1# 2# Copyright (c) 2013-2023, Arm Limited and Contributors. All rights reserved. 3# 4# SPDX-License-Identifier: BSD-3-Clause 5# 6 7# 8# Trusted Firmware Version 9# 10VERSION_MAJOR := 2 11VERSION_MINOR := 8 12VERSION := ${VERSION_MAJOR}.${VERSION_MINOR} 13 14# Default goal is build all images 15.DEFAULT_GOAL := all 16 17# Avoid any implicit propagation of command line variable definitions to 18# sub-Makefiles, like CFLAGS that we reserved for the firmware images' 19# usage. Other command line options like "-s" are still propagated as usual. 20MAKEOVERRIDES = 21 22MAKE_HELPERS_DIRECTORY := make_helpers/ 23include ${MAKE_HELPERS_DIRECTORY}build_macros.mk 24include ${MAKE_HELPERS_DIRECTORY}build_env.mk 25 26################################################################################ 27# Default values for build configurations, and their dependencies 28################################################################################ 29 30include ${MAKE_HELPERS_DIRECTORY}defaults.mk 31 32# Assertions enabled for DEBUG builds by default 33ENABLE_ASSERTIONS := ${DEBUG} 34ENABLE_PMF := ${ENABLE_RUNTIME_INSTRUMENTATION} 35PLAT := ${DEFAULT_PLAT} 36 37################################################################################ 38# Checkpatch script options 39################################################################################ 40 41CHECKCODE_ARGS := --no-patch 42# Do not check the coding style on imported library files or documentation files 43INC_ARM_DIRS_TO_CHECK := $(sort $(filter-out \ 44 include/drivers/arm/cryptocell, \ 45 $(wildcard include/drivers/arm/*))) 46INC_ARM_DIRS_TO_CHECK += include/drivers/arm/cryptocell/*.h 47INC_DRV_DIRS_TO_CHECK := $(sort $(filter-out \ 48 include/drivers/arm, \ 49 $(wildcard include/drivers/*))) 50INC_LIB_DIRS_TO_CHECK := $(sort $(filter-out \ 51 include/lib/libfdt \ 52 include/lib/libc, \ 53 $(wildcard include/lib/*))) 54INC_DIRS_TO_CHECK := $(sort $(filter-out \ 55 include/lib \ 56 include/drivers, \ 57 $(wildcard include/*))) 58LIB_DIRS_TO_CHECK := $(sort $(filter-out \ 59 lib/compiler-rt \ 60 lib/libfdt% \ 61 lib/libc, \ 62 lib/zlib \ 63 $(wildcard lib/*))) 64ROOT_DIRS_TO_CHECK := $(sort $(filter-out \ 65 lib \ 66 include \ 67 docs \ 68 %.rst, \ 69 $(wildcard *))) 70CHECK_PATHS := ${ROOT_DIRS_TO_CHECK} \ 71 ${INC_DIRS_TO_CHECK} \ 72 ${INC_LIB_DIRS_TO_CHECK} \ 73 ${LIB_DIRS_TO_CHECK} \ 74 ${INC_DRV_DIRS_TO_CHECK} \ 75 ${INC_ARM_DIRS_TO_CHECK} 76 77 78################################################################################ 79# Process build options 80################################################################################ 81 82# Verbose flag 83ifeq (${V},0) 84 Q:=@ 85 ECHO:=@echo 86 CHECKCODE_ARGS += --no-summary --terse 87else 88 Q:= 89 ECHO:=$(ECHO_QUIET) 90endif 91 92ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) 93 Q:=@ 94 ECHO:=$(ECHO_QUIET) 95endif 96 97export Q ECHO 98 99# The cert_create tool cannot generate certificates individually, so we use the 100# target 'certificates' to create them all 101ifneq (${GENERATE_COT},0) 102 FIP_DEPS += certificates 103 FWU_FIP_DEPS += fwu_certificates 104endif 105 106# Process BRANCH_PROTECTION value and set 107# Pointer Authentication and Branch Target Identification flags 108ifeq (${BRANCH_PROTECTION},0) 109 # Default value turns off all types of branch protection 110 BP_OPTION := none 111else ifneq (${ARCH},aarch64) 112 $(error BRANCH_PROTECTION requires AArch64) 113else ifeq (${BRANCH_PROTECTION},1) 114 # Enables all types of branch protection features 115 BP_OPTION := standard 116 ENABLE_BTI := 1 117 ENABLE_PAUTH := 1 118else ifeq (${BRANCH_PROTECTION},2) 119 # Return address signing to its standard level 120 BP_OPTION := pac-ret 121 ENABLE_PAUTH := 1 122else ifeq (${BRANCH_PROTECTION},3) 123 # Extend the signing to include leaf functions 124 BP_OPTION := pac-ret+leaf 125 ENABLE_PAUTH := 1 126else ifeq (${BRANCH_PROTECTION},4) 127 # Turn on branch target identification mechanism 128 BP_OPTION := bti 129 ENABLE_BTI := 1 130else 131 $(error Unknown BRANCH_PROTECTION value ${BRANCH_PROTECTION}) 132endif 133 134# FEAT_RME 135ifeq (${ENABLE_RME},1) 136# RME doesn't support PIE 137ifneq (${ENABLE_PIE},0) 138 $(error ENABLE_RME does not support PIE) 139endif 140# RME doesn't support BRBE 141ifneq (${ENABLE_BRBE_FOR_NS},0) 142 $(error ENABLE_RME does not support BRBE.) 143endif 144# RME requires AARCH64 145ifneq (${ARCH},aarch64) 146 $(error ENABLE_RME requires AArch64) 147endif 148# RME requires el2 context to be saved for now. 149CTX_INCLUDE_EL2_REGS := 1 150CTX_INCLUDE_AARCH32_REGS := 0 151ARM_ARCH_MAJOR := 8 152ARM_ARCH_MINOR := 5 153ENABLE_FEAT_ECV = 1 154ENABLE_FEAT_FGT = 1 155 156# RME enables CSV2_2 extension by default. 157ENABLE_FEAT_CSV2_2 = 1 158 159endif 160 161# USE_SPINLOCK_CAS requires AArch64 build 162ifeq (${USE_SPINLOCK_CAS},1) 163ifneq (${ARCH},aarch64) 164 $(error USE_SPINLOCK_CAS requires AArch64) 165endif 166endif 167 168# USE_DEBUGFS experimental feature recommended only in debug builds 169ifeq (${USE_DEBUGFS},1) 170ifeq (${DEBUG},1) 171 $(warning DEBUGFS experimental feature is enabled.) 172else 173 $(warning DEBUGFS experimental, recommended in DEBUG builds ONLY) 174endif 175endif 176 177ifneq (${DECRYPTION_SUPPORT},none) 178ENC_ARGS += -f ${FW_ENC_STATUS} 179ENC_ARGS += -k ${ENC_KEY} 180ENC_ARGS += -n ${ENC_NONCE} 181FIP_DEPS += enctool 182FWU_FIP_DEPS += enctool 183endif 184 185################################################################################ 186# Toolchain 187################################################################################ 188 189HOSTCC := gcc 190export HOSTCC 191 192CC := ${CROSS_COMPILE}gcc 193CPP := ${CROSS_COMPILE}cpp 194AS := ${CROSS_COMPILE}gcc 195AR := ${CROSS_COMPILE}ar 196LINKER := ${CROSS_COMPILE}ld 197OC := ${CROSS_COMPILE}objcopy 198OD := ${CROSS_COMPILE}objdump 199NM := ${CROSS_COMPILE}nm 200PP := ${CROSS_COMPILE}gcc -E 201DTC := dtc 202 203# Use ${LD}.bfd instead if it exists (as absolute path or together with $PATH). 204ifneq ($(strip $(wildcard ${LD}.bfd) \ 205 $(foreach dir,$(subst :, ,${PATH}),$(wildcard ${dir}/${LINKER}.bfd))),) 206LINKER := ${LINKER}.bfd 207endif 208 209ifeq (${ARM_ARCH_MAJOR},7) 210target32-directive = -target arm-none-eabi 211# Will set march32-directive from platform configuration 212else 213target32-directive = -target armv8a-none-eabi 214 215# Set the compiler's target architecture profile based on 216# ARM_ARCH_MAJOR ARM_ARCH_MINOR options 217ifeq (${ARM_ARCH_MINOR},0) 218march32-directive = -march=armv${ARM_ARCH_MAJOR}-a 219march64-directive = -march=armv${ARM_ARCH_MAJOR}-a 220else 221march32-directive = -march=armv${ARM_ARCH_MAJOR}.${ARM_ARCH_MINOR}-a 222march64-directive = -march=armv${ARM_ARCH_MAJOR}.