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Achin Gupta4f6ad662013-10-25 09:08:21 +01001#
Jeenu Viswambharand5ec3672017-01-03 11:01:51 +00002# Copyright (c) 2013-2017, ARM Limited and Contributors. All rights reserved.
Achin Gupta4f6ad662013-10-25 09:08:21 +01003#
4# Redistribution and use in source and binary forms, with or without
5# modification, are permitted provided that the following conditions are met:
6#
7# Redistributions of source code must retain the above copyright notice, this
8# list of conditions and the following disclaimer.
9#
10# Redistributions in binary form must reproduce the above copyright notice,
11# this list of conditions and the following disclaimer in the documentation
12# and/or other materials provided with the distribution.
13#
14# Neither the name of ARM nor the names of its contributors may be used
15# to endorse or promote products derived from this software without specific
16# prior written permission.
17#
18# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
22# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28# POSSIBILITY OF SUCH DAMAGE.
29#
30
Jeenu Viswambharan19a0ace2014-05-15 14:40:58 +010031#
Juan Castillo04be3a52014-06-30 11:41:46 +010032# Trusted Firmware Version
33#
Juan Castilloa3487d12015-08-18 14:23:04 +010034VERSION_MAJOR := 1
David Cunado485b1ca2016-10-04 16:06:37 +010035VERSION_MINOR := 3
Juan Castillo04be3a52014-06-30 11:41:46 +010036
Juan Castillo396644b2015-10-22 11:34:44 +010037# Default goal is build all images
38.DEFAULT_GOAL := all
39
Douglas Raillard527cd902016-12-28 14:47:50 +000040# Avoid any implicit propagation of command line variable definitions to
41# sub-Makefiles, like CFLAGS that we reserved for the firmware images'
42# usage. Other command line options like "-s" are still propagated as usual.
43MAKEOVERRIDES =
44
Evan Lloydf2697142015-12-02 18:17:37 +000045MAKE_HELPERS_DIRECTORY := make_helpers/
46include ${MAKE_HELPERS_DIRECTORY}build_macros.mk
Evan Lloyda71d2592015-12-02 18:56:06 +000047include ${MAKE_HELPERS_DIRECTORY}build_env.mk
Juan Castilloa3487d12015-08-18 14:23:04 +010048
49################################################################################
Jeenu Viswambharan615ff392016-10-24 14:31:51 +010050# Default values for build configurations, and their dependencies
Juan Castilloa3487d12015-08-18 14:23:04 +010051################################################################################
Jeenu Viswambharan19a0ace2014-05-15 14:40:58 +010052
Jeenu Viswambharan615ff392016-10-24 14:31:51 +010053include ${MAKE_HELPERS_DIRECTORY}defaults.mk
dp-arm3cac7862016-09-19 11:18:44 +010054
Jeenu Viswambharan615ff392016-10-24 14:31:51 +010055# ASM_ASSERTION enabled for DEBUG builds only
56ASM_ASSERTION := ${DEBUG}
57ENABLE_PMF := ${ENABLE_RUNTIME_INSTRUMENTATION}
58PLAT := ${DEFAULT_PLAT}
Achin Gupta4f6ad662013-10-25 09:08:21 +010059
Juan Castilloa3487d12015-08-18 14:23:04 +010060################################################################################
61# Checkpatch script options
62################################################################################
63
Sandrine Bailleux0b5a1582016-06-02 11:19:59 +010064CHECKCODE_ARGS := --no-patch
Dan Handleyd7b59e42016-06-02 17:15:13 +010065# Do not check the coding style on imported library files or documentation files
66INC_LIB_DIRS_TO_CHECK := $(sort $(filter-out \
Dan Handley3a355712016-06-02 18:21:02 +010067 include/lib/libfdt \
Dan Handleyd7b59e42016-06-02 17:15:13 +010068 include/lib/stdlib, \
69 $(wildcard include/lib/*)))
70INC_DIRS_TO_CHECK := $(sort $(filter-out \
71 include/lib, \
72 $(wildcard include/*)))
73LIB_DIRS_TO_CHECK := $(sort $(filter-out \
Antonio Nino Diazd84f88e2017-01-16 17:20:45 +000074 lib/libfdt% \
Dan Handleyd7b59e42016-06-02 17:15:13 +010075 lib/stdlib, \
76 $(wildcard lib/*)))
77ROOT_DIRS_TO_CHECK := $(sort $(filter-out \
78 lib \
79 include \
80 docs \
81 %.md, \
82 $(wildcard *)))
83CHECK_PATHS := ${ROOT_DIRS_TO_CHECK} \
84 ${INC_DIRS_TO_CHECK} \
85 ${INC_LIB_DIRS_TO_CHECK} \
86 ${LIB_DIRS_TO_CHECK}
Ian Spray36eaaf32014-01-30 17:25:28 +000087
Juan Castilloa3487d12015-08-18 14:23:04 +010088
89################################################################################
90# Process build options
91################################################################################
92
93# Verbose flag
Jeenu Viswambharan19a0ace2014-05-15 14:40:58 +010094ifeq (${V},0)
Evan Lloydf4ba5ca2015-12-03 09:47:51 +000095 Q:=@
Juan Castilloa3487d12015-08-18 14:23:04 +010096 CHECKCODE_ARGS += --no-summary --terse
Achin Gupta4f6ad662013-10-25 09:08:21 +010097else
Evan Lloydf4ba5ca2015-12-03 09:47:51 +000098 Q:=
Achin Gupta4f6ad662013-10-25 09:08:21 +010099endif
Jeenu Viswambharan2f2cef42014-02-19 09:38:18 +0000100export Q
101
Juan Castilloa3487d12015-08-18 14:23:04 +0100102# Process Debug flag
103$(eval $(call add_define,DEBUG))
James Morrisseyeaaeece2013-11-01 13:56:59 +0000104ifneq (${DEBUG}, 0)
Juan Castilloa3487d12015-08-18 14:23:04 +0100105 BUILD_TYPE := debug
Sandrine Bailleuxf5fdbcc2016-04-11 13:01:17 +0100106 TF_CFLAGS += -g
Juan Castilloa3487d12015-08-18 14:23:04 +0100107 ASFLAGS += -g -Wa,--gdwarf-2
108 # Use LOG_LEVEL_INFO by default for debug builds
109 LOG_LEVEL := 40
James Morrisseyeaaeece2013-11-01 13:56:59 +0000110else
Juan Castilloa3487d12015-08-18 14:23:04 +0100111 BUILD_TYPE := release
