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_ARCH_OMAP2PLUS),) 10CONFIG_STANDALONE_LOAD_ADDR = 0x80300000 11else 12CONFIG_STANDALONE_LOAD_ADDR = 0xc100000 13endif 14endif 15 16CFLAGS_NON_EFI := -fno-pic -ffixed-r9 -ffunction-sections -fdata-sections 17CFLAGS_EFI := -fpic -fshort-wchar 18 19LDFLAGS_FINAL += --gc-sections 20PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections \ 21 -fno-common -ffixed-r9 22PLATFORM_RELFLAGS += $(call cc-option, -msoft-float) \ 23 $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) 24 25# LLVM support 26LLVMS_RELFLAGS := $(call cc-option,-mllvm,) \ 27 $(call cc-option,-target arm-none-eabi,) \ 28 $(call cc-option,-arm-use-movt=0,) 29PLATFORM_RELFLAGS += $(LLVM_RELFLAGS) 30 31PLATFORM_CPPFLAGS += -D__ARM__ 32 33ifdef CONFIG_ARM64 34PLATFORM_ELFFLAGS += -B aarch64 -O elf64-littleaarch64 35else 36PLATFORM_ELFFLAGS += -B arm -O elf32-littlearm 37endif 38 39# Choose between ARM/Thumb instruction sets 40ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y) 41AFLAGS_IMPLICIT_IT := $(call as-option,-Wa$(comma)-mimplicit-it=always) 42PF_CPPFLAGS_ARM := $(AFLAGS_IMPLICIT_IT) \ 43 $(call cc-option, -mthumb -mthumb-interwork,\ 44 $(call cc-option,-marm,)\ 45 $(call cc-option,-mno-thumb-interwork,)\ 46 ) 47else 48PF_CPPFLAGS_ARM := $(call cc-option,-marm,) \ 49 $(call cc-option,-mno-thumb-interwork,) 50endif 51 52# Only test once 53ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y) 54archprepare: checkthumb checkgcc6 55 56checkthumb: 57 @if test "$(call cc-name)" = "gcc" -a \ 58 "$(call cc-version)" -lt "0404"; then \ 59 echo -n '*** Your GCC does not produce working '; \ 60 echo 'binaries in THUMB mode.'; \ 61 echo '*** Your board is configured for THUMB mode.'; \ 62 false; \ 63 fi 64else 65archprepare: checkgcc6 66endif 67 68checkgcc6: 69 @if test "$(call cc-name)" = "gcc" -a \ 70 "$(call cc-version)" -lt "0600"; then \ 71 echo -n '*** Your GCC is older than 6.0 and will not be '; \ 72 echo 'supported starting in v2018.01.'; \ 73 fi 74 75 76# Try if EABI is supported, else fall back to old API, 77# i. e. for example: 78# - with ELDK 4.2 (EABI supported), use: 79# -mabi=aapcs-linux 80# - with ELDK 4.1 (gcc 4.x, no EABI), use: 81# -mabi=apcs-gnu 82# - with ELDK 3.1 (gcc 3.x), use: 83# -mapcs-32 84PF_CPPFLAGS_ABI := $(call cc-option,\ 85 -mabi=aapcs-linux,\ 86 $(call cc-option,\ 87 -mapcs-32,\ 88 $(call cc-option,\ 89 -mabi=apcs-gnu,\ 90 )\ 91 )\ 92 ) 93PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_ARM) $(PF_CPPFLAGS_ABI) 94 95# For EABI, make sure to provide raise() 96ifneq (,$(findstring -mabi=aapcs-linux,$(PLATFORM_CPPFLAGS))) 97# This file is parsed many times, so the string may get added multiple 98# times. Also, the prefix needs to be different based on whether 99# CONFIG_SPL_BUILD is defined or not. 'filter-out' the existing entry 100# before adding the correct one. 101PLATFORM_LIBS := arch/arm/lib/eabi_compat.o \ 102 $(filter-out arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS)) 103endif 104 105# needed for relocation 106LDFLAGS_u-boot += -pie 107 108# 109# FIXME: binutils versions < 2.22 have a bug in the assembler where 110# branches to weak symbols can be incorrectly optimized in thumb mode 111# to a short branch (b.n instruction) that won't reach when the symbol 112# gets preempted 113# 114# http://sourceware.org/bugzilla/show_bug.cgi?id=12532 115# 116ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y) 117ifeq ($(GAS_BUG_12532),) 118export GAS_BUG_12532:=$(shell if [ $(call binutils-version) -lt 0222 ] ; \ 119 then echo y; else echo n; fi) 120endif 121ifeq ($(GAS_BUG_12532),y) 122PLATFORM_RELFLAGS += -fno-optimize-sibling-calls 123endif 124endif 125 126ifneq ($(CONFIG_SPL_BUILD),y) 127# Check that only R_ARM_RELATIVE relocations are generated. 128ALL-y += checkarmreloc 129# The movt / movw can hardcode 16 bit parts of the addresses in the 130# instruction. Relocation is not supported for that case, so disable 131# such usage by requiring word relocations. 132PLATFORM_CPPFLAGS += $(call cc-option, -mword-relocations) 133PLATFORM_CPPFLAGS += $(call cc-option, -fno-pic) 134endif 135 136# limit ourselves to the sections we want in the .bin. 137ifdef CONFIG_ARM64 138OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .data \ 139 -j .u_boot_list -j .rela.dyn -j .got -j .got.plt 140else 141OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .hash \ 142 -j .data -j .got -j .got.plt -j .u_boot_list -j .rel.dyn 143endif 144 145# if a dtb section exists we always have to include it 146# there are only two cases where it is generated 147# 1) OF_EMBEDED is turned on 148# 2) unit tests include device tree blobs 149OBJCOPYFLAGS += -j .dtb.init.rodata 150 151ifdef CONFIG_EFI_LOADER 152OBJCOPYFLAGS += -j .efi_runtime -j .efi_runtime_rel 153endif 154 155ifneq ($(CONFIG_IMX_CONFIG),) 156ifdef CONFIG_SPL 157ifndef CONFIG_SPL_BUILD 158ALL-y += SPL 159endif 160else 161ifeq ($(CONFIG_OF_SEPARATE),y) 162ALL-y += u-boot-dtb.imx 163else 164ALL-y += u-boot.imx 165endif 166endif 167ifneq ($(CONFIG_VF610),) 168ALL-y += u-boot.vyb 169endif 170endif 171 172EFI_LDS := elf_arm_efi.lds 173EFI_CRT0 := crt0_arm_efi.o 174EFI_RELOC := reloc_arm_efi.o 175