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      1 #
      2 # Copyright (c) 2013-2014, ARM Limited and Contributors. All rights reserved.
      3 #
      4 # Redistribution and use in source and binary forms, with or without
      5 # modification, are permitted provided that the following conditions are met:
      6 #
      7 # Redistributions of source code must retain the above copyright notice, this
      8 # list of conditions and the following disclaimer.
      9 #
     10 # Redistributions in binary form must reproduce the above copyright notice,
     11 # this list of conditions and the following disclaimer in the documentation
     12 # and/or other materials provided with the distribution.
     13 #
     14 # Neither the name of ARM nor the names of its contributors may be used
     15 # to endorse or promote products derived from this software without specific
     16 # prior written permission.
     17 #
     18 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
     19 # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     20 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     21 # ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
     22 # LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     23 # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     24 # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     25 # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     26 # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     27 # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     28 # POSSIBILITY OF SUCH DAMAGE.
     29 #
     30 
     31 #
     32 # Trusted Firmware Version
     33 #
     34 VERSION_MAJOR		:= 1
     35 VERSION_MINOR		:= 1
     36 
     37 #
     38 # Default values for build configurations
     39 #
     40 
     41 # Build verbosity
     42 V			:= 0
     43 # Debug build
     44 DEBUG			:= 0
     45 # Build architecture
     46 ARCH 			:= aarch64
     47 # Build platform
     48 DEFAULT_PLAT		:= fvp
     49 PLAT			:= ${DEFAULT_PLAT}
     50 # SPD choice
     51 SPD			:= none
     52 # Base commit to perform code check on
     53 BASE_COMMIT		:= origin/master
     54 # NS timer register save and restore
     55 NS_TIMER_SWITCH		:= 0
     56 # By default, Bl1 acts as the reset handler, not BL31
     57 RESET_TO_BL31		:= 0
     58 # Include FP registers in cpu context
     59 CTX_INCLUDE_FPREGS		:= 0
     60 # Determine the version of ARM GIC architecture to use for interrupt management
     61 # in EL3. The platform port can change this value if needed.
     62 ARM_GIC_ARCH		:=	2
     63 # Flag used to indicate if ASM_ASSERTION should be enabled for the build.
     64 # This defaults to being present in DEBUG builds only.
     65 ASM_ASSERTION		:=	${DEBUG}
     66 # Build option to choose whether Trusted firmware uses Coherent memory or not.
     67 USE_COHERENT_MEM	:=	1
     68 # Default FIP file name
     69 FIP_NAME		:= fip.bin
     70 # By default, use the -pedantic option in the gcc command line
     71 DISABLE_PEDANTIC	:= 0
     72 # Flags to generate the Chain of Trust
     73 GENERATE_COT		:= 0
     74 CREATE_KEYS		:= 1
     75 # Flags to build TF with Trusted Boot support
     76 TRUSTED_BOARD_BOOT	:= 0
     77 AUTH_MOD		:= none
     78 
     79 # Checkpatch ignores
     80 CHECK_IGNORE		=	--ignore COMPLEX_MACRO
     81 
     82 CHECKPATCH_ARGS		=	--no-tree --no-signoff ${CHECK_IGNORE}
     83 CHECKCODE_ARGS		=	--no-patch --no-tree --no-signoff ${CHECK_IGNORE}
     84 
     85 ifeq (${V},0)
     86 	Q=@
     87 	CHECKCODE_ARGS	+=	--no-summary --terse
     88 else
     89 	Q=
     90 endif
     91 export Q
     92 
     93 ifneq (${DEBUG}, 0)
     94 	BUILD_TYPE	:=	debug
