xref: /rk3399_ARM-atf/Makefile (revision 42d4d3baacb3b11c68163ec85de1bf2e34e0c882)
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 $(CC) -v 2>&1)
447
448# LD = armlink
449ifneq ($(findstring armlink,$(notdir $(LD))),)
450TF_LDFLAGS		+=	--diag_error=warning --lto_level=O1
451TF_LDFLAGS		+=	--remove --info=unused,unusedsymbols
452TF_LDFLAGS		+=	$(TF_LDFLAGS_$(ARCH))
453
454# LD = gcc (used when GCC LTO is enabled)
455else ifneq ($(findstring gcc,$(notdir $(LD))),)
456# Pass ld options with Wl or Xlinker switches
457TF_LDFLAGS		+=	-Wl,--fatal-warnings -O1
458TF_LDFLAGS		+=	-Wl,--gc-sections
459
460TF_LDFLAGS		+=	-Wl,-z,common-page-size=4096 # Configure page size constants
461TF_LDFLAGS		+=	-Wl,-z,max-page-size=4096
462
463ifeq ($(ENABLE_LTO),1)
464	ifeq (${ARCH},aarch64)
465		TF_LDFLAGS	+=	-flto -fuse-linker-plugin
466	endif
467endif
468# GCC automatically adds fix-cortex-a53-843419 flag when used to link
469# which breaks some builds, so disable if errata fix is not explicitly enabled
470ifneq (${ERRATA_A53_843419},1)
471	TF_LDFLAGS	+= 	-mno-fix-cortex-a53-843419
472endif
473TF_LDFLAGS		+= 	-nostdlib
474TF_LDFLAGS		+=	$(subst --,-Xlinker --,$(TF_LDFLAGS_$(ARCH)))
475
476# LD = gcc-ld (ld) or llvm-ld (ld.lld) or other
477else
478TF_LDFLAGS		+=	-O1
479TF_LDFLAGS		+=	--gc-sections
480
481TF_LDFLAGS		+=	-z common-page-size=4096 # Configure page size constants
482TF_LDFLAGS		+=	-z max-page-size=4096
483
484# ld.lld doesn't recognize the errata flags,
485# therefore don't add those in that case.
486# ld.lld reports section type mismatch warnings,
487# therefore don't add --fatal-warnings to it.
488ifeq ($(findstring ld.lld,$(notdir $(LD))),)
489TF_LDFLAGS		+=	$(TF_LDFLAGS_$(ARCH)) --fatal-warnings
490endif
491endif
492
493DTC_FLAGS		+=	-I dts -O dtb
494DTC_CPPFLAGS		+=	-P -nostdinc -Iinclude -Ifdts -undef \
495				-x assembler-with-cpp $(DEFINES)
496
497################################################################################
498# Common sources and include directories
499################################################################################
500include ${MAKE_HELPERS_DIRECTORY}arch_features.mk
501include lib/compiler-rt/compiler-rt.mk
502
503BL_COMMON_SOURCES	+=	common/bl_common.c			\
504				common/tf_log.c				\
505				common/${ARCH}/debug.S			\
506				drivers/console/multi_console.c		\
507				lib/${ARCH}/cache_helpers.S		\
508				lib/${ARCH}/misc_helpers.S		\
509				plat/common/plat_bl_common.c		\
510				plat/common/plat_log_common.c		\
511				plat/common/${ARCH}/plat_common.c	\
512				plat/common/${ARCH}/platform_helpers.S	\
513				${COMPILER_RT_SRCS}
514
515ifeq ($(notdir $(CC)),armclang)
516BL_COMMON_SOURCES	+=	lib/${ARCH}/armclang_printf.S
517endif
518
519ifeq (${SANITIZE_UB},on)
520BL_COMMON_SOURCES	+=	plat/common/ubsan.c
521endif
522
523INCLUDES		+=	-Iinclude				\
524				-Iinclude/arch/${ARCH}			\
525				-Iinclude/lib/cpus/${ARCH}		\
526				-Iinclude/lib/el3_runtime/${ARCH}	\
527				${PLAT_INCLUDES}			\
528				${SPD_INCLUDES}
529
530include common/backtrace/backtrace.mk
531
532################################################################################
533# Generic definitions
534################################################################################
535
536include ${MAKE_HELPERS_DIRECTORY}plat_helpers.mk
537
538ifeq (${BUILD_BASE},)
539     BUILD_BASE		:=	./build
540endif
541BUILD_PLAT		:=	$(abspath ${BUILD_BASE})/${PLAT}/${BUILD_TYPE}
542
543SPDS			:=	$(sort $(filter-out none, $(patsubst services/spd/%,%,$(wildcard services/spd/*))))
544
545# Platforms providing their own TBB makefile may override this value
546INCLUDE_TBBR_MK		:=	1
547
548
549################################################################################
550# Include SPD Makefile if one has been specified
551################################################################################
552
553ifneq (${SPD},none)
554    ifeq (${ARCH},aarch32)
555        $(error "Error: SPD is incompatible with AArch32.")
556    endif
557
558    ifdef EL3_PAYLOAD_BASE
559        $(warning "SPD and EL3_PAYLOAD_BASE are incompatible build options.")
560        $(warning "The SPD and its BL32 companion will be present but ignored.")
561    endif
562
563    ifeq (${SPD},spmd)
564        # SPMD is located in std_svc directory
565        SPD_DIR := std_svc
566
567        ifeq ($(SPMD_SPM_AT_SEL2),1)
568            CTX_INCLUDE_EL2_REGS := 1
569	    ifeq ($(SPMC_AT_EL3),1)
570                $(error SPM cannot be enabled in both S-EL2 and EL3.)
571            endif
572        endif
573
574        ifeq ($(findstring optee_sp,$(ARM_SPMC_MANIFEST_DTS)),optee_sp)
575            DTC_CPPFLAGS	+=	-DOPTEE_SP_FW_CONFIG
576        endif
577
578        ifeq ($(TS_SP_FW_CONFIG),1)
579            DTC_CPPFLAGS	+=	-DTS_SP_FW_CONFIG
580        endif
581
582        ifneq ($(ARM_BL2_SP_LIST_DTS),)
583            DTC_CPPFLAGS += -DARM_BL2_SP_LIST_DTS=$(ARM_BL2_SP_LIST_DTS)
584        endif
585
586        ifneq ($(SP_LAYOUT_FILE),)
587            BL2_ENABLE_SP_LOAD := 1
588        endif
589    else
590        # All other SPDs in spd directory
591        SPD_DIR := spd
592    endif
593
594    # We expect to locate an spd.mk under the specified SPD directory
595    SPD_MAKE	:=	$(wildcard services/${SPD_DIR}/${SPD}/${SPD}.mk)
596
597    ifeq (${SPD_MAKE},)
598        $(error Error: No services/${SPD_DIR}/${SPD}/${SPD}.mk located)
599    endif
600    $(info Including ${SPD_MAKE})
601    include ${SPD_MAKE}
602
603    # If there's BL32 companion for the chosen SPD, we expect that the SPD's
604    # Makefile would set NEED_BL32 to "yes". In this case, the build system
605    # supports two mutually exclusive options:
606    # * BL32 is built from source: then BL32_SOURCES must contain the list
607    #   of source files to build BL32
608    # * BL32 is a prebuilt binary: then BL32 must point to the image file
609    #   that will be included in the FIP
610    # If both BL32_SOURCES and BL32 are defined, the binary takes precedence
611    # over the sources.
