scripts/Makefile.lib

   1 # SPDX-License-Identifier: GPL-2.0
   2 # Backward compatibility
   3 asflags-y  += $(EXTRA_AFLAGS)
   4 ccflags-y  += $(EXTRA_CFLAGS)
   5 cppflags-y += $(EXTRA_CPPFLAGS)
   6 ldflags-y  += $(EXTRA_LDFLAGS)
   7
   8 #
   9 # flags that take effect in sub directories
  10 export KBUILD_SUBDIR_ASFLAGS := $(KBUILD_SUBDIR_ASFLAGS) $(subdir-asflags-y)
  11 export KBUILD_SUBDIR_CCFLAGS := $(KBUILD_SUBDIR_CCFLAGS) $(subdir-ccflags-y)
  12
  13 # Figure out what we need to build from the various variables
  14 # ===========================================================================
  15
  16 # When an object is listed to be built compiled-in and modular,
  17 # only build the compiled-in version
  18
  19 obj-m := $(filter-out $(obj-y),$(obj-m))
  20
  21 # Libraries are always collected in one lib file.
  22 # Filter out objects already built-in
  23
  24 lib-y := $(filter-out $(obj-y), $(sort $(lib-y) $(lib-m)))
  25
  26
  27 # Handle objects in subdirs
  28 # ---------------------------------------------------------------------------
  29 # o if we encounter foo/ in $(obj-y), replace it by foo/built-in.o
  30 #   and add the directory to the list of dirs to descend into: $(subdir-y)
  31 # o if we encounter foo/ in $(obj-m), remove it from $(obj-m)
  32 #   and add the directory to the list of dirs to descend into: $(subdir-m)
  33
  34 # Determine modorder.
  35 # Unfortunately, we don't have information about ordering between -y
  36 # and -m subdirs.  Just put -y's first.
  37 modorder        := $(patsubst %/,%/modules.order, $(filter %/, $(obj-y)) $(obj-m:.o=.ko))
  38
  39 __subdir-y      := $(patsubst %/,%,$(filter %/, $(obj-y)))
  40 subdir-y        += $(__subdir-y)
  41 __subdir-m      := $(patsubst %/,%,$(filter %/, $(obj-m)))
  42 subdir-m        += $(__subdir-m)
  43 obj-y           := $(patsubst %/, %/built-in.o, $(obj-y))
  44 obj-m           := $(filter-out %/, $(obj-m))
  45
  46 # Subdirectories we need to descend into
  47
  48 subdir-ym       := $(sort $(subdir-y) $(subdir-m))
  49
  50 # if $(foo-objs) exists, foo.o is a composite object
  51 multi-used-y := $(sort $(foreach m,$(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m))))
  52 multi-used-m := $(sort $(foreach m,$(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m))))
  53 multi-used   := $(multi-used-y) $(multi-used-m)
  54 single-used-m := $(sort $(filter-out $(multi-used-m),$(obj-m)))
  55
  56 # Build list of the parts of our composite objects, our composite
  57 # objects depend on those (obviously)
  58 multi-objs-y := $(foreach m, $(multi-used-y), $($(m:.o=-objs)) $($(m:.o=-y)))
  59 multi-objs-m := $(foreach m, $(multi-used-m), $($(m:.o=-objs)) $($(m:.o=-y)))
  60
  61 # $(subdir-obj-y) is the list of objects in $(obj-y) which uses dir/ to
  62 # tell kbuild to descend
  63 subdir-obj-y := $(filter %/built-in.o, $(obj-y))
  64
  65 # Replace multi-part objects by their individual parts, look at local dir only
  66 real-objs-y := $(foreach m, $(filter-out $(subdir-obj-y), $(obj-y)), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m))) $(extra-y)
  67 real-objs-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m)))
  68
  69 # Add subdir path
  70
  71 extra-y         := $(addprefix $(obj)/,$(extra-y))
  72 always          := $(addprefix $(obj)/,$(always))
  73 targets         := $(addprefix $(obj)/,$(targets))
  74 modorder        := $(addprefix $(obj)/,$(modorder))
  75 obj-y           := $(addprefix $(obj)/,$(obj-y))
  76 obj-m           := $(addprefix $(obj)/,$(obj-m))
  77 lib-y           := $(addprefix $(obj)/,$(lib-y))
  78 subdir-obj-y    := $(addprefix $(obj)/,$(subdir-obj-y))
  79 real-objs-y     := $(addprefix $(obj)/,$(real-objs-y))
  80 real-objs-m     := $(addprefix $(obj)/,$(real-objs-m))
  81 single-used-m   := $(addprefix $(obj)/,$(single-used-m))
  82 multi-used-y    := $(addprefix $(obj)/,$(multi-used-y))
  83 multi-used-m    := $(addprefix $(obj)/,$(multi-used-m))
  84 multi-objs-y    := $(addprefix $(obj)/,$(multi-objs-y))
  85 multi-objs-m    := $(addprefix $(obj)/,$(multi-objs-m))
  86 subdir-ym       := $(addprefix $(obj)/,$(subdir-ym))
  87
  88 # These flags are needed for modversions and compiling, so we define them here
  89 # already
  90 # $(modname_flags) #defines KBUILD_MODNAME as the name of the module it will
  91 # end up in (or would, if it gets compiled in)
  92 # Note: Files that end up in two or more modules are compiled without the
  93 #       KBUILD_MODNAME definition. The reason is that any made-up name would
  94 #       differ in different configs.
