systemc: Import tests from the Accellera systemc distribution.

Change-Id: Iad76b398949a55d768a34d027a2d8e3739953da6
Reviewed-on: https://gem5-review.googlesource.com/10845
Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Maintainer: Gabe Black <gabeblack@google.com>

1 files changed, 85 insertions, 0 deletions

diff --git a/src/systemc/tests/tlm/nb2b_adapter/mm.h b/src/systemc/tests/tlm/nb2b_adapter/mm.h
new file mode 100644
index 000000000..c91dd3ed5
--- /dev/null
+++ b/src/systemc/tests/tlm/nb2b_adapter/mm.h
@@ -0,0 +1,85 @@
+
+// *******************************************************************
+// User-defined memory manager, which maintains a pool of transactions
+// *******************************************************************
+
+#include "tlm.h"
+
+class mm: public tlm::tlm_mm_interface
+{
+  typedef tlm::tlm_generic_payload gp_t;
+
+public:
+  mm() : free_list(0), empties(0) {}
+
+  virtual ~mm()
+  {
+    gp_t* ptr;
+
+    while (free_list)
+    {
+      ptr = free_list->trans;
+
+      // Delete generic payload and all extensions
+      sc_assert(ptr);
+      delete ptr;
+
+      free_list = free_list->next;
+    }
+
+    while (empties)
+    {
+      access* x = empties;
+      empties = empties->next;
+
+      // Delete free list access struct
+      delete x;
+    }
+  }
+
+  gp_t* allocate();
+  void  free(gp_t* trans);
+
+private:
+  struct access
+  {
+    gp_t* trans;
+    access* next;
+    access* prev;
+  };
+
+  access* free_list;
+  access* empties;
+};
+
+mm::gp_t* mm::allocate()
+{
+  gp_t* ptr;
+  if (free_list)
+  {
+    ptr = free_list->trans;
+    empties = free_list;
+    free_list = free_list->next;
+  }
+  else
+  {
+    ptr = new gp_t(this);
+  }
+  return ptr;
+}
+
+void mm::free(gp_t* trans)
+{
+  trans->reset(); // Delete auto extensions
+  if (!empties)
+  {
+    empties = new access;
+    empties->next = free_list;
+    empties->prev = 0;
+    if (free_list)
+      free_list->prev = empties;
+  }
+  free_list = empties;
+  free_list->trans = trans;
+  empties = free_list->prev;
+}