610 lines
21 KiB
Makefile
610 lines
21 KiB
Makefile
#
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# Copyright (c) 2013-2015, ARM Limited and Contributors. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#
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# Redistributions of source code must retain the above copyright notice, this
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# list of conditions and the following disclaimer.
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#
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# Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions and the following disclaimer in the documentation
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# and/or other materials provided with the distribution.
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#
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# Neither the name of ARM nor the names of its contributors may be used
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# to endorse or promote products derived from this software without specific
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# prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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#
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# Trusted Firmware Version
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#
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VERSION_MAJOR := 1
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VERSION_MINOR := 2
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# Default goal is build all images
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.DEFAULT_GOAL := all
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include make_helpers/build_macros.mk
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################################################################################
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# Default values for build configurations
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################################################################################
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# Build verbosity
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V := 0
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# Debug build
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DEBUG := 0
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# Build platform
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DEFAULT_PLAT := fvp
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PLAT := ${DEFAULT_PLAT}
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# SPD choice
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SPD := none
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# Base commit to perform code check on
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BASE_COMMIT := origin/master
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# NS timer register save and restore
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NS_TIMER_SWITCH := 0
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# By default, BL1 acts as the reset handler, not BL31
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RESET_TO_BL31 := 0
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# Include FP registers in cpu context
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CTX_INCLUDE_FPREGS := 0
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# Determine the version of ARM GIC architecture to use for interrupt management
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# in EL3. The platform port can change this value if needed.
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ARM_GIC_ARCH := 2
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# Determine the version of ARM CCI product used in the platform. The platform
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# port can change this value if needed.
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ARM_CCI_PRODUCT_ID := 400
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# Flag used to indicate if ASM_ASSERTION should be enabled for the build.
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# This defaults to being present in DEBUG builds only.
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ASM_ASSERTION := ${DEBUG}
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# Build option to choose whether Trusted firmware uses Coherent memory or not.
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USE_COHERENT_MEM := 1
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# Flag used to choose the power state format viz Extended State-ID or the Original
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# format.
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PSCI_EXTENDED_STATE_ID := 0
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# Default FIP file name
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FIP_NAME := fip.bin
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# Default FWU_FIP file name
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FWU_FIP_NAME := fwu_fip.bin
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# By default, use the -pedantic option in the gcc command line
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DISABLE_PEDANTIC := 0
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# Flags to generate the Chain of Trust
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GENERATE_COT := 0
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CREATE_KEYS := 1
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SAVE_KEYS := 0
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# Flags to build TF with Trusted Boot support
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TRUSTED_BOARD_BOOT := 0
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# By default, consider that the platform's reset address is not programmable.
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# The platform Makefile is free to override this value.
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PROGRAMMABLE_RESET_ADDRESS := 0
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# Build flag to treat usage of deprecated platform and framework APIs as error.
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ERROR_DEPRECATED := 0
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# By default, consider that the platform may release several CPUs out of reset.
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# The platform Makefile is free to override this value.
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COLD_BOOT_SINGLE_CPU := 0
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# Flag to introduce an infinite loop in BL1 just before it exits into the next
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# image. This is meant to help debugging the post-BL2 phase.