  95 name-fix = $(squote)$(quote)$(subst $(comma),_,$(subst -,_,$1))$(quote)$(squote)
  96 basename_flags = -DKBUILD_BASENAME=$(call name-fix,$(basetarget))
  97 modname_flags  = $(if $(filter 1,$(words $(modname))),\
  98                  -DKBUILD_MODNAME=$(call name-fix,$(modname)))
  99
 100 orig_c_flags   = $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(KBUILD_SUBDIR_CCFLAGS) \
 101                  $(ccflags-y) $(CFLAGS_$(basetarget).o)
 102 _c_flags       = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(orig_c_flags))
 103 orig_a_flags   = $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) $(KBUILD_SUBDIR_ASFLAGS) \
 104                  $(asflags-y) $(AFLAGS_$(basetarget).o)
 105 _a_flags       = $(filter-out $(AFLAGS_REMOVE_$(basetarget).o), $(orig_a_flags))
 106 _cpp_flags     = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(@F))
 107
 108 #
 109 # Enable gcov profiling flags for a file, directory or for all files depending
 110 # on variables GCOV_PROFILE_obj.o, GCOV_PROFILE and CONFIG_GCOV_PROFILE_ALL
 111 # (in this order)
 112 #
 113 ifeq ($(CONFIG_GCOV_KERNEL),y)
 114 _c_flags += $(if $(patsubst n%,, \
 115                 $(GCOV_PROFILE_$(basetarget).o)$(GCOV_PROFILE)$(CONFIG_GCOV_PROFILE_ALL)), \
 116                 $(CFLAGS_GCOV))
 117 endif
 118
 119 #
 120 # Enable address sanitizer flags for kernel except some files or directories
 121 # we don't want to check (depends on variables KASAN_SANITIZE_obj.o, KASAN_SANITIZE)
 122 #
 123 ifeq ($(CONFIG_KASAN),y)
 124 _c_flags += $(if $(patsubst n%,, \
 125                 $(KASAN_SANITIZE_$(basetarget).o)$(KASAN_SANITIZE)y), \
 126                 $(CFLAGS_KASAN))
 127 endif
 128
 129 # If building the kernel in a separate objtree expand all occurrences
 130 # of -Idir to -I$(srctree)/dir except for absolute paths (starting with '/').