112 $(eval $(call add_define,NDEBUG))
113 # Use LOG_LEVEL_NOTICE by default for release builds
114 LOG_LEVEL := 20
James Morrisseyeaaeece2013-11-01 13:56:59 +0000115endif
116
Juan Castillo04be3a52014-06-30 11:41:46 +0100117# Default build string (git branch and commit)
118ifeq (${BUILD_STRING},)
Masahiro Yamadaf10adde2017-02-03 11:47:27 +0900119 BUILD_STRING := $(shell git describe --always --dirty --tags 2> /dev/null)
Juan Castillo04be3a52014-06-30 11:41:46 +0100120endif
Juan Castillo04be3a52014-06-30 11:41:46 +0100121VERSION_STRING := v${VERSION_MAJOR}.${VERSION_MINOR}(${BUILD_TYPE}):${BUILD_STRING}
122
Juan Castilloa3487d12015-08-18 14:23:04 +0100123# The cert_create tool cannot generate certificates individually, so we use the
124# target 'certificates' to create them all
125ifneq (${GENERATE_COT},0)
126 FIP_DEPS += certificates
Yatharth Kochard1a93432015-10-12 12:33:47 +0100127 FWU_FIP_DEPS += fwu_certificates
Juan Castilloa3487d12015-08-18 14:23:04 +0100128endif
129
130
131################################################################################
132# Toolchain
133################################################################################
134
135CC := ${CROSS_COMPILE}gcc
136CPP := ${CROSS_COMPILE}cpp
137AS := ${CROSS_COMPILE}gcc
138AR := ${CROSS_COMPILE}ar
139LD := ${CROSS_COMPILE}ld
140OC := ${CROSS_COMPILE}objcopy
141OD := ${CROSS_COMPILE}objdump
142NM := ${CROSS_COMPILE}nm
143PP := ${CROSS_COMPILE}gcc -E
144
Soby Mathewa1941252016-05-05 14:33:33 +0100145ASFLAGS_aarch64 = -mgeneral-regs-only
146TF_CFLAGS_aarch64 = -mgeneral-regs-only -mstrict-align
147
148ASFLAGS_aarch32 = -march=armv8-a
149TF_CFLAGS_aarch32 = -march=armv8-a
150
Masahiro Yamada0dec9fa2016-12-22 12:51:53 +0900151CPPFLAGS = ${DEFINES} ${INCLUDES} -nostdinc \
152 -Wmissing-include-dirs -Werror
153ASFLAGS += $(CPPFLAGS) $(ASFLAGS_$(ARCH)) \
154 -D__ASSEMBLY__ -ffreestanding \
155 -Wa,--fatal-warnings
156TF_CFLAGS += $(CPPFLAGS) $(TF_CFLAGS_$(ARCH)) \
Douglas Raillard72f572f2017-01-16 11:32:28 +0000157 -ffreestanding -fno-builtin -Wall -std=c99 -Os \
Masahiro Yamada0dec9fa2016-12-22 12:51:53 +0900158 -ffunction-sections -fdata-sections
Juan Castilloa3487d12015-08-18 14:23:04 +0100159
160LDFLAGS += --fatal-warnings -O1
161LDFLAGS += --gc-sections
162
163
164################################################################################
165# Common sources and include directories
166################################################################################
Dan Handleyd7b59e42016-06-02 17:15:13 +0100167include lib/stdlib/stdlib.mk
Juan Castilloa3487d12015-08-18 14:23:04 +0100168
169BL_COMMON_SOURCES += common/bl_common.c \
Soby Mathewafe7e2f2014-06-12 17:23:58 +0100170 common/tf_printf.c \
Soby Mathewa1941252016-05-05 14:33:33 +0100171 common/${ARCH}/debug.S \
172 lib/${ARCH}/cache_helpers.S \
173 lib/${ARCH}/misc_helpers.S \
174 plat/common/${ARCH}/platform_helpers.S \
Dan Handleyd7b59e42016-06-02 17:15:13 +0100175 ${STDLIB_SRCS}
Ryan Harkind7a6b0f2014-01-13 14:40:13 +0000176
Soby Mathew0d786072016-03-24 16:56:29 +0000177INCLUDES += -Iinclude/bl1 \
178 -Iinclude/bl31 \
179 -Iinclude/common \
Soby Mathewa1941252016-05-05 14:33:33 +0100180 -Iinclude/common/${ARCH} \
Soby Mathew0d786072016-03-24 16:56:29 +0000181 -Iinclude/drivers \
182 -Iinclude/drivers/arm \
183 -Iinclude/drivers/auth \
184 -Iinclude/drivers/io \
185 -Iinclude/drivers/ti/uart \
186 -Iinclude/lib \
Soby Mathewa1941252016-05-05 14:33:33 +0100187 -Iinclude/lib/${ARCH} \
Jeenu Viswambharand5ec3672017-01-03 11:01:51 +0000188 -Iinclude/lib/cpus \
Soby Mathewa1941252016-05-05 14:33:33 +0100189 -Iinclude/lib/cpus/${ARCH} \
Soby Mathew0d786072016-03-24 16:56:29 +0000190 -Iinclude/lib/el3_runtime \
Soby Mathewa1941252016-05-05 14:33:33 +0100191 -Iinclude/lib/el3_runtime/${ARCH} \
dp-arm6419ea32016-08-15 10:33:08 +0100192 -Iinclude/lib/pmf \
Soby Mathew0d786072016-03-24 16:56:29 +0000193 -Iinclude/lib/psci \
194 -Iinclude/plat/common \
195 -Iinclude/services \
196 ${PLAT_INCLUDES} \
Juan Castilloa3487d12015-08-18 14:23:04 +0100197 ${SPD_INCLUDES}
198
199
200################################################################################
201# Generic definitions
202################################################################################
203
Evan Lloydf2697142015-12-02 18:17:37 +0000204include ${MAKE_HELPERS_DIRECTORY}plat_helpers.mk
205
Ryan Harkin25cff832014-01-13 12:37:03 +0000206BUILD_BASE := ./build
207BUILD_PLAT := ${BUILD_BASE}/${PLAT}/${BUILD_TYPE}
Achin Gupta4f6ad662013-10-25 09:08:21 +0100208
Evan Lloydf2697142015-12-02 18:17:37 +0000209SPDS := $(sort $(filter-out none, $(patsubst services/spd/%,%,$(wildcard services/spd/*))))
Ryan Harkin72ee3312014-01-15 16:55:07 +0000210
Juan Castilloa3487d12015-08-18 14:23:04 +0100211# Platforms providing their own TBB makefile may override this value
212INCLUDE_TBBR_MK := 1
213
Jeenu Viswambharane5c39fd2014-05-16 11:38:10 +0100214
Juan Castilloa3487d12015-08-18 14:23:04 +0100215################################################################################
216# Include SPD Makefile if one has been specified
217################################################################################
218
219ifneq (${SPD},none)
Soby Mathewa1941252016-05-05 14:33:33 +0100220ifeq (${ARCH},aarch32)
221 $(error "Error: SPD is incompatible with AArch32.")