612endif
613
614ifeq (${CTX_INCLUDE_EL2_REGS}, 1)
615ifeq (${SPD},none)
616ifeq (${ENABLE_RME},0)
617    $(error CTX_INCLUDE_EL2_REGS is available only when SPD or RME is enabled)
618endif
619endif
620endif
621
622################################################################################
623# Include rmmd Makefile if RME is enabled
624################################################################################
625
626ifneq (${ENABLE_RME},0)
627ifneq (${ARCH},aarch64)
628	$(error ENABLE_RME requires AArch64)
629endif
630ifeq ($(SPMC_AT_EL3),1)
631	$(error SPMC_AT_EL3 and ENABLE_RME cannot both be enabled.)
632endif
633include services/std_svc/rmmd/rmmd.mk
634$(warning "RME is an experimental feature")
635endif
636
637################################################################################
638# Include the platform specific Makefile after the SPD Makefile (the platform
639# makefile may use all previous definitions in this file)
640################################################################################
641
642include ${PLAT_MAKEFILE_FULL}
643
644# This internal flag is common option which is set to 1 for scenarios
645# when the BL2 is running in EL3 level. This occurs in two scenarios -
646# 4 world system running BL2 at EL3 and two world system without BL1 running
647# BL2 in EL3
648
649ifeq (${RESET_TO_BL2},1)
650	BL2_RUNS_AT_EL3	:=	1
651    ifeq (${ENABLE_RME},1)
652        $(error RESET_TO_BL2=1 and ENABLE_RME=1 configuration is not supported at the moment.)
653    endif
654else ifeq (${ENABLE_RME},1)
655	BL2_RUNS_AT_EL3	:=	1
656else
657	BL2_RUNS_AT_EL3	:=	0
658endif
659
660$(eval $(call MAKE_PREREQ_DIR,${BUILD_PLAT}))
661
662ifeq (${ARM_ARCH_MAJOR},7)
663include make_helpers/armv7-a-cpus.mk
664endif
665
666PIE_FOUND		:=	$(findstring --enable-default-pie,${GCC_V_OUTPUT})
667ifneq ($(PIE_FOUND),)
668	TF_CFLAGS	+=	-fno-PIE
669ifneq ($(findstring gcc,$(notdir $(LD))),)
670	TF_LDFLAGS	+=	-no-pie
671endif
672endif
673
674ifneq ($(findstring gcc,$(notdir $(LD))),)
675	PIE_LDFLAGS	+=	-Wl,-pie -Wl,--no-dynamic-linker
676else
677	PIE_LDFLAGS	+=	-pie --no-dynamic-linker
678endif
679
680ifeq ($(ENABLE_PIE),1)
681ifeq ($(RESET_TO_BL2),1)
682ifneq ($(BL2_IN_XIP_MEM),1)
683	BL2_CPPFLAGS	+=	-fpie
684	BL2_CFLAGS	+=	-fpie
685	BL2_LDFLAGS	+=	$(PIE_LDFLAGS)
686endif
687endif
688	BL31_CPPFLAGS	+=	-fpie
689	BL31_CFLAGS 	+=	-fpie
690	BL31_LDFLAGS	+=	$(PIE_LDFLAGS)
691
692	BL32_CPPFLAGS	+=	-fpie
693	BL32_CFLAGS	+=	-fpie
694	BL32_LDFLAGS	+=	$(PIE_LDFLAGS)
695endif
696
697ifeq (${ARCH},aarch64)
698BL1_CPPFLAGS += -DIMAGE_AT_EL3
699ifeq ($(RESET_TO_BL2),1)
700BL2_CPPFLAGS += -DIMAGE_AT_EL3
701else
702BL2_CPPFLAGS += -DIMAGE_AT_EL1
703endif
704BL2U_CPPFLAGS += -DIMAGE_AT_EL1
705BL31_CPPFLAGS += -DIMAGE_AT_EL3
706BL32_CPPFLAGS += -DIMAGE_AT_EL1
707endif
708
709# Include the CPU specific operations makefile, which provides default
710# values for all CPU errata workarounds and CPU specific optimisations.
711# This can be overridden by the platform.
712include lib/cpus/cpu-ops.mk
713
714ifeq (${ARCH},aarch32)
715NEED_BL32 := yes
716
717################################################################################
718# Build `AARCH32_SP` as BL32 image for AArch32
719################################################################################
720ifneq (${AARCH32_SP},none)
721# We expect to locate an sp.mk under the specified AARCH32_SP directory
722AARCH32_SP_MAKE	:=	$(wildcard bl32/${AARCH32_SP}/${AARCH32_SP}.mk)
723
724ifeq (${AARCH32_SP_MAKE},)
725  $(error Error: No bl32/${AARCH32_SP}/${AARCH32_SP}.mk located)
726endif
727
728$(info Including ${AARCH32_SP_MAKE})
729include ${AARCH32_SP_MAKE}
730endif
731
732endif
733
734################################################################################
735# Include libc if not overridden
736################################################################################
737ifeq (${OVERRIDE_LIBC},0)
738include lib/libc/libc.mk
739endif
740
741################################################################################
742# Check incompatible options
743################################################################################
744
745ifdef EL3_PAYLOAD_BASE
746        ifdef PRELOADED_BL33_BASE
747                $(warning "PRELOADED_BL33_BASE and EL3_PAYLOAD_BASE are \
748                incompatible build options. EL3_PAYLOAD_BASE has priority.")
749        endif
750        ifneq (${GENERATE_COT},0)
751                $(error "GENERATE_COT and EL3_PAYLOAD_BASE are incompatible build options.")
752        endif
753        ifneq (${TRUSTED_BOARD_BOOT},0)
754                $(error "TRUSTED_BOARD_BOOT and EL3_PAYLOAD_BASE are incompatible build options.")
755        endif
756endif
757
758ifeq (${NEED_BL33},yes)
759        ifdef EL3_PAYLOAD_BASE
760                $(warning "BL33 image is not needed when option \
761                BL33_PAYLOAD_BASE is used and won't be added to the FIP file.")
762        endif
763        ifdef PRELOADED_BL33_BASE
764                $(warning "BL33 image is not needed when option \
765                PRELOADED_BL33_BASE is used and won't be added to the FIP \
766                file.")
767        endif
768endif
769
770# When building for systems with hardware-assisted coherency, there's no need to
771# use USE_COHERENT_MEM. Require that USE_COHERENT_MEM must be set to 0 too.
772ifeq ($(HW_ASSISTED_COHERENCY)-$(USE_COHERENT_MEM),1-1)
773$(error USE_COHERENT_MEM cannot be enabled with HW_ASSISTED_COHERENCY)
774endif
775
776#For now, BL2_IN_XIP_MEM is only supported when RESET_TO_BL2 is 1.