 131
 132 ifeq ($(KBUILD_SRC),)
 133 __c_flags       = $(_c_flags)
 134 __a_flags       = $(_a_flags)
 135 __cpp_flags     = $(_cpp_flags)
 136 else
 137
 138 # -I$(obj) locates generated .h files
 139 # $(call addtree,-I$(obj)) locates .h files in srctree, from generated .c files
 140 #   and locates generated .h files
 141 # FIXME: Replace both with specific CFLAGS* statements in the makefiles
 142 __c_flags       = $(if $(obj),$(call addtree,-I$(src)) -I$(obj)) \
 143                   $(call flags,_c_flags)
 144 __a_flags       = $(call flags,_a_flags)
 145 __cpp_flags     = $(call flags,_cpp_flags)
 146 endif
 147
 148 # Modified for U-Boot: LINUXINCLUDE -> UBOOTINCLUDE
 149 c_flags        = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE)     \
 150                  $(__c_flags) $(modkern_cflags)                           \
 151                  $(basename_flags) $(modname_flags)
 152
 153 a_flags        = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE)     \
 154                  $(__a_flags) $(modkern_aflags)
 155
 156 cpp_flags      = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE)     \
 157                  $(__cpp_flags)
 158
 159 ld_flags       = $(KBUILD_LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F))
 160
 161 # Try these files in order to find the U-Boot-specific .dtsi include file
 162 u_boot_dtsi_options = $(strip $(wildcard $(dir $<)$(basename $(notdir $<))-u-boot.dtsi) \
 163         $(wildcard $(dir $<)$(subst $\",,$(CONFIG_SYS_SOC))-u-boot.dtsi) \
 164         $(wildcard $(dir $<)$(subst $\",,$(CONFIG_SYS_CPU))-u-boot.dtsi) \
 165         $(wildcard $(dir $<)$(subst $\",,$(CONFIG_SYS_VENDOR))-u-boot.dtsi) \
 166         $(wildcard $(dir $<)u-boot.dtsi))
 167
 168 u_boot_dtsi_options_raw = $(warning Automatic .dtsi inclusion: options: \
 169         $(dir $<)$(basename $(notdir $<))-u-boot.dtsi \
 170         $(dir $<)$(subst $\",,$(CONFIG_SYS_SOC))-u-boot.dtsi \
 171         $(dir $<)$(subst $\",,$(CONFIG_SYS_CPU))-u-boot.dtsi \
 172         $(dir $<)$(subst $\",,$(CONFIG_SYS_VENDOR))-u-boot.dtsi \
 173         $(dir $<)u-boot.dtsi ... \
 174         found: $(if $(u_boot_dtsi_options),"$(u_boot_dtsi_options)",nothing!))
 175
 176 # Uncomment for debugging
 177 # This shows all the files that were considered and the one that we chose.
 178 ifdef DEVICE_TREE_DEBUG
 179 u_boot_dtsi_options_debug = $(warning $(u_boot_dtsi_options_raw))
 180 endif
 181
 182 # We use the first match
 183 u_boot_dtsi = $(strip $(u_boot_dtsi_options_debug) \
 184         $(notdir $(firstword $(u_boot_dtsi_options))))
 185
 186 # Modified for U-Boot
 187 dtc_cpp_flags  = -Wp,-MD,$(depfile).pre.tmp -nostdinc                    \
 188                  $(UBOOTINCLUDE)                                         \
 189                  -I$(dir $<)                                             \
 190                  -I$(srctree)/arch/$(ARCH)/dts/include                   \
 191                  -I$(srctree)/include                                    \
 192                  -D__ASSEMBLY__                                          \
 193                  -undef -D__DTS__
 194
 195 # Finds the multi-part object the current object will be linked into
 196 modname-multi = $(sort $(foreach m,$(multi-used),\
 197                 $(if $(filter $(subst $(obj)/,,$*.o), $($(m:.o=-objs)) $($(m:.o=-y))),$(m:.o=))))
 198
 199 # Useful for describing the dependency of composite objects
 200 # Usage:
 201 #   $(call multi_depend, multi_used_targets, suffix_to_remove, suffix_to_add)
 202 define multi_depend
 203 $(foreach m, $(notdir $1), \
 204         $(eval $(obj)/$m: \
 205         $(addprefix $(obj)/, $(foreach s, $3, $($(m:%$(strip $2)=%$(s)))))))
 206 endef
 207
 208 # LEX
 209 # ---------------------------------------------------------------------------
 210 quiet_cmd_flex = LEX     $@
