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 := $(subst $(quote),,$(CONFIG_EXTRA_FIRMWARE_DIR))
7fwdir := $(addprefix $(srctree)/,$(filter-out /%,$(fwdir)))$(filter /%,$(fwdir))
8
9firmware  := $(addsuffix .gen.o, $(subst $(quote),,$(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	echo "/* Generated by $(src)/Makefile */"		;\
20	echo "    .section .rodata"				;\
21	echo "    .p2align 4"					;\
22	echo "_fw_$(FWSTR)_bin:"				;\
23	echo "    .incbin \"$(fwdir)/$(FWNAME)\""		;\
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$(obj)/%.gen.S: FORCE
36	$(call filechk,fwbin)
37
38# The .o files depend on the binaries directly; the .S files don't.
39$(addprefix $(obj)/, $(firmware)): $(obj)/%.gen.o: $(fwdir)/%
40
41targets := $(patsubst $(obj)/%,%, \
42                                $(shell find $(obj) -name \*.gen.S 2>/dev/null))
43