1# 2# (C) Copyright 2000-2002 3# Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4# 5# SPDX-License-Identifier: GPL-2.0+ 6# 7 8ifndef CONFIG_STANDALONE_LOAD_ADDR 9ifneq ($(CONFIG_OMAP_COMMON),) 10CONFIG_STANDALONE_LOAD_ADDR = 0x80300000 11else 12CONFIG_STANDALONE_LOAD_ADDR = 0xc100000 13endif 14endif 15 16LDFLAGS_FINAL += --gc-sections 17PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections \ 18 -fno-common -ffixed-r9 19PLATFORM_RELFLAGS += $(call cc-option, -msoft-float) \ 20 $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) 21 22PLATFORM_CPPFLAGS += -D__ARM__ 23 24# Choose between ARM/Thumb instruction sets 25ifeq ($(CONFIG_SYS_THUMB_BUILD),y) 26AFLAGS_IMPLICIT_IT := $(call as-option,-Wa$(comma)-mimplicit-it=always) 27PF_CPPFLAGS_ARM := $(AFLAGS_IMPLICIT_IT) \ 28 $(call cc-option, -mthumb -mthumb-interwork,\ 29 $(call cc-option,-marm,)\ 30 $(call cc-option,-mno-thumb-interwork,)\ 31 ) 32else 33PF_CPPFLAGS_ARM := $(call cc-option,-marm,) \ 34 $(call cc-option,-mno-thumb-interwork,) 35endif 36 37# Only test once 38ifneq ($(CONFIG_SPL_BUILD),y) 39ifeq ($(CONFIG_SYS_THUMB_BUILD),y) 40archprepare: checkthumb 41 42checkthumb: 43 @if test "$(call cc-version)" -lt "0404"; then \ 44 echo -n '*** Your GCC does not produce working '; \ 45 echo 'binaries in THUMB mode.'; \ 46 echo '*** Your board is configured for THUMB mode.'; \ 47 false; \ 48 fi 49endif 50endif 51 52# Try if EABI is supported, else fall back to old API, 53# i. e. for example: 54# - with ELDK 4.2 (EABI supported), use: 55# -mabi=aapcs-linux 56# - with ELDK 4.1 (gcc 4.x, no EABI), use: 57# -mabi=apcs-gnu 58# - with ELDK 3.1 (gcc 3.x), use: 59# -mapcs-32 60PF_CPPFLAGS_ABI := $(call cc-option,\ 61 -mabi=aapcs-linux,\ 62 $(call cc-option,\ 63 -mapcs-32,\ 64 $(call cc-option,\ 65 -mabi=apcs-gnu,\ 66 )\ 67 )\ 68 ) 69PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_ARM) $(PF_CPPFLAGS_ABI) 70 71# For EABI, make sure to provide raise() 72ifneq (,$(findstring -mabi=aapcs-linux,$(PLATFORM_CPPFLAGS))) 73# This file is parsed many times, so the string may get added multiple 74# times. Also, the prefix needs to be different based on whether 75# CONFIG_SPL_BUILD is defined or not. 'filter-out' the existing entry 76# before adding the correct one. 77PLATFORM_LIBS := arch/arm/lib/eabi_compat.o \ 78 $(filter-out arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS)) 79endif 80 81# needed for relocation 82LDFLAGS_u-boot += -pie 83 84# 85# FIXME: binutils versions < 2.22 have a bug in the assembler where 86# branches to weak symbols can be incorrectly optimized in thumb mode 87# to a short branch (b.n instruction) that won't reach when the symbol 88# gets preempted 89# 90# http://sourceware.org/bugzilla/show_bug.cgi?id=12532 91# 92ifeq ($(CONFIG_SYS_THUMB_BUILD),y) 93ifeq ($(GAS_BUG_12532),) 94export GAS_BUG_12532:=$(shell if [ $(call binutils-version) -lt 0222 ] ; \ 95 then echo y; else echo n; fi) 96endif 97ifeq ($(GAS_BUG_12532),y) 98PLATFORM_RELFLAGS += -fno-optimize-sibling-calls 99endif 100endif 101 102ifneq ($(CONFIG_SPL_BUILD),y) 103# Check that only R_ARM_RELATIVE relocations are generated. 104ALL-y += checkarmreloc 105# The movt / movw can hardcode 16 bit parts of the addresses in the 106# instruction. Relocation is not supported for that case, so disable 107# such usage by requiring word relocations. 108PLATFORM_CPPFLAGS += $(call cc-option, -mword-relocations) 109endif 110 111# limit ourselves to the sections we want in the .bin. 112ifdef CONFIG_ARM64 113OBJCOPYFLAGS += -j .text -j .rodata -j .data -j .u_boot_list -j .rela.dyn 114else 115OBJCOPYFLAGS += -j .text -j .secure_text -j .rodata -j .hash -j .data -j \ 116 .got -j .got.plt -j .u_boot_list -j .rel.dyn 117endif 118 119ifdef CONFIG_OF_EMBED 120OBJCOPYFLAGS += -j .dtb.init.rodata 121endif 122 123ifneq ($(CONFIG_IMX_CONFIG),) 124ifdef CONFIG_SPL 125ifndef CONFIG_SPL_BUILD 126ALL-y += SPL 127endif 128else 129ifeq ($(CONFIG_OF_SEPARATE),y) 130ALL-y += u-boot-dtb.imx 131else 132ALL-y += u-boot.imx 133endif 134endif 135endif 136