diff --git a/libopenfpga/libpcf/src/io/read_xml_io_location_map.cpp b/libopenfpga/libpcf/src/io/read_xml_io_location_map.cpp
new file mode 100644
index 000000000..a58e94493
--- /dev/null
+++ b/libopenfpga/libpcf/src/io/read_xml_io_location_map.cpp
@@ -0,0 +1,93 @@
+/********************************************************************
+ * This file includes the top-level function of this library
+ * which reads an XML of I/O location to the associated
+ * data structures
+ *******************************************************************/
+#include <string>
+
+/* Headers from pugi XML library */
+#include "pugixml.hpp"
+#include "pugixml_util.hpp"
+
+/* Headers from vtr util library */
+#include "vtr_assert.h"
+#include "vtr_time.h"
+
+/* Headers from libopenfpga util library */
+#include "openfpga_port_parser.h"
+
+/* Headers from libarchfpga */
+#include "arch_error.h"
+#include "read_xml_util.h"
+
+#include "read_xml_io_location_map.h"
+
+/* Begin namespace openfpga */
+namespace openfpga {
+
+/********************************************************************
+ * Parse XML codes of a <set_io> to an object of PinConstraint
+ *******************************************************************/
+static 
+void read_xml_one_io_location(pugi::xml_node& xml_io,
+                              const pugiutil::loc_data& loc_data,
+                              IoLocationMap& io_location_map) {
+  openfpga::PortParser port_parser(get_attribute(xml_io, "pad", loc_data).as_string());
+
+  int x_coord = get_attribute(xml_io, "x", loc_data).as_int();
+  int y_coord = get_attribute(xml_io, "y", loc_data).as_int();
+  int z_coord = get_attribute(xml_io, "z", loc_data).as_int();
+
+  /* Sanity checks */
+  if (x_coord < 0 || y_coord < 0 || z_coord < 0) {
+    archfpga_throw(loc_data.filename_c_str(), loc_data.line(xml_io),
+                   "Invalid coordinate (x, y, z) = (%d, %d, %d)! Expect zero or a positive integer!\n",
+                   x_coord, y_coord, z_coord);
+  }
+  if (port_parser.port().get_width() != 1) {
+    archfpga_throw(loc_data.filename_c_str(), loc_data.line(xml_io),
+                   "I/O (%s) does not have a port size of 1!\n",
+                   get_attribute(xml_io, "pad", loc_data).as_string());
+  }
+  io_location_map.set_io_index(size_t(x_coord), size_t(y_coord), size_t(z_coord), port_parser.port().get_name(), port_parser.port().get_lsb());
+}
+
+/********************************************************************
+ * Parse XML codes about <io_coordinates> to an object of PinConstraints
+ *******************************************************************/
+IoLocationMap read_xml_io_location_map(const char* fname) {
+
+  vtr::ScopedStartFinishTimer timer("Read I/O Location Map");
+
+  IoLocationMap io_location_map;
+
+  /* Parse the file */
+  pugi::xml_document doc;
+  pugiutil::loc_data loc_data;
+
+  try {
+    loc_data = pugiutil::load_xml(doc, fname);
+
+    pugi::xml_node xml_root = get_single_child(doc, "io_coordinates", loc_data);
+
+    size_t num_children = std::distance(xml_root.children().begin(), xml_root.children().end());
+    /* TODO: Reserve memory space for efficiency */
+
+    for (pugi::xml_node xml_io : xml_root.children()) {
+      /* Error out if the XML child has an invalid name! */
+      if (xml_io.name() != std::string("io")) {
+        bad_tag(xml_io, loc_data, xml_root, {"io"});
+      }
+      read_xml_one_io_location(xml_io, loc_data, io_location_map);
+    } 
+  } catch (pugiutil::XmlError& e) {
+    archfpga_throw(fname, e.line(),
+                   "%s", e.what());
+  }
+
+  return io_location_map; 
+}
+
+} /* End namespace openfpga*/
+
+
diff --git a/libopenfpga/libpcf/src/io/read_xml_io_location_map.h b/libopenfpga/libpcf/src/io/read_xml_io_location_map.h
new file mode 100644
index 000000000..5fed394d4
--- /dev/null
+++ b/libopenfpga/libpcf/src/io/read_xml_io_location_map.h
@@ -0,0 +1,20 @@
+#ifndef READ_XML_IO_LOCATION_MAP_H
+#define READ_XML_IO_LOCATION_MAP_H
+
+/********************************************************************
+ * Include header files that are required by function declaration
+ *******************************************************************/
+#include "io_location_map.h"
+
+/********************************************************************
+ * Function declaration
+ *******************************************************************/
+
+/* Begin namespace openfpga */
+namespace openfpga {
+
+IoLocationMap read_xml_io_location_map(const char* fname);
+
+} /* End namespace openfpga*/
+
+#endif