     95 	# Use LOG_LEVEL_INFO by default for debug builds
     96 	LOG_LEVEL	:=	40
     97 else
     98 	BUILD_TYPE	:=	release
     99 	# Use LOG_LEVEL_NOTICE by default for release builds
    100 	LOG_LEVEL	:=	20
    101 endif
    102 
    103 # Default build string (git branch and commit)
    104 ifeq (${BUILD_STRING},)
    105 	BUILD_STRING	:=	$(shell git log -n 1 --pretty=format:"%h")
    106 endif
    107 
    108 VERSION_STRING		:=	v${VERSION_MAJOR}.${VERSION_MINOR}(${BUILD_TYPE}):${BUILD_STRING}
    109 
    110 BL_COMMON_SOURCES	:=	common/bl_common.c			\
    111 				common/tf_printf.c			\
    112 				common/aarch64/debug.S			\
    113 				lib/aarch64/cache_helpers.S		\
    114 				lib/aarch64/misc_helpers.S		\
    115 				lib/aarch64/xlat_helpers.c		\
    116 				lib/stdlib/std.c			\
    117 				plat/common/aarch64/platform_helpers.S
    118 
    119 BUILD_BASE		:=	./build
    120 BUILD_PLAT		:=	${BUILD_BASE}/${PLAT}/${BUILD_TYPE}
    121 
    122 PLATFORMS		:=	$(shell ls -I common plat/)
    123 SPDS			:=	$(shell ls -I none services/spd)
    124 HELP_PLATFORMS		:=	$(shell echo ${PLATFORMS} | sed 's/ /|/g')
    125 
    126 # Convenience function for adding build definitions
    127 # $(eval $(call add_define,FOO)) will have:
    128 # -DFOO if $(FOO) is empty; -DFOO=$(FOO) otherwise
    129 define add_define
    130 DEFINES			+=	-D$(1)$(if $(value $(1)),=$(value $(1)),)
    131 endef
    132 
    133 # Convenience function for verifying option has a boolean value
    134 # $(eval $(call assert_boolean,FOO)) will assert FOO is 0 or 1
    135 define assert_boolean
    136 $(and $(patsubst 0,,$(value $(1))),$(patsubst 1,,$(value $(1))),$(error $(1) must be boolean))
    137 endef
    138 
    139 ifeq (${PLAT},)
    140   $(error "Error: Unknown platform. Please use PLAT=<platform name> to specify the platform.")
    141 endif
    142 ifeq ($(findstring ${PLAT},${PLATFORMS}),)
    143   $(error "Error: Invalid platform. The following platforms are available: ${PLATFORMS}")
    144 endif
    145 
    146 all: msg_start
    147 
    148 msg_start:
    149 	@echo "Building ${PLAT}"
    150 
    151 include plat/${PLAT}/platform.mk
    152 
    153 # Include the CPU specific operations makefile. By default all CPU errata
    154 # workarounds and CPU specifc optimisations are disabled. This can be
    155 # overridden by the platform.
    156 include lib/cpus/cpu-ops.mk
    157 
    158 ifdef BL1_SOURCES
    159 NEED_BL1 := yes
    160 include bl1/bl1.mk
    161 endif
    162 
    163 ifdef BL2_SOURCES
    164 NEED_BL2 := yes
    165 include bl2/bl2.mk
    166 # Using the ARM Trusted Firmware BL2 implies that a BL3-3 image also need to be supplied for the FIP.
    167 # This flag can be overridden by the platform.
    168 NEED_BL33 ?= yes
    169 endif
    170 
    171 ifdef BL31_SOURCES
    172 NEED_BL31 := yes
    173 include bl31/bl31.mk
    174 endif
    175 
    176 # Include SPD Makefile if one has been specified
    177 ifneq (${SPD},none)
    178   # We expect to locate an spd.mk under the specified SPD directory
    179   SPD_MAKE		:=	$(shell m="services/spd/${SPD}/${SPD}.mk"; [ -f "$$m" ] && echo "$$m")
    180 
    181   ifeq (${SPD_MAKE},)
    182     $(error Error: No services/spd/${SPD}/${SPD}.mk located)
    183   endif
    184   $(info Including ${SPD_MAKE})
    185   include ${SPD_MAKE}
    186 
    187   # If there's BL3-2 companion for the chosen SPD, and the SPD wants to build the
    188   # BL3-2 from source, we expect that the SPD's Makefile would set NEED_BL32
    189   # variable to "yes". In case the BL3-2 is a binary which needs to be included in
    190   # fip, then the NEED_BL32 needs to be set and BL3-2 would need to point to the bin.