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SPIN_ON_BL1_EXIT := 0
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# Build PL011 UART driver in minimal generic UART mode
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PL011_GENERIC_UART := 0
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################################################################################
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# Checkpatch script options
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################################################################################
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CHECK_IGNORE := --ignore COMPLEX_MACRO \
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--ignore GERRIT_CHANGE_ID \
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--ignore GIT_COMMIT_ID
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CHECKPATCH_ARGS := --no-tree --no-signoff ${CHECK_IGNORE}
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CHECKCODE_ARGS := --no-patch --no-tree --no-signoff ${CHECK_IGNORE}
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# Do not check the coding style on C library files
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CHECK_PATHS := $(shell ls -I include -I lib) \
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$(addprefix include/,$(shell ls -I stdlib include)) \
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$(addprefix lib/,$(shell ls -I stdlib lib))
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################################################################################
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# Process build options
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################################################################################
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# Verbose flag
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ifeq (${V},0)
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Q=@
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CHECKCODE_ARGS += --no-summary --terse
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else
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Q=
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endif
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export Q
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# Process Debug flag
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$(eval $(call add_define,DEBUG))
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ifneq (${DEBUG}, 0)
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BUILD_TYPE := debug
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CFLAGS += -g
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ASFLAGS += -g -Wa,--gdwarf-2
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# Use LOG_LEVEL_INFO by default for debug builds
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LOG_LEVEL := 40
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else
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BUILD_TYPE := release
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$(eval $(call add_define,NDEBUG))
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# Use LOG_LEVEL_NOTICE by default for release builds
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LOG_LEVEL := 20
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endif
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# Default build string (git branch and commit)
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ifeq (${BUILD_STRING},)
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BUILD_STRING := $(shell git log -n 1 --pretty=format:"%h")
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endif
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VERSION_STRING := v${VERSION_MAJOR}.${VERSION_MINOR}(${BUILD_TYPE}):${BUILD_STRING}
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# The cert_create tool cannot generate certificates individually, so we use the
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# target 'certificates' to create them all
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ifneq (${GENERATE_COT},0)
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FIP_DEPS += certificates
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FWU_FIP_DEPS += fwu_certificates
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endif
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################################################################################
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# Toolchain
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################################################################################
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CC := ${CROSS_COMPILE}gcc
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CPP := ${CROSS_COMPILE}cpp
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AS := ${CROSS_COMPILE}gcc
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AR := ${CROSS_COMPILE}ar
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LD := ${CROSS_COMPILE}ld
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OC := ${CROSS_COMPILE}objcopy
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OD := ${CROSS_COMPILE}objdump
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NM := ${CROSS_COMPILE}nm
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PP := ${CROSS_COMPILE}gcc -E
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ASFLAGS += -nostdinc -ffreestanding -Wa,--fatal-warnings \
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-Werror -Wmissing-include-dirs \
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-mgeneral-regs-only -D__ASSEMBLY__ \
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${DEFINES} ${INCLUDES}
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CFLAGS += -nostdinc -ffreestanding -Wall \
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-Werror -Wmissing-include-dirs \
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-mgeneral-regs-only -mstrict-align \
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-std=c99 -c -Os \
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${DEFINES} ${INCLUDES}
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CFLAGS += -ffunction-sections -fdata-sections
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LDFLAGS += --fatal-warnings -O1
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LDFLAGS += --gc-sections
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################################################################################
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# Common sources and include directories
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################################################################################
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BL_COMMON_SOURCES += common/bl_common.c \
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common/tf_printf.c \
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common/aarch64/debug.S \
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lib/aarch64/cache_helpers.S \
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lib/aarch64/misc_helpers.S \
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lib/aarch64/xlat_helpers.c \
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lib/stdlib/std.c \
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plat/common/aarch64/platform_helpers.S
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INCLUDES += -Iinclude/bl1 \
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-Iinclude/bl31 \
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-Iinclude/bl31/services \
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-Iinclude/common \
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-Iinclude/drivers \
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-Iinclude/drivers/arm \
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-Iinclude/drivers/auth \
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-Iinclude/drivers/io \
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-Iinclude/drivers/ti/uart \
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-Iinclude/lib \
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-Iinclude/lib/aarch64 \
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-Iinclude/lib/cpus/aarch64 \
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-Iinclude/plat/common \
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-Iinclude/stdlib \
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-Iinclude/stdlib/sys \
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${PLAT_INCLUDES} \
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${SPD_INCLUDES}
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################################################################################
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# Generic definitions
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################################################################################
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BUILD_BASE := ./build
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BUILD_PLAT := ${BUILD_BASE}/${PLAT}/${BUILD_TYPE}
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PLAT_MAKEFILE := platform.mk
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# Generate the platforms list by recursively searching for all directories
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# under /plat containing a PLAT_MAKEFILE. Append each platform with a `|`
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# char and strip out the final '|'.
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PLATFORMS := $(shell find plat/ -name '${PLAT_MAKEFILE}' -print0 | \
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sed -r 's%[^\x00]*\/([^/]*)\/${PLAT_MAKEFILE}\x00%\1|%g' | \
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sed -r 's/\|$$//')
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SPDS := $(shell ls -I none services/spd)
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# Platforms providing their own TBB makefile may override this value
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INCLUDE_TBBR_MK := 1
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################################################################################
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# Include SPD Makefile if one has been specified
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################################################################################
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ifneq (${SPD},none)
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ifdef EL3_PAYLOAD_BASE
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$(warning "SPD and EL3_PAYLOAD_BASE are incompatible build options.")
