1# 2# Copyright (c) 2013-2015, 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# 34VERSION_MAJOR := 1 35VERSION_MINOR := 1 36 37# Default goal is build all images 38.DEFAULT_GOAL := all 39 40include make_helpers/build_macros.mk 41 42################################################################################ 43# Default values for build configurations 44################################################################################ 45 46# Build verbosity 47V := 0 48# Debug build 49DEBUG := 0 50# Build platform 51DEFAULT_PLAT := fvp 52PLAT := ${DEFAULT_PLAT} 53# SPD choice 54SPD := none 55# Base commit to perform code check on 56BASE_COMMIT := origin/master 57# NS timer register save and restore 58NS_TIMER_SWITCH := 0 59# By default, Bl1 acts as the reset handler, not BL31 60RESET_TO_BL31 := 0 61# Include FP registers in cpu context 62CTX_INCLUDE_FPREGS := 0 63# Determine the version of ARM GIC architecture to use for interrupt management 64# in EL3. The platform port can change this value if needed. 65ARM_GIC_ARCH := 2 66# Determine the version of ARM CCI product used in the platform. The platform 67# port can change this value if needed. 68ARM_CCI_PRODUCT_ID := 400 69# Flag used to indicate if ASM_ASSERTION should be enabled for the build. 70# This defaults to being present in DEBUG builds only. 71ASM_ASSERTION := ${DEBUG} 72# Build option to choose whether Trusted firmware uses Coherent memory or not. 73USE_COHERENT_MEM := 1 74# Flag used to choose the power state format viz Extended State-ID or the Original 75# format. 76PSCI_EXTENDED_STATE_ID := 0 77# Default FIP file name 78FIP_NAME := fip.bin 79# By default, use the -pedantic option in the gcc command line 80DISABLE_PEDANTIC := 0 81# Flags to generate the Chain of Trust 82GENERATE_COT := 0 83CREATE_KEYS := 1 84SAVE_KEYS := 0 85# Flags to build TF with Trusted Boot support 86TRUSTED_BOARD_BOOT := 0 87# By default, consider that the platform's reset address is not programmable. 88# The platform Makefile is free to override this value. 89PROGRAMMABLE_RESET_ADDRESS := 0 90# Build flag to treat usage of deprecated platform and framework APIs as error. 91ERROR_DEPRECATED := 0 92# By default, consider that the platform may release several CPUs out of reset. 93# The platform Makefile is free to override this value. 94COLD_BOOT_SINGLE_CPU := 0 95# Flag to introduce an infinite loop in BL1 just before it exits into the next 96# image. This is meant to help debugging the post-BL2 phase. 97SPIN_ON_BL1_EXIT := 0 98 99 100################################################################################ 101# Checkpatch script options 102################################################################################ 103 104CHECK_IGNORE := --ignore COMPLEX_MACRO \ 105 --ignore GERRIT_CHANGE_ID \ 106 --ignore GIT_COMMIT_ID 107CHECKPATCH_ARGS := --no-tree --no-signoff ${CHECK_IGNORE} 108CHECKCODE_ARGS := --no-patch --no-tree --no-signoff ${CHECK_IGNORE} 109# Do not check the coding style on C library files 110CHECK_PATHS := $(shell ls -I include -I lib) \ 111 $(addprefix include/,$(shell ls -I stdlib include)) \ 112 $(addprefix lib/,$(shell ls -I stdlib lib)) 113 114 115################################################################################ 116# Process build options 