${ARM_ARCH_MINOR}-a 223endif 224endif 225 226# Memory tagging is supported in architecture Armv8.5-A AArch64 and onwards 227ifeq ($(ARCH), aarch64) 228# Check if revision is greater than or equal to 8.5 229ifeq "8.5" "$(word 1, $(sort 8.5 $(ARM_ARCH_MAJOR).$(ARM_ARCH_MINOR)))" 230mem_tag_arch_support = yes 231endif 232endif 233 234# Get architecture feature modifiers 235arch-features = ${ARM_ARCH_FEATURE} 236 237# Enable required options for memory stack tagging. 238# Currently, these options are enabled only for clang and armclang compiler. 239ifeq (${SUPPORT_STACK_MEMTAG},yes) 240ifdef mem_tag_arch_support 241# Check for armclang and clang compilers 242ifneq ( ,$(filter $(notdir $(CC)),armclang clang)) 243# Add "memtag" architecture feature modifier if not specified 244ifeq ( ,$(findstring memtag,$(arch-features))) 245arch-features := $(arch-features)+memtag 246endif # memtag 247ifeq ($(notdir $(CC)),armclang) 248TF_CFLAGS += -mmemtag-stack 249else ifeq ($(notdir $(CC)),clang) 250TF_CFLAGS += -fsanitize=memtag 251endif # armclang 252endif # armclang clang 253else 254$(error "Error: stack memory tagging is not supported for architecture \ 255 ${ARCH},armv${ARM_ARCH_MAJOR}.${ARM_ARCH_MINOR}-a") 256endif # mem_tag_arch_support 257endif # SUPPORT_STACK_MEMTAG 258 259# Set the compiler's architecture feature modifiers 260ifneq ($(arch-features), none) 261# Strip "none+" from arch-features 262arch-features := $(subst none+,,$(arch-features)) 263ifeq ($(ARCH), aarch32) 264march32-directive := $(march32-directive)+$(arch-features) 265else 266march64-directive := $(march64-directive)+$(arch-features) 267endif 268# Print features 269$(info Arm Architecture Features specified: $(subst +, ,$(arch-features))) 270endif # arch-features 271 272# Determine if FEAT_RNG is supported 273ENABLE_FEAT_RNG = $(if $(findstring rng,${arch-features}),1,0) 274 275# Determine if FEAT_SB is supported 276ENABLE_FEAT_SB = $(if $(findstring sb,${arch-features}),1,0) 277 278ifneq ($(findstring clang,$(notdir $(CC))),) 279 ifneq ($(findstring armclang,$(notdir $(CC))),) 280 TF_CFLAGS_aarch32 := -target arm-arm-none-eabi $(march32-directive) 281 TF_CFLAGS_aarch64 := -target aarch64-arm-none-eabi $(march64-directive) 282 LD := $(LINKER) 283 else 284 TF_CFLAGS_aarch32 = $(target32-directive) $(march32-directive) 285 TF_CFLAGS_aarch64 := -target aarch64-elf $(march64-directive) 286 LD := $(shell $(CC) --print-prog-name ld.lld) 287 288 AR := $(shell $(CC) --print-prog-name llvm-ar) 289 OD := $(shell $(CC) --print-prog-name llvm-objdump) 290 OC := $(shell $(CC) --print-prog-name llvm-objcopy) 291 endif 292 293 CPP := $(CC) -E $(TF_CFLAGS_$(ARCH)) 294 PP := $(CC) -E $(TF_CFLAGS_$(ARCH)) 295 AS := $(CC) -c -x assembler-with-cpp $(TF_CFLAGS_$(ARCH)) 296else ifneq ($(findstring gcc,$(notdir $(CC))),) 297TF_CFLAGS_aarch32 = $(march32-directive) 298TF_CFLAGS_aarch64 = $(march64-directive) 299ifeq ($(ENABLE_LTO),1) 300 # Enable LTO only for aarch64 301 ifeq (${ARCH},aarch64) 302 LTO_CFLAGS = -flto 303 # Use gcc as a wrapper for the ld, recommended for LTO 304 LINKER := ${CROSS_COMPILE}gcc 305 endif 306endif 307LD = $(LINKER) 308else 309TF_CFLAGS_aarch32 = $(march32-directive) 310TF_CFLAGS_aarch64 = $(march64-directive) 311LD = $(LINKER) 312endif 313 314# Process Debug flag 315$(eval $(call add_define,DEBUG)) 316ifneq (${DEBUG}, 0) 317 BUILD_TYPE := debug 318 TF_CFLAGS += -g -gdwarf-4 319 ASFLAGS += -g -Wa,-gdwarf-4 320 321 # Use LOG_LEVEL_INFO by default for debug builds 322 LOG_LEVEL := 40 323else 324 BUILD_TYPE := release 325 # Use LOG_LEVEL_NOTICE by default for release builds 326 LOG_LEVEL := 20 327endif 328 329# Default build string (git branch and commit) 330ifeq (${BUILD_STRING},) 331 BUILD_STRING := $(shell git describe --always --dirty --tags 2> /dev/null) 332endif 333VERSION_STRING := v${VERSION}(${BUILD_TYPE}):${BUILD_STRING} 334 335ifeq (${AARCH32_INSTRUCTION_SET},A32) 336TF_CFLAGS_aarch32 += -marm 337else ifeq (${AARCH32_INSTRUCTION_SET},T32) 338TF_CFLAGS_aarch32 += -mthumb 339else 340$(error Error: Unknown AArch32 instruction set ${AARCH32_INSTRUCTION_SET}) 341endif 342 343TF_CFLAGS_aarch32 += -mno-unaligned-access 344TF_CFLAGS_aarch64 += -mgeneral-regs-only -mstrict-align 345 346ifneq (${BP_OPTION},none) 347TF_CFLAGS_aarch64 += -mbranch-protection=${BP_OPTION} 348endif 349 350ASFLAGS_aarch32 = $(march32-directive) 351ASFLAGS_aarch64 = $(march64-directive) 352 353# General warnings 354WARNINGS := -Wall -Wmissing-include-dirs -Wunused \ 355 -Wdisabled-optimization -Wvla -Wshadow \ 356 -Wredundant-decls 357# stricter warnings 358WARNINGS += -Wextra -Wno-trigraphs 359# too verbose for generic build 360WARNINGS += -Wno-missing-field-initializers \ 361 -Wno-type-limits -Wno-sign-compare \ 362# on clang this flag gets reset if -Wextra is set after it. No difference on gcc 363WARNINGS += -Wno-unused-parameter 364 365# Additional warnings 366# Level 1 - infrequent warnings we should have none of 367# full -Wextra 368WARNING1 += -Wsign-compare 369WARNING1 += -Wtype-limits 370WARNING1 += -Wmissing-field-initializers 371 372# Level 2 - problematic warnings that we want 373# zlib, compiler-rt, coreboot, and mbdedtls blow up with these 374# TODO: disable just for them and move into default build 375WARNING2 += -Wold-style-definition 376WARNING2 += -Wmissing-prototypes 377WARNING2 += -Wmissing-format-attribute 378# TF-A aims to comply with this eventually. Effort too large at present 379WARNING2 += -Wundef 380# currently very involved and many platforms set this off 381WARNING2 += -Wunused-const-variable=2 382 383# Level 3 - very pedantic, frequently ignored 384WARNING3 := -Wbad-function-cast 385WARNING3 += -Waggregate-return 386WARNING3 += -Wnested-externs 387WARNING3 += -Wcast-align 388WARNING3 += -Wcast-qual 389WARNING3 += -Wconversion 390WARNING3 += -Wpacked 391WARNING3 += -Wpointer-arith 392WARNING3 += -Wswitch-default 393 394# Setting W is quite verbose and most warnings will be pre-existing issues 395# outside of the contributor's control. Don't fail the build on them so warnings 396# can be seen and hopefully addressed 397ifdef W 398ifneq (${W},0) 399E ?