222endif
Sandrine Bailleux03897bb2015-11-26 16:31:34 +0000223ifdef EL3_PAYLOAD_BASE
224 $(warning "SPD and EL3_PAYLOAD_BASE are incompatible build options.")
225 $(warning "The SPD and its BL32 companion will be present but ignored.")
226endif
Juan Castilloa3487d12015-08-18 14:23:04 +0100227 # We expect to locate an spd.mk under the specified SPD directory
Evan Lloydf2697142015-12-02 18:17:37 +0000228 SPD_MAKE := $(wildcard services/spd/${SPD}/${SPD}.mk)
Juan Castilloa3487d12015-08-18 14:23:04 +0100229
230 ifeq (${SPD_MAKE},)
231 $(error Error: No services/spd/${SPD}/${SPD}.mk located)
232 endif
233 $(info Including ${SPD_MAKE})
234 include ${SPD_MAKE}
235
Juan Castillo671b8db2015-11-12 10:59:26 +0000236 # If there's BL32 companion for the chosen SPD, we expect that the SPD's
237 # Makefile would set NEED_BL32 to "yes". In this case, the build system
238 # supports two mutually exclusive options:
239 # * BL32 is built from source: then BL32_SOURCES must contain the list
240 # of source files to build BL32
241 # * BL32 is a prebuilt binary: then BL32 must point to the image file
242 # that will be included in the FIP
243 # If both BL32_SOURCES and BL32 are defined, the binary takes precedence
244 # over the sources.
Juan Castilloa3487d12015-08-18 14:23:04 +0100245endif
246
247
248################################################################################
249# Include the platform specific Makefile after the SPD Makefile (the platform
250# makefile may use all previous definitions in this file)
251################################################################################
Jeenu Viswambharane5c39fd2014-05-16 11:38:10 +0100252
Dan Handley81be1002015-03-27 17:44:35 +0000253include ${PLAT_MAKEFILE_FULL}
Jon Medhurst66573cb2014-02-13 15:19:28 +0000254
Soby Mathewa1941252016-05-05 14:33:33 +0100255# Platform compatibility is not supported in AArch32
256ifneq (${ARCH},aarch32)
Achin Gupta1bdde172015-11-07 16:19:23 +0000257# If the platform has not defined ENABLE_PLAT_COMPAT, then enable it by default
258ifndef ENABLE_PLAT_COMPAT
259ENABLE_PLAT_COMPAT := 1
260endif
261
262# Include the platform compatibility helpers for PSCI
263ifneq (${ENABLE_PLAT_COMPAT}, 0)
264include plat/compat/plat_compat.mk
265endif
Soby Mathewa1941252016-05-05 14:33:33 +0100266endif
Achin Gupta1bdde172015-11-07 16:19:23 +0000267
Sandrine Bailleuxd4817592016-01-13 14:57:38 +0000268# Include the CPU specific operations makefile, which provides default
269# values for all CPU errata workarounds and CPU specific optimisations.
270# This can be overridden by the platform.
Soby Mathew937488b2014-09-22 14:13:34 +0100271include lib/cpus/cpu-ops.mk
Soby Mathew802f8652014-08-14 16:19:29 +0100272
Juan Castilloa3487d12015-08-18 14:23:04 +0100273
274################################################################################
Antonio Nino Diazfaf573a2016-02-15 14:53:10 +0000275# Check incompatible options
276################################################################################
277
278ifdef EL3_PAYLOAD_BASE
Antonio Nino Diaz2b8277b2016-04-06 17:31:57 +0100279 ifdef PRELOADED_BL33_BASE
280 $(warning "PRELOADED_BL33_BASE and EL3_PAYLOAD_BASE are \
281 incompatible build options. EL3_PAYLOAD_BASE has priority.")
Antonio Nino Diazfaf573a2016-02-15 14:53:10 +0000282 endif
283endif
284
285ifeq (${NEED_BL33},yes)
286 ifdef EL3_PAYLOAD_BASE
287 $(warning "BL33 image is not needed when option \
288 BL33_PAYLOAD_BASE is used and won't be added to the FIP file.")
289 endif
Antonio Nino Diaz2b8277b2016-04-06 17:31:57 +0100290 ifdef PRELOADED_BL33_BASE
291 $(warning "BL33 image is not needed when option \
292 PRELOADED_BL33_BASE is used and won't be added to the FIP \
293 file.")
Antonio Nino Diazfaf573a2016-02-15 14:53:10 +0000294 endif
295endif
296
Yatharth Kocharf528faf2016-06-28 16:58:26 +0100297ifeq (${ARCH},aarch32)
Yatharth Kochar8c0177f2016-11-11 13:57:50 +0000298 # For AArch32, LOAD_IMAGE_V2 must be enabled.
Yatharth Kocharf528faf2016-06-28 16:58:26 +0100299 ifeq (${LOAD_IMAGE_V2}, 0)
300 $(error "For AArch32, LOAD_IMAGE_V2 must be enabled.")
301 endif
Yatharth Kochar8c0177f2016-11-11 13:57:50 +0000302 # TRUSTED_BOARD_BOOT is currently not supported for AArch32.
