firmware/Makefile

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