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Achin Gupta4f6ad662013-10-25 09:08:21 +01001#
Dan Handley81be1002015-03-27 17:44:35 +00002# Copyright (c) 2013-2015, 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#
Dan Handley98b6b5d2014-08-26 19:18:55 +010034VERSION_MAJOR := 1
Achin Guptae357a9e2015-02-02 17:31:42 +000035VERSION_MINOR := 1
Juan Castillo04be3a52014-06-30 11:41:46 +010036
37#
Jeenu Viswambharan19a0ace2014-05-15 14:40:58 +010038# Default values for build configurations
39#
40
41# Build verbosity
42V := 0
43# Debug build
44DEBUG := 0
Jeenu Viswambharan19a0ace2014-05-15 14:40:58 +010045# Build platform
46DEFAULT_PLAT := fvp
47PLAT := ${DEFAULT_PLAT}
48# SPD choice
49SPD := none
50# Base commit to perform code check on
51BASE_COMMIT := origin/master
Jeenu Viswambharand1b60152014-05-12 15:28:47 +010052# NS timer register save and restore
53NS_TIMER_SWITCH := 0
Vikram Kanigiri96377452014-04-24 11:02:16 +010054# By default, Bl1 acts as the reset handler, not BL31
55RESET_TO_BL31 := 0
Juan Castillo258e94f2014-06-25 17:26:36 +010056# Include FP registers in cpu context
57CTX_INCLUDE_FPREGS := 0
Sandrine Bailleux5fe57c12014-07-17 17:23:14 +010058# Determine the version of ARM GIC architecture to use for interrupt management
59# in EL3. The platform port can change this value if needed.
60ARM_GIC_ARCH := 2
Vikram Kanigiri40d468c2014-12-23 01:00:22 +000061# Determine the version of ARM CCI product used in the platform. The platform
62# port can change this value if needed.
63ARM_CCI_PRODUCT_ID := 400
Soby Mathew041f62a2014-07-14 16:58:03 +010064# Flag used to indicate if ASM_ASSERTION should be enabled for the build.
65# This defaults to being present in DEBUG builds only.
66ASM_ASSERTION := ${DEBUG}
Soby Mathew523d6332015-01-08 18:02:19 +000067# Build option to choose whether Trusted firmware uses Coherent memory or not.
68USE_COHERENT_MEM := 1
Juan Castillo860cc3b2014-11-24 11:45:12 +000069# Default FIP file name
70FIP_NAME := fip.bin
Juan Castillo9c25a402015-01-13 12:21:04 +000071# By default, use the -pedantic option in the gcc command line
72DISABLE_PEDANTIC := 0
Juan Castillo11abdcd2014-10-21 11:30:42 +010073# Flags to generate the Chain of Trust
74GENERATE_COT := 0
75CREATE_KEYS := 1
Juan Castillo72fe3472015-02-25 12:43:12 +000076SAVE_KEYS := 0
Juan Castillo5e29c752015-01-07 10:39:25 +000077# Flags to build TF with Trusted Boot support
78TRUSTED_BOARD_BOOT := 0
Juan Castillo13f6a932015-01-13 10:37:27 +000079AUTH_MOD := none
Sandrine Bailleux449dbd52015-06-02 17:19:43 +010080# By default, consider that the platform's reset address is not programmable.
81# The platform Makefile is free to override this value.
82PROGRAMMABLE_RESET_ADDRESS := 0
Achin Gupta4f6ad662013-10-25 09:08:21 +010083
Achin Gupta7421b462014-02-01 18:53:26 +000084# Checkpatch ignores
Juan Castillo749e0792015-03-11 14:21:53 +000085CHECK_IGNORE = --ignore COMPLEX_MACRO \
86 --ignore GERRIT_CHANGE_ID \
87 --ignore GIT_COMMIT_ID
Achin Gupta7421b462014-02-01 18:53:26 +000088
89CHECKPATCH_ARGS = --no-tree --no-signoff ${CHECK_IGNORE}
90CHECKCODE_ARGS = --no-patch --no-tree --no-signoff ${CHECK_IGNORE}
Sandrine Bailleux33fbb972015-02-26 11:22:40 +000091# Do not check the coding style on C library files
Sandrine Bailleuxe3dee952015-03-26 15:07:47 +000092CHECK_PATHS = $(shell ls -I include -I lib) \
93 $(addprefix include/,$(shell ls -I stdlib include)) \
94 $(addprefix lib/,$(shell ls -I stdlib lib))
Ian Spray36eaaf32014-01-30 17:25:28 +000095
Jeenu Viswambharan19a0ace2014-05-15 14:40:58 +010096ifeq (${V},0)
Achin Gupta4f6ad662013-10-25 09:08:21 +010097 Q=@
Ian Spray36eaaf32014-01-30 17:25:28 +000098 CHECKCODE_ARGS += --no-summary --terse
Achin Gupta4f6ad662013-10-25 09:08:21 +010099else
100 Q=
101endif
Jeenu Viswambharan2f2cef42014-02-19 09:38:18 +0000102export Q
103
James Morrisseyeaaeece2013-11-01 13:56:59 +0000104ifneq (${DEBUG}, 0)
105 BUILD_TYPE := debug
Dan Handleycba2c502014-08-08 14:36:42 +0100106 # Use LOG_LEVEL_INFO by default for debug builds
107 LOG_LEVEL := 40
James Morrisseyeaaeece2013-11-01 13:56:59 +0000108else
109 BUILD_TYPE := release
Dan Handleycba2c502014-08-08 14:36:42 +0100110 # Use LOG_LEVEL_NOTICE by default for release builds
111 LOG_LEVEL := 20
James Morrisseyeaaeece2013-11-01 13:56:59 +0000112endif
113
Juan Castillo04be3a52014-06-30 11:41:46 +0100114# Default build string (git branch and commit)
115ifeq (${BUILD_STRING},)
116 BUILD_STRING := $(shell git log -n 1 --pretty=format:"%h")
117endif
118
119VERSION_STRING := v${VERSION_MAJOR}.${VERSION_MINOR}(${BUILD_TYPE}):${BUILD_STRING}
120
Dan Handley176e7b42014-04-15 18:20:09 +0100121BL_COMMON_SOURCES := common/bl_common.c \
Soby Mathewafe7e2f2014-06-12 17:23:58 +0100122 common/tf_printf.c \
Soby Mathewc1adbbc2014-06-25 10:07:40 +0100123 common/aarch64/debug.S \
Dan Handley176e7b42014-04-15 18:20:09 +0100124 lib/aarch64/cache_helpers.S \
125 lib/aarch64/misc_helpers.S \
Dan Handley176e7b42014-04-15 18:20:09 +0100126 lib/aarch64/xlat_helpers.c \
127 lib/stdlib/std.c \
Dan Handley176e7b42014-04-15 18:20:09 +0100128 plat/common/aarch64/platform_helpers.S
Ryan Harkind7a6b0f2014-01-13 14:40:13 +0000129
Ryan Harkin25cff832014-01-13 12:37:03 +0000130BUILD_BASE := ./build
131BUILD_PLAT := ${BUILD_BASE}/${PLAT}/${BUILD_TYPE}
Achin Gupta4f6ad662013-10-25 09:08:21 +0100132
Dan Handley81be1002015-03-27 17:44:35 +0000133PLAT_MAKEFILE := platform.mk
134# Generate the platforms list by recursively searching for all directories
135# under /plat containing a PLAT_MAKEFILE. Append each platform with a `|`
136# char and strip out the final '|'.
