shared memory structure changes for CODK-M

-added struct for ipm using shared memory
-added cdc-acm buffer space on shared memory which is used by the new firmware

Author: bigdinotech

system/libarc32_arduino101/framework/include/platform.h

@@ -40,6 +40,7 @@
 #define NUM_CPU     4
 
 #define CDCACM_BUFFER_SIZE 256
+#define SHARED_BUFFER_SIZE 64
 
 struct cdc_ring_buffer
 {
@@ -62,6 +63,30 @@ struct cdc_acm_shared_data {
     int device_open;
 };
 
+struct shared_ring_buffer
+{
+    /** Ring buffer data */
+    volatile uint8_t data[SHARED_BUFFER_SIZE];
+    /** Ring buffer head index, modified by producer */
+    volatile int head;
+    /** Ring buffer tail index, modified by consumer */
+    volatile int tail;
+
+    /** Buffer status
+     * 0 - locked by X86 core
+     * 1 - locked by arc core
+     * 2 - available to be taken by any core
+    **/
+    volatile int flag;
+};
+
+struct ipm_shared_data
+{
+    struct shared_ring_buffer *quark_buffer;
+    struct shared_ring_buffer *arc_buffer;
+};
+
+
 /**
  * LMT / ARC global shared structure. This structure lies in the beginning of
  * the RAM.
@@ -109,6 +134,18 @@ struct platform_shared_block_ {
      * The ARC core counts on QRK to find valid pointers in place.
      */
     struct cdc_acm_shared_data	* cdc_acm_buffers;
+    
+    struct cdc_acm_shared_data cdc_acm_buffers_obj;
+
+    struct cdc_ring_buffer cdc_acm_shared_rx_buffer;
+    struct cdc_ring_buffer cdc_acm_shared_tx_buffer;
+    
+    struct ipm_shared_data *ipm_shared_data_ptr;
+
+    struct ipm_shared_data ipm_shared_data_obj;
+
+    struct shared_ring_buffer quark_to_ARC;
+    struct shared_ring_buffer ARC_to_quark;
 };
 
 #define RAM_START           0xA8000000