Add option to use mocked TPM driver

firmware/Makefile

 # 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.
 
 FWTOP := $(shell pwd)
 LIBDIR = $(FWTOP)/lib
 STUBDIR = $(FWTOP)/stub
 TESTDIR = $(FWTOP)/linktest
 BUILD_ROOT := ${BUILD}/$(shell basename ${FWTOP})
 LIBS = $(FWLIB)  # Firmware library must be self-contained
@@ skipping 39 matching lines @@
 LIB_SRCS = \
         ./lib/cgptlib/cgptlib.c \
         ./lib/cgptlib/cgptlib_internal.c \
         ./lib/cgptlib/crc32.c \
         ./lib/cryptolib/padding.c \
         ./lib/cryptolib/rsa.c \
         ./lib/cryptolib/rsa_utility.c \
         ./lib/cryptolib/sha1.c \
         ./lib/cryptolib/sha2.c \
         ./lib/cryptolib/sha_utility.c \
-        ./lib/rollback_index.c \
-        ./lib/tpm_bootmode.c \
         ./lib/stateful_util.c \
-        ./lib/tpm_lite/tlcl.c \
         ./lib/utility.c \
         ./lib/vboot_common.c \
         ./lib/vboot_firmware.c \
         ./lib/vboot_kernel.c \
         ./lib/vboot_nvstorage.c
 
+ifeq ($(MOCK_TPM),)
+LIB_SRCS += \
+        ./lib/rollback_index.c \
+        ./lib/tpm_bootmode.c \
+        ./lib/tpm_lite/tlcl.c
+else
+LIB_SRCS += \
+        ./lib/mocked_rollback_index.c \
+        ./lib/mocked_tpm_bootmode.c \
+        ./lib/tpm_lite/mocked_tlcl.c
+endif
+
 LIB_OBJS = $(LIB_SRCS:%.c=${BUILD_ROOT}/%.o)
 
 STUB_SRCS = \
         ./stub/boot_device_stub.c \
         ./stub/load_firmware_stub.c \
         ./stub/tpm_lite_stub.c \
         ./stub/utility_stub.c
 
 STUB_OBJS = $(STUB_SRCS:%.c=${BUILD_ROOT}/%.o)
 
 ALL_SRCS = ${LIB_SRCS} ${STUB_SRCS}
 
 ifeq ($(FIRMWARE_ARCH),)
 test : $(STUB_OBJS) $(FWLIB)
         $(CC) $(CFLAGS) $(INCLUDES) -o $(BUILD_ROOT)/a.out \
                 $(TESTDIR)/main.c $(STUB_OBJS) $(LIBS)
 else
 test : $(FWLIB)
 endif
 
 include ../common.mk
 
 $(FWLIB) : $(LIB_OBJS)
         rm -f $@
         ar qc $@ $^