EMPTY_PMU_EVENTS_C = pmu-events/empty-pmu-events.c
# pmu-events.c will be generated by jevents.py or copied from EMPTY_PMU_EVENTS_C
PMU_EVENTS_C	=  $(OUTPUT)pmu-events/pmu-events.c
PMU_EVENTS_STRING_C = $(OUTPUT)pmu-events/pmu-events-string.c

pmu-events-y	+= pmu-events.o
ifneq ($(NO_JEVENTS),1)
pmu-events-y	+= pmu-events-string.o
endif

# pmu-events.c file is generated in the OUTPUT directory so it needs a
# separate rule to depend on it properly
$(OUTPUT)pmu-events/pmu-events.o: $(PMU_EVENTS_C)
	$(call rule_mkdir)
	$(call if_changed_dep,cc_o_c)

$(OUTPUT)pmu-events/pmu-events-string.o: $(PMU_EVENTS_STRING_C)
	$(call rule_mkdir)
	$(call if_changed_dep,cc_o_c)

# Message for $(call echo-cmd,cp), possibly remove the src file from
# the destination to save space in the build log.
quiet_cmd_cp   = COPY    $(patsubst %$<,%,$@) <- $<

# --- NO_JEVENTS=1 build ---
ifeq ($(NO_JEVENTS),1)
$(PMU_EVENTS_C): $(EMPTY_PMU_EVENTS_C)
	$(call rule_mkdir)
	$(Q)$(call echo-cmd,cp)cp $< $@
else
# --- Regular build ---

# Setup the JEVENTS_ARCH and JEVENTS_MODEL
ifeq ($(JEVENTS_ARCH),)
JEVENTS_ARCH=$(SRCARCH)
endif
JEVENTS_MODEL ?= all

# The input json/csv files
SRC_DIR		:= pmu-events/arch
ifeq ($(JEVENTS_ARCH),all)
SRC_JSON	:= $(shell find $(SRC_DIR) -name '*.json' -o -name '*.csv')
else
SRC_JSON	:= $(shell find $(SRC_DIR)/common $(SRC_DIR)/test $(SRC_DIR)/$(JEVENTS_ARCH) -name '*.json' -o -name '*.csv')
endif

# Python to build the generic legacy cache events
LEGACY_CACHE_PY	=  pmu-events/make_legacy_cache.py
LEGACY_CACHE_JSON = $(OUTPUT)pmu-events/arch/common/common/legacy-cache.json
GEN_JSON = $(LEGACY_CACHE_JSON)

$(LEGACY_CACHE_JSON): $(LEGACY_CACHE_PY)
	$(call rule_mkdir)
	$(Q)$(call echo-cmd,gen)$(PYTHON) $(LEGACY_CACHE_PY) > $@

# Python to generate architectural metrics
GEN_METRIC_DEPS := pmu-events/metric.py pmu-events/common_metrics.py
# Functions to extract the model from an extra-metrics.json or extra-metricgroups.json path.
model_name = $(notdir $(patsubst %/,%,$(dir $(1))))
vendor_name = $(notdir $(patsubst %/,%,$(dir $(patsubst %/,%,$(dir $(1))))))

ifeq ($(JEVENTS_ARCH),$(filter $(JEVENTS_ARCH),x86 all))
# Generate AMD Json
ZENS := $(shell ls -d pmu-events/arch/x86/amdzen*)
ZEN_METRICS = $(foreach x,$(ZENS),$(OUTPUT)$(x)/extra-metrics.json)
ZEN_METRICGROUPS = $(foreach x,$(ZENS),$(OUTPUT)$(x)/extra-metricgroups.json)
GEN_JSON += $(ZEN_METRICS) $(ZEN_METRICGROUPS)

$(ZEN_METRICS): pmu-events/amd_metrics.py $(GEN_METRIC_DEPS)
	$(call rule_mkdir)
	$(Q)$(call echo-cmd,gen)$(PYTHON) $< $(call model_name,$@) pmu-events/arch > $@

$(ZEN_METRICGROUPS): pmu-events/amd_metrics.py $(GEN_METRIC_DEPS)
	$(call rule_mkdir)
	$(Q)$(call echo-cmd,gen)$(PYTHON) $< -metricgroups $(call model_name,$@) pmu-events/arch > $@

endif

ifeq ($(JEVENTS_ARCH),$(filter $(JEVENTS_ARCH),arm64 all))
# Generate ARM Json
ARMS := $(shell ls -d pmu-events/arch/arm64/arm/*|grep -v cmn)
ARM_METRICS = $(foreach x,$(ARMS),$(OUTPUT)$(x)/extra-metrics.json)
ARM_METRICGROUPS = $(foreach x,$(ARMS),$(OUTPUT)$(x)/extra-metricgroups.json)
GEN_JSON += $(ARM_METRICS) $(ARM_METRICGROUPS)

