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* sparc: Move ISR handler install routinesSebastian Huber2021-06-242-174/+201
| | | | | | | | Move _CPU_ISR_install_raw_handler() and _CPU_ISR_install_vector() to separate files. The goal is to make their use optional. Update #4458. Update #4459.
* score: Move _ISR_Vector_table[] to separate fileSebastian Huber2021-06-242-8/+48
| | | | | | | | | | The _ISR_Handler_initialization() does not touch the _ISR_Vector_table[]. Move the definition of _ISR_Vector_table[] to a separate file. Change license to BSD-2-Clause according to file history and re-licensing agreement. Update #3053.
* score: Remove bogus _ISR_Nest_level settingSebastian Huber2021-06-241-4/+0
| | | | | | | This variable is actually contained in _Per_CPU_Information[] which is already zero initialized. Remove superfluous includes.
* score: Remove _CPU_Initialize_vectors()Sebastian Huber2021-06-2413-76/+0
| | | | | | | This CPU port macro was not used. Since the _ISR_Vector_table[] is statically allocated, CPU ports could initialize this table in _CPU_Initialize() if necessary. Remove _CPU_Initialize_vectors() to simplify the CPU port interface.
* cpu/armv7m: Fix initialization of MPU regionsChristian Mauderer2021-06-211-1/+1
| | | | | | | | | | | The write to RBAR didn't have the valid flag set. Therefore the write to RASR had an influence on the previously set region. That means for example that if Region 0 had been enabled but 1 should be disabled due to a size of 0, the previous code would have disabled region 0 instead. This patch fixes that behaviour. Close #4450
* cpu/armv7m: Avoid regions with negative sizeChristian Mauderer2021-06-211-1/+1
| | | | | | | Don't initialze regions that have a negative size (for example due to a wrong calculation). Update #4450
* arm: Fix parameter use in AARCH32_PMSA_MEM_ATTR()Sebastian Huber2021-06-161-1/+1
| | | | Update #4202.
* score: Comment _Thread_queue_Surrender_sticky()Sebastian Huber2021-06-151-1/+7
| | | | | The change also helps to avoid reports from static analysers since most callers of _Thread_queue_Make_ready_again() check the unblock status.
* score: Add PER_CPU_DATA_NEED_INITIALIZATION()Sebastian Huber2021-06-102-42/+98
| | | | | | | | | Make the initialization of the per-CPU data optional. Change license to BSD-2-Clause according to file history and re-licensing agreement. Update #3053.
* score: Fix initialization of thread queue contextSebastian Huber2021-06-101-2/+2
| | | | | | | Set Thread_queue_Context::timeout_absolute in _Thread_queue_Context_set_timeout_argument() to avoid using it uninitialized. The bug was introduced by a89ecaa1a94d49ddae7753d6b83923e9d2a00486.
* libcsupport: Added futimens() and utimensat()Ryan Long2021-05-281-0/+54
| | | | | | | | | | Created futimens.c and utimensat.c to add support for the POSIX methods futimens() and utimensat(). utime() and utimes() are considered obsolote by POSIX, but RTEMS will continue to support them. Closes #4396
* bsps/aarch64: Add MMU driver to relax alignmentKinsey Moore2021-05-271-16/+50
| | | | | | | | | | | | | | | Currently, the AArch64 BSPs have a hard time running on real hardware without building the toolchain and the bsps with -mstrict-align in multiple places. Configuring the MMU on these chips allows for unaligned memory accesses for non-device memory which avoids requiring strict alignment in the toolchain and in the BSPs themselves. In writing this driver, it was found that the synchronous exception handling code needed to be rewritten since it relied on clearing SCTLR_EL1 to avoid thread stack misalignments in RTEMS_DEBUG mode. This is now avoided by exactly preserving thread mode stack and flags and the new implementation is compatible with the draft information provided on the mailing list covering the Exception Management API.
* bsps/aarch64: Break out system registersKinsey Moore2021-05-271-0/+9985
| | | | | Break out system register definitions and accessors so that they're usable by other parts of RTEMS.
* score/aarch64: Align context validation frameKinsey Moore2021-05-261-11/+18
| | | | | | Ensure the stack remains aligned by keeping the context frame at a multiple of 16 bytes. This avoids stack alignment exceptions which occur when the stack pointer is not 16 byte aligned.