117################################################################################ 118 119# Verbose flag 120ifeq (${V},0) 121 Q=@ 122 CHECKCODE_ARGS += --no-summary --terse 123else 124 Q= 125endif 126export Q 127 128# Process Debug flag 129$(eval $(call add_define,DEBUG)) 130ifneq (${DEBUG}, 0) 131 BUILD_TYPE := debug 132 CFLAGS += -g 133 ASFLAGS += -g -Wa,--gdwarf-2 134 # Use LOG_LEVEL_INFO by default for debug builds 135 LOG_LEVEL := 40 136else 137 BUILD_TYPE := release 138 $(eval $(call add_define,NDEBUG)) 139 # Use LOG_LEVEL_NOTICE by default for release builds 140 LOG_LEVEL := 20 141endif 142 143# Default build string (git branch and commit) 144ifeq (${BUILD_STRING},) 145 BUILD_STRING := $(shell git log -n 1 --pretty=format:"%h") 146endif 147VERSION_STRING := v${VERSION_MAJOR}.${VERSION_MINOR}(${BUILD_TYPE}):${BUILD_STRING} 148 149# The cert_create tool cannot generate certificates individually, so we use the 150# target 'certificates' to create them all 151ifneq (${GENERATE_COT},0) 152 FIP_DEPS += certificates 153endif 154 155 156################################################################################ 157# Toolchain 158################################################################################ 159 160CC := ${CROSS_COMPILE}gcc 161CPP := ${CROSS_COMPILE}cpp 162AS := ${CROSS_COMPILE}gcc 163AR := ${CROSS_COMPILE}ar 164LD := ${CROSS_COMPILE}ld 165OC := ${CROSS_COMPILE}objcopy 166OD := ${CROSS_COMPILE}objdump 167NM := ${CROSS_COMPILE}nm 168PP := ${CROSS_COMPILE}gcc -E 169 170ASFLAGS += -nostdinc -ffreestanding -Wa,--fatal-warnings \ 171 -Werror -Wmissing-include-dirs \ 172 -mgeneral-regs-only -D__ASSEMBLY__ \ 173 ${DEFINES} ${INCLUDES} 174CFLAGS += -nostdinc -ffreestanding -Wall \ 175 -Werror -Wmissing-include-dirs \ 176 -mgeneral-regs-only -mstrict-align \ 177 -std=c99 -c -Os \ 178 ${DEFINES} ${INCLUDES} 179CFLAGS += -ffunction-sections -fdata-sections 180 181LDFLAGS += --fatal-warnings -O1 182LDFLAGS += --gc-sections 183 184 185################################################################################ 186# Common sources and include directories 187################################################################################ 188 189BL_COMMON_SOURCES += common/bl_common.c \ 190 common/tf_printf.c \ 191 common/aarch64/debug.S \ 192 lib/aarch64/cache_helpers.S \ 193 lib/aarch64/misc_helpers.S \ 194 lib/aarch64/xlat_helpers.c \ 195 lib/stdlib/std.c \ 196 plat/common/aarch64/platform_helpers.S 197 198INCLUDES += -Iinclude/bl1 \ 199 -Iinclude/bl31 \ 200 -Iinclude/bl31/services \ 201 -Iinclude/common \ 202 -Iinclude/drivers \ 203 -Iinclude/drivers/arm \ 204 -Iinclude/drivers/auth \ 205 -Iinclude/drivers/io \ 206 -Iinclude/drivers/ti/uart \ 207 -Iinclude/lib \ 208 -Iinclude/lib/aarch64 \ 209 -Iinclude/lib/cpus/aarch64 \ 210 -Iinclude/plat/common \ 211 -Iinclude/stdlib \ 212 -Iinclude/stdlib/sys \ 213 ${PLAT_INCLUDES} \ 214 ${SPD_INCLUDES} 215 216 217################################################################################ 218# Generic definitions 219################################################################################ 220 221BUILD_BASE := ./build 222BUILD_PLAT := ${BUILD_BASE}/${PLAT}/${BUILD_TYPE} 223 224PLAT_MAKEFILE := platform.mk 225# Generate the platforms list by recursively searching for all directories 226# under /plat containing a PLAT_MAKEFILE. Append each platform with a `|` 227# char and strip out the final '|'. 