| # |
| # 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)) |
| |
| # There are three cases to care about: |
| # 1. Building kernel with CONFIG_FIRMWARE_IN_KERNEL=y -- $(fw-shipped-y) should |
| # include the firmware files to include, according to .config |
| # 2. 'make modules_install', which will install firmware for modules, and |
| # _also_ for the in-kernel drivers when CONFIG_FIRMWARE_IN_KERNEL=n |
| # 3. 'make firmware_install', which installs all firmware, unconditionally. |
| |
| # For the former two cases we want $(fw-shipped-y) and $(fw-shipped-m) to be |
| # accurate. In the latter case it doesn't matter -- it'll use $(fw-shipped-all). |
| # But be aware that the config file might not be included at all. |
| |
| |
| fw-shipped-all := $(fw-shipped-y) $(fw-shipped-m) $(fw-shipped-) |
| |
| # Directories which we _might_ need to create, so we have a rule for them. |
| firmware-dirs := $(sort $(patsubst %,$(objtree)/$(obj)/%/,$(dir $(fw-external-y) $(fw-shipped-all)))) |
| |
| quiet_cmd_mkdir = MKDIR $(patsubst $(objtree)/%,%,$@) |
| cmd_mkdir = mkdir -p $@ |
| |
| quiet_cmd_ihex = IHEX $@ |
| cmd_ihex = $(OBJCOPY) -Iihex -Obinary $< $@ |
| |
| quiet_cmd_ihex2fw = IHEX2FW $@ |
| cmd_ihex2fw = $(objtree)/$(obj)/ihex2fw $< $@ |
| |
| 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)/$$(dir %) |
| $(call cmd,fwbin,$(fwabs)/$(patsubst $(obj)/%.gen.S,%,$@)) |
| |
| # The .o files depend on the binaries directly; the .S files don't. |
| $(patsubst %,$(obj)/%.gen.o, $(fw-shipped-y)): %.gen.o: % |
| $(patsubst %,$(obj)/%.gen.o, $(fw-external-y)): $(obj)/%.gen.o: $(fwdir)/% |
| |
| # .ihex is used just as a simple way to hold binary files in a source tree |
| # where binaries are frowned upon. They are directly converted with objcopy. |
| $(obj)/%: $(obj)/%.ihex | $(objtree)/$(obj)/$$(dir %) |
| $(call cmd,ihex) |
| |
| # .HEX is also Intel HEX, but where the offset and length in each record |
| # is actually meaningful, because the firmware has to be loaded in a certain |
| # order rather than as a single binary blob. Thus, we convert them into our |
| # more compact binary representation of ihex records (<linux/ihex.h>) |
| $(obj)/%.fw: $(obj)/%.HEX $(obj)/ihex2fw | $(objtree)/$(obj)/$$(dir %) |
| $(call cmd,ihex2fw) |
| |
| $(firmware-dirs): |
| $(call cmd,mkdir) |
| |
| obj-y += $(patsubst %,%.gen.o, $(fw-external-y)) |
| obj-$(CONFIG_FIRMWARE_IN_KERNEL) += $(patsubst %,%.gen.o, $(fw-shipped-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 |
| |
| hostprogs-y := ihex2fw |