303 ifeq (${TRUSTED_BOARD_BOOT},1)
304 $(error "TRUSTED_BOARD_BOOT is currently not supported for AArch32")
305 endif
Yatharth Kocharf528faf2016-06-28 16:58:26 +0100306endif
307
308
Antonio Nino Diazfaf573a2016-02-15 14:53:10 +0000309################################################################################
Juan Castilloa3487d12015-08-18 14:23:04 +0100310# Process platform overrideable behaviour
311################################################################################
312
313# Check if -pedantic option should be used
314ifeq (${DISABLE_PEDANTIC},0)
Sandrine Bailleuxf5fdbcc2016-04-11 13:01:17 +0100315 TF_CFLAGS += -pedantic
Jon Medhurst66573cb2014-02-13 15:19:28 +0000316endif
317
Sandrine Bailleuxf4119ec2015-12-17 13:58:58 +0000318# Using the ARM Trusted Firmware BL2 implies that a BL33 image also needs to be
Juan Castilloa3487d12015-08-18 14:23:04 +0100319# supplied for the FIP and Certificate generation tools. This flag can be
320# overridden by the platform.
Jon Medhurst66573cb2014-02-13 15:19:28 +0000321ifdef BL2_SOURCES
Antonio Nino Diazfaf573a2016-02-15 14:53:10 +0000322 ifdef EL3_PAYLOAD_BASE
323 # If booting an EL3 payload there is no need for a BL33 image
324 # in the FIP file.
325 NEED_BL33 := no
326 else
Antonio Nino Diaz2b8277b2016-04-06 17:31:57 +0100327 ifdef PRELOADED_BL33_BASE
Antonio Nino Diazfaf573a2016-02-15 14:53:10 +0000328 # If booting a BL33 preloaded image there is no need of
329 # another one in the FIP file.
330 NEED_BL33 := no
331 else
332 NEED_BL33 ?= yes
333 endif
334 endif
Jon Medhurst66573cb2014-02-13 15:19:28 +0000335endif
Achin Gupta4f6ad662013-10-25 09:08:21 +0100336
Juan Castilloa3487d12015-08-18 14:23:04 +0100337# Process TBB related flags
338ifneq (${GENERATE_COT},0)
339 # Common cert_create options
340 ifneq (${CREATE_KEYS},0)
341 $(eval CRT_ARGS += -n)
Yatharth Kochard1a93432015-10-12 12:33:47 +0100342 $(eval FWU_CRT_ARGS += -n)
Juan Castilloa3487d12015-08-18 14:23:04 +0100343 ifneq (${SAVE_KEYS},0)
344 $(eval CRT_ARGS += -k)
Yatharth Kochard1a93432015-10-12 12:33:47 +0100345 $(eval FWU_CRT_ARGS += -k)
Juan Castilloa3487d12015-08-18 14:23:04 +0100346 endif
347 endif
348 # Include TBBR makefile (unless the platform indicates otherwise)
349 ifeq (${INCLUDE_TBBR_MK},1)
350 include make_helpers/tbbr/tbbr_tools.mk
351 endif
Ryan Harkin25cff832014-01-13 12:37:03 +0000352endif
Achin Gupta4f6ad662013-10-25 09:08:21 +0100353
Masahiro Yamada4d87eb42016-12-25 13:52:22 +0900354ifneq (${FIP_ALIGN},0)
355FIP_ARGS += --align ${FIP_ALIGN}
356endif
357
Juan Castilloa3487d12015-08-18 14:23:04 +0100358################################################################################
dp-arm4972ec52016-05-25 16:20:20 +0100359# Auxiliary tools (fiptool, cert_create, etc)
Juan Castilloa3487d12015-08-18 14:23:04 +0100360################################################################################
Achin Gupta375f5382014-02-18 18:12:48 +0000361
Juan Castilloa3487d12015-08-18 14:23:04 +0100362# Variables for use with Certificate Generation Tool
363CRTTOOLPATH ?= tools/cert_create
Evan Lloyd004c9a52015-12-03 11:35:40 +0000364CRTTOOL ?= ${CRTTOOLPATH}/cert_create${BIN_EXT}
Achin Gupta375f5382014-02-18 18:12:48 +0000365
Juan Castilloa3487d12015-08-18 14:23:04 +0100366# Variables for use with Firmware Image Package
dp-arm4972ec52016-05-25 16:20:20 +0100367FIPTOOLPATH ?= tools/fiptool
368FIPTOOL ?= ${FIPTOOLPATH}/fiptool${BIN_EXT}
James Morrisseyeaaeece2013-11-01 13:56:59 +0000369
Achin Gupta4f6ad662013-10-25 09:08:21 +0100370
Juan Castilloa3487d12015-08-18 14:23:04 +0100371################################################################################
372# Build options checks
373################################################################################
374
Juan Castilloa3487d12015-08-18 14:23:04 +0100375$(eval $(call assert_boolean,ASM_ASSERTION))
Sandrine Bailleuxb21b02f2015-10-30 15:05:17 +0000376$(eval $(call assert_boolean,COLD_BOOT_SINGLE_CPU))
Jeenu Viswambharan615ff392016-10-24 14:31:51 +0100377$(eval $(call assert_boolean,CREATE_KEYS))
378$(eval $(call assert_boolean,CTX_INCLUDE_AARCH32_REGS))
379$(eval $(call assert_boolean,CTX_INCLUDE_FPREGS))
380$(eval $(call assert_boolean,DEBUG))
381$(eval $(call assert_boolean,DISABLE_PEDANTIC))
Achin Gupta1bdde172015-11-07 16:19:23 +0000382$(eval $(call assert_boolean,ENABLE_PLAT_COMPAT))
Yatharth Kochar9518d022016-03-11 14:20:19 +0000383$(eval $(call assert_boolean,ENABLE_PMF))
Yatharth Kochar241ec6c2016-05-09 18:26:35 +0100384$(eval $(call assert_boolean,ENABLE_PSCI_STAT))
dp-arm3cac7862016-09-19 11:18:44 +0100385$(eval $(call assert_boolean,ENABLE_RUNTIME_INSTRUMENTATION))
Jeenu Viswambharan615ff392016-10-24 14:31:51 +0100386$(eval $(call assert_boolean,ERROR_DEPRECATED))
387$(eval $(call assert_boolean,GENERATE_COT))
Jeenu Viswambharana10d64e2017-01-04 13:51:42 +0000388$(eval $(call assert_boolean,HW_ASSISTED_COHERENCY))
Jeenu Viswambharan615ff392016-10-24 14:31:51 +0100389$(eval $(call assert_boolean,LOAD_IMAGE_V2))
390$(eval $(call assert_boolean,NS_TIMER_SWITCH))
391$(eval $(call assert_boolean,PL011_GENERIC_UART))
392$(eval $(call assert_boolean,PROGRAMMABLE_RESET_ADDRESS))
393$(eval $(call assert_boolean,PSCI_EXTENDED_STATE_ID))
394$(eval $(call assert_boolean,RESET_TO_BL31))
395$(eval $(call assert_boolean,SAVE_KEYS))
396$(eval $(call assert_boolean,SEPARATE_CODE_AND_RODATA))
397$(eval $(call assert_boolean,SPIN_ON_BL1_EXIT))
398$(eval $(call assert_boolean,TRUSTED_BOARD_BOOT))
399$(eval $(call assert_boolean,USE_COHERENT_MEM))
Dan Handley81be1002015-03-27 17:44:35 +0000400
Jeenu Viswambharanfca76802017-01-16 16:52:35 +0000401$(eval $(call assert_numeric,ARM_ARCH_MAJOR))
402$(eval $(call assert_numeric,ARM_ARCH_MINOR))
403
Juan Castilloa3487d12015-08-18 14:23:04 +0100404################################################################################
405# Add definitions to the cpp preprocessor based on the current build options.
