projects/linux·blob master · refs

46 lines · 1.7 KiB

1# SPDX-License-Identifier: GPL-2.0
2obj-y += main.o
3
4# Create $(fwdir) from $(CONFIG_EXTRA_FIRMWARE_DIR) -- if it doesn't have a
5# leading /, it's relative to $(srctree).
6fwdir := $(CONFIG_EXTRA_FIRMWARE_DIR)
7fwdir := $(addprefix $(srctree)/,$(filter-out /%,$(fwdir)))$(filter /%,$(fwdir))
8
9firmware := $(addsuffix .gen.o, $(CONFIG_EXTRA_FIRMWARE))
10obj-y += $(firmware)
11
12FWNAME = $(patsubst $(obj)/%.gen.S,%,$@)
13FWSTR = $(subst $(comma),_,$(subst /,_,$(subst .,_,$(subst -,_,$(FWNAME)))))
14ASM_WORD = $(if $(CONFIG_64BIT),.quad,.long)
15ASM_ALIGN = $(if $(CONFIG_64BIT),3,2)
16PROGBITS = $(if $(CONFIG_ARM),%,@)progbits
17
18filechk_fwbin = \
19 if [ ! -s "$(fwdir)/$(FWNAME)" ]; then \
20 echo "error: empty firmware: $(fwdir)/$(FWNAME)" >&2 ;\
21 exit 1 ;\
22 fi ;\
23 echo "/* Generated by $(src)/Makefile */" ;\
24 echo " .section .rodata" ;\
25 echo " .p2align 4" ;\
26 echo "_fw_$(FWSTR)_bin:" ;\
27 echo " .incbin \"$(fwdir)/$(FWNAME)\"" ;\
28 echo "_fw_end:" ;\
29 echo " .section .rodata.str,\"aMS\",$(PROGBITS),1" ;\
30 echo " .p2align $(ASM_ALIGN)" ;\
31 echo "_fw_$(FWSTR)_name:" ;\
32 echo " .string \"$(FWNAME)\"" ;\
33 echo " .section .builtin_fw,\"a\",$(PROGBITS)" ;\
34 echo " .p2align $(ASM_ALIGN)" ;\
35 echo " $(ASM_WORD) _fw_$(FWSTR)_name" ;\
36 echo " $(ASM_WORD) _fw_$(FWSTR)_bin" ;\
37 echo " $(ASM_WORD) _fw_end - _fw_$(FWSTR)_bin"
38
39$(obj)/%.gen.S: FORCE
40 $(call filechk,fwbin)
41
42# The .o files depend on the binaries directly; the .S files don't.
43$(addprefix $(obj)/, $(firmware)): $(obj)/%.gen.o: $(fwdir)/%
44
45targets := $(patsubst $(obj)/%,%, \
46 $(shell find $(obj) -name \*.gen.S 2>/dev/null))