lp-core: Added support for abort() function on the LP core

This commit adds support for the abort() function on the LP core.

components/ulp/lp_core/lp_core/include/ulp_lp_core_utils.h

@@ -11,6 +11,7 @@ extern "C" {
 #endif
 
 #include <stdint.h>
+#include <stdlib.h>
 
 
 /**
@@ -53,6 +54,11 @@ void ulp_lp_core_delay_cycles(uint32_t cycles);
  */
 __attribute__((__noreturn__))  void ulp_lp_core_halt(void);
 
+/**
+ * @brief The LP core puts itself to sleep and disables all wakeup sources.
+ */
+__attribute__((__noreturn__))  void ulp_lp_core_stop_lp_core(void);
+
 #ifdef __cplusplus
 }
 #endif

components/ulp/lp_core/lp_core/lp_core_utils.c

@@ -63,3 +63,18 @@ void ulp_lp_core_halt(void)
 
     while(1);
 }
+
+void ulp_lp_core_stop_lp_core(void)
+{
+    /* Disable wake-up source and put lp core to sleep */
+    REG_SET_FIELD(PMU_LP_CPU_PWR1_REG, PMU_LP_CPU_WAKEUP_EN, 0);
+    REG_SET_FIELD(PMU_LP_CPU_PWR1_REG, PMU_LP_CPU_SLEEP_REQ, 1);
+}
+
+void __attribute__((noreturn)) abort(void)
+{
+    /* Stop the LP Core */
+    ulp_lp_core_stop_lp_core();
+
+    while (1);
+}