 211       cmd_flex = $(LEX) -o$@ -L $<
 212
 213 $(obj)/%.lex.c: $(src)/%.l FORCE
 214         $(call if_changed,flex)
 215
 216 # YACC
 217 # ---------------------------------------------------------------------------
 218 quiet_cmd_bison = YACC    $@
 219       cmd_bison = $(YACC) -o$@ -t -l $<
 220
 221 $(obj)/%.tab.c: $(src)/%.y FORCE
 222         $(call if_changed,bison)
 223
 224 quiet_cmd_bison_h = YACC    $@
 225       cmd_bison_h = $(YACC) -o/dev/null --defines=$@ -t -l $<
 226
 227 $(obj)/%.tab.h: $(src)/%.y FORCE
 228         $(call if_changed,bison_h)
 229
 230 # Shipped files
 231 # ===========================================================================
 232
 233 quiet_cmd_shipped = SHIPPED $@
 234 cmd_shipped = cat $< > $@
 235
 236 $(obj)/%: $(src)/%_shipped
 237         $(call cmd,shipped)
 238
 239 # Commands useful for building a boot image
 240 # ===========================================================================
 241 #
 242 #       Use as following:
 243 #
 244 #       target: source(s) FORCE
 245 #               $(if_changed,ld/objcopy/gzip)
 246 #
 247 #       and add target to extra-y so that we know we have to
 248 #       read in the saved command line
 249
 250 # Linking
 251 # ---------------------------------------------------------------------------
 252
 253 quiet_cmd_ld = LD      $@
 254 cmd_ld = $(LD) $(ld_flags) $(filter-out FORCE,$^) -o $@
 255
 256 # Objcopy
 257 # ---------------------------------------------------------------------------
 258
 259 quiet_cmd_objcopy = OBJCOPY $@
 260 cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
 261
 262 # Gzip
 263 # ---------------------------------------------------------------------------
 264
 265 quiet_cmd_gzip = GZIP    $@
 266 cmd_gzip = (cat $(filter-out FORCE,$^) | gzip -n -f -9 > $@) || \
 267         (rm -f $@ ; false)
 268
 269 # DTC
 270 # ---------------------------------------------------------------------------
 271
 272 # Disable noisy checks by default
 273 ifeq ($(findstring 1,$(KBUILD_ENABLE_EXTRA_GCC_CHECKS)),)
 274 DTC_FLAGS += -Wno-unit_address_vs_reg \
 275         -Wno-unit_address_format \
 276         -Wno-avoid_unnecessary_addr_size \
 277         -Wno-alias_paths \
 278         -Wno-graph_child_address \
 279         -Wno-graph_port \
 280         -Wno-unique_unit_address \
 281         -Wno-simple_bus_reg \
 282         -Wno-pci_device_reg
 283
 284 # U-Boot specific disables
 285 DTC_FLAGS += -Wno-pci_bridge \
 286         -Wno-pci_device_bus_num
 287 endif
 288
 289 ifneq ($(findstring 2,$(KBUILD_ENABLE_EXTRA_GCC_CHECKS)),)
 290 DTC_FLAGS += -Wnode_name_chars_strict \
 291         -Wproperty_name_chars_strict
 292 endif
 293
 294 DTC_FLAGS += $(DTC_FLAGS_$(basetarget))
 295
 296 # Generate an assembly file to wrap the output of the device tree compiler
 297 quiet_cmd_dt_S_dtb= DTB     $@
 298 # Modified for U-Boot
 299 cmd_dt_S_dtb=                                           \
 300 (                                                       \
 301         echo '.section .dtb.init.rodata,"a"';           \
 302         echo '.balign 16';                              \
 303         echo '.global __dtb_$(subst -,_,$(*F))_begin';  \
 304         echo '__dtb_$(subst -,_,$(*F))_begin:';         \
 305         echo '.incbin "$<" ';                           \
 306         echo '__dtb_$(subst -,_,$(*F))_end:';           \
 307         echo '.global __dtb_$(subst -,_,$(*F))_end';    \
 308         echo '.balign 16';                              \
 309 ) > $@
 310
 311 $(obj)/%.dtb.S: $(obj)/%.dtb
 312         $(call cmd,dt_S_dtb)
 313
 314 ifeq ($(CONFIG_OF_LIBFDT_OVERLAY),y)
 315 DTC_FLAGS += -@
 316 endif
 317
 318 quiet_cmd_dtc = DTC     $@
 319 # Modified for U-Boot
 320 # Bring in any U-Boot-specific include at the end of the file