777ifeq ($(RESET_TO_BL2)-$(BL2_IN_XIP_MEM),0-1)
778$(error "BL2_IN_XIP_MEM is only supported when RESET_TO_BL2 is enabled")
779endif
780
781# For RAS_EXTENSION, require that EAs are handled in EL3 first
782ifeq ($(RAS_EXTENSION),1)
783    ifneq ($(HANDLE_EA_EL3_FIRST_NS),1)
784        $(error For RAS_EXTENSION, HANDLE_EA_EL3_FIRST_NS must also be 1)
785    endif
786endif
787
788# When FAULT_INJECTION_SUPPORT is used, require that RAS_EXTENSION is enabled
789ifeq ($(FAULT_INJECTION_SUPPORT),1)
790    ifneq ($(RAS_EXTENSION),1)
791        $(error For FAULT_INJECTION_SUPPORT, RAS_EXTENSION must also be 1)
792    endif
793endif
794
795# DYN_DISABLE_AUTH can be set only when TRUSTED_BOARD_BOOT=1
796ifeq ($(DYN_DISABLE_AUTH), 1)
797    ifeq (${TRUSTED_BOARD_BOOT}, 0)
798        $(error "TRUSTED_BOARD_BOOT must be enabled for DYN_DISABLE_AUTH to be set.")
799    endif
800endif
801
802ifeq ($(MEASURED_BOOT)-$(TRUSTED_BOARD_BOOT),1-1)
803# Support authentication verification and hash calculation
804    CRYPTO_SUPPORT := 3
805else ifeq ($(DRTM_SUPPORT)-$(TRUSTED_BOARD_BOOT),1-1)
806# Support authentication verification and hash calculation
807    CRYPTO_SUPPORT := 3
808else ifneq ($(filter 1,${MEASURED_BOOT} ${DRTM_SUPPORT}),)
809# Support hash calculation only
810    CRYPTO_SUPPORT := 2
811else ifeq (${TRUSTED_BOARD_BOOT},1)
812# Support authentication verification only
813    CRYPTO_SUPPORT := 1
814else
815    CRYPTO_SUPPORT := 0
816endif
817
818# SDEI_IN_FCONF is only supported when SDEI_SUPPORT is enabled.
819ifeq ($(SDEI_SUPPORT)-$(SDEI_IN_FCONF),0-1)
820$(error "SDEI_IN_FCONF is only supported when SDEI_SUPPORT is enabled")
821endif
822
823# If pointer authentication is used in the firmware, make sure that all the
824# registers associated to it are also saved and restored.
825# Not doing it would leak the value of the keys used by EL3 to EL1 and S-EL1.
826ifeq ($(ENABLE_PAUTH),1)
827    ifeq ($(CTX_INCLUDE_PAUTH_REGS),0)
828        $(error Pointer Authentication requires CTX_INCLUDE_PAUTH_REGS=1)
829    endif
830endif
831
832ifeq ($(CTX_INCLUDE_PAUTH_REGS),1)
833    ifneq (${ARCH},aarch64)
834        $(error CTX_INCLUDE_PAUTH_REGS requires AArch64)
835    endif
836endif
837
838ifeq ($(CTX_INCLUDE_MTE_REGS),1)
839    ifneq (${ARCH},aarch64)
840        $(error CTX_INCLUDE_MTE_REGS requires AArch64)
841    endif
842endif
843
844ifeq ($(PSA_FWU_SUPPORT),1)
845    $(info PSA_FWU_SUPPORT is an experimental feature)
846endif
847
848ifeq ($(FEATURE_DETECTION),1)
849    $(info FEATURE_DETECTION is an experimental feature)
850endif
851
852ifeq (${ARM_XLAT_TABLES_LIB_V1}, 1)
853    ifeq (${ALLOW_RO_XLAT_TABLES}, 1)
854        $(error "ALLOW_RO_XLAT_TABLES requires translation tables library v2")
855    endif
856endif
857
858ifneq (${DECRYPTION_SUPPORT},none)
859    ifeq (${TRUSTED_BOARD_BOOT}, 0)
860        $(error TRUSTED_BOARD_BOOT must be enabled for DECRYPTION_SUPPORT to be set)
861    endif
862endif
863
864# Ensure that no Aarch64-only features are enabled in Aarch32 build
865ifeq (${ARCH},aarch32)
866
867    # SME/SVE only supported on AArch64
868    ifeq (${ENABLE_SME_FOR_NS},1)
869        $(error "ENABLE_SME_FOR_NS cannot be used with ARCH=aarch32")
870    endif
871    ifeq (${ENABLE_SVE_FOR_NS},1)
872        # Warning instead of error due to CI dependency on this
873        $(error "ENABLE_SVE_FOR_NS cannot be used with ARCH=aarch32")
874    endif
875
876    # BRBE is not supported in AArch32
877    ifeq (${ENABLE_BRBE_FOR_NS},1)
878        $(error "ENABLE_BRBE_FOR_NS cannot be used with ARCH=aarch32")
879    endif
880
881    # FEAT_RNG_TRAP is not supported in AArch32
882    ifeq (${ENABLE_FEAT_RNG_TRAP},1)
883        $(error "ENABLE_FEAT_RNG_TRAP cannot be used with ARCH=aarch32")
884    endif
885endif
886
887# Ensure ENABLE_RME is not used with SME
888ifeq (${ENABLE_RME},1)
889    ifeq (${ENABLE_SME_FOR_NS},1)
890        $(error "ENABLE_SME_FOR_NS cannot be used with ENABLE_RME")
891    endif
892endif
893
894# Secure SME/SVE requires the non-secure component as well
895ifeq (${ENABLE_SME_FOR_SWD},1)
896    ifeq (${ENABLE_SME_FOR_NS},0)
897        $(error "ENABLE_SME_FOR_SWD requires ENABLE_SME_FOR_NS")
898    endif
899endif
900ifeq (${ENABLE_SVE_FOR_SWD},1)
901    ifeq (${ENABLE_SVE_FOR_NS},0)
902        $(error "ENABLE_SVE_FOR_SWD requires ENABLE_SVE_FOR_NS")
903    endif
904endif
905
906# SVE and SME cannot be used with CTX_INCLUDE_FPREGS since secure manager does
907# its own context management including FPU registers.
908ifeq (${CTX_INCLUDE_FPREGS},1)
909    ifeq (${ENABLE_SME_FOR_NS},1)
910        $(error "ENABLE_SME_FOR_NS cannot be used with CTX_INCLUDE_FPREGS")
911    endif
912    ifeq (${ENABLE_SVE_FOR_NS},1)
913        # Warning instead of error due to CI dependency on this
914        $(warning "ENABLE_SVE_FOR_NS cannot be used with CTX_INCLUDE_FPREGS")
915        $(warning "Forced ENABLE_SVE_FOR_NS=0")
916        override ENABLE_SVE_FOR_NS	:= 0
917    endif
918endif
919
920ifeq ($(DRTM_SUPPORT),1)
921    $(info DRTM_SUPPORT is an experimental feature)
922endif
923
924ifeq (${ENABLE_RME},1)
925    ifneq (${SEPARATE_CODE_AND_RODATA},1)
926        $(error `ENABLE_RME=1` requires `SEPARATE_CODE_AND_RODATA=1`)
927    endif
928endif
929
930################################################################################
931# Process platform overrideable behaviour
932################################################################################
933
934ifdef BL1_SOURCES
935NEED_BL1 := yes
936endif
937
938ifdef BL2_SOURCES
939	NEED_BL2 := yes
940
941	# Using BL2 implies that a BL33 image also needs to be supplied for the FIP and
942	# Certificate generation tools. This flag can be overridden by the platform.
