arch/arm/config.mk

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