= 0 400endif 401endif 402 403ifeq (${W},1) 404WARNINGS += $(WARNING1) 405else ifeq (${W},2) 406WARNINGS += $(WARNING1) $(WARNING2) 407else ifeq (${W},3) 408WARNINGS += $(WARNING1) $(WARNING2) $(WARNING3) 409endif 410 411# Compiler specific warnings 412ifeq ($(findstring clang,$(notdir $(CC))),) 413# not using clang 414WARNINGS += -Wunused-but-set-variable -Wmaybe-uninitialized \ 415 -Wpacked-bitfield-compat -Wshift-overflow=2 \ 416 -Wlogical-op 417else 418# using clang 419WARNINGS += -Wshift-overflow -Wshift-sign-overflow \ 420 -Wlogical-op-parentheses 421endif 422 423ifneq (${E},0) 424ERRORS := -Werror 425endif 426 427CPPFLAGS = ${DEFINES} ${INCLUDES} ${MBEDTLS_INC} -nostdinc \ 428 $(ERRORS) $(WARNINGS) 429ASFLAGS += $(CPPFLAGS) $(ASFLAGS_$(ARCH)) \ 430 -ffreestanding -Wa,--fatal-warnings 431TF_CFLAGS += $(CPPFLAGS) $(TF_CFLAGS_$(ARCH)) \ 432 -ffunction-sections -fdata-sections \ 433 -ffreestanding -fno-builtin -fno-common \ 434 -Os -std=gnu99 435 436$(eval $(call add_define,SVE_VECTOR_LEN)) 437 438ifeq (${SANITIZE_UB},on) 439TF_CFLAGS += -fsanitize=undefined -fno-sanitize-recover 440endif 441ifeq (${SANITIZE_UB},trap) 442TF_CFLAGS += -fsanitize=undefined -fno-sanitize-recover \ 443 -fsanitize-undefined-trap-on-error 444endif 445 446GCC_V_OUTPUT := $(shell $(CC) -v 2>&1) 447 448TF_LDFLAGS += -z noexecstack 449 450# LD = armlink 451ifneq ($(findstring armlink,$(notdir $(LD))),) 452TF_LDFLAGS += --diag_error=warning --lto_level=O1 453TF_LDFLAGS += --remove --info=unused,unusedsymbols 454TF_LDFLAGS += $(TF_LDFLAGS_$(ARCH)) 455 456# LD = gcc (used when GCC LTO is enabled) 457else ifneq ($(findstring gcc,$(notdir $(LD))),) 458# Pass ld options with Wl or Xlinker switches 459TF_LDFLAGS += -Wl,--fatal-warnings -O1 460TF_LDFLAGS += -Wl,--gc-sections 461 462TF_LDFLAGS += -Wl,-z,common-page-size=4096 # Configure page size constants 463TF_LDFLAGS += -Wl,-z,max-page-size=4096 464 465ifeq ($(ENABLE_LTO),1) 466 ifeq (${ARCH},aarch64) 467 TF_LDFLAGS += -flto -fuse-linker-plugin 468 endif 469endif 470# GCC automatically adds fix-cortex-a53-843419 flag when used to link 471# which breaks some builds, so disable if errata fix is not explicitly enabled 472ifneq (${ERRATA_A53_843419},1) 473 TF_LDFLAGS += -mno-fix-cortex-a53-843419 474endif 475TF_LDFLAGS += -nostdlib 476TF_LDFLAGS += $(subst --,-Xlinker --,$(TF_LDFLAGS_$(ARCH))) 477 478# LD = gcc-ld (ld) or llvm-ld (ld.lld) or other 479else 480# With ld.bfd version 2.39 and newer new warnings are added. Skip those since we 481# are not loaded by a elf loader. 482TF_LDFLAGS += $(call ld_option, --no-warn-rwx-segments) 483TF_LDFLAGS += -O1 484TF_LDFLAGS += --gc-sections 485 486TF_LDFLAGS += -z common-page-size=4096 # Configure page size constants 487TF_LDFLAGS += -z max-page-size=4096 488 489# ld.lld doesn't recognize the errata flags, 490# therefore don't add those in that case. 491# ld.lld reports section type mismatch warnings, 492# therefore don't add --fatal-warnings to it. 493ifeq ($(findstring ld.lld,$(notdir $(LD))),) 494TF_LDFLAGS += $(TF_LDFLAGS_$(ARCH)) --fatal-warnings 495endif 496endif 497 498DTC_FLAGS += -I dts -O dtb 499DTC_CPPFLAGS += -P -nostdinc -Iinclude -Ifdts -undef \ 500 -x assembler-with-cpp $(DEFINES) 501 502################################################################################ 503# Common sources and include directories 504################################################################################ 505include ${MAKE_HELPERS_DIRECTORY}arch_features.mk 506include lib/compiler-rt/compiler-rt.mk 507 508BL_COMMON_SOURCES += common/bl_common.c \ 509 common/tf_log.c \ 510 common/${ARCH}/debug.S \ 511 drivers/console/multi_console.c \ 512 lib/${ARCH}/cache_helpers.S \ 513 lib/${ARCH}/misc_helpers.S \ 514 plat/common/plat_bl_common.c \ 515 plat/common/plat_log_common.c \ 516 plat/common/${ARCH}/plat_common.c \ 517 plat/common/${ARCH}/platform_helpers.S \ 518 ${COMPILER_RT_SRCS} 519 520ifeq ($(notdir $(CC)),armclang) 521BL_COMMON_SOURCES += lib/${ARCH}/armclang_printf.S 522endif 523 524ifeq (${SANITIZE_UB},on) 525BL_COMMON_SOURCES += plat/common/ubsan.c 526endif 527 528INCLUDES += -Iinclude \ 529 -Iinclude/arch/${ARCH} \ 530 -Iinclude/lib/cpus/${ARCH} \ 531 -Iinclude/lib/el3_runtime/${ARCH} \ 532 ${PLAT_INCLUDES} \ 533 ${SPD_INCLUDES} 534 535include common/backtrace/backtrace.mk 536 537################################################################################ 538# Generic definitions 539################################################################################ 540 541include ${MAKE_HELPERS_DIRECTORY}plat_helpers.mk 542 543ifeq (${BUILD_BASE},) 544 BUILD_BASE := ./build 545endif 546BUILD_PLAT := $(abspath ${BUILD_BASE})/${PLAT}/${BUILD_TYPE} 547 548SPDS := $(sort $(filter-out none, $(patsubst services/spd/%,%,$(wildcard services/spd/*)))) 549 550# Platforms providing their own TBB makefile may override this value 551INCLUDE_TBBR_MK := 1 552 553 554################################################################################ 555# Include SPD Makefile if one has been specified 556################################################################################ 557 558ifneq (${SPD},none) 559 ifeq (${ARCH},aarch32) 560 $(error "Error: SPD is incompatible with AArch32.") 561 endif 562 563 ifdef EL3_PAYLOAD_BASE 564 $(warning "SPD and EL3_PAYLOAD_BASE are incompatible build options.") 565 $(warning "The SPD and its BL32 companion will be present but ignored.") 566 endif 567 568 ifeq (${SPD},spmd) 569 # SPMD is located in std_svc directory 570 SPD_DIR := std_svc 571 572 ifeq ($(SPMD_SPM_AT_SEL2),1) 573 CTX_INCLUDE_EL2_REGS := 1 574 ifeq ($(SPMC_AT_EL3),1) 575 $(error SPM cannot be enabled in both S-EL2 and EL3.) 576 endif 577 endif 578 579 ifeq ($(findstring optee_sp,$(ARM_SPMC_MANIFEST_DTS)),optee_sp) 580 DTC_CPPFLAGS += -DOPTEE_SP_FW_CONFIG 581 endif 582 583 ifeq ($(TS_SP_FW_CONFIG),1) 584 DTC_CPPFLAGS += -DTS_SP_FW_CONFIG 585 endif 586 587 ifneq ($(ARM_BL2_SP_LIST_DTS),) 588 DTC_CPPFLAGS += -DARM_BL2_SP_LIST_DTS=$(ARM_BL2_SP_LIST_DTS) 589 endif 590 591 ifneq ($(SP_LAYOUT_FILE),) 592 BL2_ENABLE_SP_LOAD := 1 593 endif 594 else 595 # All other SPDs in spd directory 596 SPD_DIR := spd 597 endif 598 599 # We expect to locate an spd.mk under the specified SPD directory 600 SPD_MAKE := $(wildcard services/${SPD_DIR}/${SPD}/${SPD}.mk) 601 602 ifeq (${SPD_MAKE},) 603 $(error Error: No services/${SPD_DIR}/${SPD}/${SPD}.mk located) 604 endif 605 $(info Including ${SPD_MAKE}) 606 include ${SPD_MAKE} 607 608 # If there's BL32 companion for the chosen SPD, we expect that the SPD's 609 # Makefile would set NEED_BL32 to "yes". In this case, the build system 610 # supports two mutually exclusive options: 611 # * BL32 is built from source: then BL32_SOURCES must contain the list 612 # of source files to build BL32 613 # * BL32 is a prebuilt binary: then BL32 must point to the image file 614 # that will be included in the FIP 615 # If both BL32_SOURCES and BL32 are defined, the binary takes precedence 616 # over the sources. 