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esp-idf/components/esp_system
History
Darian Leung 95955ed170 esp_system: Workaround esp_ipc_isr_stall_other_cpu() deadlock with SMP FreeRTOS 
SMP FreeRTOS uses a single kernel lock for all critical sections. There is a known
issue with esp_ipc_isr_stall_other_cpu() that can cause dead if the other CPU is
already in a critical section.

This commit adds a temporary workaround to reduce the chance of deadlock by taking
the SMP FreeRTOS kernel lock first before stalling the other CPU.

See IDF-5257 for more details.
2022-06-17 15:37:07 +08:00
..
include esp_psram: remove g_spiram_ok 2022-06-14 15:44:27 +08:00
ld bootloader, esp_system: increase static allocation space for esp32s3 2022-06-15 17:57:11 +05:30
port esp_system: Workaround esp_ipc_isr_stall_other_cpu() deadlock with SMP FreeRTOS 2022-06-17 15:37:07 +08:00
test clk_tree: Refactor rtc_clk.c by adding HAL layer for clock subsystem 2022-06-13 17:47:50 +08:00
test_apps test_rtc: remove invalid test case file 2022-06-06 00:36:21 +08:00
test_eh_frame_parser esp_hw_support/esp_system: Re-evaluate header inclusions and include directories 2022-03-07 11:18:08 +05:30
app.lf esp32: move common fragment definitions 2021-03-31 19:17:33 +08:00
CMakeLists.txt esp_psram: new psram component 2022-06-14 15:44:27 +08:00
crosscore_int.c This commit add to GDBstup: 2022-03-01 19:49:24 +03:00
debug_stubs.c debug_stubs: Refactor and add support for RISCV 2021-11-04 01:33:24 +03:00
eh_frame_parser.c esp_hw_support/esp_system: Re-evaluate header inclusions and include directories 2022-03-07 11:18:08 +05:30
esp_err.c esp_common: move esp_err 2021-02-24 12:16:37 +08:00
esp_ipc.c global: fix some potential out-of-bounds issue 2022-04-08 11:05:43 +08:00
esp_system.c freertos: Fix usage of vTaskSuspendAll()/xTaskResumeAll() 2022-03-08 14:59:18 +08:00
fpga_overrides.c ESP8684: add freertos, hal, esp_system support 2021-11-06 17:33:44 +08:00
freertos_hooks.c esp-system: removed esp_phy and nvs dependencies, change app update and pm to weak dependencies 2022-03-22 11:19:32 +08:00
int_wdt.c esp_system: Tidy up INT WDT 2022-05-18 20:12:25 +08:00
Kconfig Merge branch 'feature/support_refresh_brownout_v1' into 'master' 2022-06-06 16:27:58 +08:00
linker.lf system: add option to enable undefined behavior sanitizer (UBSAN) 2021-04-22 23:33:45 +02:00
panic.c esp-system: removed esp_phy and nvs dependencies, change app update and pm to weak dependencies 2022-03-22 11:19:32 +08:00
README.md esp_system: add notes on timekeeping 2021-03-25 16:09:33 +08:00
sdkconfig.rename system: move kconfig options out of target component 2022-03-02 01:22:26 +00:00
sdkconfig.rename.esp32 kconfig: move remaining kconfig options out of target component 2022-05-23 17:57:45 +08:00
sdkconfig.rename.esp32c3 soc: moved kconfig options out of the target component. 2022-04-21 12:09:43 +08:00
sdkconfig.rename.esp32h2 soc: moved kconfig options out of the target component. 2022-04-21 12:09:43 +08:00
sdkconfig.rename.esp32s2 soc: moved kconfig options out of the target component. 2022-04-21 12:09:43 +08:00
sdkconfig.rename.esp32s3 soc: moved kconfig options out of the target component. 2022-04-21 12:09:43 +08:00
stack_check.c esp_hw_support/esp_system: Re-evaluate header inclusions and include directories 2022-03-07 11:18:08 +05:30
startup.c esp_psram: remove g_spiram_ok 2022-06-14 15:44:27 +08:00
system_time.c esp8684: rename target to esp32c2 2022-01-19 11:08:57 +08:00
task_wdt.c esp_system: FIx TWDT SMP FreeRTOS unicore build error 2022-05-25 13:51:17 +08:00
ubsan.c esp_system: fix ubsan builtins' prototypes to suppress Wbuiltin-declaration-mismatch 2022-03-14 09:31:00 +00:00
xt_wdt.c esp_intr: Split RTC interrupt, making some of signals can be triggered with cache disabled 2022-06-02 10:38:55 +08:00

README.md

System Notes

Timekeeping

The following are the timekeeping mechanisms available and their differences:

  1. System time (esp_system_get_time)

Time with the origin at g_startup_time. The implementation is not handled by esp_system, but it does provide a default implementation using RTC timer. Currently, esp_timer provides system time, since the hardware timers are under the control of that component. However, no matter the underlying timer, the system time provider should maintain the definition of having the origin point at g_startup_time.

  1. esp_timer time (esp_timer_get_time)

This is the time read from an underlying hardware timer, controlled through config. Origin is at the point where the underlying timer starts counting.

  1. newlib time (gettimeofday)

Timekeeping function in standard library. Can be set (settimeofday) or moved forward/backward (adjtime); with the possibility of the changes being made persistent through config. Currently implemented in terms of system time, as the point of origin is fixed. If persistence is enabled, RTC time is also used in conjuction with system time.

  1. RTC time (esp_rtc_get_time_us)

Time read from RTC timer.