arch/arm/config.mk

   1 # SPDX-License-Identifier: GPL-2.0+
   2 #
   3 # (C) Copyright 2000-2002
   4 # Wolfgang Denk, DENX Software Engineering, [email protected].
   5
   6 ifndef CONFIG_STANDALONE_LOAD_ADDR
   7 ifneq ($(CONFIG_ARCH_OMAP2PLUS),)
   8 CONFIG_STANDALONE_LOAD_ADDR = 0x80300000
   9 else
  10 CONFIG_STANDALONE_LOAD_ADDR = 0xc100000
  11 endif
  12 endif
  13
  14 CFLAGS_NON_EFI := -fno-pic -ffixed-r9 -ffunction-sections -fdata-sections \
  15                   -fstack-protector-strong
  16 CFLAGS_EFI := -fpic -fshort-wchar
  17
  18 LDFLAGS_FINAL += --gc-sections
  19 PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections \
  20                      -fno-common -ffixed-r9
  21 PLATFORM_RELFLAGS += $(call cc-option, -msoft-float) \
  22       $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
  23
  24 # LLVM support
  25 LLVM_RELFLAGS           := $(call cc-option,-mllvm,) \
  26                         $(call cc-option,-mno-movt,)
  27 PLATFORM_RELFLAGS       += $(LLVM_RELFLAGS)
  28
  29 PLATFORM_CPPFLAGS += -D__ARM__
  30
  31 ifdef CONFIG_ARM64
  32 PLATFORM_ELFFLAGS += -B aarch64 -O elf64-littleaarch64
  33 else
  34 PLATFORM_ELFFLAGS += -B arm -O elf32-littlearm
  35 endif
  36
  37 # Choose between ARM/Thumb instruction sets
  38 ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y)
  39 AFLAGS_IMPLICIT_IT      := $(call as-option,-Wa$(comma)-mimplicit-it=always)
  40 PF_CPPFLAGS_ARM         := $(AFLAGS_IMPLICIT_IT) \
  41                         $(call cc-option, -mthumb -mthumb-interwork,\
  42                         $(call cc-option,-marm,)\
  43                         $(call cc-option,-mno-thumb-interwork,)\
  44                 )
  45 else
  46 PF_CPPFLAGS_ARM := $(call cc-option,-marm,) \
  47                 $(call cc-option,-mno-thumb-interwork,)
  48 endif
  49
  50 # Only test once
  51 ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y)
  52 archprepare: checkthumb checkgcc6
  53
  54 checkthumb:
  55         @if test "$(call cc-name)" = "gcc" -a \
  56                         "$(call cc-version)" -lt "0404"; then \
  57                 echo -n '*** Your GCC does not produce working '; \
  58                 echo 'binaries in THUMB mode.'; \
  59                 echo '*** Your board is configured for THUMB mode.'; \
  60                 false; \
  61         fi
  62 else
  63 archprepare: checkgcc6
  64 endif
  65
  66 checkgcc6:
  67         @if test "$(call cc-name)" = "gcc" -a \
  68                         "$(call cc-version)" -lt "0600"; then \
  69                 echo '*** Your GCC is older than 6.0 and is not supported'; \
  70                 false; \
  71         fi
  72
  73
  74 # Try if EABI is supported, else fall back to old API,
  75 # i. e. for example:
  76 # - with ELDK 4.2 (EABI supported), use:
  77 #       -mabi=aapcs-linux
  78 # - with ELDK 4.1 (gcc 4.x, no EABI), use:
  79 #       -mabi=apcs-gnu
  80 # - with ELDK 3.1 (gcc 3.x), use:
  81 #       -mapcs-32
  82 PF_CPPFLAGS_ABI := $(call cc-option,\
  83                         -mabi=aapcs-linux,\
  84                         $(call cc-option,\
  85                                 -mapcs-32,\
  86                                 $(call cc-option,\
  87                                         -mabi=apcs-gnu,\
  88                                 )\
  89                         )\
  90                 )
  91 PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_ARM) $(PF_CPPFLAGS_ABI)
  92
  93 # For EABI, make sure to provide raise()
  94 ifneq (,$(findstring -mabi=aapcs-linux,$(PLATFORM_CPPFLAGS)))
  95 # This file is parsed many times, so the string may get added multiple
  96 # times. Also, the prefix needs to be different based on whether
  97 # CONFIG_SPL_BUILD is defined or not. 'filter-out' the existing entry
  98 # before adding the correct one.
