2 # (C) Copyright 2000-2002
3 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 # SPDX-License-Identifier: GPL-2.0+
8 CROSS_COMPILE ?= arm-linux-
10 ifndef CONFIG_STANDALONE_LOAD_ADDR
11 ifneq ($(CONFIG_OMAP_COMMON),)
12 CONFIG_STANDALONE_LOAD_ADDR = 0x80300000
14 CONFIG_STANDALONE_LOAD_ADDR = 0xc100000
18 LDFLAGS_FINAL += --gc-sections
19 PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections \
20 -fno-common -ffixed-r9 -msoft-float
22 # Support generic board on ARM
23 __HAVE_ARCH_GENERIC_BOARD := y
25 PLATFORM_CPPFLAGS += -DCONFIG_ARM -D__ARM__
27 # Choose between ARM/Thumb instruction sets
28 ifeq ($(CONFIG_SYS_THUMB_BUILD),y)
29 PF_CPPFLAGS_ARM := $(call cc-option, -mthumb -mthumb-interwork,\
30 $(call cc-option,-marm,)\
31 $(call cc-option,-mno-thumb-interwork,)\
34 PF_CPPFLAGS_ARM := $(call cc-option,-marm,) \
35 $(call cc-option,-mno-thumb-interwork,)
39 ifneq ($(CONFIG_SPL_BUILD),y)
40 ALL-$(CONFIG_SYS_THUMB_BUILD) += checkthumb
43 # Try if EABI is supported, else fall back to old API,
45 # - with ELDK 4.2 (EABI supported), use:
47 # - with ELDK 4.1 (gcc 4.x, no EABI), use:
49 # - with ELDK 3.1 (gcc 3.x), use:
51 PF_CPPFLAGS_ABI := $(call cc-option,\
60 PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_ARM) $(PF_CPPFLAGS_ABI)
62 # For EABI, make sure to provide raise()
63 ifneq (,$(findstring -mabi=aapcs-linux,$(PLATFORM_CPPFLAGS)))
64 # 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.
68 ifdef CONFIG_SPL_BUILD
69 PLATFORM_LIBS := $(SPLTREE)/arch/arm/lib/eabi_compat.o \
70 $(filter-out %/arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS))
72 PLATFORM_LIBS := $(OBJTREE)/arch/arm/lib/eabi_compat.o \
73 $(filter-out %/arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS))
77 # needed for relocation
78 LDFLAGS_u-boot += -pie
81 # FIXME: binutils versions < 2.22 have a bug in the assembler where
82 # branches to weak symbols can be incorrectly optimized in thumb mode
83 # to a short branch (b.n instruction) that won't reach when the symbol
86 # http://sourceware.org/bugzilla/show_bug.cgi?id=12532
88 ifeq ($(CONFIG_SYS_THUMB_BUILD),y)
89 ifeq ($(GAS_BUG_12532),)
90 export GAS_BUG_12532:=$(shell if [ $(call binutils-version) -lt 0222 ] ; \
91 then echo y; else echo n; fi)
93 ifeq ($(GAS_BUG_12532),y)
94 PLATFORM_RELFLAGS += -fno-optimize-sibling-calls
98 ifneq ($(CONFIG_SPL_BUILD),y)
99 # Check that only R_ARM_RELATIVE relocations are generated.
100 ALL-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.
104 PLATFORM_CPPFLAGS += $(call cc-option, -mword-relocations)