1# 2# (C) Copyright 2000-2002 3# Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4# 5# See file CREDITS for list of people who contributed to this 6# project. 7# 8# This program is free software; you can redistribute it and/or 9# modify it under the terms of the GNU General Public License as 10# published by the Free Software Foundation; either version 2 of 11# the License, or (at your option) any later version. 12# 13# This program is distributed in the hope that it will be useful, 14# but WITHOUT ANY WARRANTY; without even the implied warranty of 15# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16# GNU General Public License for more details. 17# 18# You should have received a copy of the GNU General Public License 19# along with this program; if not, write to the Free Software 20# Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21# MA 02111-1307 USA 22# 23 24CROSS_COMPILE ?= arm-linux- 25 26ifndef CONFIG_STANDALONE_LOAD_ADDR 27ifneq ($(CONFIG_AM33XX)$(CONFIG_OMAP34XX)$(CONFIG_OMAP44XX)$(CONFIG_OMAP54XX)$(CONFIG_TI814X),) 28CONFIG_STANDALONE_LOAD_ADDR = 0x80300000 29else 30CONFIG_STANDALONE_LOAD_ADDR = 0xc100000 31endif 32endif 33 34LDFLAGS_FINAL += --gc-sections 35PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections 36 37# Support generic board on ARM 38__HAVE_ARCH_GENERIC_BOARD := y 39 40PLATFORM_CPPFLAGS += -DCONFIG_ARM -D__ARM__ 41 42# Choose between ARM/Thumb instruction sets 43ifeq ($(CONFIG_SYS_THUMB_BUILD),y) 44PF_CPPFLAGS_ARM := $(call cc-option, -mthumb -mthumb-interwork,\ 45 $(call cc-option,-marm,)\ 46 $(call cc-option,-mno-thumb-interwork,)\ 47 ) 48else 49PF_CPPFLAGS_ARM := $(call cc-option,-marm,) \ 50 $(call cc-option,-mno-thumb-interwork,) 51endif 52 53# Only test once 54ifneq ($(CONFIG_SPL_BUILD),y) 55ALL-$(CONFIG_SYS_THUMB_BUILD) += checkthumb 56endif 57 58# Try if EABI is supported, else fall back to old API, 59# i. e. for example: 60# - with ELDK 4.2 (EABI supported), use: 61# -mabi=aapcs-linux 62# - with ELDK 4.1 (gcc 4.x, no EABI), use: 63# -mabi=apcs-gnu 64# - with ELDK 3.1 (gcc 3.x), use: 65# -mapcs-32 66PF_CPPFLAGS_ABI := $(call cc-option,\ 67 -mabi=aapcs-linux,\ 68 $(call cc-option,\ 69 -mapcs-32,\ 70 $(call cc-option,\ 71 -mabi=apcs-gnu,\ 72 )\ 73 )\ 74 ) 75PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_ARM) $(PF_CPPFLAGS_ABI) 76 77# For EABI, make sure to provide raise() 78ifneq (,$(findstring -mabi=aapcs-linux,$(PLATFORM_CPPFLAGS))) 79# This file is parsed many times, so the string may get added multiple 80# times. Also, the prefix needs to be different based on whether 81# CONFIG_SPL_BUILD is defined or not. 'filter-out' the existing entry 82# before adding the correct one. 83ifdef CONFIG_SPL_BUILD 84PLATFORM_LIBS := $(SPLTREE)/arch/arm/lib/eabi_compat.o \ 85 $(filter-out %/arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS)) 86else 87PLATFORM_LIBS := $(OBJTREE)/arch/arm/lib/eabi_compat.o \ 88 $(filter-out %/arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS)) 89endif 90endif 91 92# needed for relocation 93LDFLAGS_u-boot += -pie 94 95# 96# FIXME: binutils versions < 2.22 have a bug in the assembler where 97# branches to weak symbols can be incorrectly optimized in thumb mode 98# to a short branch (b.n instruction) that won't reach when the symbol 99# gets preempted 100# 101# http://sourceware.org/bugzilla/show_bug.cgi?id=12532 102# 103ifeq ($(CONFIG_SYS_THUMB_BUILD),y) 104ifeq ($(GAS_BUG_12532),) 105export GAS_BUG_12532:=$(shell if [ $(call binutils-version) -lt 0222 ] ; \ 106 then echo y; else echo n; fi) 107endif 108ifeq ($(GAS_BUG_12532),y) 109PLATFORM_RELFLAGS += -fno-optimize-sibling-calls 110endif 111endif 112 113# check that only R_ARM_RELATIVE relocations are generated 114ifneq ($(CONFIG_SPL_BUILD),y) 115ALL-y += checkarmreloc 116endif 117