    191 endif
    192 
    193 .PHONY:			all msg_start clean realclean distclean cscope locate-checkpatch checkcodebase checkpatch fiptool fip certtool
    194 .SUFFIXES:
    195 
    196 INCLUDES		+=	-Iinclude/bl31			\
    197 				-Iinclude/bl31/services		\
    198 				-Iinclude/common		\
    199 				-Iinclude/drivers		\
    200 				-Iinclude/drivers/arm		\
    201 				-Iinclude/drivers/io		\
    202 				-Iinclude/lib			\
    203 				-Iinclude/lib/aarch64		\
    204 				-Iinclude/lib/cpus/aarch64	\
    205 				-Iinclude/plat/common		\
    206 				-Iinclude/stdlib		\
    207 				-Iinclude/stdlib/sys		\
    208 				${PLAT_INCLUDES}		\
    209 				${SPD_INCLUDES}
    210 
    211 # Process DEBUG flag
    212 $(eval $(call assert_boolean,DEBUG))
    213 $(eval $(call add_define,DEBUG))
    214 ifeq (${DEBUG},0)
    215   $(eval $(call add_define,NDEBUG))
    216 else
    217 CFLAGS			+= 	-g
    218 ASFLAGS			+= 	-g -Wa,--gdwarf-2
    219 endif
    220 
    221 # Process NS_TIMER_SWITCH flag
    222 $(eval $(call assert_boolean,NS_TIMER_SWITCH))
    223 $(eval $(call add_define,NS_TIMER_SWITCH))
    224 
    225 # Process RESET_TO_BL31 flag
    226 $(eval $(call assert_boolean,RESET_TO_BL31))
    227 $(eval $(call add_define,RESET_TO_BL31))
    228 
    229 # Process CTX_INCLUDE_FPREGS flag
    230 $(eval $(call assert_boolean,CTX_INCLUDE_FPREGS))
    231 $(eval $(call add_define,CTX_INCLUDE_FPREGS))
    232 
    233 # Process ARM_GIC_ARCH flag
    234 $(eval $(call add_define,ARM_GIC_ARCH))
    235 
    236 # Process ASM_ASSERTION flag
    237 $(eval $(call assert_boolean,ASM_ASSERTION))
    238 $(eval $(call add_define,ASM_ASSERTION))
    239 
    240 # Process LOG_LEVEL flag
    241 $(eval $(call add_define,LOG_LEVEL))
    242 
    243 # Process USE_COHERENT_MEM flag
    244 $(eval $(call assert_boolean,USE_COHERENT_MEM))
    245 $(eval $(call add_define,USE_COHERENT_MEM))
    246 
    247 # Process Generate CoT flags
    248 $(eval $(call assert_boolean,GENERATE_COT))
    249 $(eval $(call assert_boolean,CREATE_KEYS))
    250 
    251 # Process TRUSTED_BOARD_BOOT flag
    252 $(eval $(call assert_boolean,TRUSTED_BOARD_BOOT))
    253 $(eval $(call add_define,TRUSTED_BOARD_BOOT))
    254 
    255 ASFLAGS			+= 	-nostdinc -ffreestanding -Wa,--fatal-warnings	\
    256 				-Werror -Wmissing-include-dirs			\
    257 				-mgeneral-regs-only -D__ASSEMBLY__		\
    258 				${DEFINES} ${INCLUDES}
    259 CFLAGS			+= 	-nostdinc -ffreestanding -Wall			\
    260 				-Werror -Wmissing-include-dirs			\
    261 				-mgeneral-regs-only -mstrict-align		\
    262 				-std=c99 -c -Os	${DEFINES} ${INCLUDES} -fno-pic
    263 CFLAGS			+=	-ffunction-sections -fdata-sections		\
    264 				-fno-delete-null-pointer-checks
    265 
    266 LDFLAGS			+=	--fatal-warnings -O1
    267 LDFLAGS			+=	--gc-sections
    268 
    269 
    270 CC			:=	${CROSS_COMPILE}gcc
