diff options
Diffstat (limited to 'firmware/Makefile')
| -rw-r--r-- | firmware/Makefile | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/firmware/Makefile b/firmware/Makefile new file mode 100644 index 000000000000..fa0808853883 --- /dev/null +++ b/firmware/Makefile @@ -0,0 +1,63 @@ +# +# 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 $${ASM_ALIGN}" >>$@;\ + echo "_fw_$${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 := $(wildcard include/config/64bit.h include/config/32bit.h \ + include/config/ppc32.h include/config/ppc64.h \ + include/config/superh32.h include/config/superh64.h \ + include/config/x86_32.h include/config/x86_64.h \ + firmware/Makefile) + +$(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)) +# Without this, built-in.o won't be created when it's empty, and the +# final vmlinux link will fail. +obj- := dummy |