* score: Direct thread dispatch in a self restartSebastian Huber2021-05-261-5/+11
| | | | | | | | | | Commit 73ebf9a27ed5cd0fd3e0dc0da98345d7faa610a2 accidentally removed the direct thread dispatch in a self thread restart. In case of a self restart (always in task context) the directive shall not return. If this is not possible due to a bad thread dispatch disable level, then a fatal error shall occur. Update #4412.
* score: Fix _Thread_Cancel()Sebastian Huber2021-05-261-26/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The _Thread_Cancel() (in contrast to _Thread_Restart() which used a similar code block) may have produced ready threads with an active timer in case the thread to cancel had its thread life protection enabled. The problem was this code block: Priority_Control priority; _Thread_Add_life_change_request( the_thread ); if ( _Thread_Is_life_change_allowed( previous ) ) { _Thread_State_release( the_thread, &lock_context ); _Thread_queue_Extract_with_proxy( the_thread ); _Thread_Timer_remove( the_thread ); } else { _Thread_Clear_state_locked( the_thread, STATES_SUSPENDED ); _Thread_State_release( the_thread, &lock_context ); } priority = _Thread_Get_priority( executing ); _Thread_Raise_real_priority( the_thread, priority ); _Thread_Remove_life_change_request( the_thread ); The life change request should only be added/removed if a life change is allowed (see _Thread_Restart()). Add _Thread_Try_life_change_request() and use it in _Thread_Cancel() and _Thread_Restart(). Close #4435.
* score: Simplify calling _Thread_Exit()Sebastian Huber2021-05-261-5/+13
| | | | | Move common code into _Thread_Exit(). This enables a tail call optimization in most cases.
* score: Simplify thread queue timeout handlingSebastian Huber2021-05-182-4/+12
| | | | | | | Add Thread_queue_Context::timeout_absolute to specify an absolute or relative timeout. This avoid having to get the current time twice for timeouts relative to the current time. It moves also functionality to common code.
* score: Add _CPU_Context_switch_no_return()Sebastian Huber2021-05-189-5/+56
| | | | | | | | | | | The __builtin_unreachable() cannot be used with current GCC versions to tell the compiler that a function does not return to the caller, see: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99151 Add a no return variant of _CPU_Context_switch() to avoid generation of dead code in _Thread_Start_multitasking() if RTEMS was built with SMP support enabled.
* score: Move _Thread_queue_Queue_get_name_and_id()Sebastian Huber2021-05-172-36/+76
| | | | | | | | | | Move this diagnostic function to a separate file since it does not provide a core function of the system. Change license to BSD-2-Clause according to file history and re-licensing agreement. Update #3053.
* score: Add and use _Per_CPU_Is_ISR_in_progress()Sebastian Huber2021-05-171-1/+1
| | | | | Add _Per_CPU_Is_ISR_in_progress() as an optimized version of _ISR_Is_in_progress().
* score: Improve parameters in _Thread_Change_life()Sebastian Huber2021-05-171-12/+17
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* rtems: Fix task restart within interrupt contextSebastian Huber2021-05-141-53/+15
| | | | | | | | | | | rtems_task_restart() may be called from within interrupt context. So checking only that the thread to restart is equal to the executing thread is insufficient to determine a self restart. We have to also check that no ISR is in progress. Merge _Thread_Restart_other() and _Thread_Restart_self() into one _Thread_Restart() since they share a lot of common code. Close #4412.
* rtems: Always set the real priority during restartSebastian Huber2021-05-141-26/+32
| | | | | | | Unconditionally set the real priority of the task to its initial priority during a task restart. Close #4411.
* score: Return status in _Thread_Restart_other()Sebastian Huber2021-05-141-3/+3
| | | | This simplifies rtems_task_restart().
* rtems: Use _Objects_Free_nothing() for msg queuesSebastian Huber2021-05-111-5/+3
| | | | | | | | Use _Objects_Free_nothing() for rtems_message_queue_construct() to avoid unreachable code in _CORE_message_queue_Close() in case only user-provided message buffers are used. Update #4007.
* score: Rename _Stack_Free_nothing()Sebastian Huber2021-05-111-5/+5
| | | | | | | Rename _Stack_Free_nothing() in _Objects_Free_nothing() to make it reusable for the message queue buffers. Update #4007.