943	ifdef EL3_PAYLOAD_BASE
944                # If booting an EL3 payload there is no need for a BL33 image
945                # in the FIP file.
946                NEED_BL33		:=	no
947        else
948                ifdef PRELOADED_BL33_BASE
949                        # If booting a BL33 preloaded image there is no need of
950                        # another one in the FIP file.
951                        NEED_BL33		:=	no
952                else
953                        NEED_BL33		?=	yes
954                endif
955        endif
956endif
957
958ifdef BL2U_SOURCES
959NEED_BL2U := yes
960endif
961
962# If SCP_BL2 is given, we always want FIP to include it.
963ifdef SCP_BL2
964        NEED_SCP_BL2		:=	yes
965endif
966
967# For AArch32, BL31 is not currently supported.
968ifneq (${ARCH},aarch32)
969    ifdef BL31_SOURCES
970        # When booting an EL3 payload, there is no need to compile the BL31 image nor
971        # put it in the FIP.
972        ifndef EL3_PAYLOAD_BASE
973            NEED_BL31 := yes
974        endif
975    endif
976endif
977
978# Process TBB related flags
979ifneq (${GENERATE_COT},0)
980        # Common cert_create options
981        ifneq (${CREATE_KEYS},0)
982                $(eval CRT_ARGS += -n)
983                $(eval FWU_CRT_ARGS += -n)
984                ifneq (${SAVE_KEYS},0)
985                        $(eval CRT_ARGS += -k)
986                        $(eval FWU_CRT_ARGS += -k)
987                endif
988        endif
989        # Include TBBR makefile (unless the platform indicates otherwise)
990        ifeq (${INCLUDE_TBBR_MK},1)
991                include make_helpers/tbbr/tbbr_tools.mk
992        endif
993endif
994
995ifneq (${FIP_ALIGN},0)
996FIP_ARGS += --align ${FIP_ALIGN}
997endif
998
999ifdef FDT_SOURCES
1000NEED_FDT := yes
1001endif
1002
1003################################################################################
1004# Include libraries' Makefile that are used in all BL
1005################################################################################
1006
1007include lib/stack_protector/stack_protector.mk
1008
1009################################################################################
1010# Auxiliary tools (fiptool, cert_create, etc)
1011################################################################################
1012
1013# Variables for use with Certificate Generation Tool
1014CRTTOOLPATH		?=	tools/cert_create
1015CRTTOOL			?=	${CRTTOOLPATH}/cert_create${BIN_EXT}
1016
1017# Variables for use with Firmware Encryption Tool
1018ENCTOOLPATH		?=	tools/encrypt_fw
1019ENCTOOL			?=	${ENCTOOLPATH}/encrypt_fw${BIN_EXT}
1020
1021# Variables for use with Firmware Image Package
1022FIPTOOLPATH		?=	tools/fiptool
1023FIPTOOL			?=	${FIPTOOLPATH}/fiptool${BIN_EXT}
1024
1025# Variables for use with sptool
1026SPTOOLPATH		?=	tools/sptool
1027SPTOOL			?=	${SPTOOLPATH}/sptool.py
1028SP_MK_GEN		?=	${SPTOOLPATH}/sp_mk_generator.py
1029
1030# Variables for use with ROMLIB
1031ROMLIBPATH		?=	lib/romlib
1032
1033# Variable for use with Python
1034PYTHON			?=	python3
1035
1036# Variables for use with PRINT_MEMORY_MAP
1037PRINT_MEMORY_MAP_PATH		?=	tools/memory
1038PRINT_MEMORY_MAP		?=	${PRINT_MEMORY_MAP_PATH}/print_memory_map.py
1039
1040# Variables for use with documentation build using Sphinx tool
1041DOCS_PATH		?=	docs
1042
1043# Defination of SIMICS flag
1044SIMICS_BUILD	?=	0
1045
1046################################################################################
1047# Include BL specific makefiles
1048################################################################################
1049
1050ifeq (${NEED_BL1},yes)
1051include bl1/bl1.mk
1052endif
1053
1054ifeq (${NEED_BL2},yes)
1055include bl2/bl2.mk
1056endif
1057
1058ifeq (${NEED_BL2U},yes)
1059include bl2u/bl2u.mk
1060endif
1061
1062ifeq (${NEED_BL31},yes)
1063include bl31/bl31.mk
1064endif
1065
1066################################################################################
1067# Build options checks
1068################################################################################
1069
1070$(eval $(call assert_booleans,\
1071    $(sort \
1072        ALLOW_RO_XLAT_TABLES \
1073        BL2_ENABLE_SP_LOAD \
1074        COLD_BOOT_SINGLE_CPU \
1075        CREATE_KEYS \
1076        CTX_INCLUDE_AARCH32_REGS \
1077        CTX_INCLUDE_FPREGS \
1078        CTX_INCLUDE_EL2_REGS \
1079        DEBUG \
1080        DISABLE_MTPMU \
1081        DYN_DISABLE_AUTH \
1082        EL3_EXCEPTION_HANDLING \
1083        ENABLE_AMU \
1084        ENABLE_AMU_AUXILIARY_COUNTERS \
1085        ENABLE_AMU_FCONF \
1086        AMU_RESTRICT_COUNTERS \
1087        ENABLE_ASSERTIONS \
1088        ENABLE_PIE \
1089        ENABLE_PMF \
1090        ENABLE_PSCI_STAT \
1091        ENABLE_RUNTIME_INSTRUMENTATION \
1092        ENABLE_SME_FOR_NS \
1093        ENABLE_SME_FOR_SWD \
1094        ENABLE_SPE_FOR_LOWER_ELS \
1095        ENABLE_SVE_FOR_NS \
1096        ENABLE_SVE_FOR_SWD \
1097        ERROR_DEPRECATED \
1098        FAULT_INJECTION_SUPPORT \
1099        GENERATE_COT \
1100        GICV2_G0_FOR_EL3 \