    271 CPP			:=	${CROSS_COMPILE}cpp
    272 AS			:=	${CROSS_COMPILE}gcc
    273 AR			:=	${CROSS_COMPILE}ar
    274 LD			:=	${CROSS_COMPILE}ld
    275 OC			:=	${CROSS_COMPILE}objcopy
    276 OD			:=	${CROSS_COMPILE}objdump
    277 NM			:=	${CROSS_COMPILE}nm
    278 PP			:=	${CROSS_COMPILE}gcc -E ${CFLAGS}
    279 
    280 # Variables for use with Firmware Image Package
    281 FIPTOOLPATH		?=	tools/fip_create
    282 FIPTOOL			?=	${FIPTOOLPATH}/fip_create
    283 fiptool:		${FIPTOOL}
    284 fip:			${BUILD_PLAT}/${FIP_NAME}
    285 
    286 # Variables for use with Certificate Generation Tool
    287 CRTTOOLPATH		?=	tools/cert_create
    288 CRTTOOL			?=	${CRTTOOLPATH}/cert_create
    289 certtool:		${CRTTOOL}
    290 
    291 # CoT generation tool default parameters
    292 TRUSTED_KEY_CERT	:=	${BUILD_PLAT}/trusted_key.crt
    293 
    294 # Pass the private keys to the CoT generation tool in the command line
    295 # If CREATE_KEYS is set, the '-n' option will be added, indicating the tool to create new keys
    296 ifneq (${GENERATE_COT},0)
    297     $(eval CERTS := yes)
    298 
    299     $(eval FIP_DEPS += certificates)
    300     $(eval FIP_ARGS += --trusted-key-cert ${TRUSTED_KEY_CERT})
    301 
    302     ifneq (${CREATE_KEYS},0)
    303         $(eval CRT_ARGS += -n)
    304     endif
    305     $(eval CRT_ARGS += $(if ${ROT_KEY}, --rot-key ${ROT_KEY}))
    306     $(eval CRT_ARGS += $(if ${TRUSTED_WORLD_KEY}, --trusted-world-key ${TRUSTED_WORLD_KEY}))
    307     $(eval CRT_ARGS += $(if ${NON_TRUSTED_WORLD_KEY}, --non-trusted-world-key ${NON_TRUSTED_WORLD_KEY}))
    308     $(eval CRT_ARGS += --trusted-key-cert ${TRUSTED_KEY_CERT})
    309 endif
    310 
    311 # Check Trusted Board Boot options
    312 ifneq (${TRUSTED_BOARD_BOOT},0)
    313     ifeq (${AUTH_MOD},none)
    314         $(error Error: When TRUSTED_BOARD_BOOT=1, AUTH_MOD has to be the name of a valid authentication module)
    315     else
    316         # We expect to locate an *.mk file under the specified AUTH_MOD directory
    317         AUTH_MAKE := $(shell m="common/auth/${AUTH_MOD}/${AUTH_MOD}.mk"; [ -f "$$m" ] && echo "$$m")
    318         ifeq (${AUTH_MAKE},)
    319             $(error Error: No common/auth/${AUTH_MOD}/${AUTH_MOD}.mk located)
    320         endif
    321         $(info Including ${AUTH_MAKE})
    322         include ${AUTH_MAKE}
    323     endif
    324 
    325     BL_COMMON_SOURCES	+=	common/auth.c
    326 endif
    327 
    328 # Check if -pedantic option should be used
    329 ifeq (${DISABLE_PEDANTIC},0)
    330     CFLAGS		+= 	-pedantic
    331 endif
    332 
    333 locate-checkpatch:
    334 ifndef CHECKPATCH
    335 	$(error "Please set CHECKPATCH to point to the Linux checkpatch.pl file, eg: CHECKPATCH=../linux/script/checkpatch.pl")
    336 else
    337 ifeq (,$(wildcard ${CHECKPATCH}))