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$(warning "The SPD and its BL32 companion will be present but ignored.")
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endif
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# We expect to locate an spd.mk under the specified SPD directory
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SPD_MAKE := $(shell m="services/spd/${SPD}/${SPD}.mk"; [ -f "$$m" ] && echo "$$m")
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ifeq (${SPD_MAKE},)
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$(error Error: No services/spd/${SPD}/${SPD}.mk located)
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endif
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$(info Including ${SPD_MAKE})
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include ${SPD_MAKE}
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# If there's BL32 companion for the chosen SPD, we expect that the SPD's
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# Makefile would set NEED_BL32 to "yes". In this case, the build system
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# supports two mutually exclusive options:
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# * BL32 is built from source: then BL32_SOURCES must contain the list
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# of source files to build BL32
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# * BL32 is a prebuilt binary: then BL32 must point to the image file
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# that will be included in the FIP
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# If both BL32_SOURCES and BL32 are defined, the binary takes precedence
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# over the sources.
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endif
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################################################################################
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# Include the platform specific Makefile after the SPD Makefile (the platform
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# makefile may use all previous definitions in this file)
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################################################################################
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ifeq (${PLAT},)
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$(error "Error: Unknown platform. Please use PLAT=<platform name> to specify the platform")
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endif
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PLAT_MAKEFILE_FULL := $(shell find plat/ -wholename '*/${PLAT}/${PLAT_MAKEFILE}')
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ifeq ($(PLAT_MAKEFILE_FULL),)
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$(error "Error: Invalid platform. The following platforms are available: ${PLATFORMS}")
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endif
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include ${PLAT_MAKEFILE_FULL}
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# If the platform has not defined ENABLE_PLAT_COMPAT, then enable it by default
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ifndef ENABLE_PLAT_COMPAT
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ENABLE_PLAT_COMPAT := 1
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endif
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# Include the platform compatibility helpers for PSCI
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ifneq (${ENABLE_PLAT_COMPAT}, 0)
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include plat/compat/plat_compat.mk
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endif
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# Include the CPU specific operations makefile. By default all CPU errata
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# workarounds and CPU specific optimisations are disabled. This can be
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# overridden by the platform.
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include lib/cpus/cpu-ops.mk
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################################################################################
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# Process platform overrideable behaviour
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################################################################################
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# Check if -pedantic option should be used
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ifeq (${DISABLE_PEDANTIC},0)
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CFLAGS += -pedantic
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endif
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# Using the ARM Trusted Firmware BL2 implies that a BL33 image also needs to be
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# supplied for the FIP and Certificate generation tools. This flag can be
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# overridden by the platform.
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ifdef BL2_SOURCES
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ifndef EL3_PAYLOAD_BASE
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NEED_BL33 ?= yes
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else
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# The BL33 image is not needed when booting an EL3 payload.