228PLATFORMS := $(shell find plat/ -name '${PLAT_MAKEFILE}' -print0 | \ 229 sed -r 's%[^\x00]*\/([^/]*)\/${PLAT_MAKEFILE}\x00%\1|%g' | \ 230 sed -r 's/\|$$//') 231SPDS := $(shell ls -I none services/spd) 232 233# Platforms providing their own TBB makefile may override this value 234INCLUDE_TBBR_MK := 1 235 236 237################################################################################ 238# Include SPD Makefile if one has been specified 239################################################################################ 240 241ifneq (${SPD},none) 242ifdef EL3_PAYLOAD_BASE 243 $(warning "SPD and EL3_PAYLOAD_BASE are incompatible build options.") 244 $(warning "The SPD and its BL32 companion will be present but ignored.") 245endif 246 # We expect to locate an spd.mk under the specified SPD directory 247 SPD_MAKE := $(shell m="services/spd/${SPD}/${SPD}.mk"; [ -f "$$m" ] && echo "$$m") 248 249 ifeq (${SPD_MAKE},) 250 $(error Error: No services/spd/${SPD}/${SPD}.mk located) 251 endif 252 $(info Including ${SPD_MAKE}) 253 include ${SPD_MAKE} 254 255 # If there's BL32 companion for the chosen SPD, we expect that the SPD's 256 # Makefile would set NEED_BL32 to "yes". In this case, the build system 257 # supports two mutually exclusive options: 258 # * BL32 is built from source: then BL32_SOURCES must contain the list 259 # of source files to build BL32 260 # * BL32 is a prebuilt binary: then BL32 must point to the image file 261 # that will be included in the FIP 262 # If both BL32_SOURCES and BL32 are defined, the binary takes precedence 263 # over the sources. 264endif 265 266 267################################################################################ 268# Include the platform specific Makefile after the SPD Makefile (the platform 269# makefile may use all previous definitions in this file) 270################################################################################ 271 272ifeq (${PLAT},) 273 $(error "Error: Unknown platform. Please use PLAT=<platform name> to specify the platform") 274endif 275PLAT_MAKEFILE_FULL := $(shell find plat/ -wholename '*/${PLAT}/${PLAT_MAKEFILE}') 276ifeq ($(PLAT_MAKEFILE_FULL),) 277 $(error "Error: Invalid platform. The following platforms are available: ${PLATFORMS}") 278endif 279 280include ${PLAT_MAKEFILE_FULL} 281 282# If the platform has not defined ENABLE_PLAT_COMPAT, then enable it by default 283ifndef ENABLE_PLAT_COMPAT 284ENABLE_PLAT_COMPAT := 1 285endif 286 287# Include the platform compatibility helpers for PSCI 288ifneq (${ENABLE_PLAT_COMPAT}, 0) 289include plat/compat/plat_compat.mk 290endif 291 292# Include the CPU specific operations makefile. By default all CPU errata 293# workarounds and CPU specifc optimisations are disabled. This can be 294# overridden by the platform. 295include lib/cpus/cpu-ops.mk 296 297 298################################################################################ 299# Process platform overrideable behaviour 300################################################################################ 301 302# Check if -pedantic option should be used 303ifeq (${DISABLE_PEDANTIC},0) 304 CFLAGS += -pedantic 305endif 306 307# Using the ARM Trusted Firmware BL2 implies that a BL3-3 image also need to be 308# supplied for the FIP and Certificate generation tools. This flag can be 309# overridden by the platform. 