1 files changed, 51 insertions, 0 deletions
diff --git a/tools/libxc/xc_tbuf.c b/tools/libxc/xc_tbuf.c
new file mode 100644
index 0000000000..b47cde2867
--- /dev/null
+++ b/tools/libxc/xc_tbuf.c
@@ -0,0 +1,51 @@
+/******************************************************************************
+ * xc_tbuf.c
+ * 
+ * API for manipulating and accessing trace buffer parameters
+ * 
+ * Copyright (c) 2005, Rob Gardner
+ */
+
+#include "xc_private.h"
+
+int xc_tbuf_enable(int xc_handle, int enable)
+{
+  dom0_op_t op;
+
+  op.cmd = DOM0_TBUFCONTROL;
+  op.interface_version = DOM0_INTERFACE_VERSION;
+  if (enable)
+    op.u.tbufcontrol.op  = DOM0_TBUF_ENABLE;
+  else
+    op.u.tbufcontrol.op  = DOM0_TBUF_DISABLE;
+  
+  return xc_dom0_op(xc_handle, &op);
+}
+
+int xc_tbuf_set_size(int xc_handle, uint32_t size)
+{
+  dom0_op_t op;
+
+  op.cmd = DOM0_TBUFCONTROL;
+  op.interface_version = DOM0_INTERFACE_VERSION;
+  op.u.tbufcontrol.op  = DOM0_TBUF_SET_SIZE;
+  op.u.tbufcontrol.size = size;
+  
+  return xc_dom0_op(xc_handle, &op);
+}
+  
+int xc_tbuf_get_size(int xc_handle, uint32_t *size)
+{
+  int rc;
+  dom0_op_t op;
+
+  op.cmd = DOM0_TBUFCONTROL;
+  op.interface_version = DOM0_INTERFACE_VERSION;
+  op.u.tbufcontrol.op  = DOM0_TBUF_GET_INFO;
+
+  rc = xc_dom0_op(xc_handle, &op);
+  if (rc == 0)
+    *size = op.u.tbufcontrol.size;
+  return rc;
+}
+