 321 # And finally any custom .dtsi fragments specified with CONFIG_DEVICE_TREE_INCLUDES
 322 cmd_dtc = mkdir -p $(dir ${dtc-tmp}) ; \
 323         (cat $<; $(if $(u_boot_dtsi),echo '$(pound)include "$(u_boot_dtsi)"')) > $(pre-tmp); \
 324         $(foreach f,$(subst $(quote),,$(CONFIG_DEVICE_TREE_INCLUDES)), \
 325           echo '$(pound)include "$(f)"' >> $(pre-tmp);) \
 326         $(HOSTCC) -E $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $(pre-tmp) ; \
 327         $(DTC) -O dtb -o $@ -b 0 \
 328                 -i $(dir $<) $(DTC_FLAGS) \
 329                 -d $(depfile).dtc.tmp $(dtc-tmp) || \
 330                 (echo "Check $(shell pwd)/$(pre-tmp) for errors" && false) \
 331                 ; \
 332         sed "s:$(pre-tmp):$(<):" $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
 333
 334 $(obj)/%.dtb: $(src)/%.dts $(DTC) FORCE
 335         $(call if_changed_dep,dtc)
 336
 337 pre-tmp = $(subst $(comma),_,$(dot-target).pre.tmp)
 338 dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)
 339
 340 # DTCO
 341 # ---------------------------------------------------------------------------
 342
 343 quiet_cmd_dtco = DTCO    $@
 344 # Rule for objects only; does not put specific u-boot include at the end
 345 # No generation of assembly file either
 346 # Modified for U-Boot
 347 cmd_dtco = mkdir -p $(dir ${dtc-tmp}) ; \
 348         $(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
 349         $(DTC) -@ -O dtb -o $@ -b 0 \
 350                 -i $(dir $<) $(DTC_FLAGS) \
 351                 -d $(depfile).dtc.tmp $(dtc-tmp) ; \
 352         cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
 353
 354 $(obj)/%.dtbo: $(src)/%.dts $(DTC) FORCE
 355         $(call if_changed_dep,dtco)
 356
 357 $(obj)/%.dtbo: $(src)/%.dtso $(DTC) FORCE
 358         $(call if_changed_dep,dtco)
 359
 360 # Fonts
 361 # ---------------------------------------------------------------------------
 362
 363 # Generate an assembly file to wrap the font data
 364 quiet_cmd_S_ttf= TTF     $@
 365 # Modified for U-Boot
 366 cmd_S_ttf=                                              \
 367 (                                                       \
 368         echo '.section .rodata.ttf.init,"a"';           \
 369         echo '.balign 16';                              \
 370         echo '.global __ttf_$(*F)_begin';               \
 371         echo '__ttf_$(*F)_begin:';                      \
 372         echo '.incbin "$<" ';                           \
 373         echo '__ttf_$(*F)_end:';                        \
 374         echo '.global __ttf_$(*F)_end';                 \
 375         echo '.balign 16';                              \
 376 ) > $@
 377
 378 $(obj)/%.S: $(src)/%.ttf
 379         $(call cmd,S_ttf)
 380
 381 # Splash logos
 382 # ---------------------------------------------------------------------------
 383
 384 # Generate an assembly file to wrap the splash data
 385 quiet_cmd_S_splash= TTF     $@
 386 # Modified for U-Boot
 387 cmd_S_splash=                                           \
 388 (                                                       \
 389         echo '.section .rodata.splash.init,"a"';                \
 390         echo '.balign 16';                              \
 391         echo '.global __splash_$(*F)_begin';            \
 392         echo '__splash_$(*F)_begin:';                   \
 393         echo '.incbin "$<" ';                           \
 394         echo '__splash_$(*F)_end:';                     \
 395         echo '.global __splash_$(*F)_end';                      \
 396         echo '.balign 16';                              \
 397 ) > $@
 398
 399 $(obj)/%.S: $(src)/%.bmp
 400         $(call cmd,S_splash)
 401
 402 # EFI applications
 403 # A Makefile target *.efi is built as EFI application.
 404 # A Makefile target *_efi.S wraps *.efi as built-in EFI application.