406# This is done after including the platform specific makefile to allow the
407# platform to overwrite the default options
408################################################################################
Jeenu Viswambharand1b60152014-05-12 15:28:47 +0100409
Vikram Kanigiri40d468c2014-12-23 01:00:22 +0000410$(eval $(call add_define,ARM_CCI_PRODUCT_ID))
Jeenu Viswambharanfca76802017-01-16 16:52:35 +0000411$(eval $(call add_define,ARM_ARCH_MAJOR))
412$(eval $(call add_define,ARM_ARCH_MINOR))
Jeenu Viswambharan615ff392016-10-24 14:31:51 +0100413$(eval $(call add_define,ARM_GIC_ARCH))
Soby Mathew041f62a2014-07-14 16:58:03 +0100414$(eval $(call add_define,ASM_ASSERTION))
Sandrine Bailleuxb21b02f2015-10-30 15:05:17 +0000415$(eval $(call add_define,COLD_BOOT_SINGLE_CPU))
Jeenu Viswambharan615ff392016-10-24 14:31:51 +0100416$(eval $(call add_define,CTX_INCLUDE_AARCH32_REGS))
417$(eval $(call add_define,CTX_INCLUDE_FPREGS))
Achin Gupta1bdde172015-11-07 16:19:23 +0000418$(eval $(call add_define,ENABLE_PLAT_COMPAT))
Yatharth Kochar9518d022016-03-11 14:20:19 +0000419$(eval $(call add_define,ENABLE_PMF))
Yatharth Kochar241ec6c2016-05-09 18:26:35 +0100420$(eval $(call add_define,ENABLE_PSCI_STAT))
dp-arm3cac7862016-09-19 11:18:44 +0100421$(eval $(call add_define,ENABLE_RUNTIME_INSTRUMENTATION))
Jeenu Viswambharan615ff392016-10-24 14:31:51 +0100422$(eval $(call add_define,ERROR_DEPRECATED))
Jeenu Viswambharana10d64e2017-01-04 13:51:42 +0000423$(eval $(call add_define,HW_ASSISTED_COHERENCY))
Jeenu Viswambharan615ff392016-10-24 14:31:51 +0100424$(eval $(call add_define,LOAD_IMAGE_V2))
425$(eval $(call add_define,LOG_LEVEL))
426$(eval $(call add_define,NS_TIMER_SWITCH))
427$(eval $(call add_define,PL011_GENERIC_UART))
428$(eval $(call add_define,PLAT_${PLAT}))
429$(eval $(call add_define,PROGRAMMABLE_RESET_ADDRESS))
430$(eval $(call add_define,PSCI_EXTENDED_STATE_ID))
431$(eval $(call add_define,RESET_TO_BL31))
432$(eval $(call add_define,SEPARATE_CODE_AND_RODATA))
433$(eval $(call add_define,SPD_${SPD}))
434$(eval $(call add_define,SPIN_ON_BL1_EXIT))
435$(eval $(call add_define,TRUSTED_BOARD_BOOT))
436$(eval $(call add_define,USE_COHERENT_MEM))
437
Sandrine Bailleux03897bb2015-11-26 16:31:34 +0000438# Define the EL3_PAYLOAD_BASE flag only if it is provided.
439ifdef EL3_PAYLOAD_BASE
Antonio Nino Diazfaf573a2016-02-15 14:53:10 +0000440 $(eval $(call add_define,EL3_PAYLOAD_BASE))
441else
Antonio Nino Diaz2b8277b2016-04-06 17:31:57 +0100442 # Define the PRELOADED_BL33_BASE flag only if it is provided and
443 # EL3_PAYLOAD_BASE is not defined, as it has priority.
444 ifdef PRELOADED_BL33_BASE
445 $(eval $(call add_define,PRELOADED_BL33_BASE))
Antonio Nino Diazfaf573a2016-02-15 14:53:10 +0000446 endif
Sandrine Bailleux03897bb2015-11-26 16:31:34 +0000447endif
Soby Mathewc6820d12016-05-09 17:49:55 +0100448# Define the AARCH32/AARCH64 flag based on the ARCH flag
449ifeq (${ARCH},aarch32)
450 $(eval $(call add_define,AARCH32))
451else
452 $(eval $(call add_define,AARCH64))
453endif
Soby Mathew85dbf5a2015-04-07 12:16:56 +0100454
Juan Castilloa3487d12015-08-18 14:23:04 +0100455################################################################################
456# Include BL specific makefiles
457################################################################################
Juan Castilloa3487d12015-08-18 14:23:04 +0100458ifdef BL1_SOURCES
459NEED_BL1 := yes
460include bl1/bl1.mk
461endif
Sandrine Bailleux449dbd52015-06-02 17:19:43 +0100462
Juan Castilloa3487d12015-08-18 14:23:04 +0100463ifdef BL2_SOURCES
464NEED_BL2 := yes
465include bl2/bl2.mk
466endif
Soby Mathew49473e42015-06-10 13:49:59 +0100467
Yatharth Kochara5f77d32016-07-04 11:26:14 +0100468# For AArch32, BL31 is not applicable, and BL2U is not supported at present.