310ifdef BL2_SOURCES 311ifndef EL3_PAYLOAD_BASE 312NEED_BL33 ?= yes 313else 314# The BL33 image is not needed when booting an EL3 payload. 315NEED_BL33 := no 316endif 317endif 318 319# Process TBB related flags 320ifneq (${GENERATE_COT},0) 321 # Common cert_create options 322 ifneq (${CREATE_KEYS},0) 323 $(eval CRT_ARGS += -n) 324 ifneq (${SAVE_KEYS},0) 325 $(eval CRT_ARGS += -k) 326 endif 327 endif 328 # Include TBBR makefile (unless the platform indicates otherwise) 329 ifeq (${INCLUDE_TBBR_MK},1) 330 include make_helpers/tbbr/tbbr_tools.mk 331 endif 332endif 333 334 335################################################################################ 336# Auxiliary tools (fip_create, cert_create, etc) 337################################################################################ 338 339# Variables for use with Certificate Generation Tool 340CRTTOOLPATH ?= tools/cert_create 341CRTTOOL ?= ${CRTTOOLPATH}/cert_create 342 343# Variables for use with Firmware Image Package 344FIPTOOLPATH ?= tools/fip_create 345FIPTOOL ?= ${FIPTOOLPATH}/fip_create 346 347 348################################################################################ 349# Build options checks 350################################################################################ 351 352$(eval $(call assert_boolean,DEBUG)) 353$(eval $(call assert_boolean,NS_TIMER_SWITCH)) 354$(eval $(call assert_boolean,RESET_TO_BL31)) 355$(eval $(call assert_boolean,CTX_INCLUDE_FPREGS)) 356$(eval $(call assert_boolean,ASM_ASSERTION)) 357$(eval $(call assert_boolean,USE_COHERENT_MEM)) 358$(eval $(call assert_boolean,DISABLE_PEDANTIC)) 359$(eval $(call assert_boolean,GENERATE_COT)) 360$(eval $(call assert_boolean,CREATE_KEYS)) 361$(eval $(call assert_boolean,SAVE_KEYS)) 362$(eval $(call assert_boolean,TRUSTED_BOARD_BOOT)) 363$(eval $(call assert_boolean,PROGRAMMABLE_RESET_ADDRESS)) 364$(eval $(call assert_boolean,COLD_BOOT_SINGLE_CPU)) 365$(eval $(call assert_boolean,PSCI_EXTENDED_STATE_ID)) 366$(eval $(call assert_boolean,ERROR_DEPRECATED)) 367$(eval $(call assert_boolean,ENABLE_PLAT_COMPAT)) 368$(eval $(call assert_boolean,SPIN_ON_BL1_EXIT)) 369 370 371################################################################################ 372# Add definitions to the cpp preprocessor based on the current build options. 373# This is done after including the platform specific makefile to allow the 374# platform to overwrite the default options 375################################################################################ 376 377$(eval $(call add_define,PLAT_${PLAT})) 378$(eval $(call add_define,NS_TIMER_SWITCH)) 379$(eval $(call add_define,RESET_TO_BL31)) 380$(eval $(call add_define,CTX_INCLUDE_FPREGS)) 381$(eval $(call add_define,ARM_GIC_ARCH)) 382$(eval $(call add_define,ARM_CCI_PRODUCT_ID)) 383$(eval $(call add_define,ASM_ASSERTION)) 384$(eval $(call add_define,LOG_LEVEL)) 385$(eval $(call add_define,USE_COHERENT_MEM)) 386$(eval $(call add_define,TRUSTED_BOARD_BOOT)) 387$(eval $(call add_define,PROGRAMMABLE_RESET_ADDRESS)) 388$(eval $(call add_define,COLD_BOOT_SINGLE_CPU)) 389$(eval $(call add_define,PSCI_EXTENDED_STATE_ID)) 390$(eval $(call add_define,ERROR_DEPRECATED)) 391$(eval $(call add_define,ENABLE_PLAT_COMPAT)) 392$(eval $(call add_define,SPIN_ON_BL1_EXIT)) 393# Define the EL3_PAYLOAD_BASE flag only if it is provided. 