Add LoadFirmware() support for NvStorage API

firmware/stub/load_firmware_stub.c

 /* Copyright (c) 2010 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.
  *
  * TEMPORARY stub for calling LoadFirmware() which looks like the old
  * VerifyFirmwareDriver_f() call.
  * (Firmware portion)
  */
 
 #include "load_firmware_fw.h"
@@ skipping 55 matching lines @@
 int VerifyFirmwareDriver_stub(uint8_t* root_key_blob,
                               uint8_t* verification_headerA,
                               uint8_t* firmwareA,
                               uint8_t* verification_headerB,
                               uint8_t* firmwareB) {
 
   int rv;
 
   CallerInternal ci;
   LoadFirmwareParams p;
+  VbNvContext vnc;
+
+  /* TODO: YOU SHOULD CALL LoadFirmwareSetup() AS SOON AS THE TPM
+   * INTERFACE IS AVAILABLE */
+  LoadFirmwareSetup();
 
   /* Copy the firmware volume pointers to our global variables. */
   ci.firmwareA = firmwareA;
   ci.firmwareB = firmwareB;
 
   /* TODO: YOU NEED TO PASS IN THE FIRMWARE VOLUME SIZES SOMEHOW */
   ci.firmwareA_size = 0;
   ci.firmwareB_size = 0;
 
+  /* TODO: YOU NEED TO LOAD vnc.raw[] FROM NON-VOLATILE STORAGE */
+
   /* Set up the params for LoadFirmware() */
   p.caller_internal = &ci;
   p.firmware_root_key_blob = root_key_blob;
   p.verification_block_0 = verification_headerA;
   p.verification_block_1 = verification_headerB;
+  p.nv_context = &vnc;
 
   /* Allocate a key blob buffer */
   p.kernel_sign_key_blob = Malloc(LOAD_FIRMWARE_KEY_BLOB_REC_SIZE);
   p.kernel_sign_key_size = LOAD_FIRMWARE_KEY_BLOB_REC_SIZE;
 
   /* TODO: YOU NEED TO SET THE BOOT FLAGS SOMEHOW */
   p.boot_flags = 0;
 
   /* Call LoadFirmware() */
   rv = LoadFirmware(&p);
+
+  if (vnc.raw_changed) {
+    /* TODO: YOU NEED TO SAVE vnc.raw TO NON-VOLATILE STORAGE */
+  }
+
   if (LOAD_FIRMWARE_SUCCESS == rv) {
     /* TODO: YOU NEED TO KEEP TRACK OF p.kernel_sign_key_blob AND
      * p.kernel_sign_key_size SO YOU CAN PASS THEM TO LoadKernel(). */
 
     return (0 == p.firmware_index ? BOOT_FIRMWARE_A_CONTINUE :
             BOOT_FIRMWARE_B_CONTINUE);
 
   } else {
     /* Error */
     return BOOT_FIRMWARE_RECOVERY_CONTINUE;
   }
 }