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Disable brown-out WDT, fix thread WDT, add panic reason indication to _xt_panic()

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This commit is contained in:
Jeroen Domburg
2016-10-25 17:05:13 +08:00
parent ae5c563080
commit 75a11589a1
9 changed files with 134 additions and 23 deletions
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54
components/freertos/panic.c
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@@ -25,8 +25,13 @@
#include "soc/io_mux_reg.h"
#include "soc/dport_reg.h"
#include "soc/rtc_cntl_reg.h"
#include "soc/timer_group_struct.h"
#include "gdbstub.h"
#include "panic.h"
#define WDT_WRITE_KEY 0x50D83AA1
/*
Panic handlers; these get called when an unhandled exception occurs or the assembly-level
@@ -130,10 +135,25 @@ static int inOCDMode() {
}
void panicHandler(XtExcFrame *frame) {
int *regs=(int*)frame;
//Please keep in sync with PANIC_RSN_* defines
const char *reasons[]={
"Unknown reason",
"Unhandled debug exception",
"Double exception",
"Unhandled kernel exception",
"Coprocessor exception",
"Interrupt wdt timeout"
};
const char *reason=reasons[0];
//The panic reason is stored in the EXCCAUSE register.
if (regs[20]<=PANIC_RSN_MAX) reason=reasons[regs[20]];
haltOtherCore();
panicPutStr("Guru Meditation Error: Core ");
panicPutDec(xPortGetCoreID());
panicPutStr(" panic'ed.\r\n");
panicPutStr(" panic'ed (");
panicPutStr(reason);
panicPutStr(")\r\n");
if (inOCDMode()) {
asm("break.n 1");
@@ -175,6 +195,33 @@ void xt_unhandled_exception(XtExcFrame *frame) {
}
//Disables all but one WDT, and allows enough time on that WDT to do what we need to do.
static void reconfigureAllWdts() {
TIMERG0.wdt_wprotect=WDT_WRITE_KEY;
TIMERG0.wdt_feed=1;
TIMERG0.wdt_config0.sys_reset_length=7; //3.2uS
TIMERG0.wdt_config0.cpu_reset_length=7; //3.2uS
TIMERG0.wdt_config0.stg0=3; //1st stage timeout: reset system
TIMERG0.wdt_config1.clk_prescale=80*500; //Prescaler: wdt counts in ticks of 0.5mS
TIMERG0.wdt_config2=2000; //1 second before reset
TIMERG0.wdt_config0.en=1;
TIMERG0.wdt_wprotect=0;
//Disable wdt 1
TIMERG1.wdt_wprotect=WDT_WRITE_KEY;
TIMERG1.wdt_config0.en=0;
TIMERG1.wdt_wprotect=0;
}
static void disableAllWdts() {
TIMERG0.wdt_wprotect=WDT_WRITE_KEY;
TIMERG0.wdt_config0.en=0;
TIMERG0.wdt_wprotect=0;
TIMERG1.wdt_wprotect=WDT_WRITE_KEY;
TIMERG1.wdt_config0.en=0;
TIMERG0.wdt_wprotect=0;
}
/*
We arrive here after a panic or unhandled exception, when no OCD is detected. Dump the registers to the
serial port and either jump to the gdb stub, halt the CPU or reboot.
@@ -187,6 +234,9 @@ void commonErrorHandler(XtExcFrame *frame) {
"A6 ","A7 ","A8 ","A9 ","A10 ","A11 ","A12 ","A13 ",
"A14 ","A15 ","SAR ","EXCCAUSE","EXCVADDR","LBEG ","LEND ","LCOUNT "};
//Feed the watchdogs, so they will give us time to print out debug info
reconfigureAllWdts();
panicPutStr("Register dump:\r\n");
for (x=0; x<24; x+=4) {
@@ -201,6 +251,7 @@ void commonErrorHandler(XtExcFrame *frame) {
panicPutStr("\r\n");
}
#if CONFIG_FREERTOS_PANIC_GDBSTUB
disableAllWdts();
panicPutStr("Entering gdb stub now.\r\n");
gdbstubPanicHandler(frame);
#elif CONFIG_FREERTOS_PANIC_PRINT_REBOOT || CONFIG_FREERTOS_PANIC_SILENT_REBOOT
@@ -208,6 +259,7 @@ void commonErrorHandler(XtExcFrame *frame) {
for (x=0; x<100; x++) ets_delay_us(1000);
software_reset();
#else
disableAllWdts();
panicPutStr("CPU halted.\r\n");
while(1);
#endif