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wdenk39f0e5f2002-08-14 20:30:46 +00001#
2# (C) Copyright 2000-2002
3# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4#
Wolfgang Denk1a459662013-07-08 09:37:19 +02005# SPDX-License-Identifier: GPL-2.0+
wdenk39f0e5f2002-08-14 20:30:46 +00006#
7
Mike Frysinger1ea6bcd2009-06-14 23:33:14 -04008CROSS_COMPILE ?= arm-linux-
9
Wolfgang Denk8ae86b72011-02-04 14:25:17 +010010ifndef CONFIG_STANDALONE_LOAD_ADDR
Lokesh Vutla806d2792013-07-30 11:36:30 +053011ifneq ($(CONFIG_OMAP_COMMON),)
Wolfgang Denk8ae86b72011-02-04 14:25:17 +010012CONFIG_STANDALONE_LOAD_ADDR = 0x80300000
Mike Frysinger262ae0a2009-09-03 23:12:47 -040013else
Wolfgang Denk8ae86b72011-02-04 14:25:17 +010014CONFIG_STANDALONE_LOAD_ADDR = 0xc100000
Mike Frysinger262ae0a2009-09-03 23:12:47 -040015endif
16endif
17
Tom Rinifd725692013-04-25 07:40:22 +000018LDFLAGS_FINAL += --gc-sections
Masahiro Yamada31022742013-09-07 17:42:37 +090019PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections \
Jeroen Hofsteefe1378a2013-09-21 14:04:41 +020020 -fno-common -ffixed-r9 -msoft-float
Tom Rinifd725692013-04-25 07:40:22 +000021
Simon Glass959daa22013-03-11 06:49:57 +000022# Support generic board on ARM
23__HAVE_ARCH_GENERIC_BOARD := y
24
wdenk39f0e5f2002-08-14 20:30:46 +000025PLATFORM_CPPFLAGS += -DCONFIG_ARM -D__ARM__
Jean-Christophe PLAGNIOL-VILLARD10a451c2009-05-08 20:24:12 +020026
Aneesh V5356f542012-03-08 07:20:19 +000027# Choose between ARM/Thumb instruction sets
28ifeq ($(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 $(call cc-option,-mno-thumb-interwork,)
36endif
Wolfgang Denkf772acf2009-08-17 13:17:29 +020037
Tom Rini06a119a2012-03-16 06:34:35 +000038# Only test once
39ifneq ($(CONFIG_SPL_BUILD),y)
40ALL-$(CONFIG_SYS_THUMB_BUILD) += checkthumb
41endif
42
Wolfgang Denkf772acf2009-08-17 13:17:29 +020043# Try if EABI is supported, else fall back to old API,
44# i. e. for example:
45# - with ELDK 4.2 (EABI supported), use:
Aneesh V5356f542012-03-08 07:20:19 +000046# -mabi=aapcs-linux
Wolfgang Denkf772acf2009-08-17 13:17:29 +020047# - with ELDK 4.1 (gcc 4.x, no EABI), use:
Aneesh V5356f542012-03-08 07:20:19 +000048# -mabi=apcs-gnu
Wolfgang Denkf772acf2009-08-17 13:17:29 +020049# - with ELDK 3.1 (gcc 3.x), use:
Aneesh V5356f542012-03-08 07:20:19 +000050# -mapcs-32
Wolfgang Denkcca4e4a2011-11-01 20:54:02 +000051PF_CPPFLAGS_ABI := $(call cc-option,\
Aneesh V5356f542012-03-08 07:20:19 +000052 -mabi=aapcs-linux,\
Wolfgang Denkcca4e4a2011-11-01 20:54:02 +000053 $(call cc-option,\
54 -mapcs-32,\
Wolfgang Denkf772acf2009-08-17 13:17:29 +020055 $(call cc-option,\
Wolfgang Denkcca4e4a2011-11-01 20:54:02 +000056 -mabi=apcs-gnu,\
57 )\
Aneesh V5356f542012-03-08 07:20:19 +000058 )\
Wolfgang Denkcca4e4a2011-11-01 20:54:02 +000059 )
60PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_ARM) $(PF_CPPFLAGS_ABI)
Wolfgang Denkf772acf2009-08-17 13:17:29 +020061
62# For EABI, make sure to provide raise()
63ifneq (,$(findstring -mabi=aapcs-linux,$(PLATFORM_CPPFLAGS)))
Aneesh V52534182011-07-19 05:51:41 +000064# This file is parsed many times, so the string may get added multiple
65# times. Also, the prefix needs to be different based on whether
66# CONFIG_SPL_BUILD is defined or not. 'filter-out' the existing entry
67# before adding the correct one.
68ifdef CONFIG_SPL_BUILD
69PLATFORM_LIBS := $(SPLTREE)/arch/arm/lib/eabi_compat.o \
70 $(filter-out %/arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS))
71else
72PLATFORM_LIBS := $(OBJTREE)/arch/arm/lib/eabi_compat.o \
73 $(filter-out %/arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS))
Wolfgang Denkf772acf2009-08-17 13:17:29 +020074endif
75endif
Albert Aribaud92d5ecb2010-10-11 13:13:28 +020076
Albert Aribaud92d5ecb2010-10-11 13:13:28 +020077# needed for relocation
Stefano Babica4594e42011-01-27 06:03:49 +000078LDFLAGS_u-boot += -pie
Allen Martin0f20bb62012-07-18 13:45:53 +000079
80#
81# FIXME: binutils versions < 2.22 have a bug in the assembler where
82# branches to weak symbols can be incorrectly optimized in thumb mode
83# to a short branch (b.n instruction) that won't reach when the symbol
84# gets preempted
85#
86# http://sourceware.org/bugzilla/show_bug.cgi?id=12532
87#
88ifeq ($(CONFIG_SYS_THUMB_BUILD),y)
89ifeq ($(GAS_BUG_12532),)
90export GAS_BUG_12532:=$(shell if [ $(call binutils-version) -lt 0222 ] ; \
91 then echo y; else echo n; fi)
92endif
93ifeq ($(GAS_BUG_12532),y)
94PLATFORM_RELFLAGS += -fno-optimize-sibling-calls
95endif
96endif
Albert ARIBAUDc37980c2013-06-11 14:17:30 +020097
Albert ARIBAUDc37980c2013-06-11 14:17:30 +020098ifneq ($(CONFIG_SPL_BUILD),y)
Jeroen Hofstee373d7982013-08-24 13:55:38 +020099# Check that only R_ARM_RELATIVE relocations are generated.
100ALL-y += checkarmreloc
101# The movt / movw can hardcode 16 bit parts of the addresses in the
102# instruction. Relocation is not supported for that case, so disable
103# such usage by requiring word relocations.
104PLATFORM_CPPFLAGS += $(call cc-option, -mword-relocations)
Albert ARIBAUDc37980c2013-06-11 14:17:30 +0200105endif