util/intelmetool: Add intelmetool from Damien Zammit

The intelmetool shows information about the Intel
Management Engine for different platforms.

Original source code can be found under following link:
https://github.com/zamaudio/intelmetool.git

Change-Id: I0eb17833a21eb04cf9245a7312289a4102bec1a9
Signed-off-by: Philipp Deppenwiese <zaolin@das-labor.org>
Reviewed-on: https://review.coreboot.org/14136
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>

util/intelmetool/mmap.c

@@ -0,0 +1,58 @@
+/* intelmetool
+ *
+ * Copyright (C) 2013-2015 Damien Zammit <damien@zamaudio.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include "mmap.h"
+#include <errno.h>
+
+#ifndef __DARWIN__
+int fd_mem;
+
+void *map_physical_exact(uint64_t phys_addr, uint64_t mapto, size_t len) {
+  void *virt_addr;
+  int err;
+
+  virt_addr = mmap((void*)mapto, len, PROT_WRITE | PROT_READ,
+                    MAP_SHARED | MAP_FIXED, fd_mem, (off_t) phys_addr);
+
+  if (virt_addr == MAP_FAILED) {
+    err = errno;
+    printf("Error mapping physical memory 0x%016" PRIx64 "[0x%zx] ERRNO=%d\n",
+            phys_addr, len, err);
+    return NULL;
+  }
+
+  return virt_addr;
+}
+
+void *map_physical(uint64_t phys_addr, size_t len) {
+  void *virt_addr;
+  int err;
+
+  virt_addr = mmap(NULL, len, PROT_WRITE | PROT_READ, MAP_SHARED, fd_mem, (off_t) phys_addr);
+
+  if (virt_addr == MAP_FAILED) {
+    err = errno;
+    printf("Error mapping physical memory 0x%016" PRIx64 "[0x%zx] ERRNO=%d\n",
+            phys_addr, len, err);
+    return NULL;
+  }
+
+  return virt_addr;
+}
+
+void unmap_physical(void *virt_addr, size_t len) {
+  munmap(virt_addr, len);
+}
+#endif