* score: Make _Once_Lock() and _Once_Unlock() staticSebastian Huber2021-05-041-16/+16
| | | | These two functions are no longer used outside of _Once().
* score: Add _Thread_Dispatch_direct_no_return()Sebastian Huber2021-05-022-2/+5
| | | | | | | | | | The __builtin_unreachable() cannot be used with current GCC versions to tell the compiler that a function does not return to the caller, see: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99151 Add a no return variant of _Thread_Dispatch_direct() to avoid generation of dead code.
* Use alias for rtems_task_self() and pthread_self()Sebastian Huber2021-04-301-0/+53
| | | | This may reduce the code size a bit.
* objectextendinformation.c: Ensure information->object_blocks is not NULLRyan Long2021-04-291-0/+11
| | | | | | CID 26033: Dereference after null check in _Objects_Extend_information(). Closes #4326
* Return status code for _Thread_Start()Sebastian Huber2021-04-271-3/+3
| | | | | This avoids having conditional statements to get the API-specific status code.
* Return status code for _Scheduler_Set_affinity()Sebastian Huber2021-04-274-18/+18
| | | | | This avoids having conditional statements to get the API-specific status code.
* rtems: Change rtems_task_get_affinity() statusSebastian Huber2021-04-271-1/+1
| | | | | | | | | In case the processor set is not large enough to contain the processor affinity set of the task return RTEMS_INVALID_SIZE instead of RTEMS_INVALID_NUMBER. This is more in line with other directives since the issue is related to the size of an object. Close #4393.
* Return status code for _Scheduler_Get_affinity()Sebastian Huber2021-04-271-2/+7
| | | | | This avoids having conditional statements to get the API-specific status code.
* Remove superfluous <rtems/score/wkspace.h> includesSebastian Huber2021-04-2015-15/+0
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* score: Remove unused _Thread_queue_Dequeue()Sebastian Huber2021-04-201-32/+0
| | | | | | | | | | | | Last use was removed by: commit 54550e048d3a49435912797d2024f80671e93267 Author: Sebastian Huber <sebastian.huber@embedded-brains.de> Date: Fri May 13 08:16:30 2016 +0200 posix: Rework pthread_join() Rework pthread_join() to use _Thread_Join().
* cpukit/aarch64: Restore ISR cookie bit maskKinsey Moore2021-04-191-13/+13
| | | | | | | The _CPU_ISR_Is_enabled() function operates on ISR cookies and so must mask off the appropriate status bits. This also fixes the naming of the parameters of the _CPU_ISR_* functions to indicate use of ISR cookies instead of interrupt enable/disable levels.
* score: Replace Objects_Name_or_id_lookup_errorsSebastian Huber2021-04-073-17/+17
| | | | | Replace Objects_Name_or_id_lookup_errors with new Status_Control codes. Get rid of the _Status_Object_name_errors_to_status lookup table.
* cpukit/aarch64: Add ESR register decodingAlex White2021-04-061-10/+125
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* score: Add an assert to _Workspace_Free()Sebastian Huber2021-03-271-1/+5
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* score: Fix task stack initializationSebastian Huber2021-03-271-1/+0
| | | | | | | | | Do not adjust the stack area begin address since this may confuse the stack allocator and result in failed stack frees. Account for the alignment overhead in the stack space size estimate. Check that the stack size is in the expected interval.
* score: Add Thread_Configuration::cpu_time_budgetSebastian Huber2021-03-161-17/+1
| | | | | Move the CPU time budget to the thread configuration. This simplifies _Thread_Initialize().
