arch/arm/config.mk

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