Audio services: Difference between revisions

← Older edit Newer edit →

@@ Line 1,420: / Line 1,420: @@
 | u8 array of channel mappings
 |}
+= Notes =
+Once nnMain finishes running, it calls a func which handles ADSP Aborts. This waits on an event, calls a func, then Aborts with Result 0xC0899.
+That func just calls another func, which:
+* Calls various AGIC funcs for this IRQ, etc.
+* Copies data from devicemem+0x608C (the 0x7000-byte devicemem "shared memory segment") to a stack struct.
+* A funcptr is called if set with the above struct, then this returns.
+That funcptr, besides other func-calls, will log an [[Error_Report_services|erpt]] using the input struct when set with the "AdspException*" fields.
+This is triggered by AGIC IRQ adsp_wdresetreq, "ADSP Watchdog Timer Reset Request". The ADSP updates the watchdog from a thread, so normally the watchdog only expires when the ADSP configures it to trigger immediately.
+When handling an assert/exception, the ADSP:
+* Logs exception info in text form into devicemem.
+* Logs the binary form of the exception into devicemem (offset above).
+* Eventually configures the watchdog to trigger immediately, prints "HALT: spinning forever...\n", then enters a loop using instruction "wfe".
 [[Category:Services]]