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 += $(LLVM_RELFLAGS) 30 31PLATFORM_CPPFLAGS += -D__ARM__ 32 33# Choose between ARM/Thumb instruction sets 34ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y) 35AFLAGS_IMPLICIT_IT := $(call as-option,-Wa$(comma)-mimplicit-it=always) 36PF_CPPFLAGS_ARM := $(AFLAGS_IMPLICIT_IT) \ 37 $(call cc-option, -mthumb -mthumb-interwork,\ 38 $(call cc-option,-marm,)\ 39 $(call cc-option,-mno-thumb-interwork,)\ 40 ) 41else 42PF_CPPFLAGS_ARM := $(call cc-option,-marm,) \ 43 $(call cc-option,-mno-thumb-interwork,) 44endif 45 46# Only test once 47ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y) 48archprepare: checkthumb checkgcc6 49 50checkthumb: 51 @if test "$(call cc-name)" = "gcc" -a \ 52 "$(call cc-version)" -lt "0404"; then \ 53 echo -n '*** Your GCC does not produce working '; \ 54 echo 'binaries in THUMB mode.'; \ 55 echo '*** Your board is configured for THUMB mode.'; \ 56 false; \ 57 fi 58else 59archprepare: checkgcc6 60endif 61 62checkgcc6: 63 @if test "$(call cc-name)" = "gcc" -a \ 64 "$(call cc-version)" -lt "0600"; then \ 65 echo -n '*** Your GCC is older than 6.0 and will not be '; \ 66 echo 'supported starting in v2018.01.'; \ 67 fi 68 69 70# Try if EABI is supported, else fall back to old API, 71# i. e. for example: 72# - with ELDK 4.2 (EABI supported), use: 73# -mabi=aapcs-linux 74# - with ELDK 4.1 (gcc 4.x, no EABI), use: 75# -mabi=apcs-gnu 76# - with ELDK 3.1 (gcc 3.x), use: 77# -mapcs-32 78PF_CPPFLAGS_ABI := $(call cc-option,\ 79 -mabi=aapcs-linux,\ 80 $(call cc-option,\ 81 -mapcs-32,\ 82 $(call cc-option,\ 83 -mabi=apcs-gnu,\ 84 )\ 85 )\ 86 ) 87PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_ARM) $(PF_CPPFLAGS_ABI) 88 89# For EABI, make sure to provide raise() 90ifneq (,$(findstring -mabi=aapcs-linux,$(PLATFORM_CPPFLAGS))) 91# This file is parsed many times, so the string may get added multiple 92# times. Also, the prefix needs to be different based on whether 93# CONFIG_SPL_BUILD is defined or not. 'filter-out' the existing entry 94# before adding the correct one. 95PLATFORM_LIBS := arch/arm/lib/eabi_compat.o \ 96 $(filter-out arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS)) 97endif 98 99# needed for relocation 100LDFLAGS_u-boot += -pie 101 102# 103# FIXME: binutils versions < 2.22 have a bug in the assembler where 104# branches to weak symbols can be incorrectly optimized in thumb mode 105# to a short branch (b.n instruction) that won't reach when the symbol 106# gets preempted 107# 108# http://sourceware.org/bugzilla/show_bug.cgi?id=12532 109# 110ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y) 111ifeq ($(GAS_BUG_12532),) 112export GAS_BUG_12532:=$(shell if [ $(call binutils-version) -lt 0222 ] ; \ 113 then echo y; else echo n; fi) 114endif 115ifeq ($(GAS_BUG_12532),y) 116PLATFORM_RELFLAGS += -fno-optimize-sibling-calls 117endif 118endif 119 120ifneq ($(CONFIG_SPL_BUILD),y) 121# Check that only R_ARM_RELATIVE relocations are generated. 122ALL-y += checkarmreloc 123# The movt / movw can hardcode 16 bit parts of the addresses in the 124# instruction. Relocation is not supported for that case, so disable 125# such usage by requiring word relocations. 126PLATFORM_CPPFLAGS += $(call cc-option, -mword-relocations) 127PLATFORM_CPPFLAGS += $(call cc-option, -fno-pic) 128endif 129 130# limit ourselves to the sections we want in the .bin. 131ifdef CONFIG_ARM64 132OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .data \ 133 -j .u_boot_list -j .rela.dyn -j .got -j .got.plt 134else 135OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .hash \ 136 -j .data -j .got -j .got.plt -j .u_boot_list -j .rel.dyn 137endif 138 139ifdef CONFIG_OF_EMBED 140OBJCOPYFLAGS += -j .dtb.init.rodata 141endif 142 143ifdef CONFIG_EFI_LOADER 144OBJCOPYFLAGS += -j .efi_runtime -j .efi_runtime_rel 145endif 146 147ifneq ($(CONFIG_IMX_CONFIG),) 148ifdef CONFIG_SPL 149ifndef CONFIG_SPL_BUILD 150ALL-y += SPL 151endif 152else 153ifeq ($(CONFIG_OF_SEPARATE),y) 154ALL-y += u-boot-dtb.imx 155else 156ALL-y += u-boot.imx 157endif 158endif 159ifneq ($(CONFIG_VF610),) 160ALL-y += u-boot.vyb 161endif 162endif 163 164EFI_LDS := elf_arm_efi.lds 165EFI_CRT0 := crt0_arm_efi.o 166EFI_RELOC := reloc_arm_efi.o 167