diff options
Diffstat (limited to 'arch/arm/config.mk')
| -rw-r--r-- | arch/arm/config.mk | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/arch/arm/config.mk b/arch/arm/config.mk new file mode 100644 index 0000000..e80e1ed --- /dev/null +++ b/arch/arm/config.mk @@ -0,0 +1,116 @@ +# +# (C) Copyright 2000-2002 +# Wolfgang Denk, DENX Software Engineering, wd@denx.de. +# +# See file CREDITS for list of people who contributed to this +# project. +# +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License as +# published by the Free Software Foundation; either version 2 of +# the License, or (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, Inc., 59 Temple Place, Suite 330, Boston, +# MA 02111-1307 USA +# + +CROSS_COMPILE ?= arm-linux- + +ifndef CONFIG_STANDALONE_LOAD_ADDR +ifneq ($(CONFIG_AM33XX)$(CONFIG_OMAP34XX)$(CONFIG_OMAP44XX)$(CONFIG_OMAP54XX)$(CONFIG_TI814X),) +CONFIG_STANDALONE_LOAD_ADDR = 0x80300000 +else +CONFIG_STANDALONE_LOAD_ADDR = 0xc100000 +endif +endif + +LDFLAGS_FINAL += --gc-sections +PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections + +# Support generic board on ARM +__HAVE_ARCH_GENERIC_BOARD := y + +PLATFORM_CPPFLAGS += -DCONFIG_ARM -D__ARM__ + +# Choose between ARM/Thumb instruction sets +ifeq ($(CONFIG_SYS_THUMB_BUILD),y) +PF_CPPFLAGS_ARM := $(call cc-option, -mthumb -mthumb-interwork,\ + $(call cc-option,-marm,)\ + $(call cc-option,-mno-thumb-interwork,)\ + ) +else +PF_CPPFLAGS_ARM := $(call cc-option,-marm,) \ + $(call cc-option,-mno-thumb-interwork,) +endif + +# Only test once +ifneq ($(CONFIG_SPL_BUILD),y) +ALL-$(CONFIG_SYS_THUMB_BUILD) += checkthumb +endif + +# Try if EABI is supported, else fall back to old API, +# i. e. for example: +# - with ELDK 4.2 (EABI supported), use: +# -mabi=aapcs-linux +# - with ELDK 4.1 (gcc 4.x, no EABI), use: +# -mabi=apcs-gnu +# - with ELDK 3.1 (gcc 3.x), use: +# -mapcs-32 +PF_CPPFLAGS_ABI := $(call cc-option,\ + -mabi=aapcs-linux,\ + $(call cc-option,\ + -mapcs-32,\ + $(call cc-option,\ + -mabi=apcs-gnu,\ + )\ + )\ + ) +PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_ARM) $(PF_CPPFLAGS_ABI) + +# For EABI, make sure to provide raise() +ifneq (,$(findstring -mabi=aapcs-linux,$(PLATFORM_CPPFLAGS))) +# This file is parsed many times, so the string may get added multiple +# times. Also, the prefix needs to be different based on whether +# CONFIG_SPL_BUILD is defined or not. 'filter-out' the existing entry +# before adding the correct one. +ifdef CONFIG_SPL_BUILD +PLATFORM_LIBS := $(SPLTREE)/arch/arm/lib/eabi_compat.o \ + $(filter-out %/arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS)) +else +PLATFORM_LIBS := $(OBJTREE)/arch/arm/lib/eabi_compat.o \ + $(filter-out %/arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS)) +endif +endif + +# needed for relocation +LDFLAGS_u-boot += -pie + +# +# FIXME: binutils versions < 2.22 have a bug in the assembler where +# branches to weak symbols can be incorrectly optimized in thumb mode +# to a short branch (b.n instruction) that won't reach when the symbol +# gets preempted +# +# http://sourceware.org/bugzilla/show_bug.cgi?id=12532 +# +ifeq ($(CONFIG_SYS_THUMB_BUILD),y) +ifeq ($(GAS_BUG_12532),) +export GAS_BUG_12532:=$(shell if [ $(call binutils-version) -lt 0222 ] ; \ + then echo y; else echo n; fi) +endif +ifeq ($(GAS_BUG_12532),y) +PLATFORM_RELFLAGS += -fno-optimize-sibling-calls +endif +endif + +# check that only R_ARM_RELATIVE relocations are generated +ifneq ($(CONFIG_SPL_BUILD),y) +ALL-y += checkarmreloc +endif |