137PLATFORMS := $(shell find plat/ -name '${PLAT_MAKEFILE}' -print0 | \
138 sed -r 's%[^\x00]*\/([^/]*)\/${PLAT_MAKEFILE}\x00%\1|%g' | \
139 sed -r 's/\|$$//')
Achin Gupta375f5382014-02-18 18:12:48 +0000140SPDS := $(shell ls -I none services/spd)
Ryan Harkin72ee3312014-01-15 16:55:07 +0000141
Jeenu Viswambharane5c39fd2014-05-16 11:38:10 +0100142# Convenience function for adding build definitions
143# $(eval $(call add_define,FOO)) will have:
144# -DFOO if $(FOO) is empty; -DFOO=$(FOO) otherwise
145define add_define
146DEFINES += -D$(1)$(if $(value $(1)),=$(value $(1)),)
147endef
148
149# Convenience function for verifying option has a boolean value
150# $(eval $(call assert_boolean,FOO)) will assert FOO is 0 or 1
151define assert_boolean
152$(and $(patsubst 0,,$(value $(1))),$(patsubst 1,,$(value $(1))),$(error $(1) must be boolean))
153endef
154
Ryan Harkin25cff832014-01-13 12:37:03 +0000155ifeq (${PLAT},)
Dan Handley81be1002015-03-27 17:44:35 +0000156 $(error "Error: Unknown platform. Please use PLAT=<platform name> to specify the platform")
Ryan Harkin25cff832014-01-13 12:37:03 +0000157endif
Dan Handley81be1002015-03-27 17:44:35 +0000158PLAT_MAKEFILE_FULL := $(shell find plat/ -wholename '*/${PLAT}/${PLAT_MAKEFILE}')
159ifeq ($(PLAT_MAKEFILE_FULL),)
Ryan Harkin25cff832014-01-13 12:37:03 +0000160 $(error "Error: Invalid platform. The following platforms are available: ${PLATFORMS}")
161endif
162
Jon Medhurst66573cb2014-02-13 15:19:28 +0000163all: msg_start
Achin Gupta4f6ad662013-10-25 09:08:21 +0100164
Ryan Harkin25cff832014-01-13 12:37:03 +0000165msg_start:
166 @echo "Building ${PLAT}"
Achin Gupta4f6ad662013-10-25 09:08:21 +0100167
Dan Handley81be1002015-03-27 17:44:35 +0000168include ${PLAT_MAKEFILE_FULL}
Jon Medhurst66573cb2014-02-13 15:19:28 +0000169
Soby Mathew937488b2014-09-22 14:13:34 +0100170# Include the CPU specific operations makefile. By default all CPU errata
171# workarounds and CPU specifc optimisations are disabled. This can be
Soby Mathew802f8652014-08-14 16:19:29 +0100172# overridden by the platform.
Soby Mathew937488b2014-09-22 14:13:34 +0100173include lib/cpus/cpu-ops.mk
Soby Mathew802f8652014-08-14 16:19:29 +0100174
Jon Medhurst66573cb2014-02-13 15:19:28 +0000175ifdef BL1_SOURCES
176NEED_BL1 := yes
177include bl1/bl1.mk
178endif
179
180ifdef BL2_SOURCES
181NEED_BL2 := yes
182include bl2/bl2.mk
Soby Mathewdbee7fc2014-09-08 17:51:01 +0100183# Using the ARM Trusted Firmware BL2 implies that a BL3-3 image also need to be supplied for the FIP.
184# This flag can be overridden by the platform.
185NEED_BL33 ?= yes
Jon Medhurst66573cb2014-02-13 15:19:28 +0000186endif
Achin Gupta4f6ad662013-10-25 09:08:21 +0100187
Jon Medhurst66573cb2014-02-13 15:19:28 +0000188ifdef BL31_SOURCES
189NEED_BL31 := yes
190include bl31/bl31.mk
Ryan Harkin25cff832014-01-13 12:37:03 +0000191endif
Achin Gupta4f6ad662013-10-25 09:08:21 +0100192
Achin Gupta375f5382014-02-18 18:12:48 +0000193# Include SPD Makefile if one has been specified
194ifneq (${SPD},none)
195 # We expect to locate an spd.mk under the specified SPD directory
196 SPD_MAKE := $(shell m="services/spd/${SPD}/${SPD}.mk"; [ -f "$$m" ] && echo "$$m")
197
198 ifeq (${SPD_MAKE},)
199 $(error Error: No services/spd/${SPD}/${SPD}.mk located)
200 endif
201 $(info Including ${SPD_MAKE})
202 include ${SPD_MAKE}
203
Soby Mathewdbee7fc2014-09-08 17:51:01 +0100204 # If there's BL3-2 companion for the chosen SPD, and the SPD wants to build the
205 # BL3-2 from source, we expect that the SPD's Makefile would set NEED_BL32
206 # variable to "yes". In case the BL3-2 is a binary which needs to be included in
207 # fip, then the NEED_BL32 needs to be set and BL3-2 would need to point to the bin.