    338 	$(error "The file CHECKPATCH points to cannot be found, use eg: CHECKPATCH=../linux/script/checkpatch.pl")
    339 endif
    340 endif
    341 
    342 clean:
    343 			@echo "  CLEAN"
    344 			${Q}rm -rf ${BUILD_PLAT}
    345 			${Q}${MAKE} --no-print-directory -C ${FIPTOOLPATH} clean
    346 			${Q}${MAKE} PLAT=${PLAT} --no-print-directory -C ${CRTTOOLPATH} clean
    347 
    348 realclean distclean:
    349 			@echo "  REALCLEAN"
    350 			${Q}rm -rf ${BUILD_BASE}
    351 			${Q}rm -f ${CURDIR}/cscope.*
    352 			${Q}${MAKE} --no-print-directory -C ${FIPTOOLPATH} clean
    353 			${Q}${MAKE} PLAT=${PLAT} --no-print-directory -C ${CRTTOOLPATH} clean
    354 
    355 checkcodebase:		locate-checkpatch
    356 			@echo "  CHECKING STYLE"
    357 			@if test -d .git ; then	\
    358 				git ls-files | grep -v stdlib | while read GIT_FILE ; do ${CHECKPATCH} ${CHECKCODE_ARGS} -f $$GIT_FILE ; done ;	\
    359 			 else			\
    360 				 find . -type f -not -iwholename "*.git*" -not -iwholename "*build*" -not -iwholename "*stdlib*" -exec ${CHECKPATCH} ${CHECKCODE_ARGS} -f {} \; ;	\
    361 			 fi
    362 
    363 checkpatch:		locate-checkpatch
    364 			@echo "  CHECKING STYLE"
    365 			@git format-patch --stdout ${BASE_COMMIT} | ${CHECKPATCH} ${CHECKPATCH_ARGS} - || true
    366 
    367 .PHONY: ${CRTTOOL}
    368 ${CRTTOOL}:
    369 			${Q}${MAKE} PLAT=${PLAT} --no-print-directory -C ${CRTTOOLPATH}
    370 			@echo
    371 			@echo "Built $@ successfully"
    372 			@echo
    373 
    374 .PHONY: ${FIPTOOL}
    375 ${FIPTOOL}:
    376 			${Q}${MAKE} --no-print-directory -C ${FIPTOOLPATH}
    377 
    378 define match_goals
    379 $(strip $(foreach goal,$(1),$(filter $(goal),$(MAKECMDGOALS))))
    380 endef
    381 
    382 # List of rules that involve building things
    383 BUILD_TARGETS := all bl1 bl2 bl31 bl32 fip
    384 
    385 # Does the list of goals specified on the command line include a build target?
    386 ifneq ($(call match_goals,${BUILD_TARGETS}),)
    387 IS_ANYTHING_TO_BUILD := 1
    388 endif
    389 
    390 define MAKE_C
    391 
    392 $(eval OBJ := $(1)/$(patsubst %.c,%.o,$(notdir $(2))))
    393 $(eval PREREQUISITES := $(patsubst %.o,%.d,$(OBJ)))
    394 
    395 $(OBJ) : $(2)
    396 	@echo "  CC      $$<"
    397 	$$(Q)$$(CC) $$(CFLAGS) -DIMAGE_BL$(3) -c $$< -o $$@
    398 
    399 
    400 $(PREREQUISITES) : $(2)
    401 	@echo "  DEPS    $$@"
    402 	@mkdir -p $(1)
    403 	$$(Q)$$(CC) $$(CFLAGS) -M -MT $(OBJ) -MF $$@ $$<
    404 
    405 ifdef IS_ANYTHING_TO_BUILD
    406 -include $(PREREQUISITES)
    407 endif
    408 
    409 endef
    410 
    411 
    412 define MAKE_S
    413 
    414 $(eval OBJ := $(1)/$(patsubst %.S,%.o,$(notdir $(2))))
    415 $(eval PREREQUISITES := $(patsubst %.o,%.d,$(OBJ)))
    416 
    417 $(OBJ) : $(2)
    418 	@echo "  AS      $$<"
    419 	$$(Q)$$(AS) $$(ASFLAGS) -DIMAGE_BL$(3) -c $$< -o $$@
    420 
    421 $(PREREQUISITES) : $(2)