 405 # ---------------------------------------------------------------------------
 406
 407 # Generate an assembly file to wrap the EFI app
 408 cmd_S_efi=                                      \
 409 (                                               \
 410         echo '.section .rodata.$*.init,"a"';    \
 411         echo '.balign 16';                      \
 412         echo '.global __efi_$*_begin';          \
 413         echo '__efi_$*_begin:';                 \
 414         echo '.incbin "$<" ';                   \
 415         echo '__efi_$*_end:';                   \
 416         echo '.global __efi_$*_end';            \
 417         echo '.balign 16';                      \
 418 ) > $@
 419
 420 $(obj)/%_efi.S: $(obj)/%.efi
 421         $(call cmd,S_efi)
 422
 423 quiet_cmd_efi_objcopy = OBJCOPY $@
 424 cmd_efi_objcopy = $(OBJCOPY) -j .header -j .text -j .sdata -j .data -j \
 425                 .dynamic -j .dynsym  -j .rel* -j .rela* -j .reloc \
 426                 $(if $(EFI_TARGET),$(EFI_TARGET),-O binary) $^ $@
 427
 428 $(obj)/%.efi: $(obj)/%_efi.so
 429         $(call cmd,efi_objcopy)
 430
 431 KBUILD_EFILDFLAGS = -nostdlib -zexecstack -znocombreloc -znorelro
 432 KBUILD_EFILDFLAGS += $(call ld-option,--no-warn-rwx-segments)
 433 quiet_cmd_efi_ld = LD      $@
 434 cmd_efi_ld = $(LD) $(KBUILD_EFILDFLAGS) -T $(EFI_LDS_PATH) \
 435                 -shared -Bsymbolic -s $^ -o $@
 436
 437 EFI_LDS_PATH = $(srctree)/arch/$(ARCH)/lib/$(EFI_LDS)
 438
 439 $(obj)/efi_crt0.o: $(srctree)/arch/$(ARCH)/lib/$(EFI_CRT0:.o=.S) FORCE
 440         $(call if_changed_dep,as_o_S)
 441
 442 $(obj)/efi_reloc.o: $(srctree)/arch/$(ARCH)/lib/$(EFI_RELOC:.o=.c) $(recordmcount_source) FORCE
 443         $(call cmd,force_checksrc)
 444         $(call if_changed_rule,cc_o_c)
 445
 446 $(obj)/%_efi.so: $(obj)/%.o $(obj)/efi_crt0.o $(obj)/efi_reloc.o $(obj)/efi_freestanding.o
 447         $(call cmd,efi_ld)
 448
 449 targets += $(obj)/efi_crt0.o $(obj)/efi_reloc.o $(obj)/efi_freestanding.o
 450
 451 CFLAGS_REMOVE_efi_reloc.o := $(LTO_CFLAGS)
 452 CFLAGS_REMOVE_efi_freestanding.o := $(LTO_CFLAGS)
 453
 454 # ACPI
 455 # ---------------------------------------------------------------------------
 456 #
 457 # This first sends the file (typically dsdt.asl) through the preprocessor
 458 # resolve includes and any CONFIG options used. This produces dsdt.asl.tmp
 459 # which is pure ASL code. The Intel ASL (ACPI (Advanced Configuration and Power
 460 # Interface) Source Language compiler (iasl) then converts this ASL code into a
 461 # C file containing the hex data to build into U-Boot. This file is called
 462 # dsdt_generated.hex (despite us setting the prefix to .../dsdt_generated.asl.tmp)
 463 # so must be renamed to dsdt_generated.c for consumption by the build system.
 464 ASL_TMP = $(patsubst %.c,%.asl.tmp,$@)
 465
 466 quiet_cmd_acpi_c_asl= ASL     $<
 467 cmd_acpi_c_asl=         \
 468         $(CPP) -x assembler-with-cpp -D__ASSEMBLY__ -D__ACPI__ \
 469                 -P $(UBOOTINCLUDE) -o $(ASL_TMP) $< && \
 470         iasl -p $@ -I $(srctree)/board/$(BOARDDIR) -tc $(ASL_TMP) \
 471                 $(if $(KBUILD_VERBOSE:1=), >/dev/null) && \
 472         mv $(patsubst %.c,%.hex,$@) $@
 473
 474 $(obj)/dsdt_generated.c:    $(src)/dsdt.asl
 475         $(call cmd,acpi_c_asl)
 476         $(Q)sed -i -e "s,dsdt_generated_aml_code,AmlCode," $@
 477
 478 # Bzip2
 479 # ---------------------------------------------------------------------------
 480
 481 # Bzip2 and LZMA do not include size in file... so we have to fake that;
 482 # append the size as a 32-bit littleendian number as gzip does.
