XEN_ROOT = $(CURDIR)/../..

# Base definitions and rules
include $(XEN_ROOT)/tools/vtpm/Rules.mk

# Dir name for emulator (as dom0 tpm driver)
TPM_EMULATOR_DIR = tpm_emulator
# Dir name for vtpm instance
VTPM_DIR = vtpm
ORIG_DIR = orig

# Emulator tarball name
TPM_EMULATOR_NAME = tpm_emulator-0.5.1
TPM_EMULATOR_TARFILE = $(TPM_EMULATOR_NAME).tar.gz

GMP_HEADER = /usr/include/gmp.h

.PHONY: all
all: build

.PHONY: build
build: build_sub

.PHONY: install
install: build
	$(MAKE) -C $(VTPM_DIR) $@

.PHONY: clean
clean:
	@if [ -d $(TPM_EMULATOR_DIR) ]; \
		then $(MAKE) -C $(TPM_EMULATOR_DIR) clean; \
	fi
	@if [ -d $(VTPM_DIR) ]; \
		then $(MAKE) -C $(VTPM_DIR) clean; \
	fi

.PHONY: mrproper
mrproper:
	rm -f $(TPM_EMULATOR_TARFILE) tpm_emulator.patch.old vtpm.patch.old
	rm -rf $(TPM_EMULATOR_DIR) $(VTPM_DIR) $(ORIG_DIR)

# Download Swiss emulator
$(TPM_EMULATOR_TARFILE):
	wget http://download.berlios.de/tpm-emulator/$(TPM_EMULATOR_TARFILE)

# Create vtpm dirs
$(VTPM_DIR)/tpmd/tpmd: $(TPM_EMULATOR_TARFILE) vtpm-0.5.1.patch
	rm -rf $(VTPM_DIR)
	tar -xzf $(TPM_EMULATOR_TARFILE)
	mv $(TPM_EMULATOR_NAME) $(VTPM_DIR)

	set -e; cd $(VTPM_DIR); \
	patch -p1 < ../vtpm-0.5.1.patch

orig: $(TPM_EMULATOR_TARFILE)
	mkdir $(ORIG_DIR);
	set -e; cd $(ORIG_DIR); \
	tar -xzf ../$(TPM_EMULATOR_TARFILE);

updatepatches: clean orig
	find $(VTPM_DIR) -name "*.orig" -print | xargs rm -f; 
	mv vtpm.patch vtpm.patch.old; 
	diff -uprN $(TPM_EMULATOR_DIR) $(VTPM_DIR) > vtpm.patch || true;

.PHONY: build_sub
build_sub: $(VTPM_DIR)/tpmd/tpmd
	set -e; if [ -e $(GMP_HEADER) ]; then \
		$(MAKE) -C $(VTPM_DIR); \
	else \
		echo "=== Unable to build VTPMs. libgmp could not be found."; \
	fi