    422 	@echo "  DEPS    $$@"
    423 	@mkdir -p $(1)
    424 	$$(Q)$$(AS) $$(ASFLAGS) -M -MT $(OBJ) -MF $$@ $$<
    425 
    426 ifdef IS_ANYTHING_TO_BUILD
    427 -include $(PREREQUISITES)
    428 endif
    429 
    430 endef
    431 
    432 
    433 define MAKE_LD
    434 
    435 $(eval PREREQUISITES := $(1).d)
    436 
    437 $(1) : $(2)
    438 	@echo "  PP      $$<"
    439 	$$(Q)$$(AS) $$(ASFLAGS) -P -E -D__LINKER__ -o $$@ $$<
    440 
    441 $(PREREQUISITES) : $(2)
    442 	@echo "  DEPS    $$@"
    443 	@mkdir -p $$(dir $$@)
    444 	$$(Q)$$(AS) $$(ASFLAGS) -M -MT $(1) -MF $$@ $$<
    445 
    446 ifdef IS_ANYTHING_TO_BUILD
    447 -include $(PREREQUISITES)
    448 endif
    449 
    450 endef
    451 
    452 
    453 define MAKE_OBJS
    454 	$(eval C_OBJS := $(filter %.c,$(2)))
    455 	$(eval REMAIN := $(filter-out %.c,$(2)))
    456 	$(eval $(foreach obj,$(C_OBJS),$(call MAKE_C,$(1),$(obj),$(3))))
    457 
    458 	$(eval S_OBJS := $(filter %.S,$(REMAIN)))
    459 	$(eval REMAIN := $(filter-out %.S,$(REMAIN)))
    460 	$(eval $(foreach obj,$(S_OBJS),$(call MAKE_S,$(1),$(obj),$(3))))
    461 
    462 	$(and $(REMAIN),$(error Unexpected source files present: $(REMAIN)))
    463 endef
    464 
    465 
    466 # NOTE: The line continuation '\' is required in the next define otherwise we
    467 # end up with a line-feed characer at the end of the last c filename.
    468 # Also bare this issue in mind if extending the list of supported filetypes.
    469 define SOURCES_TO_OBJS
    470 	$(notdir $(patsubst %.c,%.o,$(filter %.c,$(1)))) \
    471 	$(notdir $(patsubst %.S,%.o,$(filter %.S,$(1))))
    472 endef
    473 
    474 
    475 # MAKE_TOOL_ARGS macro defines the command line arguments for the FIP and CRT
    476 # tools at each BL stage. Arguments:
    477 #   $(1) = BL stage (2, 30, 31, 32, 33)
    478 #   $(2) = Binary file
    479 #   $(3) = In FIP (false if empty)
    480 #   $(4) = Create certificates (false if empty)
    481 #   $(5) = Create key certificate (false if empty)
    482 #   $(6) = Private key (optional)
    483 define MAKE_TOOL_ARGS
    484 
    485 $(eval FIP_DEPS += $(if $3,$(2),))
    486 $(eval FIP_ARGS += $(if $3,--bl$(1) $(2),))
    487 $(eval FIP_ARGS += $(if $4,--bl$(1)-cert $(BUILD_PLAT)/bl$(1).crt))
    488 $(eval FIP_ARGS += $(if $4,$(if $5,--bl$(1)-key-cert $(BUILD_PLAT)/bl$(1)_key.crt)))
    489 
    490 $(eval CRT_DEPS += $(if $4,$(2),))
    491 $(eval CRT_DEPS += $(if $4,$(if $6,$(6),)))
    492 $(eval CRT_ARGS += $(if $4,--bl$(1) $(2)))
    493 $(eval CRT_ARGS += $(if $4,$(if $6,--bl$(1)-key $(6))))
    494 $(eval CRT_ARGS += $(if $4,--bl$(1)-cert $(BUILD_PLAT)/bl$(1).crt))
    495 $(eval CRT_ARGS += $(if $4,$(if $5,--bl$(1)-key-cert $(BUILD_PLAT)/bl$(1)_key.crt)))
    496 
    497 endef
    498 
    499 
    500 # MAKE_BL macro defines the targets and options to build each BL image.