1101        HANDLE_EA_EL3_FIRST_NS \
1102        HW_ASSISTED_COHERENCY \
1103        INVERTED_MEMMAP \
1104        MEASURED_BOOT \
1105        DRTM_SUPPORT \
1106        NS_TIMER_SWITCH \
1107        OVERRIDE_LIBC \
1108        PL011_GENERIC_UART \
1109        PLAT_RSS_NOT_SUPPORTED \
1110        PROGRAMMABLE_RESET_ADDRESS \
1111        PSCI_EXTENDED_STATE_ID \
1112        RESET_TO_BL31 \
1113        RESET_TO_BL31_WITH_PARAMS \
1114        SAVE_KEYS \
1115        SEPARATE_CODE_AND_RODATA \
1116        SEPARATE_BL2_NOLOAD_REGION \
1117        SEPARATE_NOBITS_REGION \
1118        SPIN_ON_BL1_EXIT \
1119        SPM_MM \
1120        SPMC_AT_EL3 \
1121        SPMD_SPM_AT_SEL2 \
1122        TRUSTED_BOARD_BOOT \
1123        USE_COHERENT_MEM \
1124        USE_DEBUGFS \
1125        ARM_IO_IN_DTB \
1126        SDEI_IN_FCONF \
1127        SEC_INT_DESC_IN_FCONF \
1128        USE_ROMLIB \
1129        USE_TBBR_DEFS \
1130        WARMBOOT_ENABLE_DCACHE_EARLY \
1131        RESET_TO_BL2 \
1132        BL2_IN_XIP_MEM \
1133        BL2_INV_DCACHE \
1134        USE_SPINLOCK_CAS \
1135        ENCRYPT_BL31 \
1136        ENCRYPT_BL32 \
1137        ERRATA_SPECULATIVE_AT \
1138        RAS_TRAP_NS_ERR_REC_ACCESS \
1139        COT_DESC_IN_DTB \
1140        USE_SP804_TIMER \
1141        PSA_FWU_SUPPORT \
1142        ENABLE_SYS_REG_TRACE_FOR_NS \
1143        ENABLE_MPMM \
1144        ENABLE_MPMM_FCONF \
1145        SIMICS_BUILD \
1146        FEATURE_DETECTION \
1147	TRNG_SUPPORT \
1148	CONDITIONAL_CMO \
1149)))
1150
1151$(eval $(call assert_numerics,\
1152    $(sort \
1153        ARM_ARCH_MAJOR \
1154        ARM_ARCH_MINOR \
1155        BRANCH_PROTECTION \
1156        CTX_INCLUDE_PAUTH_REGS \
1157        CTX_INCLUDE_MTE_REGS \
1158        CTX_INCLUDE_NEVE_REGS \
1159        CRYPTO_SUPPORT \
1160        ENABLE_BRBE_FOR_NS \
1161        ENABLE_TRBE_FOR_NS \
1162        ENABLE_BTI \
1163        ENABLE_PAUTH \
1164        ENABLE_FEAT_AMUv1 \
1165        ENABLE_FEAT_AMUv1p1 \
1166        ENABLE_FEAT_CSV2_2 \
1167        ENABLE_FEAT_DIT \
1168        ENABLE_FEAT_ECV \
1169        ENABLE_FEAT_FGT \
1170        ENABLE_FEAT_HCX \
1171        ENABLE_FEAT_PAN \
1172        ENABLE_FEAT_RNG \
1173        ENABLE_FEAT_RNG_TRAP \
1174        ENABLE_FEAT_SB \
1175        ENABLE_FEAT_SEL2 \
1176        ENABLE_FEAT_VHE \
1177        ENABLE_MPAM_FOR_LOWER_ELS \
1178        ENABLE_RME \
1179        ENABLE_TRF_FOR_NS \
1180        FW_ENC_STATUS \
1181        NR_OF_FW_BANKS \
1182        NR_OF_IMAGES_IN_FW_BANK \
1183        RAS_EXTENSION \
1184        TWED_DELAY \
1185        ENABLE_FEAT_TWED \
1186        SVE_VECTOR_LEN \
1187)))
1188
1189ifdef KEY_SIZE
1190        $(eval $(call assert_numeric,KEY_SIZE))
1191endif
1192
1193ifeq ($(filter $(SANITIZE_UB), on off trap),)
1194        $(error "Invalid value for SANITIZE_UB: can be one of on, off, trap")
1195endif
1196
1197################################################################################
1198# Add definitions to the cpp preprocessor based on the current build options.
1199# This is done after including the platform specific makefile to allow the
1200# platform to overwrite the default options
1201################################################################################
1202
1203$(eval $(call add_defines,\
1204    $(sort \
1205        ALLOW_RO_XLAT_TABLES \
1206        ARM_ARCH_MAJOR \
1207        ARM_ARCH_MINOR \
1208        BL2_ENABLE_SP_LOAD \
1209        COLD_BOOT_SINGLE_CPU \
1210        CTX_INCLUDE_AARCH32_REGS \
1211        CTX_INCLUDE_FPREGS \
1212        CTX_INCLUDE_PAUTH_REGS \
1213        EL3_EXCEPTION_HANDLING \
1214        CTX_INCLUDE_MTE_REGS \
1215        CTX_INCLUDE_EL2_REGS \
1216        CTX_INCLUDE_NEVE_REGS \
1217        DECRYPTION_SUPPORT_${DECRYPTION_SUPPORT} \
1218        DISABLE_MTPMU \
1219        ENABLE_AMU \
1220        ENABLE_AMU_AUXILIARY_COUNTERS \
1221        ENABLE_AMU_FCONF \
1222        AMU_RESTRICT_COUNTERS \
1223        ENABLE_ASSERTIONS \
1224        ENABLE_BTI \
1225        ENABLE_MPAM_FOR_LOWER_ELS \
1226        ENABLE_PAUTH \
1227        ENABLE_PIE \
1228        ENABLE_PMF \
1229        ENABLE_PSCI_STAT \
1230        ENABLE_RME \
1231        ENABLE_RUNTIME_INSTRUMENTATION \
1232        ENABLE_SME_FOR_NS \
1233        ENABLE_SME_FOR_SWD \
1234        ENABLE_SPE_FOR_LOWER_ELS \
1235        ENABLE_SVE_FOR_NS \
1236        ENABLE_SVE_FOR_SWD \
1237        ENCRYPT_BL31 \
1238        ENCRYPT_BL32 \
1239        ERROR_DEPRECATED \
1240        FAULT_INJECTION_SUPPORT \
1241        GICV2_G0_FOR_EL3 \
1242        HANDLE_EA_EL3_FIRST_NS \
1243        HW_ASSISTED_COHERENCY \
1244        LOG_LEVEL \
1245        MEASURED_BOOT \
1246        DRTM_SUPPORT \
1247        NS_TIMER_SWITCH \
1248        PL011_GENERIC_UART \
1249        PLAT_${PLAT} \
1250        PLAT_RSS_NOT_SUPPORTED \
1251        PROGRAMMABLE_RESET_ADDRESS \
1252        PSCI_EXTENDED_STATE_ID \
1253        RAS_EXTENSION \
1254        RESET_TO_BL31 \
1255        RESET_TO_BL31_WITH_PARAMS \
1256        SEPARATE_CODE_AND_RODATA \
