FreeRTOS uses a single "xSchedulerRunning" variable to tack whether the
scheduler has started, and this variable is set to "pdTRUE" by core 0
via calling vTaskStartScheduler().
However, with SMP FreeRTOS, there is a race condition where core 0 has
already started the scheduler and another core has not called xPortStartScheduler()
yet and calls some FreeRTOS API. Thus the resultant FreeRTOS API can
cause errors as it thinks the scheduler has started.
This commit adds a temporary workaround (by having each core maintain their
own "xSchedulerRunning" variable.
prvYieldCore() leads to an array-out-of-bounds error when compiled with
-Os optimization and configNUM_CORES = 1. This commit avoids this
compile warning by compiling out the part of code which is unnecessary
when configNUM_CORES is 1.
SMP FreeRTOS adds support for dynamic reentrancy in the following commit:
34b8e24d7c
This commit does the following:
- Pulls in the upstream changes
- Move __getreent() to "freertos_tasks_c_additions.h"
- Add the required configNEWLIB_REENTRANT_IS_DYNAMIC to SMP FreeRTOS port
This commit updates how the TLS pointers deletion callbacks are called
during task deletion in the FreeRTOS SMP kernel. The callbacks are now
routed through the portCLEAN_UP_TCB() macro. This commit also adds a
new kconfig option CONFIG_FREERTOS_TLSP_DELETION_CALLBACKS to control
the enablement of the TLSP deletion callbacks.
This commit moves the IDF API additions from task.h/task.c to seperate header/source files.
- Declarations moved to "idf_additions.h"
- Definitions moved to "freertos_task_c_additions.h"
The API descriptions have also been updated.
This commit disables portUSING_MPU_WRAPPERS for the FreeRTOS SMP xtensa port.
This was previously enabled due to the need to keep a CPSA (coprocessor save
area pointer) in the TCB. The CPSA pointer is now calculated at run time.
This commit copies over the sources files from
https://github.com/FreeRTOS/FreeRTOS-Kernel/tree/smp based on the
commit 4832377117b4198db43009f2b548497d9cdbf8da
The FreeRTOS SMP sources are added to components/freertos/FreeRTOS-Kernel-SMP
Notes:
- This commit WILL NOT compile correctly. It simply copies over sources files
- copyright_ignore.txt entries added so that we can avoid using SPDX headers
- Portable files are not added yet