617endif 618 619ifeq (${CTX_INCLUDE_EL2_REGS}, 1) 620ifeq (${SPD},none) 621ifeq (${ENABLE_RME},0) 622 $(error CTX_INCLUDE_EL2_REGS is available only when SPD or RME is enabled) 623endif 624endif 625endif 626 627################################################################################ 628# Include rmmd Makefile if RME is enabled 629################################################################################ 630 631ifneq (${ENABLE_RME},0) 632ifneq (${ARCH},aarch64) 633 $(error ENABLE_RME requires AArch64) 634endif 635ifeq ($(SPMC_AT_EL3),1) 636 $(error SPMC_AT_EL3 and ENABLE_RME cannot both be enabled.) 637endif 638include services/std_svc/rmmd/rmmd.mk 639$(warning "RME is an experimental feature") 640endif 641 642################################################################################ 643# Include the platform specific Makefile after the SPD Makefile (the platform 644# makefile may use all previous definitions in this file) 645################################################################################ 646 647include ${PLAT_MAKEFILE_FULL} 648 649# This internal flag is common option which is set to 1 for scenarios 650# when the BL2 is running in EL3 level. This occurs in two scenarios - 651# 4 world system running BL2 at EL3 and two world system without BL1 running 652# BL2 in EL3 653 654ifeq (${RESET_TO_BL2},1) 655 BL2_RUNS_AT_EL3 := 1 656 ifeq (${ENABLE_RME},1) 657 $(error RESET_TO_BL2=1 and ENABLE_RME=1 configuration is not supported at the moment.) 658 endif 659else ifeq (${ENABLE_RME},1) 660 BL2_RUNS_AT_EL3 := 1 661else 662 BL2_RUNS_AT_EL3 := 0 663endif 664 665$(eval $(call MAKE_PREREQ_DIR,${BUILD_PLAT})) 666 667ifeq (${ARM_ARCH_MAJOR},7) 668include make_helpers/armv7-a-cpus.mk 669endif 670 671PIE_FOUND := $(findstring --enable-default-pie,${GCC_V_OUTPUT}) 672ifneq ($(PIE_FOUND),) 673 TF_CFLAGS += -fno-PIE 674ifneq ($(findstring gcc,$(notdir $(LD))),) 675 TF_LDFLAGS += -no-pie 676endif 677endif 678 679ifneq ($(findstring gcc,$(notdir $(LD))),) 680 PIE_LDFLAGS += -Wl,-pie -Wl,--no-dynamic-linker 681else 682 PIE_LDFLAGS += -pie --no-dynamic-linker 683endif 684 685ifeq ($(ENABLE_PIE),1) 686ifeq ($(RESET_TO_BL2),1) 687ifneq ($(BL2_IN_XIP_MEM),1) 688 BL2_CPPFLAGS += -fpie 689 BL2_CFLAGS += -fpie 690 BL2_LDFLAGS += $(PIE_LDFLAGS) 691endif 692endif 693 BL31_CPPFLAGS += -fpie 694 BL31_CFLAGS += -fpie 695 BL31_LDFLAGS += $(PIE_LDFLAGS) 696 697 BL32_CPPFLAGS += -fpie 698 BL32_CFLAGS += -fpie 699 BL32_LDFLAGS += $(PIE_LDFLAGS) 700endif 701 702ifeq (${ARCH},aarch64) 703BL1_CPPFLAGS += -DIMAGE_AT_EL3 704ifeq ($(RESET_TO_BL2),1) 705BL2_CPPFLAGS += -DIMAGE_AT_EL3 706else 707BL2_CPPFLAGS += -DIMAGE_AT_EL1 708endif 709BL2U_CPPFLAGS += -DIMAGE_AT_EL1 710BL31_CPPFLAGS += -DIMAGE_AT_EL3 711BL32_CPPFLAGS += -DIMAGE_AT_EL1 712endif 713 714# Include the CPU specific operations makefile, which provides default 715# values for all CPU errata workarounds and CPU specific optimisations. 716# This can be overridden by the platform. 717include lib/cpus/cpu-ops.mk 718 719ifeq (${ARCH},aarch32) 720NEED_BL32 := yes 721 722################################################################################ 723# Build `AARCH32_SP` as BL32 image for AArch32 724################################################################################ 725ifneq (${AARCH32_SP},none) 726# We expect to locate an sp.mk under the specified AARCH32_SP directory 727AARCH32_SP_MAKE := $(wildcard bl32/${AARCH32_SP}/${AARCH32_SP}.mk) 728 729ifeq (${AARCH32_SP_MAKE},) 730 $(error Error: No bl32/${AARCH32_SP}/${AARCH32_SP}.mk located) 731endif 732 733$(info Including ${AARCH32_SP_MAKE}) 734include ${AARCH32_SP_MAKE} 735endif 736 737endif 738 739################################################################################ 740# Include libc if not overridden 741################################################################################ 742ifeq (${OVERRIDE_LIBC},0) 743include lib/libc/libc.mk 744endif 745 746################################################################################ 747# Check incompatible options 748################################################################################ 749 750ifdef EL3_PAYLOAD_BASE 751 ifdef PRELOADED_BL33_BASE 752 $(warning "PRELOADED_BL33_BASE and EL3_PAYLOAD_BASE are \ 753 incompatible build options. EL3_PAYLOAD_BASE has priority.") 754 endif 755 ifneq (${GENERATE_COT},0) 756 $(error "GENERATE_COT and EL3_PAYLOAD_BASE are incompatible build options.") 757 endif 758 ifneq (${TRUSTED_BOARD_BOOT},0) 759 $(error "TRUSTED_BOARD_BOOT and EL3_PAYLOAD_BASE are incompatible build options.") 760 endif 761endif 762 763ifeq (${NEED_BL33},yes) 764 ifdef EL3_PAYLOAD_BASE 765 $(warning "BL33 image is not needed when option \ 766 BL33_PAYLOAD_BASE is used and won't be added to the FIP file.") 767 endif 768 ifdef PRELOADED_BL33_BASE 769 $(warning "BL33 image is not needed when option \ 770 PRELOADED_BL33_BASE is used and won't be added to the FIP \ 771 file.") 772 endif 773endif 774 775# When building for systems with hardware-assisted coherency, there's no need to 776# use USE_COHERENT_MEM. Require that USE_COHERENT_MEM must be set to 0 too. 777ifeq ($(HW_ASSISTED_COHERENCY)-$(USE_COHERENT_MEM),1-1) 778$(error USE_COHERENT_MEM cannot be enabled with HW_ASSISTED_COHERENCY) 779endif 780 781#For now, BL2_IN_XIP_MEM is only supported when RESET_TO_BL2 is 1. 782ifeq ($(RESET_TO_BL2)-$(BL2_IN_XIP_MEM),0-1) 783$(error "BL2_IN_XIP_MEM is only supported when RESET_TO_BL2 is enabled") 784endif 785 786# For RAS_EXTENSION, require that EAs are handled in EL3 first 787ifeq ($(RAS_EXTENSION),1) 788 ifneq ($(HANDLE_EA_EL3_FIRST_NS),1) 789 $(error For RAS_EXTENSION, HANDLE_EA_EL3_FIRST_NS must also be 1) 790 endif 791endif 792 793# When FAULT_INJECTION_SUPPORT is used, require that RAS_EXTENSION is enabled 794ifeq ($(FAULT_INJECTION_SUPPORT),1) 795 ifneq ($(RAS_EXTENSION),1) 796 $(error For FAULT_INJECTION_SUPPORT, RAS_EXTENSION must also be 1) 797 endif 798endif 799 800# DYN_DISABLE_AUTH can be set only when TRUSTED_BOARD_BOOT=1 801ifeq ($(DYN_DISABLE_AUTH), 1) 802 ifeq (${TRUSTED_BOARD_BOOT}, 0) 803 $(error "TRUSTED_BOARD_BOOT must be enabled for DYN_DISABLE_AUTH to be set.") 804 endif 805endif 806 807ifeq ($(MEASURED_BOOT)-$(TRUSTED_BOARD_BOOT),1-1) 808# Support authentication verification and hash calculation 809 CRYPTO_SUPPORT := 3 810else ifeq ($(DRTM_SUPPORT)-$(TRUSTED_BOARD_BOOT),1-1) 811# Support authentication verification and hash calculation 812 CRYPTO_SUPPORT := 3 813else ifneq ($(filter 1,${MEASURED_BOOT} ${DRTM_SUPPORT}),) 814# Support hash calculation only 815 CRYPTO_SUPPORT := 2 816else ifeq (${TRUSTED_BOARD_BOOT},1) 817# Support authentication verification only 818 CRYPTO_SUPPORT := 1 819else 820 CRYPTO_SUPPORT := 0 821endif 822 823# SDEI_IN_FCONF is only supported when SDEI_SUPPORT is enabled. 