Cherry-pick vboot_reference files from TOT to support crossystem

firmware/stub/utility_stub.c

-/* Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
+/* Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  *
  * Stub implementations of utility functions which call their linux-specific
  * equivalents.
  */
 
 #define _STUB_IMPLEMENTATION_
 #include "utility.h"
 
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <sys/time.h>
 
 void error(const char *format, ...) {
   va_list ap;
   va_start(ap, format);
   fprintf(stderr, "ERROR: ");
   vfprintf(stderr, format, ap);
   va_end(ap);
   exit(1);
 }
 
@@ skipping 18 matching lines @@
   free(ptr);
 }
 
 int Memcmp(const void* src1, const void* src2, size_t n) {
   return memcmp(src1, src2, n);
 }
 
 void* Memcpy(void* dest, const void* src, uint64_t n) {
   return memcpy(dest, src, (size_t)n);
 }
+
+uint64_t VbGetTimer(void) {
+  struct timeval tv;
+  gettimeofday(&tv, NULL);
+  return (uint64_t)tv.tv_sec * 1000000 + (uint64_t)tv.tv_usec;
+}
+
+uint64_t VbGetTimerMaxFreq(void) {
+  return UINT64_C(1000000);
+}