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esp32: RWDT is used to reboot system in case of panic handler crash

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also fixes TG1WDG protection bug in panic handler
This commit is contained in:
Alexey Gerenkov
2017-03-29 21:09:47 +03:00
parent f9fba35d1d
commit c142b9b9e5
4 changed files with 65 additions and 2 deletions
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33
components/esp32/panic.c
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@@ -284,11 +284,37 @@ static void disableAllWdts()
TIMERG0.wdt_wprotect = 0;
TIMERG1.wdt_wprotect = TIMG_WDT_WKEY_VALUE;
TIMERG1.wdt_config0.en = 0;
TIMERG0.wdt_wprotect = 0;
TIMERG1.wdt_wprotect = 0;
}
#endif
static void esp_panic_wdt_start()
{
if (REG_GET_BIT(RTC_CNTL_WDTCONFIG0_REG, RTC_CNTL_WDT_EN)) {
return;
}
WRITE_PERI_REG(RTC_CNTL_WDTWPROTECT_REG, RTC_CNTL_WDT_WKEY_VALUE);
WRITE_PERI_REG(RTC_CNTL_WDTFEED_REG, 1);
REG_SET_FIELD(RTC_CNTL_WDTCONFIG0_REG, RTC_CNTL_WDT_SYS_RESET_LENGTH, 7);
REG_SET_FIELD(RTC_CNTL_WDTCONFIG0_REG, RTC_CNTL_WDT_CPU_RESET_LENGTH, 7);
REG_SET_FIELD(RTC_CNTL_WDTCONFIG0_REG, RTC_CNTL_WDT_STG0, RTC_WDT_STG_SEL_RESET_SYSTEM);
// 64KB of core dump data (stacks of about 30 tasks) will produce ~85KB base64 data.
// @ 115200 UART speed it will take more than 6 sec to print them out.
WRITE_PERI_REG(RTC_CNTL_WDTCONFIG1_REG, RTC_CNTL_SLOWCLK_FREQ*7);
REG_SET_BIT(RTC_CNTL_WDTCONFIG0_REG, RTC_CNTL_WDT_EN);
WRITE_PERI_REG(RTC_CNTL_WDTWPROTECT_REG, 0);
}
void esp_panic_wdt_stop()
{
WRITE_PERI_REG(RTC_CNTL_WDTWPROTECT_REG, RTC_CNTL_WDT_WKEY_VALUE);
WRITE_PERI_REG(RTC_CNTL_WDTFEED_REG, 1);
REG_SET_FIELD(RTC_CNTL_WDTCONFIG0_REG, RTC_CNTL_WDT_STG0, RTC_WDT_STG_SEL_OFF);
REG_CLR_BIT(RTC_CNTL_WDTCONFIG0_REG, RTC_CNTL_WDT_EN);
WRITE_PERI_REG(RTC_CNTL_WDTWPROTECT_REG, 0);
}
static inline bool stackPointerIsSane(uint32_t sp)
{
return !(sp < 0x3ffae010 || sp > 0x3ffffff0 || ((sp & 0xf) != 0));
@@ -343,6 +369,9 @@ static void commonErrorHandler(XtExcFrame *frame)
"A14 ", "A15 ", "SAR ", "EXCCAUSE", "EXCVADDR", "LBEG ", "LEND ", "LCOUNT "
};
// start panic WDT to restart system if we hang in this handler
esp_panic_wdt_start();
//Feed the watchdogs, so they will give us time to print out debug info
reconfigureAllWdts();
@@ -370,6 +399,7 @@ static void commonErrorHandler(XtExcFrame *frame)
#if CONFIG_ESP32_PANIC_GDBSTUB
disableAllWdts();
esp_panic_wdt_stop();
panicPutStr("Entering gdb stub now.\r\n");
esp_gdbstub_panic_handler(frame);
#else
@@ -383,6 +413,7 @@ static void commonErrorHandler(XtExcFrame *frame)
#endif
reconfigureAllWdts();
#endif
esp_panic_wdt_stop();
#if CONFIG_ESP32_PANIC_PRINT_REBOOT || CONFIG_ESP32_PANIC_SILENT_REBOOT
panicPutStr("Rebooting...\r\n");
esp_restart_noos();