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NEED_BL33 := no
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endif
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endif
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# Process TBB related flags
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ifneq (${GENERATE_COT},0)
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# Common cert_create options
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ifneq (${CREATE_KEYS},0)
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$(eval CRT_ARGS += -n)
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$(eval FWU_CRT_ARGS += -n)
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ifneq (${SAVE_KEYS},0)
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$(eval CRT_ARGS += -k)
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$(eval FWU_CRT_ARGS += -k)
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endif
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endif
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# Include TBBR makefile (unless the platform indicates otherwise)
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ifeq (${INCLUDE_TBBR_MK},1)
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include make_helpers/tbbr/tbbr_tools.mk
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endif
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endif
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################################################################################
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# Auxiliary tools (fip_create, cert_create, etc)
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################################################################################
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# Variables for use with Certificate Generation Tool
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CRTTOOLPATH ?= tools/cert_create
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CRTTOOL ?= ${CRTTOOLPATH}/cert_create
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# Variables for use with Firmware Image Package
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FIPTOOLPATH ?= tools/fip_create
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FIPTOOL ?= ${FIPTOOLPATH}/fip_create
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################################################################################
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# Build options checks
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################################################################################
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$(eval $(call assert_boolean,DEBUG))
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$(eval $(call assert_boolean,NS_TIMER_SWITCH))
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$(eval $(call assert_boolean,RESET_TO_BL31))
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$(eval $(call assert_boolean,CTX_INCLUDE_FPREGS))
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$(eval $(call assert_boolean,ASM_ASSERTION))
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$(eval $(call assert_boolean,USE_COHERENT_MEM))
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$(eval $(call assert_boolean,DISABLE_PEDANTIC))
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$(eval $(call assert_boolean,GENERATE_COT))
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$(eval $(call assert_boolean,CREATE_KEYS))
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$(eval $(call assert_boolean,SAVE_KEYS))
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$(eval $(call assert_boolean,TRUSTED_BOARD_BOOT))
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$(eval $(call assert_boolean,PROGRAMMABLE_RESET_ADDRESS))
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$(eval $(call assert_boolean,COLD_BOOT_SINGLE_CPU))
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$(eval $(call assert_boolean,PSCI_EXTENDED_STATE_ID))
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$(eval $(call assert_boolean,ERROR_DEPRECATED))
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$(eval $(call assert_boolean,ENABLE_PLAT_COMPAT))
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$(eval $(call assert_boolean,SPIN_ON_BL1_EXIT))
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$(eval $(call assert_boolean,PL011_GENERIC_UART))
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################################################################################
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# Add definitions to the cpp preprocessor based on the current build options.
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# This is done after including the platform specific makefile to allow the
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# platform to overwrite the default options
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################################################################################
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$(eval $(call add_define,PLAT_${PLAT}))
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$(eval $(call add_define,NS_TIMER_SWITCH))
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$(eval $(call add_define,RESET_TO_BL31))
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$(eval $(call add_define,CTX_INCLUDE_FPREGS))
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$(eval $(call add_define,ARM_GIC_ARCH))
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$(eval $(call add_define,ARM_CCI_PRODUCT_ID))
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$(eval $(call add_define,ASM_ASSERTION))
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$(eval $(call add_define,LOG_LEVEL))
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$(eval $(call add_define,USE_COHERENT_MEM))
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$(eval $(call add_define,TRUSTED_BOARD_BOOT))
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$(eval $(call add_define,PROGRAMMABLE_RESET_ADDRESS))
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$(eval $(call add_define,COLD_BOOT_SINGLE_CPU))
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$(eval $(call add_define,PSCI_EXTENDED_STATE_ID))
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$(eval $(call add_define,ERROR_DEPRECATED))
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$(eval $(call add_define,ENABLE_PLAT_COMPAT))
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$(eval $(call add_define,SPIN_ON_BL1_EXIT))
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# Define the EL3_PAYLOAD_BASE flag only if it is provided.
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ifdef EL3_PAYLOAD_BASE
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$(eval $(call add_define,EL3_PAYLOAD_BASE))
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endif
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$(eval $(call add_define,PL011_GENERIC_UART))
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################################################################################
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# Include BL specific makefiles
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################################################################################
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ifdef BL1_SOURCES
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NEED_BL1 := yes
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include bl1/bl1.mk
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endif
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ifdef BL2_SOURCES
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NEED_BL2 := yes
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include bl2/bl2.mk
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endif
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ifdef BL2U_SOURCES
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NEED_BL2U := yes
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include bl2u/bl2u.mk
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endif
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ifdef BL31_SOURCES
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# When booting an EL3 payload, there is no need to compile the BL31 image nor
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# put it in the FIP.
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ifndef EL3_PAYLOAD_BASE
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NEED_BL31 := yes
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include bl31/bl31.mk
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endif
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endif
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################################################################################
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# Build targets
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################################################################################
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.PHONY: all msg_start clean realclean distclean cscope locate-checkpatch checkcodebase checkpatch fiptool fip fwu_fip certtool
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.SUFFIXES:
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all: msg_start
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msg_start:
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@echo "Building ${PLAT}"
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# Check if deprecated declarations should be treated as error or not.
