drivers/base/firmware_loader/builtin/Makefile

   1 # SPDX-License-Identifier: GPL-2.0
   2 obj-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).
   6 fwdir := $(CONFIG_EXTRA_FIRMWARE_DIR)
   7 fwdir := $(addprefix $(srctree)/,$(filter-out /%,$(fwdir)))$(filter /%,$(fwdir))
   8
   9 firmware  := $(addsuffix .gen.o, $(CONFIG_EXTRA_FIRMWARE))
  10 obj-y += $(firmware)
  11
  12 FWNAME    = $(patsubst $(obj)/%.gen.S,%,$@)
  13 FWSTR     = $(subst $(comma),_,$(subst /,_,$(subst .,_,$(subst -,_,$(FWNAME)))))
  14 ASM_WORD  = $(if $(CONFIG_64BIT),.quad,.long)
  15 ASM_ALIGN = $(if $(CONFIG_64BIT),3,2)
  16 PROGBITS  = $(if $(CONFIG_ARM),%,@)progbits
  17
  18 filechk_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
  41 targets := $(patsubst $(obj)/%,%, \
  42                                 $(shell find $(obj) -name \*.gen.S 2>/dev/null))