* leon,tn-0018: work around GRLIB-TN-0018 errataDaniel Hellstrom2021-03-116-1/+105
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Overview ======== The errata is worked around in the kernel without requiring toolchain modifications. It is triggered the JMPL/RETT return from trap instruction sequence never generated by the compiler and. There are also other conditions that must must be true to trigger the errata, for example the instruction that the trap returns to has to be a JMPL instruction. The errata can only be triggered if certain data is corrected by ECC (inflicted by radiation), thus it can not be triggered under normal operation. For more information see: www.gaisler.com/notes Affected RTEMS target BSPs: * GR712RC * UT699 * UT700/699E The work around is enabled by defining __FIX_LEON3_TN0018 at build time. After applying the following GCC patch, GCC will set the define when compiling for an affected multilib: * GR712RC (-mcpu=leon3 -mfix-gr712rc) * UT700/UT699E (-mpcu=leon3 -mfix-ut700) * UT699 (-mcpu=leon -mfix-ut699) When building for another multilib and TN0018 is still required, it is possible to enable it on the RTEMS kernel configure line using the TARGET_CFLAGS (-D__FIX_LEON3FT_TN0018) or other by other means. The following GCC patch sets __FIX_LEON3FT_TN0018 for the affected RTEMS multilibs: --------- diff --git a/gcc/config/sparc/rtemself.h b/gcc/config/sparc/rtemself.h index 6570590..ddec98c 100644 --- a/gcc/config/sparc/rtemself.h +++ b/gcc/config/sparc/rtemself.h @@ -33,6 +33,8 @@ builtin_assert ("system=rtems"); \ if (sparc_fix_b2bst) \ builtin_define ("__FIX_LEON3FT_B2BST"); \ + if (sparc_fix_gr712rc || sparc_fix_ut700 || sparc_fix_ut699) \ + builtin_define ("__FIX_LEON3FT_TN0018"); \ } \ while (0) --------- Workaround Implementation ========================= In general there are two approaches that the workaround uses: A) avoid ECC restarting the RETT instruction B) avoid returning from trap to a JMPL instruction Where A) comes at a higher performance cost than B), so B) is used where posssible. B) can be achived for certain returns from trap handlers if trap entry is controlled by assembly, such as system calls. A) A special JMPL/RETT sequence where instruction cache is disabled temporarily to avoid RETT containing ECC errors, and reading of RETT source registers to "clean" them from incorrect ECC just before RETT is executed. B) The work around prevents JMPL after system calls (TA instruction) and modifies assembly code on return from traps jumping back to application code. Note that for some traps the trapped instruction is always re-executed and can therefore not trigger the errata, for example the SAVE instruction causing window overflow or an float instruction causing FPU disabled trap. RTEMS SPARC traps workaround implementation: NAME NOTE TRAP COMMENT * window overflow 1 - 0x05 always returns to a SAVE * window underflow 1 - 0x06 always returns to a RESTORE * interrupt traps 2 - 0x10..1f special rett sequence workaround * syscall 3 - 0x80 shutdown system - never returns * ABI flush windows 2 - 0x83 special rett sequence workaround * syscall_irqdis 4 - 0x89 * syscall_irqen 4 - 0x8A * syscall_irqdis_fp 1 - 0x8B always jumps back to FP instruction * syscall_lazy_fp_switch 5 - 0x04 A) jumps back to FP instruction, or to B) _Internal_error() starting with SAVE Notes: 1) no workaround needed because trap always returns to non-JMPL instruction 2) workaround implemented by special rett sequence 3) no workaround needed because system call never returns 4) workaround implemented by inserting NOP in system call generation. Thus fall into 1) when workaround is enabled and no trap handler fix needed. 5) trap handler branches into both 1) and returning to _Internal_error() which starts with a SAVE and besides since it shuts down the system that RETT should never be in cache (only executed once) so fix not necessary in this case. Any custom trap handlers may also have to be updated. To simplify that, helper work around assembly code in macros are available in a separate include file <libcpu/grlib-tn-0018.h>. Close #4155.
* sparc,leon: avoid triggering LEON3FT errata TN-0009Daniel Hellstrom2021-03-111-2/+3
| | | | Close #4336.
* sparc,leon: avoid triggering TN-0009 bad sequenceDaniel Hellstrom2021-03-111-1/+2
| | | | Update #4336.
* sparc: fix bad register alignment for 64 bit storeDaniel Hellstrom2021-03-111-1/+3
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* sparc: Remove sequences that the B2BST scan script warns aboutDaniel Cederman2021-03-112-3/+6
| | | | Update #4336.
* bsps/aarch64: RTEMS_DEBUG stack alignment faultsKinsey Moore2021-03-051-2/+8
| | | | | | Run with stack alignment faults enabled under RTEMS_DEBUG to catch any stack misalignments early. This makes it easier to track them down should they ever occur.
* score/aarch64: Fix interrupt level readsAlex White2021-03-052-3/+7
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