$(ARM_METRICS): pmu-events/arm64_metrics.py $(GEN_METRIC_DEPS)
	$(call rule_mkdir)
	$(Q)$(call echo-cmd,gen)$(PYTHON) $< $(call vendor_name,$@) $(call model_name,$@) pmu-events/arch > $@

$(ARM_METRICGROUPS): pmu-events/arm64_metrics.py $(GEN_METRIC_DEPS)
	$(call rule_mkdir)
	$(Q)$(call echo-cmd,gen)$(PYTHON) $< -metricgroups $(call vendor_name,$@) $(call model_name,$@) pmu-events/arch > $@

endif

ifeq ($(JEVENTS_ARCH),$(filter $(JEVENTS_ARCH),x86 all))
# Generate Intel Json
INTELS := $(shell ls -d pmu-events/arch/x86/*|grep -v amdzen|grep -v mapfile.csv)
INTEL_METRICS = $(foreach x,$(INTELS),$(OUTPUT)$(x)/extra-metrics.json)
INTEL_METRICGROUPS = $(foreach x,$(INTELS),$(OUTPUT)$(x)/extra-metricgroups.json)
GEN_JSON += $(INTEL_METRICS) $(INTEL_METRICGROUPS)

$(INTEL_METRICS): pmu-events/intel_metrics.py $(GEN_METRIC_DEPS)
	$(call rule_mkdir)
	$(Q)$(call echo-cmd,gen)$(PYTHON) $< $(call model_name,$@) pmu-events/arch > $@

$(INTEL_METRICGROUPS): pmu-events/intel_metrics.py $(GEN_METRIC_DEPS)
	$(call rule_mkdir)
	$(Q)$(call echo-cmd,gen)$(PYTHON) $< -metricgroups $(call model_name,$@) pmu-events/arch > $@

endif

OUT_DIR		:= $(OUTPUT)pmu-events/arch

ifeq ($(OUTPUT),)
OUT_JSON	:= $(SRC_JSON)
ORPHAN_FILES	:=
else
# Things that need to be built in the OUTPUT directory. Note, ensure
# there is a slash after the directory name so that it matches what
# $(dir) gives in COPY_RULE.
OUT_JSON	:= $(patsubst $(SRC_DIR)/%,$(OUT_DIR)/%,$(SRC_JSON))
OUT_DIRS	:= $(sort $(patsubst %/,%,$(dir $(OUT_JSON))))

# Things already in the OUTPUT directory
CUR_OUT_JSON	:= $(shell [ -d $(OUT_DIR) ] && find $(OUT_DIR) -type f)

# Things in the OUTPUT directory but shouldn't be there as computed by
# OUT_JSON and GEN_JSON.

ORPHAN_FILES	:= $(filter-out $(OUT_JSON) $(GEN_JSON),$(CUR_OUT_JSON))

# Message for $(call echo-cmd,mkd). There is already a mkdir message
# but it assumes $@ is a file to mkdir the directory for.
quiet_cmd_mkd  = MKDIR   $@

$(OUT_DIRS):
	$(Q)$(call echo-cmd,mkd)mkdir -p $@

# Explicitly generate rules to copy SRC_JSON files as $(dir) cannot
# apply to $@ in a dependency. Exclude from the copy rules any that
# look like they are copying generated json. This happens as a perf
# build within the tools/perf directory will leave generated json
# files within the tree, these then get picked up by SRC_JSON find.
define COPY_RULE
$(2): $(1) | $(3)
	$$(Q)$$(call echo-cmd,cp)cp $(1) $(2)
endef
$(foreach src,$(SRC_JSON), \
    $(eval dest := $(patsubst $(SRC_DIR)/%,$(OUT_DIR)/%,$(src))) \
    $(eval ddir := $(patsubst %/,%,$(dir $(dest)))) \
    $(if $(filter $(dest),$(GEN_JSON)),, \
        $(eval $(call COPY_RULE,$(src),$(dest),$(ddir))) \
    ) \
)

endif # ifneq ($(OUTPUT),)

JEVENTS_PY	=  pmu-events/jevents.py
METRIC_PY	=  pmu-events/metric.py

# Rule to run the metric test.
METRIC_TEST_PY	=  pmu-events/metric_test.py
METRIC_TEST_LOG	=  $(OUTPUT)pmu-events/metric_test.log

