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