| # 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)) |