824ifeq ($(SDEI_SUPPORT)-$(SDEI_IN_FCONF),0-1) 825$(error "SDEI_IN_FCONF is only supported when SDEI_SUPPORT is enabled") 826endif 827 828# If pointer authentication is used in the firmware, make sure that all the 829# registers associated to it are also saved and restored. 830# Not doing it would leak the value of the keys used by EL3 to EL1 and S-EL1. 831ifeq ($(ENABLE_PAUTH),1) 832 ifeq ($(CTX_INCLUDE_PAUTH_REGS),0) 833 $(error Pointer Authentication requires CTX_INCLUDE_PAUTH_REGS=1) 834 endif 835endif 836 837ifeq ($(CTX_INCLUDE_PAUTH_REGS),1) 838 ifneq (${ARCH},aarch64) 839 $(error CTX_INCLUDE_PAUTH_REGS requires AArch64) 840 endif 841endif 842 843ifeq ($(CTX_INCLUDE_MTE_REGS),1) 844 ifneq (${ARCH},aarch64) 845 $(error CTX_INCLUDE_MTE_REGS requires AArch64) 846 endif 847endif 848 849ifeq ($(PSA_FWU_SUPPORT),1) 850 $(info PSA_FWU_SUPPORT is an experimental feature) 851endif 852 853ifeq ($(FEATURE_DETECTION),1) 854 $(info FEATURE_DETECTION is an experimental feature) 855endif 856 857ifeq (${ARM_XLAT_TABLES_LIB_V1}, 1) 858 ifeq (${ALLOW_RO_XLAT_TABLES}, 1) 859 $(error "ALLOW_RO_XLAT_TABLES requires translation tables library v2") 860 endif 861endif 862 863ifneq (${DECRYPTION_SUPPORT},none) 864 ifeq (${TRUSTED_BOARD_BOOT}, 0) 865 $(error TRUSTED_BOARD_BOOT must be enabled for DECRYPTION_SUPPORT to be set) 866 endif 867endif 868 869# Ensure that no Aarch64-only features are enabled in Aarch32 build 870ifeq (${ARCH},aarch32) 871 872 # SME/SVE only supported on AArch64 873 ifeq (${ENABLE_SME_FOR_NS},1) 874 $(error "ENABLE_SME_FOR_NS cannot be used with ARCH=aarch32") 875 endif 876 ifeq (${ENABLE_SVE_FOR_NS},1) 877 # Warning instead of error due to CI dependency on this 878 $(error "ENABLE_SVE_FOR_NS cannot be used with ARCH=aarch32") 879 endif 880 881 # BRBE is not supported in AArch32 882 ifeq (${ENABLE_BRBE_FOR_NS},1) 883 $(error "ENABLE_BRBE_FOR_NS cannot be used with ARCH=aarch32") 884 endif 885 886 # FEAT_RNG_TRAP is not supported in AArch32 887 ifeq (${ENABLE_FEAT_RNG_TRAP},1) 888 $(error "ENABLE_FEAT_RNG_TRAP cannot be used with ARCH=aarch32") 889 endif 890endif 891 892# Ensure ENABLE_RME is not used with SME 893ifeq (${ENABLE_RME},1) 894 ifeq (${ENABLE_SME_FOR_NS},1) 895 $(error "ENABLE_SME_FOR_NS cannot be used with ENABLE_RME") 896 endif 897endif 898 899# Secure SME/SVE requires the non-secure component as well 900ifeq (${ENABLE_SME_FOR_SWD},1) 901 ifeq (${ENABLE_SME_FOR_NS},0) 902 $(error "ENABLE_SME_FOR_SWD requires ENABLE_SME_FOR_NS") 903 endif 904endif 905ifeq (${ENABLE_SVE_FOR_SWD},1) 906 ifeq (${ENABLE_SVE_FOR_NS},0) 907 $(error "ENABLE_SVE_FOR_SWD requires ENABLE_SVE_FOR_NS") 908 endif 909endif 910 911# SVE and SME cannot be used with CTX_INCLUDE_FPREGS since secure manager does 912# its own context management including FPU registers. 913ifeq (${CTX_INCLUDE_FPREGS},1) 914 ifeq (${ENABLE_SME_FOR_NS},1) 915 $(error "ENABLE_SME_FOR_NS cannot be used with CTX_INCLUDE_FPREGS") 916 endif 917 ifeq (${ENABLE_SVE_FOR_NS},1) 918 # Warning instead of error due to CI dependency on this 919 $(warning "ENABLE_SVE_FOR_NS cannot be used with CTX_INCLUDE_FPREGS") 920 $(warning "Forced ENABLE_SVE_FOR_NS=0") 921 override ENABLE_SVE_FOR_NS := 0 922 endif 923endif 924 925ifeq ($(DRTM_SUPPORT),1) 926 $(info DRTM_SUPPORT is an experimental feature) 927endif 928 929ifeq (${ENABLE_RME},1) 930 ifneq (${SEPARATE_CODE_AND_RODATA},1) 931 $(error `ENABLE_RME=1` requires `SEPARATE_CODE_AND_RODATA=1`) 932 endif 933endif 934 935################################################################################ 936# Process platform overrideable behaviour 937################################################################################ 938 939ifdef BL1_SOURCES 940NEED_BL1 := yes 941endif 942 943ifdef BL2_SOURCES 944 NEED_BL2 := yes 945 946 # Using BL2 implies that a BL33 image also needs to be supplied for the FIP and 947 # Certificate generation tools. This flag can be overridden by the platform. 948 ifdef EL3_PAYLOAD_BASE 949 # If booting an EL3 payload there is no need for a BL33 image 950 # in the FIP file. 951 NEED_BL33 := no 952 else 953 ifdef PRELOADED_BL33_BASE 954 # If booting a BL33 preloaded image there is no need of 955 # another one in the FIP file. 956 NEED_BL33 := no 957 else 958 NEED_BL33 ?= yes 959 endif 960 endif 961endif 962 963ifdef BL2U_SOURCES 964NEED_BL2U := yes 965endif 966 967# If SCP_BL2 is given, we always want FIP to include it. 968ifdef SCP_BL2 969 NEED_SCP_BL2 := yes 970endif 971 972# For AArch32, BL31 is not currently supported. 973ifneq (${ARCH},aarch32) 974 ifdef BL31_SOURCES 975 # When booting an EL3 payload, there is no need to compile the BL31 image nor 976 # put it in the FIP. 977 ifndef EL3_PAYLOAD_BASE 978 NEED_BL31 := yes 979 endif 980 endif 981endif 982 983# Process TBB related flags 984ifneq (${GENERATE_COT},0) 985 # Common cert_create options 986 ifneq (${CREATE_KEYS},0) 987 $(eval CRT_ARGS += -n) 988 $(eval FWU_CRT_ARGS += -n) 989 ifneq (${SAVE_KEYS},0) 990 $(eval CRT_ARGS += -k) 991 $(eval FWU_CRT_ARGS += -k) 992 endif 993 endif 994 # Include TBBR makefile (unless the platform indicates otherwise) 995 ifeq (${INCLUDE_TBBR_MK},1) 996 include make_helpers/tbbr/tbbr_tools.mk 997 endif 998endif 999 1000ifneq (${FIP_ALIGN},0) 1001FIP_ARGS += --align ${FIP_ALIGN} 1002endif 1003 1004ifdef FDT_SOURCES 1005NEED_FDT := yes 1006endif 1007 1008################################################################################ 1009# Include libraries' Makefile that are used in all BL 1010################################################################################ 1011 1012include lib/stack_protector/stack_protector.mk 1013 1014################################################################################ 1015# Auxiliary tools (fiptool, cert_create, etc) 1016################################################################################ 1017 1018# Variables for use with Certificate Generation Tool 1019CRTTOOLPATH ?= tools/cert_create 1020CRTTOOL ?= ${CRTTOOLPATH}/cert_create${BIN_EXT} 1021 1022# Variables for use with Firmware Encryption Tool 1023ENCTOOLPATH ?= tools/encrypt_fw 1024ENCTOOL ?= ${ENCTOOLPATH}/encrypt_fw${BIN_EXT} 1025 1026# Variables for use with Firmware Image Package 1027FIPTOOLPATH ?= tools/fiptool 1028FIPTOOL ?= ${FIPTOOLPATH}/fiptool${BIN_EXT} 1029 1030# Variables for use with sptool 1031SPTOOLPATH ?= tools/sptool 1032SPTOOL ?= ${SPTOOLPATH}/sptool.py 1033SP_MK_GEN ?= ${SPTOOLPATH}/sp_mk_generator.py 1034 1035# Variables for use with ROMLIB 1036ROMLIBPATH ?= lib/romlib 1037 1038# Variable for use with Python 1039PYTHON ?= python3 1040 1041# Variables for use with PRINT_MEMORY_MAP 1042PRINT_MEMORY_MAP_PATH ?= tools/memory 1043PRINT_MEMORY_MAP ?= ${PRINT_MEMORY_MAP_PATH}/print_memory_map.py 1044 1045# Variables for use with documentation build using Sphinx tool 1046DOCS_PATH ?