394ifdef EL3_PAYLOAD_BASE 395$(eval $(call add_define,EL3_PAYLOAD_BASE)) 396endif 397 398 399################################################################################ 400# Include BL specific makefiles 401################################################################################ 402 403ifdef BL1_SOURCES 404NEED_BL1 := yes 405include bl1/bl1.mk 406endif 407 408ifdef BL2_SOURCES 409NEED_BL2 := yes 410include bl2/bl2.mk 411endif 412 413ifdef BL2U_SOURCES 414NEED_BL2U := yes 415include bl2u/bl2u.mk 416endif 417 418ifdef BL31_SOURCES 419# When booting an EL3 payload, there is no need to compile the BL31 image nor 420# put it in the FIP. 421ifndef EL3_PAYLOAD_BASE 422NEED_BL31 := yes 423include bl31/bl31.mk 424endif 425endif 426 427 428################################################################################ 429# Build targets 430################################################################################ 431 432.PHONY: all msg_start clean realclean distclean cscope locate-checkpatch checkcodebase checkpatch fiptool fip certtool 433.SUFFIXES: 434 435all: msg_start 436 437msg_start: 438 @echo "Building ${PLAT}" 439 440# Check if deprecated declarations should be treated as error or not. 441ifeq (${ERROR_DEPRECATED},0) 442 CFLAGS += -Wno-error=deprecated-declarations 443endif 444 445# Expand build macros for the different images 446ifeq (${NEED_BL1},yes) 447$(eval $(call MAKE_BL,1)) 448endif 449 450ifeq (${NEED_BL2},yes) 451$(if ${BL2}, $(eval $(call MAKE_TOOL_ARGS,2,${BL2},in_fip)),\ 452 $(eval $(call MAKE_BL,2,in_fip))) 453endif 454 455ifeq (${NEED_BL31},yes) 456BL31_SOURCES += ${SPD_SOURCES} 457$(if ${BL31}, $(eval $(call MAKE_TOOL_ARGS,31,${BL31},in_fip)),\ 458 $(eval $(call MAKE_BL,31,in_fip))) 459endif 460 461# If a BL32 image is needed but neither BL32 nor BL32_SOURCES is defined, the 462# build system will call FIP_ADD_IMG to print a warning message and abort the 463# process. Note that the dependency on BL32 applies to the FIP only. 464ifeq (${NEED_BL32},yes) 465$(if ${BL32}, $(eval $(call MAKE_TOOL_ARGS,32,${BL32},in_fip)),\ 466 $(if ${BL32_SOURCES}, $(eval $(call MAKE_BL,32,in_fip)),\ 467 $(eval $(call FIP_ADD_IMG,BL32,--bl32)))) 468endif 469 470# Add the BL33 image if required by the platform 471ifeq (${NEED_BL33},yes) 472$(eval $(call FIP_ADD_IMG,BL33,--bl33)) 473endif 474 475ifeq (${NEED_BL2U},yes) 476BL2U_PATH := $(if ${BL2U},${BL2U},$(call IMG_BIN,2u)) 477$(if ${BL2U}, ,$(eval $(call MAKE_BL,2u))) 478$(eval $(call FWU_FIP_ADD_PAYLOAD,${BL2U_PATH},--bl2u)) 479endif 480 481locate-checkpatch: 482ifndef CHECKPATCH 483 $(error "Please set CHECKPATCH to point to the Linux checkpatch.pl file, eg: CHECKPATCH=../linux/script/checkpatch.pl") 484else 485ifeq (,$(wildcard ${CHECKPATCH})) 486 $(error "The file CHECKPATCH points to cannot be found, use eg: CHECKPATCH=../linux/script/checkpatch.pl") 487endif 488endif 489 490clean: 491 @echo " CLEAN" 492 ${Q}rm -rf ${BUILD_PLAT} 493 ${Q}${MAKE} --no-print-directory -C ${FIPTOOLPATH} clean 494 ${Q}${MAKE} PLAT=${PLAT} --no-print-directory -C ${CRTTOOLPATH} clean 495 496realclean distclean: 497 @echo " REALCLEAN" 498 ${Q}rm -rf ${BUILD_BASE} 499 ${Q}rm -f ${CURDIR}/cscope.