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 += -D__ARM__ 26 27# Choose between ARM/Thumb instruction sets 28ifeq ($(CONFIG_SYS_THUMB_BUILD),y) 29AFLAGS_IMPLICIT_IT := $(call as-option,-Wa$(comma)-mimplicit-it=always) 30PF_CPPFLAGS_ARM := $(AFLAGS_IMPLICIT_IT) \ 31 $(call cc-option, -mthumb -mthumb-interwork,\ 32 $(call cc-option,-marm,)\ 33 $(call cc-option,-mno-thumb-interwork,)\ 34 ) 35else 36PF_CPPFLAGS_ARM := $(call cc-option,-marm,) \ 37 $(call cc-option,-mno-thumb-interwork,) 38endif 39 40# Only test once 41ifneq ($(CONFIG_SPL_BUILD),y) 42ifeq ($(CONFIG_SYS_THUMB_BUILD),y) 43archprepare: checkthumb 44 45checkthumb: 46 @if test "$(call cc-version)" -lt "0404"; then \ 47 echo -n '*** Your GCC does not produce working '; \ 48 echo 'binaries in THUMB mode.'; \ 49 echo '*** Your board is configured for THUMB mode.'; \ 50 false; \ 51 fi 52endif 53endif 54 55# Try if EABI is supported, else fall back to old API, 56# i. e. for example: 57# - with ELDK 4.2 (EABI supported), use: 58# -mabi=aapcs-linux 59# - with ELDK 4.1 (gcc 4.x, no EABI), use: 60# -mabi=apcs-gnu 61# - with ELDK 3.1 (gcc 3.x), use: 62# -mapcs-32 63PF_CPPFLAGS_ABI := $(call cc-option,\ 64 -mabi=aapcs-linux,\ 65 $(call cc-option,\ 66 -mapcs-32,\ 67 $(call cc-option,\ 68 -mabi=apcs-gnu,\ 69 )\ 70 )\ 71 ) 72PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_ARM) $(PF_CPPFLAGS_ABI) 73 74# For EABI, make sure to provide raise() 75ifneq (,$(findstring -mabi=aapcs-linux,$(PLATFORM_CPPFLAGS))) 76# This file is parsed many times, so the string may get added multiple 77# times. Also, the prefix needs to be different based on whether 78# CONFIG_SPL_BUILD is defined or not. 'filter-out' the existing entry 79# before adding the correct one. 80PLATFORM_LIBS := arch/arm/lib/eabi_compat.o \ 81 $(filter-out arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS)) 82endif 83 84# needed for relocation 85LDFLAGS_u-boot += -pie 86 87# 88# FIXME: binutils versions < 2.22 have a bug in the assembler where 89# branches to weak symbols can be incorrectly optimized in thumb mode 90# to a short branch (b.n instruction) that won't reach when the symbol 91# gets preempted 92# 93# http://sourceware.org/bugzilla/show_bug.cgi?id=12532 94# 95ifeq ($(CONFIG_SYS_THUMB_BUILD),y) 96ifeq ($(GAS_BUG_12532),) 97export GAS_BUG_12532:=$(shell if [ $(call binutils-version) -lt 0222 ] ; \ 98 then echo y; else echo n; fi) 99endif 100ifeq ($(GAS_BUG_12532),y) 101PLATFORM_RELFLAGS += -fno-optimize-sibling-calls 102endif 103endif 104 105ifneq ($(CONFIG_SPL_BUILD),y) 106# Check that only R_ARM_RELATIVE relocations are generated. 107ALL-y += checkarmreloc 108# The movt / movw can hardcode 16 bit parts of the addresses in the 109# instruction. Relocation is not supported for that case, so disable 110# such usage by requiring word relocations. 111PLATFORM_CPPFLAGS += $(call cc-option, -mword-relocations) 112endif 113 114# limit ourselves to the sections we want in the .bin. 115ifdef CONFIG_ARM64 116OBJCOPYFLAGS += -j .text -j .rodata -j .data -j .u_boot_list -j .rela.dyn 117else 118OBJCOPYFLAGS += -j .text -j .secure_text -j .rodata -j .hash -j .data -j .got.plt -j .u_boot_list -j .rel.dyn 119endif 120 121ifdef CONFIG_OF_EMBED 122OBJCOPYFLAGS += -j .dtb.init.rodata 123endif 124 125ifneq ($(CONFIG_IMX_CONFIG),) 126ifdef CONFIG_SPL 127ifndef CONFIG_SPL_BUILD 128ALL-y += SPL 129endif 130else 131ifeq ($(CONFIG_OF_SEPARATE),y) 132ALL-y += u-boot-dtb.imx 133else 134ALL-y += u-boot.imx 135endif 136endif 137endif 138