Achin Gupta375f5382014-02-18 18:12:48 +0000208endif
209
Juan Castillo11abdcd2014-10-21 11:30:42 +0100210.PHONY: all msg_start clean realclean distclean cscope locate-checkpatch checkcodebase checkpatch fiptool fip certtool
James Morrisseyeaaeece2013-11-01 13:56:59 +0000211.SUFFIXES:
212
Sandrine Bailleux47e74a82014-06-23 13:37:53 +0100213INCLUDES += -Iinclude/bl31 \
Dan Handleya70615f2014-04-09 12:48:25 +0100214 -Iinclude/bl31/services \
Dan Handleya70615f2014-04-09 12:48:25 +0100215 -Iinclude/common \
216 -Iinclude/drivers \
217 -Iinclude/drivers/arm \
Dan Handley7b83c442014-08-12 14:20:28 +0100218 -Iinclude/drivers/io \
Varun Wadekareeeced52015-05-19 16:44:17 +0530219 -Iinclude/drivers/ti/uart \
Dan Handleya70615f2014-04-09 12:48:25 +0100220 -Iinclude/lib \
221 -Iinclude/lib/aarch64 \
Soby Mathew8e2f2872014-08-14 12:49:05 +0100222 -Iinclude/lib/cpus/aarch64 \
Dan Handleyed6ff952014-05-14 17:44:19 +0100223 -Iinclude/plat/common \
Ryan Harkind7a6b0f2014-01-13 14:40:13 +0000224 -Iinclude/stdlib \
225 -Iinclude/stdlib/sys \
Achin Gupta375f5382014-02-18 18:12:48 +0000226 ${PLAT_INCLUDES} \
227 ${SPD_INCLUDES}
Achin Gupta4f6ad662013-10-25 09:08:21 +0100228
Jeenu Viswambharan19a0ace2014-05-15 14:40:58 +0100229# Process DEBUG flag
230$(eval $(call assert_boolean,DEBUG))
231$(eval $(call add_define,DEBUG))
232ifeq (${DEBUG},0)
233 $(eval $(call add_define,NDEBUG))
234else
235CFLAGS += -g
236ASFLAGS += -g -Wa,--gdwarf-2
237endif
238
Dan Handley81be1002015-03-27 17:44:35 +0000239# Process PLAT flag
240$(eval $(call add_define,PLAT_${PLAT}))
241
Jeenu Viswambharand1b60152014-05-12 15:28:47 +0100242# Process NS_TIMER_SWITCH flag
243$(eval $(call assert_boolean,NS_TIMER_SWITCH))
244$(eval $(call add_define,NS_TIMER_SWITCH))
245
Vikram Kanigiri96377452014-04-24 11:02:16 +0100246# Process RESET_TO_BL31 flag
247$(eval $(call assert_boolean,RESET_TO_BL31))
248$(eval $(call add_define,RESET_TO_BL31))
249
Juan Castillo258e94f2014-06-25 17:26:36 +0100250# Process CTX_INCLUDE_FPREGS flag
251$(eval $(call assert_boolean,CTX_INCLUDE_FPREGS))
252$(eval $(call add_define,CTX_INCLUDE_FPREGS))
253
Sandrine Bailleux5fe57c12014-07-17 17:23:14 +0100254# Process ARM_GIC_ARCH flag
255$(eval $(call add_define,ARM_GIC_ARCH))
256
Vikram Kanigiri40d468c2014-12-23 01:00:22 +0000257# Process ARM_CCI_PRODUCT_ID flag
258$(eval $(call add_define,ARM_CCI_PRODUCT_ID))
259
Soby Mathew041f62a2014-07-14 16:58:03 +0100260# Process ASM_ASSERTION flag
261$(eval $(call assert_boolean,ASM_ASSERTION))
262$(eval $(call add_define,ASM_ASSERTION))
Sandrine Bailleux5fe57c12014-07-17 17:23:14 +0100263
Dan Handleycba2c502014-08-08 14:36:42 +0100264# Process LOG_LEVEL flag
265$(eval $(call add_define,LOG_LEVEL))
266
Soby Mathew523d6332015-01-08 18:02:19 +0000267# Process USE_COHERENT_MEM flag
268$(eval $(call assert_boolean,USE_COHERENT_MEM))
269$(eval $(call add_define,USE_COHERENT_MEM))
270
Juan Castillo11abdcd2014-10-21 11:30:42 +0100271# Process Generate CoT flags
272$(eval $(call assert_boolean,GENERATE_COT))
273$(eval $(call assert_boolean,CREATE_KEYS))
Juan Castillo72fe3472015-02-25 12:43:12 +0000274$(eval $(call assert_boolean,SAVE_KEYS))
Juan Castillo11abdcd2014-10-21 11:30:42 +0100275
Juan Castillo5e29c752015-01-07 10:39:25 +0000276# Process TRUSTED_BOARD_BOOT flag
277$(eval $(call assert_boolean,TRUSTED_BOARD_BOOT))
278$(eval $(call add_define,TRUSTED_BOARD_BOOT))
279
Sandrine Bailleux449dbd52015-06-02 17:19:43 +0100280# Process PROGRAMMABLE_RESET_ADDRESS flag
281$(eval $(call assert_boolean,PROGRAMMABLE_RESET_ADDRESS))
282$(eval $(call add_define,PROGRAMMABLE_RESET_ADDRESS))
283
Harry Liebel0af6d642013-12-20 18:51:12 +0000284ASFLAGS += -nostdinc -ffreestanding -Wa,--fatal-warnings \
Sandrine Bailleux47e74a82014-06-23 13:37:53 +0100285 -Werror -Wmissing-include-dirs \
Jeenu Viswambharan19a0ace2014-05-15 14:40:58 +0100286 -mgeneral-regs-only -D__ASSEMBLY__ \
287 ${DEFINES} ${INCLUDES}
