Define memory manager constants and add TODO

src/common/memory.c

@@ -2,14 +2,21 @@
 
 #include <util/atomic.h>
 
-static int   WriteRaw(word addr, byte data);
+#define MEM_SIZE       1024
+#define BLOCK_SIZE     sizeof(mem_data_t)
+#define MAX_BLOCKS     (MEM_SIZE / BLOCK_SIZE)
+#define SENTINEL_MASK  BIT(8)
+
 static byte  ReadRaw(word addr);
+static int   WriteRaw(word addr, byte data);
+static word  GetBlockAddress(void);
 
 int MEM_Read(mem_data_t *out)
 {
 	// TODO
 	UNUSED(out);
 	UNUSED(ReadRaw);
+	UNUSED(GetBlockAddress);
 	return 0;
 }
 
@@ -30,6 +37,11 @@ void MEM_Dump(void)
 	// }
 }
 
+static word GetBlockAddress(void)
+{
+	return 0;
+}
+
 static int WriteRaw(word addr, byte data)
 {
 	// The EEMWE bit determines whether setting EEWE to