Add NV storage fields for firmware flags

firmware/include/vboot_nvstorage.h

 /* 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.
  */
 
 /* Non-volatile storage routines for verified boot.
  */
 
 #ifndef VBOOT_REFERENCE_NVSTORAGE_H_
 #define VBOOT_REFERENCE_NVSTORAGE_H_
@@ skipping 29 matching lines @@
    * Valid range: 0-15. */
   VBNV_TRY_B_COUNT,
   /* Request recovery mode on next boot; see VBNB_RECOVERY_* below for
    * currently defined reason codes.  8-bit value. */
   VBNV_RECOVERY_REQUEST,
   /* Localization index for screen bitmaps displayed by firmware.
    * 8-bit value. */
   VBNV_LOCALIZATION_INDEX,
   /* Field reserved for kernel/user-mode use; 32-bit value. */
   VBNV_KERNEL_FIELD,
+  /* Firmware checked RW slot B before slot A on the current boot because
+   * VBNV_TRY_B_COUNT was non-zero at that time.  0=no; 1=yes. */
+  VBNV_FW_USED_TRY_B,
+  /* Firmware verified the kernel key block signature using the key stored
+   * in the firmware.  0=no, just used the key block hash; 1=yes, used the
+   * key block signature. */
+  VBNV_FW_VERIFIED_KERNEL_KEY,
 } VbNvParam;
 
 
 /* Recovery reason codes for VBNV_RECOVERY_REQUEST */
 /* Recovery not requested. */
 #define VBNV_RECOVERY_NOT_REQUESTED   0x00
 /* Recovery requested from legacy utility.  (Prior to the NV storage
  * spec, recovery mode was a single bitfield; this value is reserved
  * so that scripts which wrote 1 to the recovery field are
  * distinguishable from scripts whch use the recovery reasons listed
@@ skipping 68 matching lines @@
 int VbNvGet(VbNvContext* context, VbNvParam param, uint32_t* dest);
 
 /* Set a NV storage param to a new value.  Returns 0 if success,
  * non-zero if error.
  *
  * This may only be called between VbNvSetup() and VbNvTeardown(). */
 int VbNvSet(VbNvContext* context, VbNvParam param, uint32_t value);
 
 
 #endif  /* VBOOT_REFERENCE_NVSTORAGE_H_ */