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ifeq (${ERROR_DEPRECATED},0)
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CFLAGS += -Wno-error=deprecated-declarations
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endif
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# Expand build macros for the different images
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ifeq (${NEED_BL1},yes)
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$(eval $(call MAKE_BL,1))
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endif
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ifeq (${NEED_BL2},yes)
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$(if ${BL2}, $(eval $(call MAKE_TOOL_ARGS,2,${BL2},in_fip)),\
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$(eval $(call MAKE_BL,2,in_fip)))
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endif
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ifeq (${NEED_BL31},yes)
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BL31_SOURCES += ${SPD_SOURCES}
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$(if ${BL31}, $(eval $(call MAKE_TOOL_ARGS,31,${BL31},in_fip)),\
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$(eval $(call MAKE_BL,31,in_fip)))
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endif
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# If a BL32 image is needed but neither BL32 nor BL32_SOURCES is defined, the
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# build system will call FIP_ADD_IMG to print a warning message and abort the
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# process. Note that the dependency on BL32 applies to the FIP only.
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ifeq (${NEED_BL32},yes)
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$(if ${BL32}, $(eval $(call MAKE_TOOL_ARGS,32,${BL32},in_fip)),\
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$(if ${BL32_SOURCES}, $(eval $(call MAKE_BL,32,in_fip)),\
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$(eval $(call FIP_ADD_IMG,BL32,--bl32))))
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endif
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# Add the BL33 image if required by the platform
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ifeq (${NEED_BL33},yes)
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$(eval $(call FIP_ADD_IMG,BL33,--bl33))
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endif
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ifeq (${NEED_BL2U},yes)
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BL2U_PATH := $(if ${BL2U},${BL2U},$(call IMG_BIN,2u))
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$(if ${BL2U}, ,$(eval $(call MAKE_BL,2u)))
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$(eval $(call FWU_FIP_ADD_PAYLOAD,${BL2U_PATH},--bl2u))
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endif
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locate-checkpatch:
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ifndef CHECKPATCH
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$(error "Please set CHECKPATCH to point to the Linux checkpatch.pl file, eg: CHECKPATCH=../linux/script/checkpatch.pl")
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else
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ifeq (,$(wildcard ${CHECKPATCH}))
|
|
$(error "The file CHECKPATCH points to cannot be found, use eg: CHECKPATCH=../linux/script/checkpatch.pl")
|
|
endif
|
|
endif
|
|
|
|
clean:
|
|
@echo " CLEAN"
|
|
${Q}rm -rf ${BUILD_PLAT}
|
|
${Q}${MAKE} --no-print-directory -C ${FIPTOOLPATH} clean
|
|
${Q}${MAKE} PLAT=${PLAT} --no-print-directory -C ${CRTTOOLPATH} clean
|
|
|
|
realclean distclean:
|
|
@echo " REALCLEAN"
|
|
${Q}rm -rf ${BUILD_BASE}
|
