mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-30 08:02:30 +00:00
df85b2d767
Commit5620a0d1aa("firmware: delete in-kernel firmware") removed the entire firmware directory. Unfortunately it thereby also removed the support for built-in firmware. This restores the ability to build firmware directly into the kernel by pruning the original Makefile to the necessary minimum. The default for EXTRA_FIRMWARE_DIR is now the standard directory /lib/firmware/. Fixes:5620a0d1aa("firmware: delete in-kernel firmware") Signed-off-by: Markus Trippelsdorf <markus@trippelsdorf.de> Acked-by: Greg K-H <gregkh@linuxfoundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
63 lines
2.7 KiB
Makefile
63 lines
2.7 KiB
Makefile
#
|
|
# 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
|