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esp_hw_support: Fix invalid system time if s_esp_rtc_time_us & s_rtc_last_ticks were moved around

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The commit fixes the case:
If variables in RTC RAM have been moved around by the linker,
they will be filled with garbage data. Any reset other than OTA would work fine
because the variables would still be initialized from the initial bootup.

So now system time will be valid even after OTA.

Closes https://github.com/espressif/esp-idf/issues/9448
This commit is contained in:
KonstantinKondrashov
2023-04-01 00:41:40 +08:00
parent 69d152fd89
commit cb6e2133f0
24 changed files with 332 additions and 117 deletions
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5
components/heap/port/esp32c3/memory_layout.c
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@@ -77,7 +77,7 @@ const soc_memory_region_t soc_memory_regions[] = {
{ 0x3FCC0000, (APP_USABLE_DRAM_END-0x3FCC0000), SOC_MEMORY_TYPE_DEFAULT, 0x403C0000}, //D/IRAM level3, can be used as trace memory
{ APP_USABLE_DRAM_END, (SOC_DIRAM_DRAM_HIGH-APP_USABLE_DRAM_END), SOC_MEMORY_TYPE_STACK_DEFAULT, MAP_DRAM_TO_IRAM(APP_USABLE_DRAM_END)}, //D/IRAM level3, can be used as trace memory (ROM reserved area)
#ifdef CONFIG_ESP_SYSTEM_ALLOW_RTC_FAST_MEM_AS_HEAP
{ 0x50000000, 0x2000, SOC_MEMORY_TYPE_RTCRAM, 0}, //Fast RTC memory
{ 0x50000000, 0x2000, SOC_MEMORY_TYPE_RTCRAM, 0}, //Fast RTC memory
#endif
};
@@ -85,6 +85,7 @@ const size_t soc_memory_region_count = sizeof(soc_memory_regions) / sizeof(soc_m
extern int _data_start, _heap_start, _iram_start, _iram_end, _rtc_force_slow_end;
extern int _rtc_reserved_start, _rtc_reserved_end;
/**
* Reserved memory regions.
@@ -106,3 +107,5 @@ SOC_RESERVE_MEMORY_REGION((intptr_t)&_iram_start - I_D_OFFSET, (intptr_t)&_iram_
*/
SOC_RESERVE_MEMORY_REGION(SOC_RTC_DRAM_LOW, (intptr_t)&_rtc_force_slow_end, rtcram_data);
#endif
SOC_RESERVE_MEMORY_REGION((intptr_t)&_rtc_reserved_start, (intptr_t)&_rtc_reserved_end, rtc_reserved_data);