= docs 1047 1048# Defination of SIMICS flag 1049SIMICS_BUILD ?= 0 1050 1051################################################################################ 1052# Include BL specific makefiles 1053################################################################################ 1054 1055ifeq (${NEED_BL1},yes) 1056include bl1/bl1.mk 1057endif 1058 1059ifeq (${NEED_BL2},yes) 1060include bl2/bl2.mk 1061endif 1062 1063ifeq (${NEED_BL2U},yes) 1064include bl2u/bl2u.mk 1065endif 1066 1067ifeq (${NEED_BL31},yes) 1068include bl31/bl31.mk 1069endif 1070 1071################################################################################ 1072# Build options checks 1073################################################################################ 1074 1075$(eval $(call assert_booleans,\ 1076 $(sort \ 1077 ALLOW_RO_XLAT_TABLES \ 1078 BL2_ENABLE_SP_LOAD \ 1079 COLD_BOOT_SINGLE_CPU \ 1080 CREATE_KEYS \ 1081 CTX_INCLUDE_AARCH32_REGS \ 1082 CTX_INCLUDE_FPREGS \ 1083 CTX_INCLUDE_EL2_REGS \ 1084 DEBUG \ 1085 DISABLE_MTPMU \ 1086 DYN_DISABLE_AUTH \ 1087 EL3_EXCEPTION_HANDLING \ 1088 ENABLE_AMU \ 1089 ENABLE_AMU_AUXILIARY_COUNTERS \ 1090 ENABLE_AMU_FCONF \ 1091 AMU_RESTRICT_COUNTERS \ 1092 ENABLE_ASSERTIONS \ 1093 ENABLE_PIE \ 1094 ENABLE_PMF \ 1095 ENABLE_PSCI_STAT \ 1096 ENABLE_RUNTIME_INSTRUMENTATION \ 1097 ENABLE_SME_FOR_NS \ 1098 ENABLE_SME_FOR_SWD \ 1099 ENABLE_SVE_FOR_NS \ 1100 ENABLE_SVE_FOR_SWD \ 1101 ERROR_DEPRECATED \ 1102 FAULT_INJECTION_SUPPORT \ 1103 GENERATE_COT \ 1104 GICV2_G0_FOR_EL3 \ 1105 HANDLE_EA_EL3_FIRST_NS \ 1106 HW_ASSISTED_COHERENCY \ 1107 INVERTED_MEMMAP \ 1108 MEASURED_BOOT \ 1109 DRTM_SUPPORT \ 1110 NS_TIMER_SWITCH \ 1111 OVERRIDE_LIBC \ 1112 PL011_GENERIC_UART \ 1113 PLAT_RSS_NOT_SUPPORTED \ 1114 PROGRAMMABLE_RESET_ADDRESS \ 1115 PSCI_EXTENDED_STATE_ID \ 1116 RESET_TO_BL31 \ 1117 RESET_TO_BL31_WITH_PARAMS \ 1118 SAVE_KEYS \ 1119 SEPARATE_CODE_AND_RODATA \ 1120 SEPARATE_BL2_NOLOAD_REGION \ 1121 SEPARATE_NOBITS_REGION \ 1122 SPIN_ON_BL1_EXIT \ 1123 SPM_MM \ 1124 SPMC_AT_EL3 \ 1125 SPMD_SPM_AT_SEL2 \ 1126 TRUSTED_BOARD_BOOT \ 1127 USE_COHERENT_MEM \ 1128 USE_DEBUGFS \ 1129 ARM_IO_IN_DTB \ 1130 SDEI_IN_FCONF \ 1131 SEC_INT_DESC_IN_FCONF \ 1132 USE_ROMLIB \ 1133 USE_TBBR_DEFS \ 1134 WARMBOOT_ENABLE_DCACHE_EARLY \ 1135 RESET_TO_BL2 \ 1136 BL2_IN_XIP_MEM \ 1137 BL2_INV_DCACHE \ 1138 USE_SPINLOCK_CAS \ 1139 ENCRYPT_BL31 \ 1140 ENCRYPT_BL32 \ 1141 ERRATA_SPECULATIVE_AT \ 1142 RAS_TRAP_NS_ERR_REC_ACCESS \ 1143 COT_DESC_IN_DTB \ 1144 USE_SP804_TIMER \ 1145 PSA_FWU_SUPPORT \ 1146 ENABLE_SYS_REG_TRACE_FOR_NS \ 1147 ENABLE_MPMM \ 1148 ENABLE_MPMM_FCONF \ 1149 SIMICS_BUILD \ 1150 FEATURE_DETECTION \ 1151 TRNG_SUPPORT \ 1152 CONDITIONAL_CMO \ 1153))) 1154 1155$(eval $(call assert_numerics,\ 1156 $(sort \ 1157 ARM_ARCH_MAJOR \ 1158 ARM_ARCH_MINOR \ 1159 BRANCH_PROTECTION \ 1160 CTX_INCLUDE_PAUTH_REGS \ 1161 CTX_INCLUDE_MTE_REGS \ 1162 CTX_INCLUDE_NEVE_REGS \ 1163 CRYPTO_SUPPORT \ 1164 ENABLE_BRBE_FOR_NS \ 1165 ENABLE_TRBE_FOR_NS \ 1166 ENABLE_BTI \ 1167 ENABLE_PAUTH \ 1168 ENABLE_FEAT_AMUv1 \ 1169 ENABLE_FEAT_AMUv1p1 \ 1170 ENABLE_FEAT_CSV2_2 \ 1171 ENABLE_FEAT_DIT \ 1172 ENABLE_FEAT_ECV \ 1173 ENABLE_FEAT_FGT \ 1174 ENABLE_FEAT_HCX \ 1175 ENABLE_FEAT_PAN \ 1176 ENABLE_FEAT_RNG \ 1177 ENABLE_FEAT_RNG_TRAP \ 1178 ENABLE_FEAT_SB \ 1179 ENABLE_FEAT_SEL2 \ 1180 ENABLE_FEAT_TCR2 \ 1181 ENABLE_FEAT_VHE \ 1182 ENABLE_MPAM_FOR_LOWER_ELS \ 1183 ENABLE_RME \ 1184 ENABLE_SPE_FOR_NS \ 1185 ENABLE_TRF_FOR_NS \ 1186 FW_ENC_STATUS \ 1187 NR_OF_FW_BANKS \ 1188 NR_OF_IMAGES_IN_FW_BANK \ 1189 RAS_EXTENSION \ 1190 TWED_DELAY \ 1191 ENABLE_FEAT_TWED \ 1192 SVE_VECTOR_LEN \ 1193))) 1194 1195ifdef KEY_SIZE 1196 $(eval $(call assert_numeric,KEY_SIZE)) 1197endif 1198 1199ifeq ($(filter $(SANITIZE_UB), on off trap),) 1200 $(error "Invalid value for SANITIZE_UB: can be one of on, off, trap") 1201endif 1202 1203################################################################################ 1204# Add definitions to the cpp preprocessor based on the current build options. 1205# This is done after including the platform specific makefile to allow the 1206# platform to overwrite the default options 1207################################################################################ 1208 1209$(eval $(call add_defines,\ 1210 $(sort \ 1211 ALLOW_RO_XLAT_TABLES \ 1212 ARM_ARCH_MAJOR \ 1213 ARM_ARCH_MINOR \ 1214 BL2_ENABLE_SP_LOAD \ 1215 COLD_BOOT_SINGLE_CPU \ 1216 CTX_INCLUDE_AARCH32_REGS \ 1217 CTX_INCLUDE_FPREGS \ 1218 CTX_INCLUDE_PAUTH_REGS \ 1219 EL3_EXCEPTION_HANDLING \ 1220 CTX_INCLUDE_MTE_REGS \ 1221 CTX_INCLUDE_EL2_REGS \ 1222 CTX_INCLUDE_NEVE_REGS \ 1223 DECRYPTION_SUPPORT_${DECRYPTION_SUPPORT} \ 1224 DISABLE_MTPMU \ 1225 ENABLE_AMU \ 1226 ENABLE_AMU_AUXILIARY_COUNTERS \ 1227 ENABLE_AMU_FCONF \ 1228 AMU_RESTRICT_COUNTERS \ 1229 ENABLE_ASSERTIONS \ 1230 ENABLE_BTI \ 1231 ENABLE_MPAM_FOR_LOWER_ELS \ 1232 ENABLE_PAUTH \ 1233 ENABLE_PIE \ 1234 ENABLE_PMF \ 1235 ENABLE_PSCI_STAT \ 1236 ENABLE_RME \ 1237 ENABLE_RUNTIME_INSTRUMENTATION \ 1238 ENABLE_SME_FOR_NS \ 1239 ENABLE_SME_FOR_SWD \ 1240 ENABLE_SPE_FOR_NS \ 1241 ENABLE_SVE_FOR_NS \ 1242 ENABLE_SVE_FOR_SWD \ 1243 ENCRYPT_BL31 \ 1244 ENCRYPT_BL32 \ 1245 ERROR_DEPRECATED \ 1246 FAULT_INJECTION_SUPPORT \ 1247 GICV2_G0_FOR_EL3 \ 1248 HANDLE_EA_EL3_FIRST_NS \ 1249 HW_ASSISTED_COHERENCY \ 1250 LOG_LEVEL \ 1251 MEASURED_BOOT \ 1252 DRTM_SUPPORT \ 1253 NS_TIMER_SWITCH \ 1254 PL011_GENERIC_UART \ 1255 PLAT_${PLAT} \ 1256 PLAT_RSS_NOT_SUPPORTED \ 1257 PROGRAMMABLE_RESET_ADDRESS \ 1258 PSCI_EXTENDED_STATE_ID \ 1259 RAS_EXTENSION \ 1260 RESET_TO_BL31 \ 1261 RESET_TO_BL31_WITH_PARAMS \ 1262 SEPARATE_CODE_AND_RODATA \ 1263 SEPARATE_BL2_NOLOAD_REGION \ 1264 SEPARATE_NOBITS_REGION \ 1265 RECLAIM_INIT_CODE \ 1266 SPD_${SPD} \ 1267 SPIN_ON_BL1_EXIT \ 1268 SPM_MM \ 1269 SPMC_AT_EL3 \ 1270 SPMD_SPM_AT_SEL2 \ 1271 TRUSTED_BOARD_BOOT \ 1272 CRYPTO_SUPPORT \ 1273 TRNG_SUPPORT \ 1274 USE_COHERENT_MEM \ 1275 USE_DEBUGFS \ 1276 ARM_IO_IN_DTB \ 1277 SDEI_IN_FCONF \ 1278 SEC_INT_DESC_IN_FCONF \ 1279 USE_ROMLIB \ 1280 USE_TBBR_DEFS \ 1281 WARMBOOT_ENABLE_DCACHE_EARLY \ 1282 RESET_TO_BL2 \ 1283 BL2_RUNS_AT_EL3 \ 1284 BL2_IN_XIP_MEM \ 1285 BL2_INV_DCACHE \ 1286 USE_SPINLOCK_CAS \ 1287 ERRATA_SPECULATIVE_AT \ 1288 RAS_TRAP_NS_ERR_REC_ACCESS \ 1289 COT_DESC_IN_DTB \ 1290 USE_SP804_TIMER \ 1291 ENABLE_FEAT_RNG \ 1292 ENABLE_FEAT_RNG_TRAP \ 1293 ENABLE_FEAT_SB \ 1294 ENABLE_FEAT_DIT \ 1295 NR_OF_FW_BANKS \ 1296 NR_OF_IMAGES_IN_FW_BANK \ 1297 PSA_FWU_SUPPORT \ 1298 ENABLE_BRBE_FOR_NS \ 1299 ENABLE_TRBE_FOR_NS \ 1300 ENABLE_SYS_REG_TRACE_FOR_NS \ 1301 ENABLE_TRF_FOR_NS \ 1302 ENABLE_FEAT_HCX \ 1303 ENABLE_MPMM \ 1304 ENABLE_MPMM_FCONF \ 1305 ENABLE_FEAT_FGT \ 1306 ENABLE_FEAT_AMUv1 \ 1307 ENABLE_FEAT_ECV \ 1308 SIMICS_BUILD \ 1309 ENABLE_FEAT_AMUv1p1 \ 1310 ENABLE_FEAT_SEL2 \ 1311 ENABLE_FEAT_VHE \ 1312 ENABLE_FEAT_CSV2_2 \ 1313 ENABLE_FEAT_PAN \ 1314 ENABLE_FEAT_TCR2 \ 1315 FEATURE_DETECTION \ 1316 TWED_DELAY \ 1317 ENABLE_FEAT_TWED \ 1318 CONDITIONAL_CMO \ 1319))) 1320 1321ifeq (${SANITIZE_UB},trap) 1322 $(eval $(call add_define,MONITOR_TRAPS)) 1323endif 1324 1325# Define the EL3_PAYLOAD_BASE flag only if it is provided. 