* 500 ${Q}${MAKE} --no-print-directory -C ${FIPTOOLPATH} clean 501 ${Q}${MAKE} PLAT=${PLAT} --no-print-directory -C ${CRTTOOLPATH} clean 502 503checkcodebase: locate-checkpatch 504 @echo " CHECKING STYLE" 505 @if test -d .git ; then \ 506 git ls-files | grep -v stdlib | while read GIT_FILE ; do ${CHECKPATCH} ${CHECKCODE_ARGS} -f $$GIT_FILE ; done ; \ 507 else \ 508 find . -type f -not -iwholename "*.git*" -not -iwholename "*build*" -not -iwholename "*stdlib*" -exec ${CHECKPATCH} ${CHECKCODE_ARGS} -f {} \; ; \ 509 fi 510 511checkpatch: locate-checkpatch 512 @echo " CHECKING STYLE" 513 ${Q}git log -p ${BASE_COMMIT}..HEAD -- ${CHECK_PATHS} | ${CHECKPATCH} ${CHECKPATCH_ARGS} - || true 514 515certtool: ${CRTTOOL} 516 517.PHONY: ${CRTTOOL} 518${CRTTOOL}: 519 ${Q}${MAKE} PLAT=${PLAT} --no-print-directory -C ${CRTTOOLPATH} 520 @echo 521 @echo "Built $@ successfully" 522 @echo 523 524ifneq (${GENERATE_COT},0) 525certificates: ${CRT_DEPS} ${CRTTOOL} 526 ${Q}${CRTTOOL} ${CRT_ARGS} 527 @echo 528 @echo "Built $@ successfully" 529 @echo "Certificates can be found in ${BUILD_PLAT}" 530 @echo 531endif 532 533${BUILD_PLAT}/${FIP_NAME}: ${FIP_DEPS} ${FIPTOOL} 534 ${Q}${FIPTOOL} --dump ${FIP_ARGS} $@ 535 @echo 536 @echo "Built $@ successfully" 537 @echo 538 539fiptool: ${FIPTOOL} 540fip: ${BUILD_PLAT}/${FIP_NAME} 541 542.PHONY: ${FIPTOOL} 543${FIPTOOL}: 544 ${Q}${MAKE} --no-print-directory -C ${FIPTOOLPATH} 545 546cscope: 547 @echo " CSCOPE" 548 ${Q}find ${CURDIR} -name "*.[chsS]" > cscope.files 549 ${Q}cscope -b -q -k 550 551help: 552 @echo "usage: ${MAKE} PLAT=<${PLATFORMS}> [OPTIONS] [TARGET]" 553 @echo "" 554 @echo "PLAT is used to specify which platform you wish to build." 555 @echo "If no platform is specified, PLAT defaults to: ${DEFAULT_PLAT}" 556 @echo "" 557 @echo "Please refer to the User Guide for a list of all supported options." 558 @echo "Note that the build system doesn't track dependencies for build " 559 @echo "options. Therefore, if any of the build options are changed " 560 @echo "from a previous build, a clean build must be performed." 561 @echo "" 562 @echo "Supported Targets:" 563 @echo " all Build all individual bootloader binaries" 564 @echo " bl1 Build the BL1 binary" 565 @echo " bl2 Build the BL2 binary" 566 @echo " bl2u Build the BL2U binary" 567 @echo " bl31 Build the BL3-1 binary" 568 @echo " bl32 Build the BL3-2 binary" 569 @echo " certificates Build the certificates (requires 'GENERATE_COT=1')" 570 @echo " fip Build the Firmware Image Package (FIP)" 571 @echo " checkcodebase Check the coding style of the entire source tree" 572 @echo " checkpatch Check the coding style on changes in the current" 573 @echo " branch against BASE_COMMIT (default origin/master)" 574 @echo " clean Clean the build for the selected platform" 575 @echo " cscope Generate cscope index" 576 @echo " distclean Remove all build artifacts for all platforms" 577 @echo " certtool Build the Certificate generation tool" 578 @echo " fiptool Build the Firmware Image Package(FIP) creation tool" 579 @echo "" 580 @echo "Note: most build targets require PLAT to be set to a specific platform." 581 @echo "" 582 @echo "example: build all targets for the FVP platform:" 583 @echo " CROSS_COMPILE=aarch64-none-elf- make PLAT=fvp all" 584