469ifneq (${ARCH},aarch32)
Yatharth Kocharb1c2fe02015-10-14 15:27:24 +0100470ifdef BL2U_SOURCES
471NEED_BL2U := yes
472include bl2u/bl2u.mk
473endif
474
Juan Castilloa3487d12015-08-18 14:23:04 +0100475ifdef BL31_SOURCES
Sandrine Bailleux03897bb2015-11-26 16:31:34 +0000476# When booting an EL3 payload, there is no need to compile the BL31 image nor
477# put it in the FIP.
478ifndef EL3_PAYLOAD_BASE
Juan Castilloa3487d12015-08-18 14:23:04 +0100479NEED_BL31 := yes
480include bl31/bl31.mk
481endif
Sandrine Bailleux03897bb2015-11-26 16:31:34 +0000482endif
Soby Mathewa1941252016-05-05 14:33:33 +0100483endif
Soby Mathew70716d62015-07-13 16:26:11 +0100484
Soby Mathewa1941252016-05-05 14:33:33 +0100485ifeq (${ARCH},aarch32)
486NEED_BL32 := yes
487
488################################################################################
489# Build `AARCH32_SP` as BL32 image for AArch32
490################################################################################
491ifneq (${AARCH32_SP},none)
492# We expect to locate an sp.mk under the specified AARCH32_SP directory
493AARCH32_SP_MAKE := $(wildcard bl32/${AARCH32_SP}/${AARCH32_SP}.mk)
494
495ifeq (${AARCH32_SP_MAKE},)
496 $(error Error: No bl32/${AARCH32_SP}/${AARCH32_SP}.mk located)
497endif
498
499$(info Including ${AARCH32_SP_MAKE})
500include ${AARCH32_SP_MAKE}
501endif
502
503endif
Achin Gupta4f6ad662013-10-25 09:08:21 +0100504
Juan Castilloa3487d12015-08-18 14:23:04 +0100505################################################################################
506# Build targets
507################################################################################
Achin Gupta4f6ad662013-10-25 09:08:21 +0100508
Yatharth Kochard1a93432015-10-12 12:33:47 +0100509.PHONY: all msg_start clean realclean distclean cscope locate-checkpatch checkcodebase checkpatch fiptool fip fwu_fip certtool
Juan Castilloa3487d12015-08-18 14:23:04 +0100510.SUFFIXES:
Achin Gupta4f6ad662013-10-25 09:08:21 +0100511
Juan Castilloa3487d12015-08-18 14:23:04 +0100512all: msg_start
Harry Liebelf58ad362014-01-10 18:00:33 +0000513
Juan Castilloa3487d12015-08-18 14:23:04 +0100514msg_start:
515 @echo "Building ${PLAT}"
Juan Castillo11abdcd2014-10-21 11:30:42 +0100516
Soby Mathew18a62042015-10-26 14:29:21 +0000517# Check if deprecated declarations should be treated as error or not.
518ifeq (${ERROR_DEPRECATED},0)
Sandrine Bailleuxf5fdbcc2016-04-11 13:01:17 +0100519 TF_CFLAGS += -Wno-error=deprecated-declarations
Soby Mathew18a62042015-10-26 14:29:21 +0000520endif
521
Juan Castilloa3487d12015-08-18 14:23:04 +0100522# Expand build macros for the different images
523ifeq (${NEED_BL1},yes)
524$(eval $(call MAKE_BL,1))
525endif
Juan Castillo11abdcd2014-10-21 11:30:42 +0100526
Juan Castilloa3487d12015-08-18 14:23:04 +0100527ifeq (${NEED_BL2},yes)
Juan Castillo8e04dec2016-01-05 11:55:36 +0000528$(if ${BL2}, $(eval $(call MAKE_TOOL_ARGS,2,${BL2},tb-fw)),\
529 $(eval $(call MAKE_BL,2,tb-fw)))
Juan Castilloa3487d12015-08-18 14:23:04 +0100530endif
Juan Castillo11abdcd2014-10-21 11:30:42 +0100531
Juan Castilloa3487d12015-08-18 14:23:04 +0100532ifeq (${NEED_BL31},yes)
533BL31_SOURCES += ${SPD_SOURCES}
Juan Castillo8e04dec2016-01-05 11:55:36 +0000534$(if ${BL31}, $(eval $(call MAKE_TOOL_ARGS,31,${BL31},soc-fw)),\
535 $(eval $(call MAKE_BL,31,soc-fw)))
Juan Castilloa3487d12015-08-18 14:23:04 +0100536endif
Juan Castillo379954c2014-11-04 17:36:40 +0000537
Juan Castillo671b8db2015-11-12 10:59:26 +0000538# If a BL32 image is needed but neither BL32 nor BL32_SOURCES is defined, the
539# build system will call FIP_ADD_IMG to print a warning message and abort the
540# process. Note that the dependency on BL32 applies to the FIP only.
