | | | | | | | | | The device tree must be loaded in to memory at an 8-byte aligned address. Add a check for this condition in fdt_ro_probe_() and a new error code to return if we are not. Signed-off-by: Tom Rini <trini@konsulko.com> Message-Id: <20201104130605.28874-1-trini@konsulko.com> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* libfdt: Fix kernel-doc commentsAndre Przywara2021-12-141-36/+75
| | | | | | | | | | | | | | | | | | The API documentation in libfdt.h seems to follow the Linux kernel's kernel-doc format[1]. Running "scripts/kernel-doc -v -none" on the file reports some problems, mostly missing return values and missing parameter descriptions. Fix those up by providing the missing bits, and fixing the other small issues reported by the script. Signed-off-by: Andre Przywara <andre.przywara@arm.com> [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/doc-guide/kernel-doc.rst Message-Id: <20201012165331.25016-1-andre.przywara@arm.com> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* libfdt: add extern "C" for C++Patrick Oppenlander2021-12-141-0/+8
| | | | | | Signed-off-by: Patrick Oppenlander <patrick.oppenlander@gmail.com> Message-Id: <20200616011217.15253-1-patrick.oppenlander@gmail.com> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* rtems: Improve ordering in <rtems/rtems/intr.h>Sebastian Huber2021-12-131-284/+284
| | | | | Move the data structure definitions closer to the directives which use them.
* Avoid ISR_LOCK_MEMBER() since it confuses DoxygenSebastian Huber2021-12-096-7/+17
| | | | | If RTEMS_SMP is not defined, then Doxygen adds the comments intended for conditional the lock member to the next member.
* score: Fix _Workspace_Initialize_for_one_area()Sebastian Huber2021-12-071-14/+20
| | | | | | | In _Workspace_Initialize_for_one_area(), properly check if there is enough free memory available for the configured workspace size. The bug was introduced by commit 3d0620b607ff6459fec9d30efc1e0589bbd010f9.
* score: Fix atomic stores for C++Sebastian Huber2021-12-071-3/+3
| | | | Close #4566.
* rtems: Move all Interrupt Manager stuff to intr.hSebastian Huber2021-12-022-2274/+2272
| | | | | | Since the previous Interrupt Manager Extension API moved to the Interrupt Manager, we can move the interfaces to <rtems/rtems/intr.h> so that they are available via #include <rtems.h>.
* rtems: Move scheduler directives to own headerSebastian Huber2021-12-024-479/+561
| | | | | | Move all rtems_scheduler_* directives to the new header file <rtems/rtems/scheduler.h>. Add a Scheduler Manager API and implementation group.
* libc: Optimize malloc() initializationSebastian Huber2021-11-303-5/+191
| | | | | | | | | | | | | | | | The BSPs provide memory for the separate C Program Heap initialization via _Memory_Get(). Most BSPs provide exactly one memory area. Only two BSPs provide more than one memory area (arm/altera-cyclone-v and bsps/powerpc/mpc55xxevb). Only if more than one memory area is provided, there is a need to use _Heap_Extend(). Provide two implementations to initialize the separate C Program Heap and let the BSP select one of the implementations based on the number of provided memory areas. This gets rid of a dependency on _Heap_Extend(). It also avoids dead code sections for most BSPs. Change licence to BSD-2-Clause according to file history. Update #3053.
* score: Optimize Workspace Handler initializationSebastian Huber2021-11-303-10/+244
| | | | | | | | | | | | The BSPs provide memory for the workspace initialization via _Memory_Get(). Most BSPs provide exactly one memory area. Only two BSPs provide more than one memory area (arm/altera-cyclone-v and bsps/powerpc/mpc55xxevb). Only if more than one memory area is provided, there is a need to use _Heap_Extend(). Provide two implementations to initialize the workspace handler and let the BSP select one of the implementations based on the number of provided memory areas. This gets rid of a dependency on _Heap_Extend(). It also avoids dead code sections for most BSPs.
* 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 Huber2021-11-232-2/+7
| | | | | | | | | | 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: Move _Thread_queue_Extract()Sebastian Huber2021-11-231-1/+6
| | | | | | | 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 Huber2021-11-233-15/+9
| | | | | | | | | | 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 Huber2021-11-234-19/+41
| | | | | | | | 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.
* rtems: Fix rtems_scheduler_remove_processor()Sebastian Huber2021-11-232-12/+13
| | | | | | | | | | | | | | | | | | 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 Huber2021-11-234-83/+100
| | | | | | | | 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 Huber2021-11-231-48/+49
| | | | | | | | | 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 Huber2021-11-231-60/+53
| | | | 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: Add node to insert to Chain_Node_orderSebastian Huber2021-11-233-16/+44
| | | | | | This allows to use additional members of the nodes for comparision. Update #4534.
* score: Rework idle handling in SMP schedulersSebastian Huber2021-11-235-466/+427
| | | | | | | | | | | | | | | | | | 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 Huber2021-11-2310-77/+378
| | | | | | | | | | | | | | | | | | | | 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: Rework affine ready queue handlingSebastian Huber2021-11-231-2/+11
| | | | | | | | 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 Huber2021-11-231-5/+20
| | | | | | | 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 Huber2021-11-231-26/+30
| | | | | | 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 Huber2021-11-231-0/+26
| | | | | | | 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: 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: Use RTEMS_WHO_AM_I for rtems_task_ident()Sebastian Huber2021-11-181-1/+2
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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.
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