Juan Castillo9c25a402015-01-13 12:21:04 +0000288CFLAGS += -nostdinc -ffreestanding -Wall \
Sandrine Bailleux47e74a82014-06-23 13:37:53 +0100289 -Werror -Wmissing-include-dirs \
290 -mgeneral-regs-only -std=c99 -c -Os \
Jeenu Viswambharan19a0ace2014-05-15 14:40:58 +0100291 ${DEFINES} ${INCLUDES}
Andrew Thoelkee01ea342014-03-18 07:13:52 +0000292CFLAGS += -ffunction-sections -fdata-sections
Achin Gupta4f6ad662013-10-25 09:08:21 +0100293
Sandrine Bailleux3e850a82013-11-20 11:50:48 +0000294LDFLAGS += --fatal-warnings -O1
Andrew Thoelkee01ea342014-03-18 07:13:52 +0000295LDFLAGS += --gc-sections
Achin Gupta4f6ad662013-10-25 09:08:21 +0100296
297
James Morrisseyeaaeece2013-11-01 13:56:59 +0000298CC := ${CROSS_COMPILE}gcc
299CPP := ${CROSS_COMPILE}cpp
300AS := ${CROSS_COMPILE}gcc
301AR := ${CROSS_COMPILE}ar
302LD := ${CROSS_COMPILE}ld
303OC := ${CROSS_COMPILE}objcopy
304OD := ${CROSS_COMPILE}objdump
305NM := ${CROSS_COMPILE}nm
306PP := ${CROSS_COMPILE}gcc -E ${CFLAGS}
Achin Gupta4f6ad662013-10-25 09:08:21 +0100307
Harry Liebelf58ad362014-01-10 18:00:33 +0000308# Variables for use with Firmware Image Package
309FIPTOOLPATH ?= tools/fip_create
Achin Gupta375f5382014-02-18 18:12:48 +0000310FIPTOOL ?= ${FIPTOOLPATH}/fip_create
Harry Liebelf58ad362014-01-10 18:00:33 +0000311fiptool: ${FIPTOOL}
Juan Castillo860cc3b2014-11-24 11:45:12 +0000312fip: ${BUILD_PLAT}/${FIP_NAME}
Harry Liebelf58ad362014-01-10 18:00:33 +0000313
Juan Castillo11abdcd2014-10-21 11:30:42 +0100314# Variables for use with Certificate Generation Tool
315CRTTOOLPATH ?= tools/cert_create
316CRTTOOL ?= ${CRTTOOLPATH}/cert_create
317certtool: ${CRTTOOL}
318
319# CoT generation tool default parameters
320TRUSTED_KEY_CERT := ${BUILD_PLAT}/trusted_key.crt
321
322# Pass the private keys to the CoT generation tool in the command line
323# If CREATE_KEYS is set, the '-n' option will be added, indicating the tool to create new keys
324ifneq (${GENERATE_COT},0)
325 $(eval CERTS := yes)
326
Juan Castillo379954c2014-11-04 17:36:40 +0000327 $(eval FIP_DEPS += certificates)
328 $(eval FIP_ARGS += --trusted-key-cert ${TRUSTED_KEY_CERT})
329
Juan Castillo11abdcd2014-10-21 11:30:42 +0100330 ifneq (${CREATE_KEYS},0)
331 $(eval CRT_ARGS += -n)
Juan Castillo72fe3472015-02-25 12:43:12 +0000332 ifneq (${SAVE_KEYS},0)
333 $(eval CRT_ARGS += -k)
334 endif
Juan Castillo11abdcd2014-10-21 11:30:42 +0100335 endif
336 $(eval CRT_ARGS += $(if ${ROT_KEY}, --rot-key ${ROT_KEY}))
337 $(eval CRT_ARGS += $(if ${TRUSTED_WORLD_KEY}, --trusted-world-key ${TRUSTED_WORLD_KEY}))
338 $(eval CRT_ARGS += $(if ${NON_TRUSTED_WORLD_KEY}, --non-trusted-world-key ${NON_TRUSTED_WORLD_KEY}))
339 $(eval CRT_ARGS += --trusted-key-cert ${TRUSTED_KEY_CERT})
Juan Castillof9f39c32015-06-01 16:34:23 +0100340 $(eval CRT_ARGS += $(if ${KEY_ALG}, --key-alg ${KEY_ALG}))
Juan Castillo11abdcd2014-10-21 11:30:42 +0100341endif
342
Juan Castillo13f6a932015-01-13 10:37:27 +0000343# Check Trusted Board Boot options
344ifneq (${TRUSTED_BOARD_BOOT},0)
345 ifeq (${AUTH_MOD},none)
346 $(error Error: When TRUSTED_BOARD_BOOT=1, AUTH_MOD has to be the name of a valid authentication module)
347 else
348 # We expect to locate an *.mk file under the specified AUTH_MOD directory
349 AUTH_MAKE := $(shell m="common/auth/${AUTH_MOD}/${AUTH_MOD}.mk"; [ -f "$$m" ] && echo "$$m")
350 ifeq (${AUTH_MAKE},)
351 $(error Error: No common/auth/${AUTH_MOD}/${AUTH_MOD}.mk located)
352 endif
353 $(info Including ${AUTH_MAKE})
354 include ${AUTH_MAKE}
355 endif
356
357 BL_COMMON_SOURCES += common/auth.c
358endif
359
Juan Castillo9c25a402015-01-13 12:21:04 +0000360# Check if -pedantic option should be used
361ifeq (${DISABLE_PEDANTIC},0)
362 CFLAGS += -pedantic
363endif
364
Ian Spray36eaaf32014-01-30 17:25:28 +0000365locate-checkpatch:
366ifndef CHECKPATCH
367 $(error "Please set CHECKPATCH to point to the Linux checkpatch.pl file, eg: CHECKPATCH=../linux/script/checkpatch.pl")
368else
369ifeq (,$(wildcard ${CHECKPATCH}))
