1# SPDX-License-Identifier: GPL-2.0+ 2# 3# (C) Copyright 2000-2002 4# Wolfgang Denk, DENX Software Engineering, wd@denx.de. 5 6ifndef CONFIG_STANDALONE_LOAD_ADDR 7ifneq ($(CONFIG_ARCH_OMAP2PLUS),) 8CONFIG_STANDALONE_LOAD_ADDR = 0x80300000 9else 10CONFIG_STANDALONE_LOAD_ADDR = 0xc100000 11endif 12endif 13 14CFLAGS_NON_EFI := -fno-pic -ffixed-r9 -ffunction-sections -fdata-sections 15CFLAGS_EFI := -fpic -fshort-wchar 16 17LDFLAGS_FINAL += --gc-sections 18PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections \ 19 -fno-common -ffixed-r9 20PLATFORM_RELFLAGS += $(call cc-option, -msoft-float) \ 21 $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) 22 23# LLVM support 24LLVM_RELFLAGS := $(call cc-option,-mllvm,) \ 25 $(call cc-option,-mno-movt,) 26PLATFORM_RELFLAGS += $(LLVM_RELFLAGS) 27 28PLATFORM_CPPFLAGS += -D__ARM__ 29 30ifdef CONFIG_ARM64 31PLATFORM_ELFFLAGS += -B aarch64 -O elf64-littleaarch64 32else 33PLATFORM_ELFFLAGS += -B arm -O elf32-littlearm 34endif 35 36# Choose between ARM/Thumb instruction sets 37ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y) 38AFLAGS_IMPLICIT_IT := $(call as-option,-Wa$(comma)-mimplicit-it=always) 39PF_CPPFLAGS_ARM := $(AFLAGS_IMPLICIT_IT) \ 40 $(call cc-option, -mthumb -mthumb-interwork,\ 41 $(call cc-option,-marm,)\ 42 $(call cc-option,-mno-thumb-interwork,)\ 43 ) 44else 45PF_CPPFLAGS_ARM := $(call cc-option,-marm,) \ 46 $(call cc-option,-mno-thumb-interwork,) 47endif 48 49# Only test once 50ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y) 51archprepare: checkthumb checkgcc6 52 53checkthumb: 54 @if test "$(call cc-name)" = "gcc" -a \ 55 "$(call cc-version)" -lt "0404"; then \ 56 echo -n '*** Your GCC does not produce working '; \ 57 echo 'binaries in THUMB mode.'; \ 58 echo '*** Your board is configured for THUMB mode.'; \ 59 false; \ 60 fi 61else 62archprepare: checkgcc6 63endif 64 65checkgcc6: 66 @if test "$(call cc-name)" = "gcc" -a \ 67 "$(call cc-version)" -lt "0600"; then \ 68 echo '*** Your GCC is older than 6.0 and is not supported'; \ 69 false; \ 70 fi 71 72 73# Try if EABI is supported, else fall back to old API, 74# i. e. for example: 75# - with ELDK 4.2 (EABI supported), use: 76# -mabi=aapcs-linux 77# - with ELDK 4.1 (gcc 4.x, no EABI), use: 78# -mabi=apcs-gnu 79# - with ELDK 3.1 (gcc 3.x), use: 80# -mapcs-32 81PF_CPPFLAGS_ABI := $(call cc-option,\ 82 -mabi=aapcs-linux,\ 83 $(call cc-option,\ 84 -mapcs-32,\ 85 $(call cc-option,\ 86 -mabi=apcs-gnu,\ 87 )\ 88 )\ 89 ) 90PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_ARM) $(PF_CPPFLAGS_ABI) 91 92# For EABI, make sure to provide raise() 93ifneq (,$(findstring -mabi=aapcs-linux,$(PLATFORM_CPPFLAGS))) 94# This file is parsed many times, so the string may get added multiple 95# times. Also, the prefix needs to be different based on whether 96# CONFIG_SPL_BUILD is defined or not. 'filter-out' the existing entry 97# before adding the correct one. 98PLATFORM_LIBS := arch/arm/lib/eabi_compat.o \ 99 $(filter-out arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS)) 100endif 101 102# needed for relocation 103LDFLAGS_u-boot += -pie 104 105# 106# FIXME: binutils versions < 2.22 have a bug in the assembler where 107# branches to weak symbols can be incorrectly optimized in thumb mode 108# to a short branch (b.n instruction) that won't reach when the symbol 109# gets preempted 110# 111# http://sourceware.org/bugzilla/show_bug.cgi?id=12532 112# 113ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y) 114ifeq ($(GAS_BUG_12532),) 115export GAS_BUG_12532:=$(shell if [ $(call binutils-version) -lt 0222 ] ; \ 116 then echo y; else echo n; fi) 117endif 118ifeq ($(GAS_BUG_12532),y) 119PLATFORM_RELFLAGS += -fno-optimize-sibling-calls 120endif 121endif 122 123ifneq ($(CONFIG_SPL_BUILD),y) 124# Check that only R_ARM_RELATIVE relocations are generated. 125ALL-y += checkarmreloc 126# The movt / movw can hardcode 16 bit parts of the addresses in the 127# instruction. Relocation is not supported for that case, so disable 128# such usage by requiring word relocations. 129PLATFORM_CPPFLAGS += $(call cc-option, -mword-relocations) 130PLATFORM_CPPFLAGS += $(call cc-option, -fno-pic) 131endif 132 133# limit ourselves to the sections we want in the .bin. 134ifdef CONFIG_ARM64 135OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .data \ 136 -j .u_boot_list -j .rela.dyn -j .got -j .got.plt \ 137 -j .binman_sym_table -j .text_rest 138else 139OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .hash \ 140 -j .data -j .got -j .got.plt -j .u_boot_list -j .rel.dyn \ 141 -j .binman_sym_table -j .text_rest 142endif 143 144# if a dtb section exists we always have to include it 145# there are only two cases where it is generated 146# 1) OF_EMBEDED is turned on 147# 2) unit tests include device tree blobs 148OBJCOPYFLAGS += -j .dtb.init.rodata 149 150ifdef CONFIG_EFI_LOADER 151OBJCOPYFLAGS += -j .efi_runtime -j .efi_runtime_rel 152endif 153 154ifneq ($(CONFIG_IMX_CONFIG),) 155ifdef CONFIG_SPL 156ifndef CONFIG_SPL_BUILD 157ALL-y += SPL 158endif 159else 160ifeq ($(CONFIG_OF_SEPARATE),y) 161ALL-y += u-boot-dtb.imx 162else 163ALL-y += u-boot.imx 164endif 165endif 166ifneq ($(CONFIG_VF610),) 167ALL-y += u-boot.vyb 168endif 169endif 170 171EFI_LDS := elf_arm_efi.lds 172EFI_CRT0 := crt0_arm_efi.o 173EFI_RELOC := reloc_arm_efi.o 174