1257        SEPARATE_BL2_NOLOAD_REGION \
1258        SEPARATE_NOBITS_REGION \
1259        RECLAIM_INIT_CODE \
1260        SPD_${SPD} \
1261        SPIN_ON_BL1_EXIT \
1262        SPM_MM \
1263        SPMC_AT_EL3 \
1264        SPMD_SPM_AT_SEL2 \
1265        TRUSTED_BOARD_BOOT \
1266        CRYPTO_SUPPORT \
1267        TRNG_SUPPORT \
1268        USE_COHERENT_MEM \
1269        USE_DEBUGFS \
1270        ARM_IO_IN_DTB \
1271        SDEI_IN_FCONF \
1272        SEC_INT_DESC_IN_FCONF \
1273        USE_ROMLIB \
1274        USE_TBBR_DEFS \
1275        WARMBOOT_ENABLE_DCACHE_EARLY \
1276        RESET_TO_BL2 \
1277        BL2_RUNS_AT_EL3	\
1278        BL2_IN_XIP_MEM \
1279        BL2_INV_DCACHE \
1280        USE_SPINLOCK_CAS \
1281        ERRATA_SPECULATIVE_AT \
1282        RAS_TRAP_NS_ERR_REC_ACCESS \
1283        COT_DESC_IN_DTB \
1284        USE_SP804_TIMER \
1285        ENABLE_FEAT_RNG \
1286        ENABLE_FEAT_RNG_TRAP \
1287        ENABLE_FEAT_SB \
1288        ENABLE_FEAT_DIT \
1289        NR_OF_FW_BANKS \
1290        NR_OF_IMAGES_IN_FW_BANK \
1291        PSA_FWU_SUPPORT \
1292        ENABLE_BRBE_FOR_NS \
1293        ENABLE_TRBE_FOR_NS \
1294        ENABLE_SYS_REG_TRACE_FOR_NS \
1295        ENABLE_TRF_FOR_NS \
1296        ENABLE_FEAT_HCX \
1297        ENABLE_MPMM \
1298        ENABLE_MPMM_FCONF \
1299        ENABLE_FEAT_FGT \
1300        ENABLE_FEAT_AMUv1 \
1301        ENABLE_FEAT_ECV \
1302        SIMICS_BUILD \
1303        ENABLE_FEAT_AMUv1p1 \
1304        ENABLE_FEAT_SEL2 \
1305        ENABLE_FEAT_VHE \
1306        ENABLE_FEAT_CSV2_2 \
1307        ENABLE_FEAT_PAN \
1308        FEATURE_DETECTION \
1309        TWED_DELAY \
1310        ENABLE_FEAT_TWED \
1311	CONDITIONAL_CMO \
1312)))
1313
1314ifeq (${SANITIZE_UB},trap)
1315        $(eval $(call add_define,MONITOR_TRAPS))
1316endif
1317
1318# Define the EL3_PAYLOAD_BASE flag only if it is provided.
1319ifdef EL3_PAYLOAD_BASE
1320        $(eval $(call add_define,EL3_PAYLOAD_BASE))
1321else
1322        # Define the PRELOADED_BL33_BASE flag only if it is provided and
1323        # EL3_PAYLOAD_BASE is not defined, as it has priority.
1324        ifdef PRELOADED_BL33_BASE
1325                $(eval $(call add_define,PRELOADED_BL33_BASE))
1326        endif
1327endif
1328
1329# Define the DYN_DISABLE_AUTH flag only if set.
1330ifeq (${DYN_DISABLE_AUTH},1)
1331$(eval $(call add_define,DYN_DISABLE_AUTH))
1332endif
1333
1334ifneq ($(findstring armlink,$(notdir $(LD))),)
1335$(eval $(call add_define,USE_ARM_LINK))
1336endif
1337
1338# Generate and include sp_gen.mk if SPD is spmd and SP_LAYOUT_FILE is defined
1339ifeq (${SPD},spmd)
1340ifdef SP_LAYOUT_FILE
1341        -include $(BUILD_PLAT)/sp_gen.mk
1342        FIP_DEPS += sp
1343        CRT_DEPS += sp
1344        NEED_SP_PKG := yes
1345else
1346        ifeq (${SPMD_SPM_AT_SEL2},1)
1347            $(error "SPMD with SPM at S-EL2 require SP_LAYOUT_FILE")
1348        endif
1349endif
1350endif
1351
1352################################################################################
1353# Build targets
1354################################################################################
1355
1356.PHONY:	all msg_start clean realclean distclean cscope locate-checkpatch checkcodebase checkpatch fiptool sptool fip sp fwu_fip certtool dtbs memmap doc enctool
1357.SUFFIXES:
1358
1359all: msg_start
1360
1361msg_start:
1362	@echo "Building ${PLAT}"
1363
1364ifeq (${ERROR_DEPRECATED},0)
1365# Check if deprecated declarations and cpp warnings should be treated as error or not.
1366ifneq ($(findstring clang,$(notdir $(CC))),)
1367    CPPFLAGS		+= 	-Wno-error=deprecated-declarations
1368else
1369    CPPFLAGS		+= 	-Wno-error=deprecated-declarations -Wno-error=cpp
1370endif
1371endif # !ERROR_DEPRECATED
1372
1373$(eval $(call MAKE_LIB_DIRS))
1374$(eval $(call MAKE_LIB,c))
1375
1376# Expand build macros for the different images
1377ifeq (${NEED_BL1},yes)
1378BL1_SOURCES := $(sort ${BL1_SOURCES})
1379
1380$(eval $(call MAKE_BL,bl1))
1381endif
1382
1383ifeq (${NEED_BL2},yes)
1384ifeq (${RESET_TO_BL2}, 0)
1385FIP_BL2_ARGS := tb-fw
1386endif
1387
1388BL2_SOURCES := $(sort ${BL2_SOURCES})
1389
1390$(if ${BL2}, $(eval $(call TOOL_ADD_IMG,bl2,--${FIP_BL2_ARGS})),\
1391	$(eval $(call MAKE_BL,bl2,${FIP_BL2_ARGS})))
1392endif
1393
1394ifeq (${NEED_SCP_BL2},yes)
1395$(eval $(call TOOL_ADD_IMG,scp_bl2,--scp-fw))
1396endif
1397
1398ifeq (${NEED_BL31},yes)
1399BL31_SOURCES += ${SPD_SOURCES}
1400# Sort BL31 source files to remove duplicates
1401BL31_SOURCES := $(sort ${BL31_SOURCES})
1402ifneq (${DECRYPTION_SUPPORT},none)
1403$(if ${BL31}, $(eval $(call TOOL_ADD_IMG,bl31,--soc-fw,,$(ENCRYPT_BL31))),\
1404	$(eval $(call MAKE_BL,bl31,soc-fw,,$(ENCRYPT_BL31))))
1405else
1406$(if ${BL31}, $(eval $(call TOOL_ADD_IMG,bl31,--soc-fw)),\
1407	$(eval $(call MAKE_BL,bl31,soc-fw)))
1408endif
1409endif
1410
1411# If a BL32 image is needed but neither BL32 nor BL32_SOURCES is defined, the
1412# build system will call TOOL_ADD_IMG to print a warning message and abort the
1413# process. Note that the dependency on BL32 applies to the FIP only.
