IDF release/v3.3 (#3672)

ESP-IDF release/v3.3: 66d3783c8
esp-face: 420fc7e
esp32-camera: 0107093

tools/sdk/include/esp32/esp_system.h

@@ -19,6 +19,7 @@
 #include <stdbool.h>
 #include "esp_err.h"
 #include "esp_sleep.h"
+#include "esp_idf_version.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -129,6 +130,16 @@ uint32_t system_get_time(void)  __attribute__ ((deprecated));
   */
 uint32_t esp_get_free_heap_size(void);
 
+/**
+ * @brief  Get the size of available internal heap.
+ *
+ * Note that the returned value may be larger than the maximum contiguous block
+ * which can be allocated.
+ *
+ * @return Available internal heap size, in bytes.
+ */
+uint32_t esp_get_free_internal_heap_size(void);
+
 /** @cond */
 /**
   * @brief  Get the size of available heap.
@@ -292,14 +303,6 @@ esp_err_t esp_derive_local_mac(uint8_t* local_mac, const uint8_t* universal_mac)
 const char* system_get_sdk_version(void)  __attribute__ ((deprecated));
 /** @endcond */
 
-/**
- * Get IDF version
- *
- * @return constant string from IDF_VER
- */
-const char* esp_get_idf_version(void);
-
-
 /**
  * @brief Chip models
  */
@@ -329,6 +332,15 @@ typedef struct {
  */
 void esp_chip_info(esp_chip_info_t* out_info);
 
+/**
+ * @brief Cache lock bug exists or not
+ *
+ * @return
+ *          - true : bug exists
+ *          - false : bug not exists
+ */
+bool soc_has_cache_lock_bug(void);
+
 #ifdef __cplusplus
 }
 #endif