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