$(METRIC_TEST_LOG): $(METRIC_TEST_PY) $(METRIC_PY)
	$(call rule_mkdir)
	$(Q)$(call echo-cmd,test)$(PYTHON) $< 2> $@ || (cat $@ && false)

# Rule to create then ensure the empty-pmu-events.c is in sync.
TEST_EMPTY_PMU_EVENTS_C = $(OUTPUT)pmu-events/test-empty-pmu-events.c
EMPTY_PMU_EVENTS_TEST_LOG = $(OUTPUT)pmu-events/empty-pmu-events.log

$(TEST_EMPTY_PMU_EVENTS_C): $(OUT_JSON) $(GEN_JSON) $(JEVENTS_PY) $(METRIC_PY)
	$(call rule_mkdir)
	$(Q)$(call echo-cmd,gen)$(PYTHON) $(JEVENTS_PY) none none $(OUTPUT)pmu-events/arch $@

$(EMPTY_PMU_EVENTS_TEST_LOG): $(EMPTY_PMU_EVENTS_C) $(TEST_EMPTY_PMU_EVENTS_C)
	$(call rule_mkdir)
	$(Q)$(call echo-cmd,test)diff -u $^ 2> $@ || (cat $@ && false)


# Dependencies for jevents.py
JEVENTS_DEPS := $(OUT_JSON) $(GEN_JSON) $(JEVENTS_PY) $(METRIC_PY) $(EMPTY_PMU_EVENTS_TEST_LOG) $(METRIC_TEST_LOG)

# Rules to run mypy if enabled.
ifdef MYPY
define MYPY_RULE
$(2): $(1)
	$$(Q)$$(call echo-cmd,test)mypy $(1) > $(2) || (cat $(2) && rm $(2) && false)
endef
$(foreach src,$(wildcard pmu-events/*.py), \
    $(eval dest := $(patsubst pmu-events/%,$(OUTPUT)pmu-events/%.mypy_log,$(src))) \
    $(eval $(call MYPY_RULE,$(src),$(dest))) \
)

MYPY_INPUTS := $(wildcard pmu-events/*.py)
MYPY_OUTPUTS := $(patsubst pmu-events/%,$(OUTPUT)pmu-events/%.mypy_log,$(MYPY_INPUTS))
JEVENTS_DEPS += $(MYPY_OUTPUTS)
endif

# Rules to run pylint if enabled.
ifdef PYLINT
define PYLINT_RULE
$(2): $(1)
	$$(Q)$$(call echo-cmd,test)pylint $(1) > $(2) || (cat $(2) && rm $(2) && false)
endef
$(foreach src,$(wildcard pmu-events/*.py), \
    $(eval dest := $(patsubst pmu-events/%,$(OUTPUT)pmu-events/%.pylint_log,$(src))) \
    $(eval $(call PYLINT_RULE,$(src),$(dest))) \
)

PYLINT_INPUTS := $(wildcard pmu-events/*.py)
PYLINT_OUTPUTS := $(patsubst pmu-events/%,$(OUTPUT)pmu-events/%.pylint_log,$(PYLINT_INPUTS))
JEVENTS_DEPS += $(PYLINT_OUTPUTS)
endif

# If there are orphaned files remove them.
ifneq ($(strip $(ORPHAN_FILES)),)
.PHONY: prune_orphans

# Message for $(call echo-cmd,rm). Generally cleaning files isn't part
# of a build step.
quiet_cmd_rm = RM      ...$(words $^) orphan file(s)...

# The list of files can be long. Use xargs to prevent issues.
prune_orphans: $(ORPHAN_FILES)
	$(Q)$(call echo-cmd,rm)echo "$^" | xargs rm -f

JEVENTS_DEPS += prune_orphans
endif

# Finally, the rule to build pmu-events.c using jevents.py. All test
# and inputs are dependencies.
$(PMU_EVENTS_C): $(JEVENTS_DEPS)
	$(call rule_mkdir)
	$(Q)$(call echo-cmd,gen)$(PYTHON) $(JEVENTS_PY) $(JEVENTS_ARCH) $(JEVENTS_MODEL) \
            $(OUT_DIR) $(PMU_EVENTS_C) $(PMU_EVENTS_STRING_C)

$(PMU_EVENTS_STRING_C): $(PMU_EVENTS_C)
	@:

endif # ifeq ($(NO_JEVENTS),1)