firmware: Add CONFIG_FIRMWARE_IN_KERNEL option.
[linux-2.6.git] / firmware / Makefile
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).
7 fwdir := $(subst ",,$(CONFIG_EXTRA_FIRMWARE_DIR))
8 fwabs := $(addprefix $(srctree)/,$(filter-out /%,$(fwdir)))$(filter /%,$(fwdir))
9
10 fw-external-y := $(subst ",,$(CONFIG_EXTRA_FIRMWARE))
11
12 # If CONFIG_FIRMWARE_IN_KERNEL is not set, then don't include any firmware
13 ifneq ($(CONFIG_FIRMWARE_IN_KERNEL),y)
14 fw-shipped-y :=
15 endif
16
17 firmware-y    := $(fw-external-y) $(fw-shipped-y)
18 firmware-dirs := $(sort $(patsubst %,$(objtree)/$(obj)/%/,$(dir $(firmware-y) $(fw-shipped-))))
19
20 quiet_cmd_mkdir = MKDIR   $(patsubst $(objtree)/%,%,$@)
21       cmd_mkdir = mkdir -p $@
22
23 quiet_cmd_ihex  = IHEX    $@
24       cmd_ihex  = $(OBJCOPY) -Iihex -Obinary $< $@
25
26 quiet_cmd_fwbin = MK_FW   $@
27       cmd_fwbin = FWNAME="$(patsubst firmware/%.gen.S,%,$@)";                \
28                   FWSTR="$(subst /,_,$(subst .,_,$(subst -,_,$(patsubst      \
29                                 firmware/%.gen.S,%,$@))))";                  \
30                   ASM_WORD=$(if $(CONFIG_64BIT),.quad,.long);                \
31                   ASM_ALIGN=$(if $(CONFIG_64BIT),3,2);                       \
32                   PROGBITS=$(if $(CONFIG_ARM),%,@)progbits;                  \
33                   echo "/* Generated by firmware/Makefile */"           > $@;\
34                   echo "    .section .rodata"                           >>$@;\
35                   echo "    .p2align $${ASM_ALIGN}"                     >>$@;\
36                   echo "_fw_$${FWSTR}_bin:"                             >>$@;\
37                   echo "    .incbin \"$(2)\""                           >>$@;\
38                   echo "_fw_end:"                                       >>$@;\
39                   echo "   .section .rodata.str,\"aMS\",$${PROGBITS},1" >>$@;\
40                   echo "    .p2align $${ASM_ALIGN}"                     >>$@;\
41                   echo "_fw_$${FWSTR}_name:"                            >>$@;\
42                   echo "    .string \"$$FWNAME\""                       >>$@;\
43                   echo "    .section .builtin_fw,\"a\",$${PROGBITS}"    >>$@;\
44                   echo "    .p2align $${ASM_ALIGN}"                     >>$@;\
45                   echo "    $${ASM_WORD} _fw_$${FWSTR}_name"            >>$@;\
46                   echo "    $${ASM_WORD} _fw_$${FWSTR}_bin"             >>$@;\
47                   echo "    $${ASM_WORD} _fw_end - _fw_$${FWSTR}_bin"   >>$@;
48
49 # One of these files will change, or come into existence, whenever
50 # the configuration changes between 32-bit and 64-bit. The .S files
51 # need to change when that happens.
52 wordsize_deps := $(wildcard include/config/64bit.h include/config/32bit.h \
53                 include/config/ppc32.h include/config/ppc64.h \
54                 include/config/superh32.h include/config/superh64.h \
55                 include/config/x86_32.h include/config/x86_64.h)
56
57 # Workaround for make < 3.81, where .SECONDEXPANSION doesn't work.
58 # It'll end up depending on these targets, so make them a PHONY rule which
59 # depends on _all_ the directories in $(firmware-dirs), and it'll work out OK.
60 PHONY += $(objtree)/$$(%) $(objtree)/$(obj)/$$(%)
61 $(objtree)/$$(%) $(objtree)/$(obj)/$$(%): $(firmware-dirs)
62         @true
63
64 # For the $$(dir %) trick, where we need % to be expanded first.
65 .SECONDEXPANSION:
66
67 $(patsubst %,$(obj)/%.gen.S, $(fw-shipped-y)): %: $(wordsize_deps) \
68                 | $(objtree)/$$(dir %)
69         $(call cmd,fwbin,$(patsubst %.gen.S,%,$@))
70 $(patsubst %,$(obj)/%.gen.S, $(fw-external-y)): %: $(wordsize_deps) \
71                 include/config/builtin/firmware/dir.h | $(objtree)/$$(dir %)
72         $(call cmd,fwbin,$(fwabs)/$(patsubst $(obj)/%.gen.S,%,$@))
73
74 # The .o files depend on the binaries directly; the .S files don't.
75 $(patsubst %,$(obj)/%.gen.o, $(fw-shipped-y)): %.gen.o: %
76 $(patsubst %,$(obj)/%.gen.o, $(fw-external-y)): $(obj)/%.gen.o: $(fwdir)/%
77
78 $(obj)/%: $(obj)/%.ihex | $(objtree)/$(obj)/$$(dir %)
79         $(call cmd,ihex)
80
81 $(firmware-dirs):
82         $(call cmd,mkdir)
83
84 obj-y := $(patsubst %,%.gen.o, $(firmware-y))
85
86 # Remove .S files and binaries created from ihex
87 # (during 'make clean' .config isn't included so they're all in $(fw-shipped-))
88 targets := $(fw-shipped-) $(patsubst $(obj)/%,%, \
89                                 $(shell find $(obj) -name \*.gen.S 2>/dev/null))
90
91 # Without this, built-in.o won't be created when it's empty, and the
92 # final vmlinux link will fail.
93 obj-n := dummy