d172e7f5c6
This will control whether we build firmware into the kernel image for _every_ driver which we convert to request_firmware(), to avoid a proliferation of 'CONFIG_XXX_FIRMWARE' options for each one. Default to 'y' for now, which is the wrong thing to do but people seem to be insisting on it and refusing to even review patches until it's done. And it does preserve the existing behaviour for built-in drivers. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
94 lines
3.7 KiB
Makefile
94 lines
3.7 KiB
Makefile
#
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# kbuild file for firmware/
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#
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# Create $(fwabs) from $(CONFIG_EXTRA_FIRMWARE_DIR) -- if it doesn't have a
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# leading /, it's relative to $(srctree).
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fwdir := $(subst ",,$(CONFIG_EXTRA_FIRMWARE_DIR))
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fwabs := $(addprefix $(srctree)/,$(filter-out /%,$(fwdir)))$(filter /%,$(fwdir))
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fw-external-y := $(subst ",,$(CONFIG_EXTRA_FIRMWARE))
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# If CONFIG_FIRMWARE_IN_KERNEL is not set, then don't include any firmware
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ifneq ($(CONFIG_FIRMWARE_IN_KERNEL),y)
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fw-shipped-y :=
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endif
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firmware-y := $(fw-external-y) $(fw-shipped-y)
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firmware-dirs := $(sort $(patsubst %,$(objtree)/$(obj)/%/,$(dir $(firmware-y) $(fw-shipped-))))
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quiet_cmd_mkdir = MKDIR $(patsubst $(objtree)/%,%,$@)
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cmd_mkdir = mkdir -p $@
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quiet_cmd_ihex = IHEX $@
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cmd_ihex = $(OBJCOPY) -Iihex -Obinary $< $@
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quiet_cmd_fwbin = MK_FW $@
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cmd_fwbin = FWNAME="$(patsubst firmware/%.gen.S,%,$@)"; \
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FWSTR="$(subst /,_,$(subst .,_,$(subst -,_,$(patsubst \
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firmware/%.gen.S,%,$@))))"; \
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ASM_WORD=$(if $(CONFIG_64BIT),.quad,.long); \
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ASM_ALIGN=$(if $(CONFIG_64BIT),3,2); \
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PROGBITS=$(if $(CONFIG_ARM),%,@)progbits; \
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echo "/* Generated by firmware/Makefile */" > $@;\
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echo " .section .rodata" >>$@;\
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echo " .p2align $${ASM_ALIGN}" >>$@;\
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echo "_fw_$${FWSTR}_bin:" >>$@;\
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echo " .incbin \"$(2)\"" >>$@;\
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echo "_fw_end:" >>$@;\
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echo " .section .rodata.str,\"aMS\",$${PROGBITS},1" >>$@;\
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echo " .p2align $${ASM_ALIGN}" >>$@;\
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echo "_fw_$${FWSTR}_name:" >>$@;\
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echo " .string \"$$FWNAME\"" >>$@;\
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echo " .section .builtin_fw,\"a\",$${PROGBITS}" >>$@;\
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echo " .p2align $${ASM_ALIGN}" >>$@;\
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echo " $${ASM_WORD} _fw_$${FWSTR}_name" >>$@;\
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echo " $${ASM_WORD} _fw_$${FWSTR}_bin" >>$@;\
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echo " $${ASM_WORD} _fw_end - _fw_$${FWSTR}_bin" >>$@;
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# One of these files will change, or come into existence, whenever
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# the configuration changes between 32-bit and 64-bit. The .S files
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# need to change when that happens.
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wordsize_deps := $(wildcard include/config/64bit.h include/config/32bit.h \
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include/config/ppc32.h include/config/ppc64.h \
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include/config/superh32.h include/config/superh64.h \
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include/config/x86_32.h include/config/x86_64.h)
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# Workaround for make < 3.81, where .SECONDEXPANSION doesn't work.
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# It'll end up depending on these targets, so make them a PHONY rule which
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# depends on _all_ the directories in $(firmware-dirs), and it'll work out OK.
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PHONY += $(objtree)/$$(%) $(objtree)/$(obj)/$$(%)
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$(objtree)/$$(%) $(objtree)/$(obj)/$$(%): $(firmware-dirs)
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@true
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# For the $$(dir %) trick, where we need % to be expanded first.
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.SECONDEXPANSION:
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$(patsubst %,$(obj)/%.gen.S, $(fw-shipped-y)): %: $(wordsize_deps) \
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| $(objtree)/$$(dir %)
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$(call cmd,fwbin,$(patsubst %.gen.S,%,$@))
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$(patsubst %,$(obj)/%.gen.S, $(fw-external-y)): %: $(wordsize_deps) \
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include/config/builtin/firmware/dir.h | $(objtree)/$$(dir %)
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$(call cmd,fwbin,$(fwabs)/$(patsubst $(obj)/%.gen.S,%,$@))
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# The .o files depend on the binaries directly; the .S files don't.
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$(patsubst %,$(obj)/%.gen.o, $(fw-shipped-y)): %.gen.o: %
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$(patsubst %,$(obj)/%.gen.o, $(fw-external-y)): $(obj)/%.gen.o: $(fwdir)/%
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$(obj)/%: $(obj)/%.ihex | $(objtree)/$(obj)/$$(dir %)
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$(call cmd,ihex)
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$(firmware-dirs):
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$(call cmd,mkdir)
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obj-y := $(patsubst %,%.gen.o, $(firmware-y))
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# Remove .S files and binaries created from ihex
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# (during 'make clean' .config isn't included so they're all in $(fw-shipped-))
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targets := $(fw-shipped-) $(patsubst $(obj)/%,%, \
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$(shell find $(obj) -name \*.gen.S 2>/dev/null))
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# Without this, built-in.o won't be created when it's empty, and the
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# final vmlinux link will fail.
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obj-n := dummy
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