 483 size_append = printf $(shell                                            \
 484 dec_size=0;                                                             \
 485 for F in $1; do                                                         \
 486         fsize=$$(stat -c "%s" $$F);                                     \
 487         dec_size=$$(expr $$dec_size + $$fsize);                         \
 488 done;                                                                   \
 489 printf "%08x\n" $$dec_size |                                            \
 490         sed 's/\(..\)/\1 /g' | {                                        \
 491                 read ch0 ch1 ch2 ch3;                                   \
 492                 for ch in $$ch3 $$ch2 $$ch1 $$ch0; do                   \
 493                         printf '%s%03o' '\\' $$((0x$$ch));              \
 494                 done;                                                   \
 495         }                                                               \
 496 )
 497
 498 quiet_cmd_bzip2 = BZIP2   $@
 499 cmd_bzip2 = (cat $(filter-out FORCE,$^) | \
 500         bzip2 -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
 501         (rm -f $@ ; false)
 502
 503 # Lzma
 504 # ---------------------------------------------------------------------------
 505
 506 quiet_cmd_lzma = LZMA    $@
 507 cmd_lzma = (cat $(filter-out FORCE,$^) | \
 508         lzma -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
 509         (rm -f $@ ; false)
 510
 511 quiet_cmd_lzo = LZO     $@
 512 cmd_lzo = (cat $(filter-out FORCE,$^) | \
 513         lzop -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
 514         (rm -f $@ ; false)
 515
 516 quiet_cmd_lz4 = LZ4     $@
 517 cmd_lz4 = (cat $(filter-out FORCE,$^) | \
 518         lz4c -l -c1 stdin stdout && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
 519         (rm -f $@ ; false)
 520
 521 # U-Boot mkimage
 522 # ---------------------------------------------------------------------------
 523
 524 MKIMAGE := $(srctree)/scripts/mkuboot.sh
 525
 526 # SRCARCH just happens to match slightly more than ARCH (on sparc), so reduces
 527 # the number of overrides in arch makefiles
 528 UIMAGE_ARCH ?= $(SRCARCH)
 529 UIMAGE_COMPRESSION ?= $(if $(2),$(2),none)
 530 UIMAGE_OPTS-y ?=
 531 UIMAGE_TYPE ?= kernel
 532 UIMAGE_LOADADDR ?= arch_must_set_this
 533 UIMAGE_ENTRYADDR ?= $(UIMAGE_LOADADDR)
 534 UIMAGE_NAME ?= 'Linux-$(KERNELRELEASE)'
 535 UIMAGE_IN ?= $<
 536 UIMAGE_OUT ?= $@
 537
 538 quiet_cmd_uimage = UIMAGE  $(UIMAGE_OUT)
 539       cmd_uimage = $(CONFIG_SHELL) $(MKIMAGE) -A $(UIMAGE_ARCH) -O linux \
 540                         -C $(UIMAGE_COMPRESSION) $(UIMAGE_OPTS-y) \
 541                         -T $(UIMAGE_TYPE) \
 542                         -a $(UIMAGE_LOADADDR) -e $(UIMAGE_ENTRYADDR) \
 543                         -n $(UIMAGE_NAME) -d $(UIMAGE_IN) $(UIMAGE_OUT)
 544
 545 # XZ
 546 # ---------------------------------------------------------------------------
 547 # Use xzkern to compress the kernel image and xzmisc to compress other things.
 548 #
 549 # xzkern uses a big LZMA2 dictionary since it doesn't increase memory usage
 550 # of the kernel decompressor. A BCJ filter is used if it is available for
 551 # the target architecture. xzkern also appends uncompressed size of the data
 552 # using size_append. The .xz format has the size information available at
 553 # the end of the file too, but it's in more complex format and it's good to
 554 # avoid changing the part of the boot code that reads the uncompressed size.
 555 # Note that the bytes added by size_append will make the xz tool think that
 556 # the file is corrupt. This is expected.
 557 #
 558 # xzmisc doesn't use size_append, so it can be used to create normal .xz
 559 # files. xzmisc uses smaller LZMA2 dictionary than xzkern, because a very
 560 # big dictionary would increase the memory usage too much in the multi-call
 561 # decompression mode. A BCJ filter isn't used either.