  99 PLATFORM_LIBS := arch/arm/lib/eabi_compat.o \
 100         $(filter-out arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS))
 101 endif
 102
 103 # needed for relocation
 104 LDFLAGS_u-boot += -pie
 105
 106 #
 107 # FIXME: binutils versions < 2.22 have a bug in the assembler where
 108 # branches to weak symbols can be incorrectly optimized in thumb mode
 109 # to a short branch (b.n instruction) that won't reach when the symbol
 110 # gets preempted
 111 #
 112 # http://sourceware.org/bugzilla/show_bug.cgi?id=12532
 113 #
 114 ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y)
 115 ifeq ($(GAS_BUG_12532),)
 116 export GAS_BUG_12532:=$(shell if [ $(call binutils-version) -lt 0222 ] ; \
 117         then echo y; else echo n; fi)
 118 endif
 119 ifeq ($(GAS_BUG_12532),y)
 120 PLATFORM_RELFLAGS += -fno-optimize-sibling-calls
 121 endif
 122 endif
 123
 124 ifneq ($(CONFIG_SPL_BUILD),y)
 125 # Check that only R_ARM_RELATIVE relocations are generated.
 126 INPUTS-y += checkarmreloc
 127 # The movt / movw can hardcode 16 bit parts of the addresses in the
 128 # instruction. Relocation is not supported for that case, so disable
 129 # such usage by requiring word relocations.
 130 PLATFORM_CPPFLAGS += $(call cc-option, -mword-relocations)
 131 PLATFORM_CPPFLAGS += $(call cc-option, -fno-pic)
 132 endif
 133
 134 # limit ourselves to the sections we want in the .bin.
 135 ifdef CONFIG_ARM64
 136 OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .data \
 137                 -j .u_boot_list -j .rela.dyn -j .got -j .got.plt \
 138                 -j .binman_sym_table -j .text_rest
 139 else
 140 OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .hash \
 141                 -j .data -j .got -j .got.plt -j .u_boot_list -j .rel.dyn \
 142                 -j .binman_sym_table -j .text_rest
 143 endif
 144
 145 # if a dtb section exists we always have to include it
 146 # there are only two cases where it is generated
 147 # 1) OF_EMBEDED is turned on
 148 # 2) unit tests include device tree blobs
 149 OBJCOPYFLAGS += -j .dtb.init.rodata
 150
 151 ifdef CONFIG_EFI_LOADER
 152 OBJCOPYFLAGS += -j .efi_runtime -j .efi_runtime_rel
 153 endif
 154
 155 ifneq ($(CONFIG_IMX_CONFIG),)
 156 ifdef CONFIG_SPL
 157 ifndef CONFIG_SPL_BUILD
 158 INPUTS-y += SPL
 159 endif
 160 else
 161 ifeq ($(CONFIG_OF_SEPARATE),y)
 162 INPUTS-y += u-boot-dtb.imx
 163 else
 164 INPUTS-y += u-boot.imx
 165 endif
 166 endif
 167 ifneq ($(CONFIG_VF610),)
 168 INPUTS-y += u-boot.vyb
 169 endif
 170 endif
 171
 172 EFI_LDS := elf_arm_efi.lds
 173 EFI_CRT0 := crt0_arm_efi.o
 174 EFI_RELOC := reloc_arm_efi.o