| Markus Trippelsdorf | df85b2d | 2017-09-16 11:01:16 +0200 | [diff] [blame] | 1 | # |
| 2 | # kbuild file for firmware/ |
| 3 | # |
| 4 | |
| 5 | # Create $(fwabs) from $(CONFIG_EXTRA_FIRMWARE_DIR) -- if it doesn't have a |
| 6 | # leading /, it's relative to $(srctree). |
| 7 | fwdir := $(subst $(quote),,$(CONFIG_EXTRA_FIRMWARE_DIR)) |
| 8 | fwabs := $(addprefix $(srctree)/,$(filter-out /%,$(fwdir)))$(filter /%,$(fwdir)) |
| 9 | |
| 10 | fw-external-y := $(subst $(quote),,$(CONFIG_EXTRA_FIRMWARE)) |
| 11 | |
| 12 | quiet_cmd_fwbin = MK_FW $@ |
| 13 | cmd_fwbin = FWNAME="$(patsubst firmware/%.gen.S,%,$@)"; \ |
| 14 | FWSTR="$(subst /,_,$(subst .,_,$(subst -,_,$(patsubst \ |
| 15 | firmware/%.gen.S,%,$@))))"; \ |
| 16 | ASM_WORD=$(if $(CONFIG_64BIT),.quad,.long); \ |
| 17 | ASM_ALIGN=$(if $(CONFIG_64BIT),3,2); \ |
| 18 | PROGBITS=$(if $(CONFIG_ARM),%,@)progbits; \ |
| 19 | echo "/* Generated by firmware/Makefile */" > $@;\ |
| 20 | echo " .section .rodata" >>$@;\ |
| 21 | echo " .p2align $${ASM_ALIGN}" >>$@;\ |
| 22 | echo "_fw_$${FWSTR}_bin:" >>$@;\ |
| 23 | echo " .incbin \"$(2)\"" >>$@;\ |
| 24 | echo "_fw_end:" >>$@;\ |
| 25 | echo " .section .rodata.str,\"aMS\",$${PROGBITS},1" >>$@;\ |
| 26 | echo " .p2align $${ASM_ALIGN}" >>$@;\ |
| 27 | echo "_fw_$${FWSTR}_name:" >>$@;\ |
| 28 | echo " .string \"$$FWNAME\"" >>$@;\ |
| 29 | echo " .section .builtin_fw,\"a\",$${PROGBITS}" >>$@;\ |
| 30 | echo " .p2align $${ASM_ALIGN}" >>$@;\ |
| 31 | echo " $${ASM_WORD} _fw_$${FWSTR}_name" >>$@;\ |
| 32 | echo " $${ASM_WORD} _fw_$${FWSTR}_bin" >>$@;\ |
| 33 | echo " $${ASM_WORD} _fw_end - _fw_$${FWSTR}_bin" >>$@; |
| 34 | |
| 35 | # One of these files will change, or come into existence, whenever |
| 36 | # the configuration changes between 32-bit and 64-bit. The .S files |
| 37 | # need to change when that happens. |
| 38 | wordsize_deps := $(wildcard include/config/64bit.h include/config/32bit.h \ |
| 39 | include/config/ppc32.h include/config/ppc64.h \ |
| 40 | include/config/superh32.h include/config/superh64.h \ |
| 41 | include/config/x86_32.h include/config/x86_64.h \ |
| 42 | firmware/Makefile) |
| 43 | |
| 44 | $(patsubst %,$(obj)/%.gen.S, $(fw-external-y)): %: $(wordsize_deps) \ |
| 45 | include/config/extra/firmware/dir.h |
| 46 | $(call cmd,fwbin,$(fwabs)/$(patsubst $(obj)/%.gen.S,%,$@)) |
| 47 | |
| 48 | # The .o files depend on the binaries directly; the .S files don't. |
| 49 | $(patsubst %,$(obj)/%.gen.o, $(fw-external-y)): $(obj)/%.gen.o: $(fwdir)/% |
| 50 | |
| 51 | obj-y += $(patsubst %,%.gen.o, $(fw-external-y)) |
| 52 | |
| 53 | ifeq ($(KBUILD_SRC),) |
| 54 | # Makefile.build only creates subdirectories for O= builds, but external |
| 55 | # firmware might live outside the kernel source tree |
| 56 | _dummy := $(foreach d,$(addprefix $(obj)/,$(dir $(fw-external-y))), $(shell [ -d $(d) ] || mkdir -p $(d))) |
| 57 | endif |
| 58 | |
| 59 | targets := $(patsubst $(obj)/%,%, \ |
| 60 | $(shell find $(obj) -name \*.gen.S 2>/dev/null)) |
| 61 | # Without this, built-in.o won't be created when it's empty, and the |
| 62 | # final vmlinux link will fail. |
| 63 | obj- := dummy |