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- #
- # kbuild file for firmware/
- #
- # Create $(fwabs) from $(CONFIG_EXTRA_FIRMWARE_DIR) -- if it doesn't have a
- # leading /, it's relative to $(srctree).
- fwdir := $(subst ",,$(CONFIG_EXTRA_FIRMWARE_DIR))
- fwabs := $(addprefix $(srctree)/,$(filter-out /%,$(fwdir)))$(filter /%,$(fwdir))
- fw-external-y := $(subst ",,$(CONFIG_EXTRA_FIRMWARE))
- # If CONFIG_FIRMWARE_IN_KERNEL is not set, then don't include any firmware
- ifneq ($(CONFIG_FIRMWARE_IN_KERNEL),y)
- fw-shipped-y :=
- endif
- firmware-y := $(fw-external-y) $(fw-shipped-y)
- firmware-dirs := $(sort $(patsubst %,$(objtree)/$(obj)/%/,$(dir $(firmware-y) $(fw-shipped-))))
- quiet_cmd_mkdir = MKDIR $(patsubst $(objtree)/%,%,$@)
- cmd_mkdir = mkdir -p $@
- quiet_cmd_ihex = IHEX $@
- cmd_ihex = $(OBJCOPY) -Iihex -Obinary $< $@
- quiet_cmd_fwbin = MK_FW $@
- cmd_fwbin = FWNAME="$(patsubst firmware/%.gen.S,%,$@)"; \
- FWSTR="$(subst /,_,$(subst .,_,$(subst -,_,$(patsubst \
- firmware/%.gen.S,%,$@))))"; \
- ASM_WORD=$(if $(CONFIG_64BIT),.quad,.long); \
- ASM_ALIGN=$(if $(CONFIG_64BIT),3,2); \
- PROGBITS=$(if $(CONFIG_ARM),%,@)progbits; \
- echo "/* Generated by firmware/Makefile */" > $@;\
- echo " .section .rodata" >>$@;\
- echo " .p2align $${ASM_ALIGN}" >>$@;\
- echo "_fw_$${FWSTR}_bin:" >>$@;\
- echo " .incbin \"$(2)\"" >>$@;\
- echo "_fw_end:" >>$@;\
- echo " .section .rodata.str,\"aMS\",$${PROGBITS},1" >>$@;\
- echo " .p2align $${ASM_ALIGN}" >>$@;\
- echo "_fw_$${FWSTR}_name:" >>$@;\
- echo " .string \"$$FWNAME\"" >>$@;\
- echo " .section .builtin_fw,\"a\",$${PROGBITS}" >>$@;\
- echo " .p2align $${ASM_ALIGN}" >>$@;\
- echo " $${ASM_WORD} _fw_$${FWSTR}_name" >>$@;\
- echo " $${ASM_WORD} _fw_$${FWSTR}_bin" >>$@;\
- echo " $${ASM_WORD} _fw_end - _fw_$${FWSTR}_bin" >>$@;
- # One of these files will change, or come into existence, whenever
- # the configuration changes between 32-bit and 64-bit. The .S files
- # need to change when that happens.
- wordsize_deps := $(wildcard include/config/64bit.h include/config/32bit.h \
- include/config/ppc32.h include/config/ppc64.h \
- include/config/superh32.h include/config/superh64.h \
- include/config/x86_32.h include/config/x86_64.h)
- # Workaround for make < 3.81, where .SECONDEXPANSION doesn't work.
- # It'll end up depending on these targets, so make them a PHONY rule which
- # depends on _all_ the directories in $(firmware-dirs), and it'll work out OK.
- PHONY += $(objtree)/$$(%) $(objtree)/$(obj)/$$(%)
- $(objtree)/$$(%) $(objtree)/$(obj)/$$(%): $(firmware-dirs)
- @true
- # For the $$(dir %) trick, where we need % to be expanded first.
- .SECONDEXPANSION:
- $(patsubst %,$(obj)/%.gen.S, $(fw-shipped-y)): %: $(wordsize_deps) \
- | $(objtree)/$$(dir %)
- $(call cmd,fwbin,$(patsubst %.gen.S,%,$@))
- $(patsubst %,$(obj)/%.gen.S, $(fw-external-y)): %: $(wordsize_deps) \
- include/config/builtin/firmware/dir.h | $(objtree)/$$(dir %)
- $(call cmd,fwbin,$(fwabs)/$(patsubst $(obj)/%.gen.S,%,$@))
- # The .o files depend on the binaries directly; the .S files don't.
- $(patsubst %,$(obj)/%.gen.o, $(fw-shipped-y)): %.gen.o: %
- $(patsubst %,$(obj)/%.gen.o, $(fw-external-y)): $(obj)/%.gen.o: $(fwdir)/%
- $(obj)/%: $(obj)/%.ihex | $(objtree)/$(obj)/$$(dir %)
- $(call cmd,ihex)
- $(firmware-dirs):
- $(call cmd,mkdir)
- obj-y := $(patsubst %,%.gen.o, $(firmware-y))
- # Remove .S files and binaries created from ihex
- # (during 'make clean' .config isn't included so they're all in $(fw-shipped-))
- targets := $(fw-shipped-) $(patsubst $(obj)/%,%, \
- $(shell find $(obj) -name \*.gen.S 2>/dev/null))
- # Without this, built-in.o won't be created when it's empty, and the
- # final vmlinux link will fail.
- obj-n := dummy
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