Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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).
7fwdir := $(subst $(quote),,$(CONFIG_EXTRA_FIRMWARE_DIR))
8fwabs := $(addprefix $(srctree)/,$(filter-out /%,$(fwdir)))$(filter /%,$(fwdir))
9
10fw-external-y := $(subst $(quote),,$(CONFIG_EXTRA_FIRMWARE))
11
12quiet_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.
38wordsize_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
51obj-y += $(patsubst %,%.gen.o, $(fw-external-y))
52
53ifeq ($(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)))
57endif
58
59targets := $(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.
63obj- := dummy