Add option to use mocked TPM driver

firmware/lib/mocked_rollback_index.c

Index: firmware/lib/mocked_rollback_index.c
diff --git a/firmware/lib/mocked_rollback_index.c b/firmware/lib/mocked_rollback_index.c
new file mode 100644
index 0000000000000000000000000000000000000000..3542e8486e3cbb18f36a15c27dba3292eafe2b23
--- /dev/null
+++ b/firmware/lib/mocked_rollback_index.c
@@ -0,0 +1,70 @@
+/* Copyright (c) 2010-2011 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.
+ *
+ * Functions for querying, manipulating and locking rollback indices
+ * stored in the TPM NVRAM.
+ */
+
+#include "rollback_index.h"
+
+#include "tss_constants.h"
+
+
+uint32_t TPMClearAndReenable(void) {
+  return TPM_SUCCESS;
+}
+
+
+uint32_t SetupTPM(int recovery_mode, int developer_mode,
+                  RollbackSpaceFirmware* rsf) {
+  return TPM_SUCCESS;
+}
+
+
+uint32_t RollbackS3Resume(void) {
+  return TPM_SUCCESS;
+}
+
+
+uint32_t RollbackFirmwareSetup(int developer_mode, uint32_t* version) {
+  *version = 0;
+  return TPM_SUCCESS;
+}
+
+
+uint32_t RollbackFirmwareRead(uint32_t* version) {
+  *version = 0;
+  return TPM_SUCCESS;
+}
+
+
+uint32_t RollbackFirmwareWrite(uint32_t version) {
+  return TPM_SUCCESS;
+}
+
+
+uint32_t RollbackFirmwareLock(void) {
+  return TPM_SUCCESS;
+}
+
+
+uint32_t RollbackKernelRecovery(int developer_mode) {
+  return TPM_SUCCESS;
+}
+
+
+uint32_t RollbackKernelRead(uint32_t* version) {
+  *version = 0;
+  return TPM_SUCCESS;
+}
+
+
+uint32_t RollbackKernelWrite(uint32_t version) {
+  return TPM_SUCCESS;
+}
+
+
+uint32_t RollbackKernelLock(void) {
+  return TPM_SUCCESS;
+}