370 $(error "The file CHECKPATCH points to cannot be found, use eg: CHECKPATCH=../linux/script/checkpatch.pl")
371endif
372endif
373
Achin Gupta4f6ad662013-10-25 09:08:21 +0100374clean:
375 @echo " CLEAN"
Ryan Harkin25cff832014-01-13 12:37:03 +0000376 ${Q}rm -rf ${BUILD_PLAT}
Jeenu Viswambharan2f2cef42014-02-19 09:38:18 +0000377 ${Q}${MAKE} --no-print-directory -C ${FIPTOOLPATH} clean
Juan Castillo11abdcd2014-10-21 11:30:42 +0100378 ${Q}${MAKE} PLAT=${PLAT} --no-print-directory -C ${CRTTOOLPATH} clean
Achin Gupta4f6ad662013-10-25 09:08:21 +0100379
James Morrisseyeaaeece2013-11-01 13:56:59 +0000380realclean distclean:
381 @echo " REALCLEAN"
382 ${Q}rm -rf ${BUILD_BASE}
Joakim Bech35fab8c2014-01-23 14:51:49 +0100383 ${Q}rm -f ${CURDIR}/cscope.*
Jeenu Viswambharan2f2cef42014-02-19 09:38:18 +0000384 ${Q}${MAKE} --no-print-directory -C ${FIPTOOLPATH} clean
Juan Castillo11abdcd2014-10-21 11:30:42 +0100385 ${Q}${MAKE} PLAT=${PLAT} --no-print-directory -C ${CRTTOOLPATH} clean
Achin Gupta4f6ad662013-10-25 09:08:21 +0100386
Ian Spray36eaaf32014-01-30 17:25:28 +0000387checkcodebase: locate-checkpatch
388 @echo " CHECKING STYLE"
389 @if test -d .git ; then \
Juan Castillo2d552402014-06-13 17:05:10 +0100390 git ls-files | grep -v stdlib | while read GIT_FILE ; do ${CHECKPATCH} ${CHECKCODE_ARGS} -f $$GIT_FILE ; done ; \
Ian Spray36eaaf32014-01-30 17:25:28 +0000391 else \
Juan Castillo2d552402014-06-13 17:05:10 +0100392 find . -type f -not -iwholename "*.git*" -not -iwholename "*build*" -not -iwholename "*stdlib*" -exec ${CHECKPATCH} ${CHECKCODE_ARGS} -f {} \; ; \
Ian Spray36eaaf32014-01-30 17:25:28 +0000393 fi
394
395checkpatch: locate-checkpatch
396 @echo " CHECKING STYLE"
Sandrine Bailleuxe3dee952015-03-26 15:07:47 +0000397 ${Q}git log -p ${BASE_COMMIT}..HEAD -- ${CHECK_PATHS} | ${CHECKPATCH} ${CHECKPATCH_ARGS} - || true
Ian Spray36eaaf32014-01-30 17:25:28 +0000398
Juan Castillo11abdcd2014-10-21 11:30:42 +0100399.PHONY: ${CRTTOOL}
400${CRTTOOL}:
401 ${Q}${MAKE} PLAT=${PLAT} --no-print-directory -C ${CRTTOOLPATH}
402 @echo
403 @echo "Built $@ successfully"
404 @echo
405
Sandrine Bailleux152c17f2014-10-27 17:10:46 +0000406.PHONY: ${FIPTOOL}
Harry Liebelf58ad362014-01-10 18:00:33 +0000407${FIPTOOL}:
Jeenu Viswambharan2f2cef42014-02-19 09:38:18 +0000408 ${Q}${MAKE} --no-print-directory -C ${FIPTOOLPATH}
Harry Liebelf58ad362014-01-10 18:00:33 +0000409
Jon Medhurst407a95c2014-02-12 15:54:48 +0000410define match_goals
411$(strip $(foreach goal,$(1),$(filter $(goal),$(MAKECMDGOALS))))
412endef
Achin Gupta4f6ad662013-10-25 09:08:21 +0100413
Sandrine Bailleux2d3e42d2014-03-21 14:17:51 +0000414# List of rules that involve building things
415BUILD_TARGETS := all bl1 bl2 bl31 bl32 fip
James Morrisseyeaaeece2013-11-01 13:56:59 +0000416
Sandrine Bailleux2d3e42d2014-03-21 14:17:51 +0000417# Does the list of goals specified on the command line include a build target?
418ifneq ($(call match_goals,${BUILD_TARGETS}),)
419IS_ANYTHING_TO_BUILD := 1
420endif
James Morrisseyeaaeece2013-11-01 13:56:59 +0000421
Jon Medhurst407a95c2014-02-12 15:54:48 +0000422define MAKE_C
James Morrisseyeaaeece2013-11-01 13:56:59 +0000423
Jon Medhurst407a95c2014-02-12 15:54:48 +0000424$(eval OBJ := $(1)/$(patsubst %.c,%.o,$(notdir $(2))))
425$(eval PREREQUISITES := $(patsubst %.o,%.d,$(OBJ)))
James Morrisseyeaaeece2013-11-01 13:56:59 +0000426
Jon Medhurst407a95c2014-02-12 15:54:48 +0000427$(OBJ) : $(2)
428 @echo " CC $$<"
Soby Mathewbeb83d62014-07-16 15:12:21 +0100429 $$(Q)$$(CC) $$(CFLAGS) -DIMAGE_BL$(3) -c $$< -o $$@
Achin Gupta4f6ad662013-10-25 09:08:21 +0100430
James Morrisseyeaaeece2013-11-01 13:56:59 +0000431
Jon Medhurst407a95c2014-02-12 15:54:48 +0000432$(PREREQUISITES) : $(2)
433 @echo " DEPS $$@"
434 @mkdir -p $(1)
435 $$(Q)$$(CC) $$(CFLAGS) -M -MT $(OBJ) -MF $$@ $$<
James Morrisseyeaaeece2013-11-01 13:56:59 +0000436
Sandrine Bailleux2d3e42d2014-03-21 14:17:51 +0000437ifdef IS_ANYTHING_TO_BUILD
Jon Medhurst407a95c2014-02-12 15:54:48 +0000438-include $(PREREQUISITES)
439endif