Juan Castilloa3487d12015-08-18 14:23:04 +0100541ifeq (${NEED_BL32},yes)
Juan Castillo8e04dec2016-01-05 11:55:36 +0000542$(if ${BL32}, $(eval $(call MAKE_TOOL_ARGS,32,${BL32},tos-fw)),\
543 $(if ${BL32_SOURCES}, $(eval $(call MAKE_BL,32,tos-fw)),\
544 $(eval $(call FIP_ADD_IMG,BL32,--tos-fw))))
Juan Castillo11abdcd2014-10-21 11:30:42 +0100545endif
546
Juan Castilloa3487d12015-08-18 14:23:04 +0100547# Add the BL33 image if required by the platform
548ifeq (${NEED_BL33},yes)
Juan Castillo8e04dec2016-01-05 11:55:36 +0000549$(eval $(call FIP_ADD_IMG,BL33,--nt-fw))
Juan Castillo9c25a402015-01-13 12:21:04 +0000550endif
551
Yatharth Kocharb1c2fe02015-10-14 15:27:24 +0100552ifeq (${NEED_BL2U},yes)
553BL2U_PATH := $(if ${BL2U},${BL2U},$(call IMG_BIN,2u))
554$(if ${BL2U}, ,$(eval $(call MAKE_BL,2u)))
Juan Castillo8e04dec2016-01-05 11:55:36 +0000555$(eval $(call FWU_FIP_ADD_PAYLOAD,${BL2U_PATH},--ap-fwu-cfg))
Yatharth Kocharb1c2fe02015-10-14 15:27:24 +0100556endif
557
Ian Spray36eaaf32014-01-30 17:25:28 +0000558locate-checkpatch:
559ifndef CHECKPATCH
560 $(error "Please set CHECKPATCH to point to the Linux checkpatch.pl file, eg: CHECKPATCH=../linux/script/checkpatch.pl")
561else
562ifeq (,$(wildcard ${CHECKPATCH}))
563 $(error "The file CHECKPATCH points to cannot be found, use eg: CHECKPATCH=../linux/script/checkpatch.pl")
564endif
565endif
566
Achin Gupta4f6ad662013-10-25 09:08:21 +0100567clean:
Juan Castilloa3487d12015-08-18 14:23:04 +0100568 @echo " CLEAN"
Evan Lloyd26c6cb42015-12-02 18:33:55 +0000569 $(call SHELL_REMOVE_DIR,${BUILD_PLAT})
Juan Castilloa3487d12015-08-18 14:23:04 +0100570 ${Q}${MAKE} --no-print-directory -C ${FIPTOOLPATH} clean
571 ${Q}${MAKE} PLAT=${PLAT} --no-print-directory -C ${CRTTOOLPATH} clean
Achin Gupta4f6ad662013-10-25 09:08:21 +0100572
James Morrisseyeaaeece2013-11-01 13:56:59 +0000573realclean distclean:
Juan Castilloa3487d12015-08-18 14:23:04 +0100574 @echo " REALCLEAN"
Evan Lloyd26c6cb42015-12-02 18:33:55 +0000575 $(call SHELL_REMOVE_DIR,${BUILD_BASE})
576 $(call SHELL_DELETE_ALL, ${CURDIR}/cscope.*)
Juan Castilloa3487d12015-08-18 14:23:04 +0100577 ${Q}${MAKE} --no-print-directory -C ${FIPTOOLPATH} clean
578 ${Q}${MAKE} PLAT=${PLAT} --no-print-directory -C ${CRTTOOLPATH} clean
Achin Gupta4f6ad662013-10-25 09:08:21 +0100579
Ian Spray36eaaf32014-01-30 17:25:28 +0000580checkcodebase: locate-checkpatch
Juan Castilloa3487d12015-08-18 14:23:04 +0100581 @echo " CHECKING STYLE"
Dan Handley3a355712016-06-02 18:21:02 +0100582 @if test -d .git ; then \
Antonio Nino Diazd84f88e2017-01-16 17:20:45 +0000583 git ls-files | grep -E -v 'libfdt|stdlib|docs|\.md' | \
Dan Handley3a355712016-06-02 18:21:02 +0100584 while read GIT_FILE ; \
585 do ${CHECKPATCH} ${CHECKCODE_ARGS} -f $$GIT_FILE ; \
586 done ; \
587 else \
588 find . -type f -not -iwholename "*.git*" \
589 -not -iwholename "*build*" \
590 -not -iwholename "*libfdt*" \
591 -not -iwholename "*stdlib*" \
592 -not -iwholename "*docs*" \
593 -not -iwholename "*.md" \
594 -exec ${CHECKPATCH} ${CHECKCODE_ARGS} -f {} \; ; \
595 fi
Ian Spray36eaaf32014-01-30 17:25:28 +0000596
597checkpatch: locate-checkpatch
Juan Castilloa3487d12015-08-18 14:23:04 +0100598 @echo " CHECKING STYLE"
Antonio Nino Diaz9c914472016-10-27 09:36:09 +0100599 ${Q}git format-patch --stdout ${BASE_COMMIT}..HEAD -- ${CHECK_PATHS} | ${CHECKPATCH} - || true
Juan Castilloa3487d12015-08-18 14:23:04 +0100600
601certtool: ${CRTTOOL}
Ian Spray36eaaf32014-01-30 17:25:28 +0000602
Juan Castillo11abdcd2014-10-21 11:30:42 +0100603.PHONY: ${CRTTOOL}
604${CRTTOOL}:
Juan Castilloa3487d12015-08-18 14:23:04 +0100605 ${Q}${MAKE} PLAT=${PLAT} --no-print-directory -C ${CRTTOOLPATH}
Evan Lloyd26c6cb42015-12-02 18:33:55 +0000606 @${ECHO_BLANK_LINE}
Juan Castilloa3487d12015-08-18 14:23:04 +0100607 @echo "Built $@ successfully"
Evan Lloyd26c6cb42015-12-02 18:33:55 +0000608 @${ECHO_BLANK_LINE}
Jon Medhurst407a95c2014-02-12 15:54:48 +0000609
Juan Castillo11abdcd2014-10-21 11:30:42 +0100610ifneq (${GENERATE_COT},0)
Juan Castilloa3487d12015-08-18 14:23:04 +0100611certificates: ${CRT_DEPS} ${CRTTOOL}
612 ${Q}${CRTTOOL} ${CRT_ARGS}
Evan Lloyd26c6cb42015-12-02 18:33:55 +0000613 @${ECHO_BLANK_LINE}
Juan Castilloa3487d12015-08-18 14:23:04 +0100614 @echo "Built $@ successfully"
615 @echo "Certificates can be found in ${BUILD_PLAT}"
Evan Lloyd26c6cb42015-12-02 18:33:55 +0000616 @${ECHO_BLANK_LINE}
Juan Castillo11abdcd2014-10-21 11:30:42 +0100617endif
618
Juan Castilloa3487d12015-08-18 14:23:04 +0100619${BUILD_PLAT}/${FIP_NAME}: ${FIP_DEPS} ${FIPTOOL}
