esp-idf/components/freertos/port
Ivan Grokhotkov dc707d5933 freertos: ensure interrupts are disabled before enabling tick timer
xPortStartScheduler calls vPortSetupTimer -> _frxt_tick_timer_init,
which enables tick timer interrupt and sets up the first timeout.
From that point on, the interrupt can fire. If the interrupt happens
while _frxt_dispatch is running, the scheduler will enter an infinite
loop. This is because _frxt_dispatch isn't supposed to be preemptable,
and the tick interrupt will overwrite some of the registers used by
_frxt_dispatch.
Note that this situation doesn't practically occur on the real
hardware, where the execution of vPortSetupTimer and _frxt_dispatch
happens quickly enough. However it can be reproduced on an emulator
if the tick period is set to 1ms.

Add an explicit call to portDISABLE_INTERRUPTS in xPortStartScheduler
to guarantee that _frxt_dispatch doesn't run with interrupts enabled.
This is similar to the esprv_intc_int_set_threshold(1); call in
RISC-V version of port.c.
2021-12-30 18:00:59 +08:00
..
linux/include/freertos freertos: updated the location of FreeRTOSConfig.h 2021-09-14 08:46:01 +05:30
priv_include freertos(esp32s3): SysTick uses systimer 2021-08-04 20:33:44 +08:00
riscv freertos: Add portTRY_ENTRY_CRITICAL() and deprecate legacy spinlock fucntions 2021-11-22 18:42:10 +08:00
xtensa freertos: ensure interrupts are disabled before enabling tick timer 2021-12-30 18:00:59 +08:00
port_common.c freertos: Add memory hooks for static IDLE and Timer tasks 2021-11-02 14:54:01 +08:00
port_systick.c freertos: Fix settings of systimer for SysTicks in case Unicore 2021-08-12 12:30:52 +05:00