|
${Q}rm -f ${CURDIR}/cscope.*
|
|
${Q}${MAKE} --no-print-directory -C ${FIPTOOLPATH} clean
|
|
${Q}${MAKE} PLAT=${PLAT} --no-print-directory -C ${CRTTOOLPATH} clean
|
|
|
|
checkcodebase: locate-checkpatch
|
|
@echo " CHECKING STYLE"
|
|
@if test -d .git ; then \
|
|
git ls-files | grep -v stdlib | while read GIT_FILE ; do ${CHECKPATCH} ${CHECKCODE_ARGS} -f $$GIT_FILE ; done ; \
|
|
else \
|
|
find . -type f -not -iwholename "*.git*" -not -iwholename "*build*" -not -iwholename "*stdlib*" -exec ${CHECKPATCH} ${CHECKCODE_ARGS} -f {} \; ; \
|
|
fi
|
|
|
|
checkpatch: locate-checkpatch
|
|
@echo " CHECKING STYLE"
|
|
${Q}git log -p ${BASE_COMMIT}..HEAD -- ${CHECK_PATHS} | ${CHECKPATCH} ${CHECKPATCH_ARGS} - || true
|
|
|
|
certtool: ${CRTTOOL}
|
|
|
|
.PHONY: ${CRTTOOL}
|
|
${CRTTOOL}:
|
|
${Q}${MAKE} PLAT=${PLAT} --no-print-directory -C ${CRTTOOLPATH}
|
|
@echo
|
|
@echo "Built $@ successfully"
|
|
@echo
|
|
|
|
ifneq (${GENERATE_COT},0)
|
|
certificates: ${CRT_DEPS} ${CRTTOOL}
|
|
${Q}${CRTTOOL} ${CRT_ARGS}
|
|
@echo
|
|
@echo "Built $@ successfully"
|
|
@echo "Certificates can be found in ${BUILD_PLAT}"
|
|
@echo
|
|
endif
|
|
|
|
${BUILD_PLAT}/${FIP_NAME}: ${FIP_DEPS} ${FIPTOOL}
|
|
${Q}${FIPTOOL} --dump ${FIP_ARGS} $@
|
|
@echo
|
|
@echo "Built $@ successfully"
|
|
@echo
|
|
|
|
ifneq (${GENERATE_COT},0)
|
|
fwu_certificates: ${FWU_CRT_DEPS} ${CRTTOOL}
|
|
${Q}${CRTTOOL} ${FWU_CRT_ARGS}
|
|
@echo
|
|
@echo "Built $@ successfully"
|
|
@echo "FWU certificates can be found in ${BUILD_PLAT}"
|
|
@echo
|
|
endif
|
|
|
|
${BUILD_PLAT}/${FWU_FIP_NAME}: ${FWU_FIP_DEPS} ${FIPTOOL}
|
|
${Q}${FIPTOOL} --dump ${FWU_FIP_ARGS} $@
|
|
@echo
|
|
@echo "Built $@ successfully"
|
|
@echo
|
|
|
|
fiptool: ${FIPTOOL}
|
|
fip: ${BUILD_PLAT}/${FIP_NAME}
|
|
fwu_fip: ${BUILD_PLAT}/${FWU_FIP_NAME}
|
|
|
|
.PHONY: ${FIPTOOL}
|
|
${FIPTOOL}:
|
|
${Q}${MAKE} --no-print-directory -C ${FIPTOOLPATH}
|
|
|
|
cscope:
|
|
@echo " CSCOPE"
|
|
${Q}find ${CURDIR} -name "*.[chsS]" > cscope.files
|
|
${Q}cscope -b -q -k
|
|
|
|
help:
|
|
@echo "usage: ${MAKE} PLAT=<${PLATFORMS}> [OPTIONS] [TARGET]"
|
|
@echo ""
|
|
@echo "PLAT is used to specify which platform you wish to build."
|
|
@echo "If no platform is specified, PLAT defaults to: ${DEFAULT_PLAT}"
|
|
@echo ""
|
|
@echo "Please refer to the User Guide for a list of all supported options."
|
|
@echo "Note that the build system doesn't track dependencies for build "
|
|
@echo "options. Therefore, if any of the build options are changed "
|
|
@echo "from a previous build, a clean build must be performed."
|
|
@echo ""
|
|
@echo "Supported Targets:"
|
|
@echo " all Build all individual bootloader binaries"
|
|
@echo " bl1 Build the BL1 binary"
|
|
@echo " bl2 Build the BL2 binary"
|
|
@echo " bl2u Build the BL2U binary"
|
|
@echo " bl31 Build the BL31 binary"
|
|
@echo " bl32 Build the BL32 binary"
|
|
@echo " certificates Build the certificates (requires 'GENERATE_COT=1')"
|
|
@echo " fip Build the Firmware Image Package (FIP)"
|
|
@echo " fwu_fip Build the FWU Firmware Image Package (FIP)"
|
|
@echo " checkcodebase Check the coding style of the entire source tree"
|
|
@echo " checkpatch Check the coding style on changes in the current"
|
|
@echo " branch against BASE_COMMIT (default origin/master)"
|
|
@echo " clean Clean the build for the selected platform"
|
|
@echo " cscope Generate cscope index"
|
|
@echo " distclean Remove all build artifacts for all platforms"
|
|
@echo " certtool Build the Certificate generation tool"
|
|
@echo " fiptool Build the Firmware Image Package(FIP) creation tool"
|
|
@echo ""
|
|
@echo "Note: most build targets require PLAT to be set to a specific platform."
|
|
@echo ""
|
|
@echo "example: build all targets for the FVP platform:"
|
|
@echo " CROSS_COMPILE=aarch64-none-elf- make PLAT=fvp all"
|