Achin Gupta4f6ad662013-10-25 09:08:21 +0100440
Jon Medhurst407a95c2014-02-12 15:54:48 +0000441endef
Achin Gupta4f6ad662013-10-25 09:08:21 +0100442
443
Jon Medhurst407a95c2014-02-12 15:54:48 +0000444define MAKE_S
James Morrisseyeaaeece2013-11-01 13:56:59 +0000445
Jon Medhurst407a95c2014-02-12 15:54:48 +0000446$(eval OBJ := $(1)/$(patsubst %.S,%.o,$(notdir $(2))))
447$(eval PREREQUISITES := $(patsubst %.o,%.d,$(OBJ)))
Achin Gupta4f6ad662013-10-25 09:08:21 +0100448
Jon Medhurst407a95c2014-02-12 15:54:48 +0000449$(OBJ) : $(2)
450 @echo " AS $$<"
Soby Mathewbeb83d62014-07-16 15:12:21 +0100451 $$(Q)$$(AS) $$(ASFLAGS) -DIMAGE_BL$(3) -c $$< -o $$@
James Morrisseyeaaeece2013-11-01 13:56:59 +0000452
Jon Medhurst407a95c2014-02-12 15:54:48 +0000453$(PREREQUISITES) : $(2)
454 @echo " DEPS $$@"
455 @mkdir -p $(1)
456 $$(Q)$$(AS) $$(ASFLAGS) -M -MT $(OBJ) -MF $$@ $$<
Achin Gupta4f6ad662013-10-25 09:08:21 +0100457
Sandrine Bailleux2d3e42d2014-03-21 14:17:51 +0000458ifdef IS_ANYTHING_TO_BUILD
Jon Medhurst407a95c2014-02-12 15:54:48 +0000459-include $(PREREQUISITES)
460endif
Achin Gupta4f6ad662013-10-25 09:08:21 +0100461
Jon Medhurst407a95c2014-02-12 15:54:48 +0000462endef
463
464
465define MAKE_LD
466
467$(eval PREREQUISITES := $(1).d)
468
469$(1) : $(2)
470 @echo " PP $$<"
Juan Castilloe33ee5f2014-12-19 09:51:00 +0000471 $$(Q)$$(AS) $$(ASFLAGS) -P -E -D__LINKER__ -o $$@ $$<
Jon Medhurst407a95c2014-02-12 15:54:48 +0000472
473$(PREREQUISITES) : $(2)
474 @echo " DEPS $$@"
475 @mkdir -p $$(dir $$@)
476 $$(Q)$$(AS) $$(ASFLAGS) -M -MT $(1) -MF $$@ $$<
477
Sandrine Bailleux2d3e42d2014-03-21 14:17:51 +0000478ifdef IS_ANYTHING_TO_BUILD
Jon Medhurst407a95c2014-02-12 15:54:48 +0000479-include $(PREREQUISITES)
480endif
481
482endef
483
484
485define MAKE_OBJS
486 $(eval C_OBJS := $(filter %.c,$(2)))
487 $(eval REMAIN := $(filter-out %.c,$(2)))
Soby Mathewbeb83d62014-07-16 15:12:21 +0100488 $(eval $(foreach obj,$(C_OBJS),$(call MAKE_C,$(1),$(obj),$(3))))
Jon Medhurst407a95c2014-02-12 15:54:48 +0000489
490 $(eval S_OBJS := $(filter %.S,$(REMAIN)))
491 $(eval REMAIN := $(filter-out %.S,$(REMAIN)))
Soby Mathewbeb83d62014-07-16 15:12:21 +0100492 $(eval $(foreach obj,$(S_OBJS),$(call MAKE_S,$(1),$(obj),$(3))))
Jon Medhurst407a95c2014-02-12 15:54:48 +0000493
494 $(and $(REMAIN),$(error Unexpected source files present: $(REMAIN)))
495endef
496
497
498# NOTE: The line continuation '\' is required in the next define otherwise we
499# end up with a line-feed characer at the end of the last c filename.
500# Also bare this issue in mind if extending the list of supported filetypes.
501define SOURCES_TO_OBJS
502 $(notdir $(patsubst %.c,%.o,$(filter %.c,$(1)))) \
503 $(notdir $(patsubst %.S,%.o,$(filter %.S,$(1))))
504endef
505
Juan Castillo11abdcd2014-10-21 11:30:42 +0100506
507# MAKE_TOOL_ARGS macro defines the command line arguments for the FIP and CRT
508# tools at each BL stage. Arguments:
509# $(1) = BL stage (2, 30, 31, 32, 33)
510# $(2) = Binary file
511# $(3) = In FIP (false if empty)
512# $(4) = Create certificates (false if empty)
513# $(5) = Create key certificate (false if empty)
514# $(6) = Private key (optional)
515define MAKE_TOOL_ARGS
516
517$(eval FIP_DEPS += $(if $3,$(2),))
518$(eval FIP_ARGS += $(if $3,--bl$(1) $(2),))
Juan Castillo379954c2014-11-04 17:36:40 +0000519$(eval FIP_ARGS += $(if $4,--bl$(1)-cert $(BUILD_PLAT)/bl$(1).crt))
520$(eval FIP_ARGS += $(if $4,$(if $5,--bl$(1)-key-cert $(BUILD_PLAT)/bl$(1)_key.crt)))
Juan Castillo11abdcd2014-10-21 11:30:42 +0100521
522$(eval CRT_DEPS += $(if $4,$(2),))
Juan Castillo11abdcd2014-10-21 11:30:42 +0100523$(eval CRT_ARGS += $(if $4,--bl$(1) $(2)))
524$(eval CRT_ARGS += $(if $4,$(if $6,--bl$(1)-key $(6))))
525$(eval CRT_ARGS += $(if $4,--bl$(1)-cert $(BUILD_PLAT)/bl$(1).crt))
526$(eval CRT_ARGS += $(if $4,$(if $5,--bl$(1)-key-cert $(BUILD_PLAT)/bl$(1)_key.crt)))
527
528endef
529
530
531# MAKE_BL macro defines the targets and options to build each BL image.
