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firmware: refactor firmware/Makefile

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Clean up the Makefile. Equivalent *.gen.S files are still produced.

 - Use filechk to remove ugly wordsize_deps

 - Get FWNAME, FWSTR, ASM_WORD, ASM_ALIGN, and PROGBITS out of the
   recipe for readability

 - Remove 'mkdir' because filechk takes care of it

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This commit is contained in:
Masahiro Yamada 2018-12-21 12:12:41 +09:00
parent b239b4d65d
commit 3470d9eb63
1 changed files with 28 additions and 48 deletions
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76
firmware/Makefile
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@ -1,61 +1,41 @@
# SPDX-License-Identifier: GPL-2.0
#
# kbuild file for firmware/
#
# Create $(fwabs) from $(CONFIG_EXTRA_FIRMWARE_DIR) -- if it doesn't have a
# Create $(fwdir) 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))
fwdir := $(addprefix $(srctree)/,$(filter-out /%,$(fwdir)))$(filter /%,$(fwdir))
fw-external-y := $(subst $(quote),,$(CONFIG_EXTRA_FIRMWARE))
obj-y := $(addsuffix .gen.o, $(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" >>$@;
FWNAME = $(patsubst $(obj)/%.gen.S,%,$@)
FWSTR = $(subst /,_,$(subst .,_,$(subst -,_,$(FWNAME))))
ASM_WORD = $(if $(CONFIG_64BIT),.quad,.long)
ASM_ALIGN = $(if $(CONFIG_64BIT),3,2)
PROGBITS = $(if $(CONFIG_ARM),%,@)progbits
# 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)
filechk_fwbin = { \
echo "/* Generated by $(src)/Makefile */" ;\
echo " .section .rodata" ;\
echo " .p2align $(ASM_ALIGN)" ;\
echo "_fw_$(FWSTR)_bin:" ;\
echo " .incbin \"$(fwdir)/$(FWNAME)\"" ;\
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" ;\
}
$(patsubst %,$(obj)/%.gen.S, $(fw-external-y)): %: $(wordsize_deps) \
include/config/extra/firmware/dir.h
$(call cmd,fwbin,$(fwabs)/$(patsubst $(obj)/%.gen.S,%,$@))
$(obj)/%.gen.S: FORCE
$(call filechk,fwbin)
# 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
$(addprefix $(obj)/, $(obj-y)): $(obj)/%.gen.o: $(fwdir)/%
targets := $(patsubst $(obj)/%,%, \
$(shell find $(obj) -name \*.gen.S 2>/dev/null))