samples/cxl_mem_tg: 16GB memory support is added for MEM_TG (#3058)

Problem/Feature : In code only 48KB support is available for MEM_TG
Fix/Workaround :  Extended it to 16GB.
Changes made : 1.samples/cxl_mem_tg/cxl_mem_tg.h and samples/cxl_mem_tg/cxl_tg_test.h are
               updated accordingly.
               2. Review comments from Ananda are added in samples/cxl_mem_tg/cxl_tg_test.h.

Signed-off-by: Lakshmiravikanth Pammi <lakshmiravikanth.pammi@intel.com>
Co-authored-by: Ananda Ravuri <33236856+anandaravuri@users.noreply.github.com>

samples/cxl_mem_tg/cxl_mem_tg.h

@@ -191,8 +191,8 @@ union tg_mem_size {
     enum { offset = MEM_SIZE };
     uint64_t value;
     struct {
-        uint64_t total_mem_size : 32;
         uint64_t hdm_mem_size : 32;
+        uint64_t total_mem_size : 32;
     };
 };
 

samples/cxl_mem_tg/cxl_tg_test.h

@@ -283,13 +283,13 @@ class cxl_tg_test : public test_command {
     tg_mem_size mem_size;
     mem_size.value = tg_exe_->read64(MEM_SIZE);
 
-    uint64_t value = mem_size.total_mem_size;
+    uint64_t value = mem_size.total_mem_size * MB / CL;
     tg_exe_->logger_->debug("Total hardware memory size:{}", value);
-    value = mem_size.hdm_mem_size;
+    value = mem_size.hdm_mem_size * MB / CL;
     tg_exe_->logger_->debug("HDM memory size:{0:d}", value);
 
     if (mem_size.hdm_mem_size != 0)
-        tg_exe_->hdm_size_ = mem_size.hdm_mem_size;
+        tg_exe_->hdm_size_ = (mem_size.total_mem_size - mem_size.hdm_mem_size) * MB / CL;
 
    cout << "HDM memory cache line size:" << dec << tg_exe_->hdm_size_ << endl;