532# Arguments:
533# $(1) = BL stage (2, 30, 31, 32, 33)
534# $(2) = In FIP (false if empty)
535# $(3) = Create certificates (false if empty)
536# $(4) = Create key certificate (false if empty)
537# $(5) = Private key (optional)
Jon Medhurst407a95c2014-02-12 15:54:48 +0000538define MAKE_BL
539 $(eval BUILD_DIR := ${BUILD_PLAT}/bl$(1))
540 $(eval SOURCES := $(BL$(1)_SOURCES) $(BL_COMMON_SOURCES) $(PLAT_BL_COMMON_SOURCES))
541 $(eval OBJS := $(addprefix $(BUILD_DIR)/,$(call SOURCES_TO_OBJS,$(SOURCES))))
542 $(eval LINKERFILE := $(BUILD_DIR)/bl$(1).ld)
543 $(eval MAPFILE := $(BUILD_DIR)/bl$(1).map)
544 $(eval ELF := $(BUILD_DIR)/bl$(1).elf)
545 $(eval DUMP := $(BUILD_DIR)/bl$(1).dump)
546 $(eval BIN := $(BUILD_PLAT)/bl$(1).bin)
547
Soby Mathewbeb83d62014-07-16 15:12:21 +0100548 $(eval $(call MAKE_OBJS,$(BUILD_DIR),$(SOURCES),$(1)))
Jon Medhurst407a95c2014-02-12 15:54:48 +0000549 $(eval $(call MAKE_LD,$(LINKERFILE),$(BL$(1)_LINKERFILE)))
550
551$(BUILD_DIR) :
552 $$(Q)mkdir -p "$$@"
553
554$(ELF) : $(OBJS) $(LINKERFILE)
555 @echo " LD $$@"
Juan Castillo04be3a52014-06-30 11:41:46 +0100556 @echo 'const char build_message[] = "Built : "__TIME__", "__DATE__; \
557 const char version_string[] = "${VERSION_STRING}";' | \
Jon Medhurstecf0a712014-02-17 12:18:24 +0000558 $$(CC) $$(CFLAGS) -xc - -o $(BUILD_DIR)/build_message.o
Jon Medhurst407a95c2014-02-12 15:54:48 +0000559 $$(Q)$$(LD) -o $$@ $$(LDFLAGS) -Map=$(MAPFILE) --script $(LINKERFILE) \
Jeenu Viswambharan2a30a752014-03-11 11:06:45 +0000560 $(BUILD_DIR)/build_message.o $(OBJS)
Jon Medhurst407a95c2014-02-12 15:54:48 +0000561
562$(DUMP) : $(ELF)
563 @echo " OD $$@"
564 $${Q}$${OD} -dx $$< > $$@
565
566$(BIN) : $(ELF)
567 @echo " BIN $$@"
568 $$(Q)$$(OC) -O binary $$< $$@
569 @echo
570 @echo "Built $$@ successfully"
571 @echo
572
573.PHONY : bl$(1)
574bl$(1) : $(BUILD_DIR) $(BIN) $(DUMP)
575
576all : bl$(1)
577
Juan Castillo11abdcd2014-10-21 11:30:42 +0100578$(eval $(call MAKE_TOOL_ARGS,$(1),$(BIN),$(2),$(3),$(4),$(5)))
Jon Medhurst407a95c2014-02-12 15:54:48 +0000579
580endef
581
582
Jon Medhurst66573cb2014-02-13 15:19:28 +0000583ifeq (${NEED_BL1},yes)
Jon Medhurst407a95c2014-02-12 15:54:48 +0000584$(eval $(call MAKE_BL,1))
Jon Medhurst66573cb2014-02-13 15:19:28 +0000585endif
Jon Medhurst407a95c2014-02-12 15:54:48 +0000586
Jon Medhurst66573cb2014-02-13 15:19:28 +0000587ifeq (${NEED_BL2},yes)
Juan Castillo11abdcd2014-10-21 11:30:42 +0100588$(if ${BL2}, $(eval $(call MAKE_TOOL_ARGS,2,${BL2},in_fip,${CERTS})),\
589 $(eval $(call MAKE_BL,2,in_fip,${CERTS})))
Jon Medhurst66573cb2014-02-13 15:19:28 +0000590endif
Jon Medhurst407a95c2014-02-12 15:54:48 +0000591
Jon Medhurst66573cb2014-02-13 15:19:28 +0000592ifeq (${NEED_BL31},yes)
Jon Medhurst407a95c2014-02-12 15:54:48 +0000593BL31_SOURCES += ${SPD_SOURCES}
Juan Castillo11abdcd2014-10-21 11:30:42 +0100594$(if ${BL31}, $(eval $(call MAKE_TOOL_ARGS,31,${BL31},in_fip,${CERTS},${CERTS},${BL31_KEY})),\
595 $(eval $(call MAKE_BL,31,in_fip,${CERTS},${CERTS},${BL31_KEY})))
Jon Medhurst66573cb2014-02-13 15:19:28 +0000596endif
Jon Medhurst407a95c2014-02-12 15:54:48 +0000597
598ifeq (${NEED_BL32},yes)
Juan Castillo11abdcd2014-10-21 11:30:42 +0100599$(if ${BL32}, $(eval $(call MAKE_TOOL_ARGS,32,${BL32},in_fip,${CERTS},${CERTS},${BL32_KEY})),\
600 $(eval $(call MAKE_BL,32,in_fip,${CERTS},${CERTS},${BL32_KEY})))
Jon Medhurst407a95c2014-02-12 15:54:48 +0000601endif
Ryan Harkin72ee3312014-01-15 16:55:07 +0000602
Sandrine Bailleuxf841ef02014-06-24 14:19:36 +0100603ifeq (${NEED_BL30},yes)
Juan Castillo11abdcd2014-10-21 11:30:42 +0100604$(if ${BL30}, $(eval $(call MAKE_TOOL_ARGS,30,${BL30},in_fip,${CERTS},${CERTS},${BL30_KEY})))
Sandrine Bailleuxf841ef02014-06-24 14:19:36 +0100605
Sandrine Bailleuxf841ef02014-06-24 14:19:36 +0100606# If BL3-0 is needed by the platform then 'BL30' variable must be defined.
607check_bl30:
608 $(if ${BL30},,$(error "To build a FIP for platform ${PLAT}, please set BL30 to point to the SCP firmware"))
609else
Soby Mathewdbee7fc2014-09-08 17:51:01 +0100610
Sandrine Bailleuxf841ef02014-06-24 14:19:36 +0100611# If BL3-0 is not needed by the platform but the user still specified the path
612# to a BL3-0 image then warn him that it will be ignored.
