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* libfdt: Add phandle generation helperThierry Reding2020-03-022-0/+37
| | | | | | | | | | | | | | | | | The new fdt_generate_phandle() function can be used to generate a new, unused phandle given a specific device tree blob. The implementation is somewhat naive in that it simply walks the entire device tree to find the highest phandle value and then returns a phandle value one higher than that. A more clever implementation might try to find holes in the current set of phandle values and fill them. But this implementation is relatively simple and works reliably. Also add a test that validates that phandles generated by this new API are indeed unique. Signed-off-by: Thierry Reding <treding@nvidia.com> Message-Id: <20190326153302.17109-3-thierry.reding@gmail.com> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* libfdt: Add new maximum phandle lookup functionThierry Reding2020-03-023-15/+46
| | | | | | | | | | | | | | | | | | | | | | The fdt_get_max_phandle() function has some shortcomings. On one hand it returns just a uint32_t which means to check for the "negative" error code a caller has to explicitly check against the error code (uint32_t)-1. In addition, the -1 is the only error code that can be returned, so a caller cannot tell the difference between the various failures. Fix this by adding a new fdt_find_max_phandle() function that returns an error code on failure and 0 on success, just like other APIs, and stores the maximum phandle value in an output argument on success. This also refactors fdt_get_max_phandle() to use the new function. Add a note pointing out that the new fdt_find_max_phandle() function should be preferred over fdt_get_max_phandle(). Signed-off-by: Thierry Reding <treding@nvidia.com> Message-Id: <20190326153302.17109-1-thierry.reding@gmail.com> [dwg: Reword for some inaccuracies in the commit message] Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* libfdt: add fdt_append_addrrange()AKASHI Takahiro2020-03-022-0/+108
| | | | | | | | | | | | | This function will append an address range property using parent node's "#address-cells" and "#size-cells" properties. It will be used in implementing kdump with kexec_file_load system call at linux kernel for arm64 once it is merged into kernel tree. Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> Message-Id: <20190327061552.17170-2-takahiro.akashi@linaro.org> [dwg: Correct a SEGV error in the testcase] Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* Revert "libfdt: Add phandle generation helper"David Gibson2020-03-023-51/+0
| | | | | | This reverts commit 54ea41c22415cb0e283d22faf71202051c89400c. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* libfdt: Add phandle generation helperThierry Reding2020-03-023-0/+51
| | | | | | | | | | | | | | | | | The new fdt_generate_phandle() function can be used to generate a new, unused phandle given a specific device tree blob. The implementation is somewhat naive in that it simply walks the entire device tree to find the highest phandle value and then returns a phandle value one higher than that. A more clever implementation might try to find holes in the current set of phandle values and fill them. But this implementation is relatively simple and works reliably. Also add a test that validates that phandles generated by this new API are indeed unique. Signed-off-by: Thierry Reding <treding@nvidia.com> Message-Id: <20190320151003.28941-1-thierry.reding@gmail.com> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* libfdt: Fix FDT_ERR_NOTFOUND typos in documentationGeert Uytterhoeven2020-03-021-2/+2
| | | | | | | | | The actual error is FDT_ERR_NOTFOUND, not FDT_ERR_NOT_FOUND. Fixes: d29126c90acb0d70 ("libfdt: Add iterator over properties") Fixes: 902d0f0953d0074b ("libfdt: Add a subnodes iterator macro") Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* libfdt: Fix fdt_getprop_by_offset() parameter name in documentationGeert Uytterhoeven2020-03-021-1/+1
| | | | | | | | The second parameter of fdt_getprop_by_offset() is called "offset", not "ffset". Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* libfdt: Don't use memcpy to handle unaligned reads on ARMDavid Gibson2020-03-021-7/+15
| | | | | | | | | | | | | | | 6dcb8ba4 "libfdt: Add helpers for accessing unaligned words" introduced the fdt32_ld() and fdt64_ld() helpers for loading values from the FDT blob which might not be naturally aligned. This matters for ARM, where attempting a plain unaligned load will often cause an exception. However, it seems the memcpy() we used here was surprisingly expensive, making libfdt nearly 6x slower on at least some ARM platforms. This patch takes an alternative approach, using a bunch of 1-byte loads and shifts to implement the helpers. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* libfdt: return correct value if #size-cells property is not presentJohn Clarke2020-03-022-4/+14