1414ifeq (${NEED_BL32},yes)
1415# Sort BL32 source files to remove duplicates
1416BL32_SOURCES := $(sort ${BL32_SOURCES})
1417BUILD_BL32 := $(if $(BL32),,$(if $(BL32_SOURCES),1))
1418
1419ifneq (${DECRYPTION_SUPPORT},none)
1420$(if ${BUILD_BL32}, $(eval $(call MAKE_BL,bl32,tos-fw,,$(ENCRYPT_BL32))),\
1421	$(eval $(call TOOL_ADD_IMG,bl32,--tos-fw,,$(ENCRYPT_BL32))))
1422else
1423$(if ${BUILD_BL32}, $(eval $(call MAKE_BL,bl32,tos-fw)),\
1424	$(eval $(call TOOL_ADD_IMG,bl32,--tos-fw)))
1425endif
1426endif
1427
1428# If RMM image is needed but RMM is not defined, Test Realm Payload (TRP)
1429# needs to be built from RMM_SOURCES.
1430ifeq (${NEED_RMM},yes)
1431# Sort RMM source files to remove duplicates
1432RMM_SOURCES := $(sort ${RMM_SOURCES})
1433BUILD_RMM := $(if $(RMM),,$(if $(RMM_SOURCES),1))
1434
1435$(if ${BUILD_RMM}, $(eval $(call MAKE_BL,rmm,rmm-fw)),\
1436         $(eval $(call TOOL_ADD_IMG,rmm,--rmm-fw)))
1437endif
1438
1439# Add the BL33 image if required by the platform
1440ifeq (${NEED_BL33},yes)
1441$(eval $(call TOOL_ADD_IMG,bl33,--nt-fw))
1442endif
1443
1444ifeq (${NEED_BL2U},yes)
1445$(if ${BL2U}, $(eval $(call TOOL_ADD_IMG,bl2u,--ap-fwu-cfg,FWU_)),\
1446	$(eval $(call MAKE_BL,bl2u,ap-fwu-cfg,FWU_)))
1447endif
1448
1449# Expand build macros for the different images
1450ifeq (${NEED_FDT},yes)
1451    $(eval $(call MAKE_DTBS,$(BUILD_PLAT)/fdts,$(FDT_SOURCES)))
1452endif
1453
1454# Add Secure Partition packages
1455ifeq (${NEED_SP_PKG},yes)
1456$(BUILD_PLAT)/sp_gen.mk: ${SP_MK_GEN} ${SP_LAYOUT_FILE} | ${BUILD_PLAT}
1457	${Q}${PYTHON} "$<" "$@" $(filter-out $<,$^) $(BUILD_PLAT) ${COT}
1458sp: $(DTBS) $(BUILD_PLAT)/sp_gen.mk $(SP_PKGS)
1459	@${ECHO_BLANK_LINE}
1460	@echo "Built SP Images successfully"
1461	@${ECHO_BLANK_LINE}
1462endif
1463
1464locate-checkpatch:
1465ifndef CHECKPATCH
1466	$(error "Please set CHECKPATCH to point to the Linux checkpatch.pl file, eg: CHECKPATCH=../linux/scripts/checkpatch.pl")
1467else
1468ifeq (,$(wildcard ${CHECKPATCH}))
1469	$(error "The file CHECKPATCH points to cannot be found, use eg: CHECKPATCH=../linux/scripts/checkpatch.pl")
1470endif
1471endif
1472
1473clean:
1474	@echo "  CLEAN"
1475	$(call SHELL_REMOVE_DIR,${BUILD_PLAT})
1476ifdef UNIX_MK
1477	${Q}${MAKE} --no-print-directory -C ${FIPTOOLPATH} clean
1478else
1479# Clear the MAKEFLAGS as we do not want
1480# to pass the gnumake flags to nmake.
1481	${Q}set MAKEFLAGS= && ${MSVC_NMAKE} /nologo /f ${FIPTOOLPATH}/Makefile.msvc FIPTOOLPATH=$(subst /,\,$(FIPTOOLPATH)) FIPTOOL=$(subst /,\,$(FIPTOOL)) clean
1482endif
1483	${Q}${MAKE} PLAT=${PLAT} --no-print-directory -C ${CRTTOOLPATH} clean
1484	${Q}${MAKE} PLAT=${PLAT} --no-print-directory -C ${ENCTOOLPATH} clean
1485	${Q}${MAKE} --no-print-directory -C ${ROMLIBPATH} clean
1486
1487realclean distclean:
1488	@echo "  REALCLEAN"
1489	$(call SHELL_REMOVE_DIR,${BUILD_BASE})
1490	$(call SHELL_DELETE_ALL, ${CURDIR}/cscope.*)
1491ifdef UNIX_MK
1492	${Q}${MAKE} --no-print-directory -C ${FIPTOOLPATH} clean
1493else
1494# Clear the MAKEFLAGS as we do not want
1495# to pass the gnumake flags to nmake.
1496	${Q}set MAKEFLAGS= && ${MSVC_NMAKE} /nologo /f ${FIPTOOLPATH}/Makefile.msvc FIPTOOLPATH=$(subst /,\,$(FIPTOOLPATH)) FIPTOOL=$(subst /,\,$(FIPTOOL)) realclean
1497endif
1498	${Q}${MAKE} PLAT=${PLAT} --no-print-directory -C ${CRTTOOLPATH} realclean
1499	${Q}${MAKE} PLAT=${PLAT} --no-print-directory -C ${ENCTOOLPATH} realclean
1500	${Q}${MAKE} --no-print-directory -C ${ROMLIBPATH} clean
1501
1502checkcodebase:		locate-checkpatch
1503	@echo "  CHECKING STYLE"
1504	@if test -d .git ; then						\
1505		git ls-files | grep -E -v 'libfdt|libc|docs|\.rst' |	\
1506		while read GIT_FILE ;					\
1507		do ${CHECKPATCH} ${CHECKCODE_ARGS} -f $$GIT_FILE ;	\
1508		done ;							\
1509	else								\
1510		 find . -type f -not -iwholename "*.git*"		\
1511		 -not -iwholename "*build*"				\
1512		 -not -iwholename "*libfdt*"				\
1513		 -not -iwholename "*libc*"				\
1514		 -not -iwholename "*docs*"				\
1515		 -not -iwholename "*.rst"				\
1516		 -exec ${CHECKPATCH} ${CHECKCODE_ARGS} -f {} \; ;	\
1517	fi
1518
1519checkpatch:		locate-checkpatch
1520	@echo "  CHECKING STYLE"
1521	@if test -n "${CHECKPATCH_OPTS}"; then				\
1522		echo "    with ${CHECKPATCH_OPTS} option(s)";		\
1523	fi
1524	${Q}COMMON_COMMIT=$$(git merge-base HEAD ${BASE_COMMIT});	\
1525	for commit in `git rev-list --no-merges $$COMMON_COMMIT..HEAD`;	\
1526	do								\
1527		printf "\n[*] Checking style of '$$commit'\n\n";	\
1528		git log --format=email "$$commit~..$$commit"		\
1529			-- ${CHECK_PATHS} |				\
1530			${CHECKPATCH} ${CHECKPATCH_OPTS} - || true;	\
1531		git diff --format=email "$$commit~..$$commit"		\
1532			-- ${CHECK_PATHS} |				\
1533			${CHECKPATCH}  ${CHECKPATCH_OPTS} - || true;	\
1534	done
1535
1536certtool: ${CRTTOOL}
1537
1538${CRTTOOL}: FORCE
1539	${Q}${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 ${CRTTOOLPATH} all
1540	@${ECHO_BLANK_LINE}
1541	@echo "Built $@ successfully"
1542	@${ECHO_BLANK_LINE}