613check_bl30:
614 $(if ${BL30},$(warning "BL3-0 is not supported on platform ${PLAT}, it will just be ignored"),)
615endif
616
Soby Mathewdbee7fc2014-09-08 17:51:01 +0100617ifeq (${NEED_BL33},yes)
Juan Castillo11abdcd2014-10-21 11:30:42 +0100618$(if ${BL33}, $(eval $(call MAKE_TOOL_ARGS,33,${BL33},in_fip,${CERTS},${CERTS},${BL33_KEY})))
Soby Mathewdbee7fc2014-09-08 17:51:01 +0100619
620# If BL3-3 is needed by the platform then 'BL33' variable must be defined.
621check_bl33:
622 $(if ${BL33},,$(error "To build a FIP, please set BL33 to point to the Normal World binary, eg: BL33=../uefi/FVP_AARCH64_EFI.fd"))
623else
624
625# If BL3-3 is not needed by the platform but the user still specified the path
626# to a BL3-3 image then warn him that it will be ignored.
627check_bl33:
628 $(if ${BL33},$(warning "BL3-3 is not supported on platform ${PLAT}, it will just be ignored"),)
629endif
630
Juan Castillo11abdcd2014-10-21 11:30:42 +0100631# Add the dependency on the certificates
632ifneq (${GENERATE_COT},0)
Juan Castilloa00cbfd2015-03-02 16:16:13 +0000633 fip: certificates
Juan Castillo11abdcd2014-10-21 11:30:42 +0100634endif
635
636certificates: ${CRT_DEPS} ${CRTTOOL} check_bl30 check_bl33
637 ${Q}${CRTTOOL} ${CRT_ARGS}
638 @echo
639 @echo "Built $@ successfully"
640 @echo "Certificates can be found in ${BUILD_PLAT}"
641 @echo
Soby Mathewdbee7fc2014-09-08 17:51:01 +0100642
Juan Castillo860cc3b2014-11-24 11:45:12 +0000643${BUILD_PLAT}/${FIP_NAME}: ${FIP_DEPS} ${FIPTOOL} check_bl30 check_bl33
Harry Liebelf58ad362014-01-10 18:00:33 +0000644 ${Q}${FIPTOOL} --dump \
Achin Gupta375f5382014-02-18 18:12:48 +0000645 ${FIP_ARGS} \
Harry Liebelf58ad362014-01-10 18:00:33 +0000646 $@
647 @echo
Jeenu Viswambharan2f2cef42014-02-19 09:38:18 +0000648 @echo "Built $@ successfully"
649 @echo
Harry Liebelf58ad362014-01-10 18:00:33 +0000650
651
Joakim Bech35fab8c2014-01-23 14:51:49 +0100652cscope:
653 @echo " CSCOPE"
654 ${Q}find ${CURDIR} -name "*.[chsS]" > cscope.files
655 ${Q}cscope -b -q -k
656
Ryan Harkin72ee3312014-01-15 16:55:07 +0000657help:
Dan Handley81be1002015-03-27 17:44:35 +0000658 @echo "usage: ${MAKE} PLAT=<${PLATFORMS}> [OPTIONS] [TARGET]"
Ryan Harkin72ee3312014-01-15 16:55:07 +0000659 @echo ""
660 @echo "PLAT is used to specify which platform you wish to build."
Sandrine Bailleuxa08588a2014-03-21 13:16:35 +0000661 @echo "If no platform is specified, PLAT defaults to: ${DEFAULT_PLAT}"
Ryan Harkin72ee3312014-01-15 16:55:07 +0000662 @echo ""
Sandrine Bailleuxcf8afbd2015-02-18 16:18:00 +0000663 @echo "Please refer to the User Guide for a list of all supported options."
664 @echo "Note that the build system doesn't track dependencies for build "
665 @echo "options. Therefore, if any of the build options are changed "
666 @echo "from a previous build, a clean build must be performed."
667 @echo ""
Ryan Harkin72ee3312014-01-15 16:55:07 +0000668 @echo "Supported Targets:"
Sandrine Bailleuxcf8afbd2015-02-18 16:18:00 +0000669 @echo " all Build all individual bootloader binaries"
Ian Spray36eaaf32014-01-30 17:25:28 +0000670 @echo " bl1 Build the BL1 binary"
Jeenu Viswambharan8aa559c2014-02-21 11:42:08 +0000671 @echo " bl2 Build the BL2 binary"
Sandrine Bailleuxcf8afbd2015-02-18 16:18:00 +0000672 @echo " bl31 Build the BL3-1 binary"
673 @echo " bl32 Build the BL3-2 binary"
674 @echo " fip Build the Firmware Image Package (FIP)"
Ian Spray36eaaf32014-01-30 17:25:28 +0000675 @echo " checkcodebase Check the coding style of the entire source tree"
676 @echo " checkpatch Check the coding style on changes in the current"
677 @echo " branch against BASE_COMMIT (default origin/master)"
678 @echo " clean Clean the build for the selected platform"
Harry Liebelf58ad362014-01-10 18:00:33 +0000679 @echo " cscope Generate cscope index"
Ian Spray36eaaf32014-01-30 17:25:28 +0000680 @echo " distclean Remove all build artifacts for all platforms"
Juan Castillo11abdcd2014-10-21 11:30:42 +0100681 @echo " certtool Build the Certificate generation tool"
Harry Liebelf58ad362014-01-10 18:00:33 +0000682 @echo " fiptool Build the Firmware Image Package(FIP) creation tool"
Ryan Harkin72ee3312014-01-15 16:55:07 +0000683 @echo ""
Sandrine Bailleuxcf8afbd2015-02-18 16:18:00 +0000684 @echo "Note: most build targets require PLAT to be set to a specific platform."
Ryan Harkin72ee3312014-01-15 16:55:07 +0000685 @echo ""
686 @echo "example: build all targets for the FVP platform:"
687 @echo " CROSS_COMPILE=aarch64-none-elf- make PLAT=fvp all"