1326ifdef EL3_PAYLOAD_BASE 1327 $(eval $(call add_define,EL3_PAYLOAD_BASE)) 1328else 1329 # Define the PRELOADED_BL33_BASE flag only if it is provided and 1330 # EL3_PAYLOAD_BASE is not defined, as it has priority. 1331 ifdef PRELOADED_BL33_BASE 1332 $(eval $(call add_define,PRELOADED_BL33_BASE)) 1333 endif 1334endif 1335 1336# Define the DYN_DISABLE_AUTH flag only if set. 1337ifeq (${DYN_DISABLE_AUTH},1) 1338$(eval $(call add_define,DYN_DISABLE_AUTH)) 1339endif 1340 1341ifneq ($(findstring armlink,$(notdir $(LD))),) 1342$(eval $(call add_define,USE_ARM_LINK)) 1343endif 1344 1345# Generate and include sp_gen.mk if SPD is spmd and SP_LAYOUT_FILE is defined 1346ifeq (${SPD},spmd) 1347ifdef SP_LAYOUT_FILE 1348 -include $(BUILD_PLAT)/sp_gen.mk 1349 FIP_DEPS += sp 1350 CRT_DEPS += sp 1351 NEED_SP_PKG := yes 1352else 1353 ifeq (${SPMD_SPM_AT_SEL2},1) 1354 $(error "SPMD with SPM at S-EL2 require SP_LAYOUT_FILE") 1355 endif 1356endif 1357endif 1358 1359################################################################################ 1360# Build targets 1361################################################################################ 1362 1363.PHONY: all msg_start clean realclean distclean cscope locate-checkpatch checkcodebase checkpatch fiptool sptool fip sp fwu_fip certtool dtbs memmap doc enctool 1364.SUFFIXES: 1365 1366all: msg_start 1367 1368msg_start: 1369 @echo "Building ${PLAT}" 1370 1371ifeq (${ERROR_DEPRECATED},0) 1372# Check if deprecated declarations and cpp warnings should be treated as error or not. 1373ifneq ($(findstring clang,$(notdir $(CC))),) 1374 CPPFLAGS += -Wno-error=deprecated-declarations 1375else 1376 CPPFLAGS += -Wno-error=deprecated-declarations -Wno-error=cpp 1377endif 1378endif # !ERROR_DEPRECATED 1379 1380$(eval $(call MAKE_LIB_DIRS)) 1381$(eval $(call MAKE_LIB,c)) 1382 1383# Expand build macros for the different images 1384ifeq (${NEED_BL1},yes) 1385BL1_SOURCES := $(sort ${BL1_SOURCES}) 1386 1387$(eval $(call MAKE_BL,bl1)) 1388endif 1389 1390ifeq (${NEED_BL2},yes) 1391ifeq (${RESET_TO_BL2}, 0) 1392FIP_BL2_ARGS := tb-fw 1393endif 1394 1395BL2_SOURCES := $(sort ${BL2_SOURCES}) 1396 1397$(if ${BL2}, $(eval $(call TOOL_ADD_IMG,bl2,--${FIP_BL2_ARGS})),\ 1398 $(eval $(call MAKE_BL,bl2,${FIP_BL2_ARGS}))) 1399endif 1400 1401ifeq (${NEED_SCP_BL2},yes) 1402$(eval $(call TOOL_ADD_IMG,scp_bl2,--scp-fw)) 1403endif 1404 1405ifeq (${NEED_BL31},yes) 1406BL31_SOURCES += ${SPD_SOURCES} 1407# Sort BL31 source files to remove duplicates 1408BL31_SOURCES := $(sort ${BL31_SOURCES}) 1409ifneq (${DECRYPTION_SUPPORT},none) 1410$(if ${BL31}, $(eval $(call TOOL_ADD_IMG,bl31,--soc-fw,,$(ENCRYPT_BL31))),\ 1411 $(eval $(call MAKE_BL,bl31,soc-fw,,$(ENCRYPT_BL31)))) 1412else 1413$(if ${BL31}, $(eval $(call TOOL_ADD_IMG,bl31,--soc-fw)),\ 1414 $(eval $(call MAKE_BL,bl31,soc-fw))) 1415endif 1416endif 1417 1418# If a BL32 image is needed but neither BL32 nor BL32_SOURCES is defined, the 1419# build system will call TOOL_ADD_IMG to print a warning message and abort the 1420# process. Note that the dependency on BL32 applies to the FIP only. 1421ifeq (${NEED_BL32},yes) 1422# Sort BL32 source files to remove duplicates 1423BL32_SOURCES := $(sort ${BL32_SOURCES}) 1424BUILD_BL32 := $(if $(BL32),,$(if $(BL32_SOURCES),1)) 1425 1426ifneq (${DECRYPTION_SUPPORT},none) 1427$(if ${BUILD_BL32}, $(eval $(call MAKE_BL,bl32,tos-fw,,$(ENCRYPT_BL32))),\ 1428 $(eval $(call TOOL_ADD_IMG,bl32,--tos-fw,,$(ENCRYPT_BL32)))) 1429else 1430$(if ${BUILD_BL32}, $(eval $(call MAKE_BL,bl32,tos-fw)),\ 1431 $(eval $(call TOOL_ADD_IMG,bl32,--tos-fw))) 1432endif 1433endif 1434 1435# If RMM image is needed but RMM is not defined, Test Realm Payload (TRP) 1436# needs to be built from RMM_SOURCES. 1437ifeq (${NEED_RMM},yes) 1438# Sort RMM source files to remove duplicates 1439RMM_SOURCES := $(sort ${RMM_SOURCES}) 1440BUILD_RMM := $(if $(RMM),,$(if $(RMM_SOURCES),1)) 1441 1442$(if ${BUILD_RMM}, $(eval $(call MAKE_BL,rmm,rmm-fw)),\ 1443 $(eval $(call TOOL_ADD_IMG,rmm,--rmm-fw))) 1444endif 1445 1446# Add the BL33 image if required by the platform 1447ifeq (${NEED_BL33},yes) 1448$(eval $(call TOOL_ADD_IMG,bl33,--nt-fw)) 1449endif 1450 1451ifeq (${NEED_BL2U},yes) 1452$(if ${BL2U}, $(eval $(call TOOL_ADD_IMG,bl2u,--ap-fwu-cfg,FWU_)),\ 1453 $(eval $(call MAKE_BL,bl2u,ap-fwu-cfg,FWU_))) 1454endif 1455 1456# Expand build macros for the different images 1457ifeq (${NEED_FDT},yes) 1458 $(eval $(call MAKE_DTBS,$(BUILD_PLAT)/fdts,$(FDT_SOURCES))) 1459endif 1460 1461# Add Secure Partition packages 1462ifeq (${NEED_SP_PKG},yes) 1463$(BUILD_PLAT)/sp_gen.mk: ${SP_MK_GEN} ${SP_LAYOUT_FILE} | ${BUILD_PLAT} 1464 ${Q}${PYTHON} "$<" "$@" $(filter-out $<,$^) $(BUILD_PLAT) ${COT} 1465sp: $(DTBS) $(BUILD_PLAT)/sp_gen.mk $(SP_PKGS) 1466 @${ECHO_BLANK_LINE} 1467 @echo "Built SP Images successfully" 1468 @${ECHO_BLANK_LINE} 1469endif 1470 1471locate-checkpatch: 1472ifndef CHECKPATCH 1473 $(error "Please set CHECKPATCH to point to the Linux checkpatch.pl file, eg: CHECKPATCH=../linux/scripts/checkpatch.pl") 1474else 1475ifeq (,$(wildcard ${CHECKPATCH})) 1476 $(error "The file CHECKPATCH points to cannot be found, use eg: CHECKPATCH=../linux/scripts/checkpatch.pl") 1477endif 1478endif 1479 1480clean: 1481 @echo " CLEAN" 1482 $(call SHELL_REMOVE_DIR,${BUILD_PLAT}) 1483ifdef UNIX_MK 1484 ${Q}${MAKE} --no-print-directory -C ${FIPTOOLPATH} clean 1485else 1486# Clear the MAKEFLAGS as we do not want 1487# to pass the gnumake flags to nmake. 1488 ${Q}set MAKEFLAGS= && ${MSVC_NMAKE} /nologo /f ${FIPTOOLPATH}/Makefile.msvc FIPTOOLPATH=$(subst /,\,$(FIPTOOLPATH)) FIPTOOL=$(subst /,\,$(FIPTOOL)) clean 1489endif 1490 ${Q}${MAKE} PLAT=${PLAT} --no-print-directory -C ${CRTTOOLPATH} clean 1491 ${Q}${MAKE} PLAT=${PLAT} --no-print-directory -C ${ENCTOOLPATH} clean 1492 ${Q}${MAKE} --no-print-directory -C ${ROMLIBPATH} clean 1493 1494realclean distclean: 1495 @echo " REALCLEAN" 1496 $(call SHELL_REMOVE_DIR,${BUILD_BASE}) 1497 $(call SHELL_DELETE_ALL, ${CURDIR}/cscope.*) 1498ifdef UNIX_MK 1499 ${Q}${MAKE} --no-print-directory -C ${FIPTOOLPATH} clean 1500else 1501# Clear the MAKEFLAGS as we do not want 1502# to pass the gnumake flags to nmake. 