| | | | | | | | | | | | | According to the device tree specification, the default value for #size-cells is 1, but fdt_size_cells() was returning 2 if this property was not present. This patch also makes fdt_address_cells() and fdt_size_cells() conform to the behaviour documented in libfdt.h. The defaults are only returned if fdt_getprop() returns -FDT_ERR_NOTFOUND, otherwise the actual error is returned. Signed-off-by: John Clarke <johnc@kirriwa.net>
* score: Fix context switch extensions (SMP)Sebastian Huber2020-02-287-3/+74
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In uniprocessor and SMP configurations, the context switch extensions were called during _Thread_Do_dispatch(): void _Thread_Do_dispatch( Per_CPU_Control *cpu_self, ISR_Level level ) { Thread_Control *executing; executing = cpu_self->executing; ... do { Thread_Control *heir; heir = _Thread_Get_heir_and_make_it_executing( cpu_self ); ... _User_extensions_Thread_switch( executing, heir ); ... _Context_Switch( &executing->Registers, &heir->Registers ); ... } while ( cpu_self->dispatch_necessary ); ... } In uniprocessor configurations, this is fine and the context switch extensions are called for all thread switches except the very first thread switch to the initialization thread. However, in SMP configurations, the context switch may be invalidated and updated in the low-level _Context_Switch() routine. See: https://docs.rtems.org/branches/master/c-user/symmetric_multiprocessing_services.html#thread-dispatch-details In case such an update happens, a thread will execute on the processor which was not seen in the previous call of the context switch extensions. This can confuse for example event record consumers which use events generated by a context switch extension. Fixing this is not straight forward. The context switch extensions call must move after the low-level context switch. The problem here is that we may end up in _Thread_Handler(). Adding the context switch extensions call to _Thread_Handler() covers now also the thread switch to the initialization thread. We also have to save the last executing thread (ancestor) of the processor. Registers or the stack cannot be used for this purpose. We have to add it to the per-processor information. Existing extensions may be affected, since now context switch extensions use the stack of the heir thread. The stack checker is affected by this. Calling the thread switch extensions in the low-level context switch is difficult since at this point an intermediate stack is used which is only large enough to enable servicing of interrupts. Update #3885.
* config: Initialize IO drivers on demandSebastian Huber2020-02-264-13/+75
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* score: Fix label defined but not used warningSebastian Huber2020-02-251-0/+2
| | | | Update #3835.
* config: Resurrect NULL_DRIVER_TABLE_ENTRYSebastian Huber2020-02-251-1/+3
| | | | | | | This define may be used by application configurations for the CONFIGURE_APPLICATION_EXTRA_DRIVERS definition. Update #3875.
* config: Add <rtems/confdefs/wkspace.h>Sebastian Huber2020-02-253-263/+232
| | | | | | | | | | | Remove all comments and copyrightable content from the moved content. Use BSD-2-Clause license for new file. Change licence of <rtems/confdefs.h> to BSD-2-Clause according to file history. Update #3053. Close #3875.
* config: Add <rtems/confdefs/objectsposix.h>Sebastian Huber2020-02-253-198/+200
| | | | | | | | Remove all comments and copyrightable content from the moved content. Use BSD-2-Clause license for new file. Update #3053. Update #3875.
* config: Add <rtems/confdefs/wkspacesupport.h>Sebastian Huber2020-02-253-25/+66
| | | | | | | | Remove all comments and copyrightable content from the moved content. Use BSD-2-Clause license for new file. Update #3053. Update #3875.
* config: Add <rtems/confdefs/objectsclassic.h>Sebastian Huber2020-02-253-113/+129
| | | | | | | | Remove all comments and copyrightable content from the moved content. Use BSD-2-Clause license for new file. Update #3053. Update #3875.
* config: Add <rtems/confdefs/threads.h>Sebastian Huber2020-02-254-191/+238
| | | | | | | | Remove all comments and copyrightable content from the moved content. Use BSD-2-Clause license for new file. Update #3053. Update #3875.
* config: Add <rtems/confdefs/unlimited.h>Sebastian Huber2020-02-253-87/+149
| | | | | | | | Remove all comments and copyrightable content from the moved content. Use BSD-2-Clause license for new file. Update #3053. Update #3875.