 562 quiet_cmd_xzkern = XZKERN  $@
 563 cmd_xzkern = (cat $(filter-out FORCE,$^) | \
 564         sh $(srctree)/scripts/xz_wrap.sh && \
 565         $(call size_append, $(filter-out FORCE,$^))) > $@ || \
 566         (rm -f $@ ; false)
 567
 568 quiet_cmd_xzmisc = XZMISC  $@
 569 cmd_xzmisc = (cat $(filter-out FORCE,$^) | \
 570         xz --check=crc32 --lzma2=dict=1MiB) > $@ || \
 571         (rm -f $@ ; false)
 572
 573 # Additional commands for U-Boot
 574 #
 575 # bin2c
 576 # ---------------------------------------------------------------------------
 577 quiet_cmd_bin2c = BIN2C   $@
 578       cmd_bin2c = $(objtree)/scripts/bin2c $2 < $< > $@
 579
 580 # mkimage
 581 # ---------------------------------------------------------------------------
 582 MKIMAGEOUTPUT ?= /dev/null
 583 quiet_cmd_mkimage = MKIMAGE $@
 584 cmd_mkimage = $(objtree)/tools/mkimage $(MKIMAGEFLAGS_$(@F)) -d $< $@ \
 585         >$(MKIMAGEOUTPUT) $(if $(KBUILD_VERBOSE:0=), && cat $(MKIMAGEOUTPUT))
 586
 587 # fdtgrep
 588 # ---------------------------------------------------------------------------
 589 # Pass the original device tree file through fdtgrep twice. The first pass
 590 # removes any unwanted nodes (i.e. those which don't have the
 591 # 'bootph-all' property and thus are not needed by SPL. The second
 592 # pass removes various unused properties from the remaining nodes.
 593 # The output is typically a much smaller device tree file.
 594
 595 ifdef CONFIG_OF_TAG_MIGRATE
 596 # Support the old tags for a migration period
 597 migrate_tpl := -b u-boot,dm-pre-reloc -b u-boot,dm-tpl
 598 migrate_vpl := -b u-boot,dm-pre-reloc -b u-boot,dm-vpl
 599 migrate_spl := -b u-boot,dm-pre-reloc -b u-boot,dm-spl
 600 migrate_all := -P u-boot,dm-pre-reloc \
 601         -P u-boot,dm-spl -P u-boot,dm-tpl -P u-boot,dm-vpl
 602 endif
 603
 604 ifeq ($(CONFIG_VPL_BUILD),y)
 605 fdtgrep_props := -b bootph-all -b bootph-verify $(migrate_vpl)
 606 else
 607 ifeq ($(CONFIG_TPL_BUILD),y)
 608 fdtgrep_props := -b bootph-all -b bootph-pre-sram $(migrate_tpl)
 609 else
 610 fdtgrep_props := -b bootph-all -b bootph-pre-ram $(migrate_spl)
 611 endif
 612 endif
 613 quiet_cmd_fdtgrep = FDTGREP $@
 614       cmd_fdtgrep = $(objtree)/tools/fdtgrep $(fdtgrep_props) -RT $< \
 615                 -n /chosen -n /config -O dtb | \
 616         $(objtree)/tools/fdtgrep -r -O dtb - -o $@ \
 617                 -P bootph-all -P bootph-pre-ram -P bootph-pre-sram \
 618                 -P bootph-verify \
 619                 $(migrate_all) \
 620                 $(addprefix -P ,$(subst $\",,$(CONFIG_OF_SPL_REMOVE_PROPS)))
 621
 622 # fdt_rm_props
 623 # ---------------------------------------------------------------------------
 624 # Pass the original device tree file through fdtgrep. This removes various
 625 # unused properties. The output is typically a smaller device tree file.
 626 quiet_cmd_fdt_rm_props = FDTGREP $@
 627         cmd_fdt_rm_props = cat $< | $(objtree)/tools/fdtgrep -r -O dtb - -o $@ \
 628                         $(addprefix -P ,$(subst $\",,$(CONFIG_OF_REMOVE_PROPS)))
 629
 630 # ASM offsets
 631 # ---------------------------------------------------------------------------
 632
 633 # Default sed regexp - multiline due to syntax constraints
 634 define sed-offsets
 635         "s:[[:space:]]*\.ascii[[:space:]]*\"\(.*\)\":\1:; \
 636         /^->/{s:->#\(.*\):/* \1 */:; \
 637         s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \
 638         s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \
 639         s:->::; p;}"
 640 endef
 641
 642 # Use filechk to avoid rebuilds when a header changes, but the resulting file
 643 # does not
 644 define filechk_offsets
 645         (set -e; \
 646          echo "#ifndef $2"; \
 647          echo "#define $2"; \
 648          echo "/*"; \
 649          echo " * DO NOT MODIFY."; \
 650          echo " *"; \
 651          echo " * This file was generated by Kbuild"; \
 652          echo " */"; \
 653          echo ""; \
 654          sed -ne $(sed-offsets); \
 655          echo ""; \
 656          echo "#endif" )
 657 endef