    501 # Arguments:
    502 #   $(1) = BL stage (2, 30, 31, 32, 33)
    503 #   $(2) = In FIP (false if empty)
    504 #   $(3) = Create certificates (false if empty)
    505 #   $(4) = Create key certificate (false if empty)
    506 #   $(5) = Private key (optional)
    507 define MAKE_BL
    508 	$(eval BUILD_DIR  := ${BUILD_PLAT}/bl$(1))
    509 	$(eval SOURCES    := $(BL$(1)_SOURCES) $(BL_COMMON_SOURCES) $(PLAT_BL_COMMON_SOURCES))
    510 	$(eval OBJS       := $(addprefix $(BUILD_DIR)/,$(call SOURCES_TO_OBJS,$(SOURCES))))
    511 	$(eval LINKERFILE := $(BUILD_DIR)/bl$(1).ld)
    512 	$(eval MAPFILE    := $(BUILD_DIR)/bl$(1).map)
    513 	$(eval ELF        := $(BUILD_DIR)/bl$(1).elf)
    514 	$(eval DUMP       := $(BUILD_DIR)/bl$(1).dump)
    515 	$(eval BIN        := $(BUILD_PLAT)/bl$(1).bin)
    516 
    517 	$(eval $(call MAKE_OBJS,$(BUILD_DIR),$(SOURCES),$(1)))
    518 	$(eval $(call MAKE_LD,$(LINKERFILE),$(BL$(1)_LINKERFILE)))
    519 
    520 $(BUILD_DIR) :
    521 	$$(Q)mkdir -p "$$@"
    522 
    523 $(ELF) : $(OBJS) $(LINKERFILE)
    524 	@echo "  LD      $$@"
    525 	@echo 'const char build_message[] = "Built : "__TIME__", "__DATE__; \
    526 	       const char version_string[] = "${VERSION_STRING}";' | \
    527 		$$(CC) $$(CFLAGS) -xc - -o $(BUILD_DIR)/build_message.o
    528 	$$(Q)$$(LD) -o $$@ $$(LDFLAGS) -Map=$(MAPFILE) --script $(LINKERFILE) \
    529 					$(BUILD_DIR)/build_message.o $(OBJS)
    530 
    531 $(DUMP) : $(ELF)
    532 	@echo "  OD      $$@"
    533 	$${Q}$${OD} -dx $$< > $$@
    534 
    535 $(BIN) : $(ELF)
    536 	@echo "  BIN     $$@"
    537 	$$(Q)$$(OC) -O binary $$< $$@
    538 	@echo
    539 	@echo "Built $$@ successfully"
    540 	@echo
    541 
    542 .PHONY : bl$(1)
    543 bl$(1) : $(BUILD_DIR) $(BIN) $(DUMP)
    544 
    545 all : bl$(1)
    546 
    547 $(eval $(call MAKE_TOOL_ARGS,$(1),$(BIN),$(2),$(3),$(4),$(5)))
    548 
    549 endef
    550 
    551 
    552 ifeq (${NEED_BL1},yes)
    553 $(eval $(call MAKE_BL,1))
    554 endif
    555 
    556 ifeq (${NEED_BL2},yes)
    557 $(if ${BL2}, $(eval $(call MAKE_TOOL_ARGS,2,${BL2},in_fip,${CERTS})),\
    558 	$(eval $(call MAKE_BL,2,in_fip,${CERTS})))
    559 endif
    560 
    561 ifeq (${NEED_BL31},yes)
    562 BL31_SOURCES += ${SPD_SOURCES}
    563 $(if ${BL31}, $(eval $(call MAKE_TOOL_ARGS,31,${BL31},in_fip,${CERTS},${CERTS},${BL31_KEY})),\
    564 	$(eval $(call MAKE_BL,31,in_fip,${CERTS},${CERTS},${BL31_KEY})))
    565 endif
    566 
    567 ifeq (${NEED_BL32},yes)
    568 $(if ${BL32}, $(eval $(call MAKE_TOOL_ARGS,32,${BL32},in_fip,${CERTS},${CERTS},${BL32_KEY})),\
    569 	$(eval $(call MAKE_BL,32,in_fip,${CERTS},${CERTS},${BL32_KEY})))
    570 endif
    571 
    572 ifeq (${NEED_BL30},yes)
    573 $(if ${BL30}, $(eval $(call MAKE_TOOL_ARGS,30,${BL30},in_fip,${CERTS},${CERTS},${BL30_KEY})))
    574 
    575 # If BL3-0 is needed by the platform then 'BL30' variable must be defined.