* config: Add <rtems/confdefs/iodrivers.h>Sebastian Huber2020-02-253-147/+168
| | | | | | | | Remove all comments and copyrightable content from the moved content. Use BSD-2-Clause license for new file. Update #3053. Update #3875.
* config: Add <rtems/confdefs/console.h>Sebastian Huber2020-02-253-24/+87
| | | | | | | | Remove all comments and copyrightable content from the moved content. Use BSD-2-Clause license for new file. Update #3053. Update #3875.
* config: Add <rtems/confdefs/initthread.h>Sebastian Huber2020-02-253-56/+100
| | | | | | | | Remove all comments and copyrightable content from the moved content. Use BSD-2-Clause license for new file. Update #3053. Update #3875.
* config: Add <rtems/confdefs/inittask.h>Sebastian Huber2020-02-253-128/+134
| | | | | | | | Remove all comments and copyrightable content from the moved content. Use BSD-2-Clause license for new file. Update #3053. Update #3875.
* config: Add <rtems/confdefs/extensions.h>Sebastian Huber2020-02-253-103/+160
| | | | | | | | Remove all comments and copyrightable content from the moved content. Use BSD-2-Clause license for new file. Update #3053. Update #3875.
* config: Add <rtems/confdefs/newlib.h>Sebastian Huber2020-02-253-22/+75
| | | | | | | | Remove all comments and copyrightable content from the moved content. Use BSD-2-Clause license for new file. Update #3053. Update #3875.
* config: Add <rtems/confdefs/clock.h>Sebastian Huber2020-02-253-88/+111
| | | | | | | | Remove all comments and copyrightable content from the moved content. Use BSD-2-Clause license for new file. Update #3053. Update #3875.
* config: Add <rtems/confdefs/mcpi.h>Sebastian Huber2020-02-253-115/+149
| | | | | | | | Remove all comments and copyrightable content from the moved content. Use BSD-2-Clause license for new file. Update #3053. Update #3875.
* config: Add <rtems/confdefs/malloc.h>Sebastian Huber2020-02-256-39/+145
| | | | | | | | | | | Remove all comments and copyrightable content from the moved content. Use BSD-2-Clause license for new file. Move the default configuration to library files so that application configurations do not include the definitions for the default case. Update #3053. Update #3875.
* config: Add <rtems/confdefs/bdbuf.h>Sebastian Huber2020-02-253-98/+164
| | | | | | | | Remove all comments and copyrightable content from the moved content. Use BSD-2-Clause license for new file. Update #3053. Update #3875.
* config: Add <rtems/confdefs/scheduler.h>Sebastian Huber2020-02-253-452/+372
| | | | | | | | Remove all comments and copyrightable content from the moved content. Use BSD-2-Clause license for new file. Update #3053. Update #3875.
* config: Add <rtems/confdefs/libio.h>Sebastian Huber2020-02-253-448/+412
| | | | | | | | Remove all comments and copyrightable content from the moved content. Use BSD-2-Clause license for new file. Update #3053. Update #3875.
* config: Add <rtems/confdefs/percpu.h>Sebastian Huber2020-02-253-162/+161
| | | | | | | | | Remove comments and copyrightable content from the moved content. Use BSD-2-Clause for new file according to file history of <rtems/confdefs.h>. Update #3053. Update #3875.
* config: Add <rtems/confdefs/bsp.h>Sebastian Huber2020-02-253-13/+62
| | | | | | | | Remove all comments and copyrightable content from the moved content. Use BSD-2-Clause license for new file. Update #3053. Update #3875.
* config: Add <rtems/confdefs/libpci.h>Sebastian Huber2020-02-253-46/+72
| | | | | | Derive copyright and license for new file form the file history. Update #3875.
* config: Add <rtems/confdefs/obsolete.h>Sebastian Huber2020-02-254-166/+238
| | | | | | | | | Unify handling of obsolete configuration options. Remove comments and copyrightable content from the moved content. Use BSD-2-Clause license for new file. Update #3053. Update #3875.
* config: Remove _Configure_Max_Objects()Sebastian Huber2020-02-251-10/+3
| | | | | | | Use rtems_resource_maximum_per_allocation() directly. The use of _Configure_Zero_or_one() was superfluous. Update #3875.