1543
1544ifneq (${GENERATE_COT},0)
1545certificates: ${CRT_DEPS} ${CRTTOOL}
1546	${Q}${CRTTOOL} ${CRT_ARGS}
1547	@${ECHO_BLANK_LINE}
1548	@echo "Built $@ successfully"
1549	@echo "Certificates can be found in ${BUILD_PLAT}"
1550	@${ECHO_BLANK_LINE}
1551endif
1552
1553${BUILD_PLAT}/${FIP_NAME}: ${FIP_DEPS} ${FIPTOOL}
1554	$(eval ${CHECK_FIP_CMD})
1555	${Q}${FIPTOOL} create ${FIP_ARGS} $@
1556	${Q}${FIPTOOL} info $@
1557	@${ECHO_BLANK_LINE}
1558	@echo "Built $@ successfully"
1559	@${ECHO_BLANK_LINE}
1560
1561ifneq (${GENERATE_COT},0)
1562fwu_certificates: ${FWU_CRT_DEPS} ${CRTTOOL}
1563	${Q}${CRTTOOL} ${FWU_CRT_ARGS}
1564	@${ECHO_BLANK_LINE}
1565	@echo "Built $@ successfully"
1566	@echo "FWU certificates can be found in ${BUILD_PLAT}"
1567	@${ECHO_BLANK_LINE}
1568endif
1569
1570${BUILD_PLAT}/${FWU_FIP_NAME}: ${FWU_FIP_DEPS} ${FIPTOOL}
1571	$(eval ${CHECK_FWU_FIP_CMD})
1572	${Q}${FIPTOOL} create ${FWU_FIP_ARGS} $@
1573	${Q}${FIPTOOL} info $@
1574	@${ECHO_BLANK_LINE}
1575	@echo "Built $@ successfully"
1576	@${ECHO_BLANK_LINE}
1577
1578fiptool: ${FIPTOOL}
1579fip: ${BUILD_PLAT}/${FIP_NAME}
1580fwu_fip: ${BUILD_PLAT}/${FWU_FIP_NAME}
1581
1582${FIPTOOL}: FORCE
1583ifdef UNIX_MK
1584	${Q}${MAKE} CPPFLAGS="-DVERSION='\"${VERSION_STRING}\"'" FIPTOOL=${FIPTOOL} OPENSSL_DIR=${OPENSSL_DIR} DEBUG=${DEBUG} V=${V} --no-print-directory -C ${FIPTOOLPATH} all
1585else
1586# Clear the MAKEFLAGS as we do not want
1587# to pass the gnumake flags to nmake.
1588	${Q}set MAKEFLAGS= && ${MSVC_NMAKE} /nologo /f ${FIPTOOLPATH}/Makefile.msvc FIPTOOLPATH=$(subst /,\,$(FIPTOOLPATH)) FIPTOOL=$(subst /,\,$(FIPTOOL))
1589endif
1590
1591romlib.bin: libraries FORCE
1592	${Q}${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
1593
1594# Call print_memory_map tool
1595memmap: all
1596	${Q}${PYTHON} ${PRINT_MEMORY_MAP} ${BUILD_PLAT} ${INVERTED_MEMMAP}
1597
1598doc:
1599	@echo "  BUILD DOCUMENTATION"
1600	${Q}${MAKE} --no-print-directory -C ${DOCS_PATH} html
1601
1602enctool: ${ENCTOOL}
1603
1604${ENCTOOL}: FORCE
1605	${Q}${MAKE} PLAT=${PLAT} BUILD_INFO=0 OPENSSL_DIR=${OPENSSL_DIR} ENCTOOL=${ENCTOOL} DEBUG=${DEBUG} V=${V} --no-print-directory -C ${ENCTOOLPATH} all
1606	@${ECHO_BLANK_LINE}
1607	@echo "Built $@ successfully"
1608	@${ECHO_BLANK_LINE}
1609
1610cscope:
1611	@echo "  CSCOPE"
1612	${Q}find ${CURDIR} -name "*.[chsS]" > cscope.files
1613	${Q}cscope -b -q -k
1614
1615help:
1616	@echo "usage: ${MAKE} [PLAT=<platform>] [OPTIONS] [TARGET]"
1617	@echo ""
1618	@echo "PLAT is used to specify which platform you wish to build."
1619	@echo "If no platform is specified, PLAT defaults to: ${DEFAULT_PLAT}"
1620	@echo ""
1621	@echo "platform = ${PLATFORM_LIST}"
1622	@echo ""
1623	@echo "Please refer to the User Guide for a list of all supported options."
1624	@echo "Note that the build system doesn't track dependencies for build "
1625	@echo "options. Therefore, if any of the build options are changed "
1626	@echo "from a previous build, a clean build must be performed."
1627	@echo ""
1628	@echo "Supported Targets:"
1629	@echo "  all            Build all individual bootloader binaries"
1630	@echo "  bl1            Build the BL1 binary"
1631	@echo "  bl2            Build the BL2 binary"
1632	@echo "  bl2u           Build the BL2U binary"
1633	@echo "  bl31           Build the BL31 binary"
1634	@echo "  bl32           Build the BL32 binary. If ARCH=aarch32, then "
1635	@echo "                 this builds secure payload specified by AARCH32_SP"
1636	@echo "  certificates   Build the certificates (requires 'GENERATE_COT=1')"
1637	@echo "  fip            Build the Firmware Image Package (FIP)"
1638	@echo "  fwu_fip        Build the FWU Firmware Image Package (FIP)"
1639	@echo "  checkcodebase  Check the coding style of the entire source tree"
1640	@echo "  checkpatch     Check the coding style on changes in the current"
1641	@echo "                 branch against BASE_COMMIT (default origin/master)"
1642	@echo "  clean          Clean the build for the selected platform"
1643	@echo "  cscope         Generate cscope index"
1644	@echo "  distclean      Remove all build artifacts for all platforms"
1645	@echo "  certtool       Build the Certificate generation tool"
1646	@echo "  enctool        Build the Firmware encryption tool"
1647	@echo "  fiptool        Build the Firmware Image Package (FIP) creation tool"
1648	@echo "  sp             Build the Secure Partition Packages"
1649	@echo "  sptool         Build the Secure Partition Package creation tool"
1650	@echo "  dtbs           Build the Device Tree Blobs (if required for the platform)"
1651	@echo "  memmap         Print the memory map of the built binaries"
1652	@echo "  doc            Build html based documentation using Sphinx tool"
1653	@echo ""
1654	@echo "Note: most build targets require PLAT to be set to a specific platform."
1655	@echo ""
1656	@echo "example: build all targets for the FVP platform:"
1657	@echo "  CROSS_COMPILE=aarch64-none-elf- make PLAT=fvp all"
1658
1659.PHONY: FORCE
1660FORCE:;
1661