dp-arm4972ec52016-05-25 16:20:20 +0100620 ${Q}${FIPTOOL} create ${FIP_ARGS} $@
621 ${Q}${FIPTOOL} info $@
Evan Lloyd26c6cb42015-12-02 18:33:55 +0000622 @${ECHO_BLANK_LINE}
Juan Castilloa3487d12015-08-18 14:23:04 +0100623 @echo "Built $@ successfully"
Evan Lloyd26c6cb42015-12-02 18:33:55 +0000624 @${ECHO_BLANK_LINE}
Soby Mathewdbee7fc2014-09-08 17:51:01 +0100625
Yatharth Kochard1a93432015-10-12 12:33:47 +0100626ifneq (${GENERATE_COT},0)
627fwu_certificates: ${FWU_CRT_DEPS} ${CRTTOOL}
628 ${Q}${CRTTOOL} ${FWU_CRT_ARGS}
629 @echo
630 @echo "Built $@ successfully"
631 @echo "FWU certificates can be found in ${BUILD_PLAT}"
632 @echo
633endif
634
635${BUILD_PLAT}/${FWU_FIP_NAME}: ${FWU_FIP_DEPS} ${FIPTOOL}
dp-arm4972ec52016-05-25 16:20:20 +0100636 ${Q}${FIPTOOL} create ${FWU_FIP_ARGS} $@
637 ${Q}${FIPTOOL} info $@
Yatharth Kochard1a93432015-10-12 12:33:47 +0100638 @echo
639 @echo "Built $@ successfully"
640 @echo
641
Juan Castilloa3487d12015-08-18 14:23:04 +0100642fiptool: ${FIPTOOL}
643fip: ${BUILD_PLAT}/${FIP_NAME}
Yatharth Kochard1a93432015-10-12 12:33:47 +0100644fwu_fip: ${BUILD_PLAT}/${FWU_FIP_NAME}
Harry Liebelf58ad362014-01-10 18:00:33 +0000645
Juan Castilloa3487d12015-08-18 14:23:04 +0100646.PHONY: ${FIPTOOL}
647${FIPTOOL}:
dp-arm4972ec52016-05-25 16:20:20 +0100648 ${Q}${MAKE} CPPFLAGS="-DVERSION='\"${VERSION_STRING}\"'" --no-print-directory -C ${FIPTOOLPATH}
Harry Liebelf58ad362014-01-10 18:00:33 +0000649
Joakim Bech35fab8c2014-01-23 14:51:49 +0100650cscope:
651 @echo " CSCOPE"
652 ${Q}find ${CURDIR} -name "*.[chsS]" > cscope.files
653 ${Q}cscope -b -q -k
654
Ryan Harkin72ee3312014-01-15 16:55:07 +0000655help:
Evan Lloydf2697142015-12-02 18:17:37 +0000656 @echo "usage: ${MAKE} PLAT=<${PLATFORM_LIST}> [OPTIONS] [TARGET]"
Ryan Harkin72ee3312014-01-15 16:55:07 +0000657 @echo ""
658 @echo "PLAT is used to specify which platform you wish to build."
Sandrine Bailleuxa08588a2014-03-21 13:16:35 +0000659 @echo "If no platform is specified, PLAT defaults to: ${DEFAULT_PLAT}"
Ryan Harkin72ee3312014-01-15 16:55:07 +0000660 @echo ""
Sandrine Bailleuxcf8afbd2015-02-18 16:18:00 +0000661 @echo "Please refer to the User Guide for a list of all supported options."
662 @echo "Note that the build system doesn't track dependencies for build "
663 @echo "options. Therefore, if any of the build options are changed "
664 @echo "from a previous build, a clean build must be performed."
665 @echo ""
Ryan Harkin72ee3312014-01-15 16:55:07 +0000666 @echo "Supported Targets:"
Sandrine Bailleuxcf8afbd2015-02-18 16:18:00 +0000667 @echo " all Build all individual bootloader binaries"
Ian Spray36eaaf32014-01-30 17:25:28 +0000668 @echo " bl1 Build the BL1 binary"
Jeenu Viswambharan8aa559c2014-02-21 11:42:08 +0000669 @echo " bl2 Build the BL2 binary"
Yatharth Kocharb1c2fe02015-10-14 15:27:24 +0100670 @echo " bl2u Build the BL2U binary"
Juan Castillo7d199412015-12-14 09:35:25 +0000671 @echo " bl31 Build the BL31 binary"
Soby Mathewa1941252016-05-05 14:33:33 +0100672 @echo " bl32 Build the BL32 binary. If ARCH=aarch32, then "
673 @echo " this builds secure payload specified by AARCH32_SP"
Juan Castilloa3487d12015-08-18 14:23:04 +0100674 @echo " certificates Build the certificates (requires 'GENERATE_COT=1')"
Sandrine Bailleuxcf8afbd2015-02-18 16:18:00 +0000675 @echo " fip Build the Firmware Image Package (FIP)"
Yatharth Kochard1a93432015-10-12 12:33:47 +0100676 @echo " fwu_fip Build the FWU Firmware Image Package (FIP)"
Ian Spray36eaaf32014-01-30 17:25:28 +0000677 @echo " checkcodebase Check the coding style of the entire source tree"
678 @echo " checkpatch Check the coding style on changes in the current"
679 @echo " branch against BASE_COMMIT (default origin/master)"
680 @echo " clean Clean the build for the selected platform"
Harry Liebelf58ad362014-01-10 18:00:33 +0000681 @echo " cscope Generate cscope index"
Ian Spray36eaaf32014-01-30 17:25:28 +0000682 @echo " distclean Remove all build artifacts for all platforms"
Juan Castillo11abdcd2014-10-21 11:30:42 +0100683 @echo " certtool Build the Certificate generation tool"
Andreas Färberec82cfb2016-10-10 05:18:49 +0200684 @echo " fiptool Build the Firmware Image Package (FIP) creation tool"
Ryan Harkin72ee3312014-01-15 16:55:07 +0000685 @echo ""
Sandrine Bailleuxcf8afbd2015-02-18 16:18:00 +0000686 @echo "Note: most build targets require PLAT to be set to a specific platform."
Ryan Harkin72ee3312014-01-15 16:55:07 +0000687 @echo ""
688 @echo "example: build all targets for the FVP platform:"
689 @echo " CROSS_COMPILE=aarch64-none-elf- make PLAT=fvp all"