* config: Improve _Configure_From_workspace()Sebastian Huber2020-02-251-1/+1
| | | | | | | | | Commit 4c09f4b3fefc7ba5c5868a97ad00c1ee14a06677 changed the cast from size_t to ssize_t to try to fix an workspace issue on 16-bit architectures. This change was reverted by commit 7ff6115b8b913d848b8fe76daf72ca0b4bbf2548 for the workspace but not _Configure_From_workspace(). Change the cast to uintptr_t to be in line with the Heap Handler.
* config: Remove CONFIGURE_DISABLE_SMP_CONFIGURATIONSebastian Huber2020-02-253-45/+0
| | | | | | | | | | The CONFIGURE_DISABLE_SMP_CONFIGURATION configuration option and rtems_configuration_is_smp_enabled() were added during the SMP support development cycle as a workaround to fix some testsuite failures in SMP configurations. All use cases were replaced with tests for specific conditions. The configuration option and test macro were undocumented. Close #3876.
* rtems: Change timer server task mode settingSebastian Huber2020-02-251-5/+7
| | | | | | Use the non-preempt mode only in uni-processor configurations. Update #3876.
* score: _Scheduler_Is_non_preempt_mode_supported()Sebastian Huber2020-02-255-4/+52
| | | | | | | | If the non-preempt mode for threads is supported depends on the scheduler implementation. Add _Scheduler_Is_non_preempt_mode_supported() to indicate this. Update #3876.
* config: CONFIGURE_INIT_TASK_INITIAL_MODESSebastian Huber2020-02-251-1/+1
| | | | | | | | | | Determine the default for CONFIGURE_INIT_TASK_INITIAL_MODES depeding on whether RTEMS_SMP is defined or not. In the tests, use CONFIGURE_INIT_TASK_INITIAL_MODES to explicitly request RTEMS_NO_PREEMPT mode if necessary. Update #3876.
* score: Add _SMP_Need_inter_processor_interrupts()Sebastian Huber2020-02-254-3/+19
| | | | | | | Test for the proper system condition instead of using the rtems_configuration_is_smp_enabled() workaround. Update #3876.
* libio: Add POSIX user environment pointer to TCBSebastian Huber2020-02-2510-58/+82
| | | | | | | | | | The IO library used a POSIX key to store an optional POSIX user environment pointer. This pulled in the POSIX keys support in every application configuration. Add a user environment pointer to the thread control block (TCB) instead. Applications which do not need the POSIX user environment will just get an overhead of one pointer per thread. Close #3882.
* config: Add _SMP_Is_enabledSebastian Huber2020-02-254-40/+20
| | | | | | | | | | Move the is SMP enabled configuration constant out of the configuration table. Since this was the last configuration constant in rtems_configuration_table, remove this type. Update #3875.
* config: Add _SMP_Processor_configure_maximumSebastian Huber2020-02-253-16/+23
| | | | | | | Move the processor maximum configuration constant out of the configuration table. Update #3875.
* config: Add _Workspace_Is_unifiedSebastian Huber2020-02-255-14/+48
| | | | | | | | | Move the unified workspace configuration constant out of the configuration table. Provide a default definition of the unified workspace constant. Update #3875.
* config: Add _Workspace_SizeSebastian Huber2020-02-254-7/+71
| | | | | | | Move the workspace size configuration constant out of the configuration table. Update #3875.
* config: Add _Thread_Idle_bodySebastian Huber2020-02-256-12/+55
| | | | | | | | | Move the idle thread body configuration constant out of the configuration table. Provide a default definition of the idle thread body constant. Update #3875.
* config: Add _Thread_Idle_stack_sizeSebastian Huber2020-02-255-10/+74
| | | | | | | | | | Move the idle thread stack size configuration constant out of the configuration table. Add THREAD_IDLE_STACK_SIZE_DEFAULT and use it to provide a default definition of the idle thread stack size constant. Update #3875.
* config: Add _Watchdog_Ticks_per_timesliceSebastian Huber2020-02-255-9/+58
| | | | | | | | | | Move the ticks per timeslice configuration constant out of the configuration table. Add WATCHDOG_TICKS_PER_TIMESLICE_DEFAULT and use it to provide a default definition of the watchdog ticks per timeslice constant. Update #3875.
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