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- # SPDX-License-Identifier: GPL-2.0
- #
- # 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 $(quote),,$(CONFIG_EXTRA_FIRMWARE_DIR))
- fwabs := $(addprefix $(srctree)/,$(filter-out /%,$(fwdir)))$(filter /%,$(fwdir))
- fw-external-y := $(subst $(quote),,$(CONFIG_EXTRA_FIRMWARE))
- 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 4" >>$@;\
- 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 \
- firmware/Makefile)
- $(patsubst %,$(obj)/%.gen.S, $(fw-external-y)): %: $(wordsize_deps) \
- include/config/extra/firmware/dir.h
- $(call cmd,fwbin,$(fwabs)/$(patsubst $(obj)/%.gen.S,%,$@))
- # The .o files depend on the binaries directly; the .S files don't.
- $(patsubst %,$(obj)/%.gen.o, $(fw-external-y)): $(obj)/%.gen.o: $(fwdir)/%
- obj-y += $(patsubst %,%.gen.o, $(fw-external-y))
- ifeq ($(KBUILD_SRC),)
- # Makefile.build only creates subdirectories for O= builds, but external
- # firmware might live outside the kernel source tree
- _dummy := $(foreach d,$(addprefix $(obj)/,$(dir $(fw-external-y))), $(shell [ -d $(d) ] || mkdir -p $(d)))
- endif
- targets := $(patsubst $(obj)/%,%, \
- $(shell find $(obj) -name \*.gen.S 2>/dev/null))
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