    576 check_bl30:
    577 	$(if ${BL30},,$(error "To build a FIP for platform ${PLAT}, please set BL30 to point to the SCP firmware"))
    578 else
    579 
    580 # If BL3-0 is not needed by the platform but the user still specified the path
    581 # to a BL3-0 image then warn him that it will be ignored.
    582 check_bl30:
    583 	$(if ${BL30},$(warning "BL3-0 is not supported on platform ${PLAT}, it will just be ignored"),)
    584 endif
    585 
    586 ifeq (${NEED_BL33},yes)
    587 $(if ${BL33}, $(eval $(call MAKE_TOOL_ARGS,33,${BL33},in_fip,${CERTS},${CERTS},${BL33_KEY})))
    588 
    589 # If BL3-3 is needed by the platform then 'BL33' variable must be defined.
    590 check_bl33:
    591 	$(if ${BL33},,$(error "To build a FIP, please set BL33 to point to the Normal World binary, eg: BL33=../uefi/FVP_AARCH64_EFI.fd"))
    592 else
    593 
    594 # If BL3-3 is not needed by the platform but the user still specified the path
    595 # to a BL3-3 image then warn him that it will be ignored.
    596 check_bl33:
    597 	$(if ${BL33},$(warning "BL3-3 is not supported on platform ${PLAT}, it will just be ignored"),)
    598 endif
    599 
    600 # Add the dependency on the certificates
    601 ifneq (${GENERATE_COT},0)
    602     all: certificates
    603 endif
    604 
    605 certificates: ${CRT_DEPS} ${CRTTOOL} check_bl30 check_bl33
    606 			${Q}${CRTTOOL} ${CRT_ARGS}
    607 			@echo
    608 			@echo "Built $@ successfully"
    609 			@echo "Certificates can be found in ${BUILD_PLAT}"
    610 			@echo
    611 
    612 ${BUILD_PLAT}/${FIP_NAME}: ${FIP_DEPS} ${FIPTOOL} check_bl30 check_bl33
    613 			${Q}${FIPTOOL} --dump \
    614 				${FIP_ARGS} \
    615 				$@
    616 			@echo
    617 			@echo "Built $@ successfully"
    618 			@echo
    619 
    620 
    621 cscope:
    622 	@echo "  CSCOPE"
    623 	${Q}find ${CURDIR} -name "*.[chsS]" > cscope.files
    624 	${Q}cscope -b -q -k
    625 
    626 help:
    627 	@echo "usage: ${MAKE} PLAT=<${HELP_PLATFORMS}> <all|bl1|bl2|bl31|distclean|clean|checkcodebase|checkpatch>"
    628 	@echo ""
    629 	@echo "PLAT is used to specify which platform you wish to build."
    630 	@echo "If no platform is specified, PLAT defaults to: ${DEFAULT_PLAT}"
    631 	@echo ""
    632 	@echo "Supported Targets:"
    633 	@echo "  all            Build the BL1, BL2 and BL31 binaries"
    634 	@echo "  bl1            Build the BL1 binary"
    635 	@echo "  bl2            Build the BL2 binary"
    636 	@echo "  bl31           Build the BL31 binary"
    637 	@echo "  checkcodebase  Check the coding style of the entire source tree"
    638 	@echo "  checkpatch     Check the coding style on changes in the current"
    639 	@echo "                 branch against BASE_COMMIT (default origin/master)"
    640 	@echo "  clean          Clean the build for the selected platform"
    641 	@echo "  cscope         Generate cscope index"
    642 	@echo "  distclean      Remove all build artifacts for all platforms"
    643 	@echo "  certtool       Build the Certificate generation tool"
    644 	@echo "  fiptool        Build the Firmware Image Package(FIP) creation tool"
    645 	@echo ""
    646 	@echo "note: most build targets require PLAT to be set to a specific platform."
    647 	@echo ""
    648 	@echo "example: build all targets for the FVP platform:"
    649 	@echo "  CROSS_COMPILE=aarch64-none-elf- make PLAT=fvp all"
    650