1 # SPDX-License-Identifier: GPL-2.0+
3 # (C) Copyright 2000-2002
4 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
6 ifndef CONFIG_STANDALONE_LOAD_ADDR
7 ifneq ($(CONFIG_ARCH_OMAP2PLUS),)
8 CONFIG_STANDALONE_LOAD_ADDR = 0x80300000
10 CONFIG_STANDALONE_LOAD_ADDR = 0xc100000
14 CFLAGS_NON_EFI := -fno-pic -ffixed-r9 -ffunction-sections -fdata-sections \
15 -fstack-protector-strong
16 CFLAGS_EFI := -fpic -fshort-wchar
18 ifneq ($(LTO_ENABLE)$(CONFIG_USE_PRIVATE_LIBGCC),yy)
19 LDFLAGS_FINAL += --gc-sections
22 ifneq ($(LTO_ENABLE),y)
23 PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections
26 PLATFORM_RELFLAGS += -fno-common -ffixed-r9
27 PLATFORM_RELFLAGS += $(call cc-option, -msoft-float) \
28 $(call cc-option,-mgeneral-regs-only) \
29 $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
32 LLVM_RELFLAGS := $(call cc-option,-mllvm,) \
33 $(call cc-option,-mno-movt,)
34 PLATFORM_RELFLAGS += $(LLVM_RELFLAGS)
36 PLATFORM_CPPFLAGS += -D__ARM__
39 PLATFORM_ELFFLAGS += -B aarch64 -O elf64-littleaarch64
41 PLATFORM_ELFFLAGS += -B arm -O elf32-littlearm
44 # Choose between ARM/Thumb instruction sets
45 ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y)
46 AFLAGS_IMPLICIT_IT := $(call as-option,-Wa$(comma)-mimplicit-it=always)
47 PF_CPPFLAGS_ARM := $(AFLAGS_IMPLICIT_IT) \
48 $(call cc-option, -mthumb -mthumb-interwork,\
49 $(call cc-option,-marm,)\
50 $(call cc-option,-mno-thumb-interwork,)\
53 PF_CPPFLAGS_ARM := $(call cc-option,-marm,) \
54 $(call cc-option,-mno-thumb-interwork,)
58 ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y)
59 archprepare: checkthumb checkgcc6
62 @if test "$(call cc-name)" = "gcc" -a \
63 "$(call cc-version)" -lt "0404"; then \
64 echo -n '*** Your GCC does not produce working '; \
65 echo 'binaries in THUMB mode.'; \
66 echo '*** Your board is configured for THUMB mode.'; \
70 archprepare: checkgcc6
74 @if test "$(call cc-name)" = "gcc" -a \
75 "$(call cc-version)" -lt "0600"; then \
76 echo '*** Your GCC is older than 6.0 and is not supported'; \
81 # Try if EABI is supported, else fall back to old API,
83 # - with ELDK 4.2 (EABI supported), use:
85 # - with ELDK 4.1 (gcc 4.x, no EABI), use:
87 # - with ELDK 3.1 (gcc 3.x), use:
89 PF_CPPFLAGS_ABI := $(call cc-option,\
98 PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_ARM) $(PF_CPPFLAGS_ABI)
100 # For EABI, make sure to provide raise()
101 ifneq (,$(findstring -mabi=aapcs-linux,$(PLATFORM_CPPFLAGS)))
102 # This file is parsed many times, so the string may get added multiple
103 # times. Also, the prefix needs to be different based on whether
104 # CONFIG_SPL_BUILD is defined or not. 'filter-out' the existing entry
105 # before adding the correct one.
106 PLATFORM_LIBS := arch/arm/lib/eabi_compat.o \
107 $(filter-out arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS))
110 # needed for relocation
111 LDFLAGS_u-boot += -pie
114 # FIXME: binutils versions < 2.22 have a bug in the assembler where
115 # branches to weak symbols can be incorrectly optimized in thumb mode
116 # to a short branch (b.n instruction) that won't reach when the symbol
119 # http://sourceware.org/bugzilla/show_bug.cgi?id=12532
121 ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y)
122 ifeq ($(GAS_BUG_12532),)
123 export GAS_BUG_12532:=$(shell if [ $(call binutils-version) -lt 0222 ] ; \
124 then echo y; else echo n; fi)
126 ifeq ($(GAS_BUG_12532),y)
127 PLATFORM_RELFLAGS += -fno-optimize-sibling-calls
131 ifneq ($(CONFIG_SPL_BUILD),y)
132 # Check that only R_ARM_RELATIVE relocations are generated.
133 INPUTS-y += checkarmreloc
134 # The movt / movw can hardcode 16 bit parts of the addresses in the
135 # instruction. Relocation is not supported for that case, so disable
136 # such usage by requiring word relocations.
137 PLATFORM_CPPFLAGS += $(call cc-option, -mword-relocations)
138 PLATFORM_CPPFLAGS += $(call cc-option, -fno-pic)
141 # limit ourselves to the sections we want in the .bin.
143 OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .data \
144 -j __u_boot_list -j .rela.dyn -j .got -j .got.plt \
145 -j .binman_sym_table -j .text_rest
147 OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .hash \
148 -j .data -j .got -j .got.plt -j __u_boot_list -j .rel.dyn \
149 -j .binman_sym_table -j .text_rest
152 # if a dtb section exists we always have to include it
153 # there are only two cases where it is generated
154 # 1) OF_EMBEDED is turned on
155 # 2) unit tests include device tree blobs
156 OBJCOPYFLAGS += -j .dtb.init.rodata
158 ifdef CONFIG_EFI_LOADER
159 OBJCOPYFLAGS += -j .efi_runtime -j .efi_runtime_rel
162 ifdef CONFIG_MACH_IMX
163 ifneq ($(CONFIG_IMX_CONFIG),"")
165 ifndef CONFIG_SPL_BUILD
169 ifeq ($(CONFIG_OF_SEPARATE),y)
170 INPUTS-y += u-boot-dtb.imx
172 INPUTS-y += u-boot.imx
175 ifneq ($(CONFIG_VF610),)
176 INPUTS-y += u-boot.vyb
181 EFI_LDS := elf_arm_efi.lds
182 EFI_CRT0 := crt0_arm_efi.o
183 EFI_RELOC := reloc_arm_efi.o