1503 ${Q}set MAKEFLAGS= && ${MSVC_NMAKE} /nologo /f ${FIPTOOLPATH}/Makefile.msvc FIPTOOLPATH=$(subst /,\,$(FIPTOOLPATH)) FIPTOOL=$(subst /,\,$(FIPTOOL)) realclean 1504endif 1505 ${Q}${MAKE} PLAT=${PLAT} --no-print-directory -C ${CRTTOOLPATH} realclean 1506 ${Q}${MAKE} PLAT=${PLAT} --no-print-directory -C ${ENCTOOLPATH} realclean 1507 ${Q}${MAKE} --no-print-directory -C ${ROMLIBPATH} clean 1508 1509checkcodebase: locate-checkpatch 1510 @echo " CHECKING STYLE" 1511 @if test -d .git ; then \ 1512 git ls-files | grep -E -v 'libfdt|libc|docs|\.rst' | \ 1513 while read GIT_FILE ; \ 1514 do ${CHECKPATCH} ${CHECKCODE_ARGS} -f $$GIT_FILE ; \ 1515 done ; \ 1516 else \ 1517 find . -type f -not -iwholename "*.git*" \ 1518 -not -iwholename "*build*" \ 1519 -not -iwholename "*libfdt*" \ 1520 -not -iwholename "*libc*" \ 1521 -not -iwholename "*docs*" \ 1522 -not -iwholename "*.rst" \ 1523 -exec ${CHECKPATCH} ${CHECKCODE_ARGS} -f {} \; ; \ 1524 fi 1525 1526checkpatch: locate-checkpatch 1527 @echo " CHECKING STYLE" 1528 @if test -n "${CHECKPATCH_OPTS}"; then \ 1529 echo " with ${CHECKPATCH_OPTS} option(s)"; \ 1530 fi 1531 ${Q}COMMON_COMMIT=$$(git merge-base HEAD ${BASE_COMMIT}); \ 1532 for commit in `git rev-list --no-merges $$COMMON_COMMIT..HEAD`; \ 1533 do \ 1534 printf "\n[*] Checking style of '$$commit'\n\n"; \ 1535 git log --format=email "$$commit~..$$commit" \ 1536 -- ${CHECK_PATHS} | \ 1537 ${CHECKPATCH} ${CHECKPATCH_OPTS} - || true; \ 1538 git diff --format=email "$$commit~..$$commit" \ 1539 -- ${CHECK_PATHS} | \ 1540 ${CHECKPATCH} ${CHECKPATCH_OPTS} - || true; \ 1541 done 1542 1543certtool: ${CRTTOOL} 1544 1545${CRTTOOL}: FORCE 1546 ${Q}${MAKE} PLAT=${PLAT} USE_TBBR_DEFS=${USE_TBBR_DEFS} COT=${COT} OPENSSL_DIR=${OPENSSL_DIR} CRTTOOL=${CRTTOOL} DEBUG=${DEBUG} V=${V} --no-print-directory -C ${CRTTOOLPATH} all 1547 @${ECHO_BLANK_LINE} 1548 @echo "Built $@ successfully" 1549 @${ECHO_BLANK_LINE} 1550 1551ifneq (${GENERATE_COT},0) 1552certificates: ${CRT_DEPS} ${CRTTOOL} 1553 ${Q}${CRTTOOL} ${CRT_ARGS} 1554 @${ECHO_BLANK_LINE} 1555 @echo "Built $@ successfully" 1556 @echo "Certificates can be found in ${BUILD_PLAT}" 1557 @${ECHO_BLANK_LINE} 1558endif 1559 1560${BUILD_PLAT}/${FIP_NAME}: ${FIP_DEPS} ${FIPTOOL} 1561 $(eval ${CHECK_FIP_CMD}) 1562 ${Q}${FIPTOOL} create ${FIP_ARGS} $@ 1563 ${Q}${FIPTOOL} info $@ 1564 @${ECHO_BLANK_LINE} 1565 @echo "Built $@ successfully" 1566 @${ECHO_BLANK_LINE} 1567 1568ifneq (${GENERATE_COT},0) 1569fwu_certificates: ${FWU_CRT_DEPS} ${CRTTOOL} 1570 ${Q}${CRTTOOL} ${FWU_CRT_ARGS} 1571 @${ECHO_BLANK_LINE} 1572 @echo "Built $@ successfully" 1573 @echo "FWU certificates can be found in ${BUILD_PLAT}" 1574 @${ECHO_BLANK_LINE} 1575endif 1576 1577${BUILD_PLAT}/${FWU_FIP_NAME}: ${FWU_FIP_DEPS} ${FIPTOOL} 1578 $(eval ${CHECK_FWU_FIP_CMD}) 1579 ${Q}${FIPTOOL} create ${FWU_FIP_ARGS} $@ 1580 ${Q}${FIPTOOL} info $@ 1581 @${ECHO_BLANK_LINE} 1582 @echo "Built $@ successfully" 1583 @${ECHO_BLANK_LINE} 1584 1585fiptool: ${FIPTOOL} 1586fip: ${BUILD_PLAT}/${FIP_NAME} 1587fwu_fip: ${BUILD_PLAT}/${FWU_FIP_NAME} 1588 1589${FIPTOOL}: FORCE 1590ifdef UNIX_MK 1591 ${Q}${MAKE} CPPFLAGS="-DVERSION='\"${VERSION_STRING}\"'" FIPTOOL=${FIPTOOL} OPENSSL_DIR=${OPENSSL_DIR} DEBUG=${DEBUG} V=${V} --no-print-directory -C ${FIPTOOLPATH} all 1592else 1593# Clear the MAKEFLAGS as we do not want 1594# to pass the gnumake flags to nmake. 1595 ${Q}set MAKEFLAGS= && ${MSVC_NMAKE} /nologo /f ${FIPTOOLPATH}/Makefile.msvc FIPTOOLPATH=$(subst /,\,$(FIPTOOLPATH)) FIPTOOL=$(subst /,\,$(FIPTOOL)) 1596endif 1597 1598romlib.bin: libraries FORCE 1599 ${Q}${MAKE} PLAT_DIR=${PLAT_DIR} BUILD_PLAT=${BUILD_PLAT} ENABLE_BTI=${ENABLE_BTI} ARM_ARCH_MINOR=${ARM_ARCH_MINOR} INCLUDES='${INCLUDES}' DEFINES='${DEFINES}' --no-print-directory -C ${ROMLIBPATH} all 1600 1601# Call print_memory_map tool 1602memmap: all 1603 ${Q}${PYTHON} ${PRINT_MEMORY_MAP} ${BUILD_PLAT} ${INVERTED_MEMMAP} 1604 1605doc: 1606 @echo " BUILD DOCUMENTATION" 1607 ${Q}${MAKE} --no-print-directory -C ${DOCS_PATH} html 1608 1609enctool: ${ENCTOOL} 1610 1611${ENCTOOL}: FORCE 1612 ${Q}${MAKE} PLAT=${PLAT} BUILD_INFO=0 OPENSSL_DIR=${OPENSSL_DIR} ENCTOOL=${ENCTOOL} DEBUG=${DEBUG} V=${V} --no-print-directory -C ${ENCTOOLPATH} all 1613 @${ECHO_BLANK_LINE} 1614 @echo "Built $@ successfully" 1615 @${ECHO_BLANK_LINE} 1616 1617cscope: 1618 @echo " CSCOPE" 1619 ${Q}find ${CURDIR} -name "*.[chsS]" > cscope.files 1620 ${Q}cscope -b -q -k 1621 1622help: 1623 @echo "usage: ${MAKE} [PLAT=<platform>] [OPTIONS] [TARGET]" 1624 @echo "" 1625 @echo "PLAT is used to specify which platform you wish to build." 1626 @echo "If no platform is specified, PLAT defaults to: ${DEFAULT_PLAT}" 1627 @echo "" 1628 @echo "platform = ${PLATFORM_LIST}" 1629 @echo "" 1630 @echo "Please refer to the User Guide for a list of all supported options." 1631 @echo "Note that the build system doesn't track dependencies for build " 1632 @echo "options. Therefore, if any of the build options are changed " 1633 @echo "from a previous build, a clean build must be performed." 1634 @echo "" 1635 @echo "Supported Targets:" 1636 @echo " all Build all individual bootloader binaries" 1637 @echo " bl1 Build the BL1 binary" 1638 @echo " bl2 Build the BL2 binary" 1639 @echo " bl2u Build the BL2U binary" 1640 @echo " bl31 Build the BL31 binary" 1641 @echo " bl32 Build the BL32 binary. If ARCH=aarch32, then " 1642 @echo " this builds secure payload specified by AARCH32_SP" 1643 @echo " certificates Build the certificates (requires 'GENERATE_COT=1')" 1644 @echo " fip Build the Firmware Image Package (FIP)" 1645 @echo " fwu_fip Build the FWU Firmware Image Package (FIP)" 1646 @echo " checkcodebase Check the coding style of the entire source tree" 1647 @echo " checkpatch Check the coding style on changes in the current" 1648 @echo " branch against BASE_COMMIT (default origin/master)" 1649 @echo " clean Clean the build for the selected platform" 1650 @echo " cscope Generate cscope index" 1651 @echo " distclean Remove all build artifacts for all platforms" 1652 @echo " certtool Build the Certificate generation tool" 1653 @echo " enctool Build the Firmware encryption tool" 1654 @echo " fiptool Build the Firmware Image Package (FIP) creation tool" 1655 @echo " sp Build the Secure Partition Packages" 1656 @echo " sptool Build the Secure Partition Package creation tool" 1657 @echo " dtbs Build the Device Tree Blobs (if required for the platform)" 1658 @echo " memmap Print the memory map of the built binaries" 1659 @echo " doc Build html based documentation using Sphinx tool" 1660 @echo "" 1661 @echo "Note: most build targets require PLAT to be set to a specific platform." 1662 @echo "" 1663 @echo "example: build all targets for the FVP platform:" 1664 @echo " CROSS_COMPILE=aarch64-none-elf- make PLAT=fvp all" 1665 1666.PHONY: FORCE 1667FORCE:; 1668