arch/arm/config.mk

   1 #
   2 # (C) Copyright 2000-2002
   3 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   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 LLVMS_RELFLAGS          := $(call cc-option,-mllvm,) \
  27                         $(call cc-option,-target arm-none-eabi,) \
  28                         $(call cc-option,-arm-use-movt=0,)
  29 PLATFORM_RELFLAGS       += $(LLVM_RELFLAGS)
  30
  31 PLATFORM_CPPFLAGS += -D__ARM__
  32
  33 # Choose between ARM/Thumb instruction sets
  34 ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y)
  35 AFLAGS_IMPLICIT_IT      := $(call as-option,-Wa$(comma)-mimplicit-it=always)
  36 PF_CPPFLAGS_ARM         := $(AFLAGS_IMPLICIT_IT) \
  37                         $(call cc-option, -mthumb -mthumb-interwork,\
  38                         $(call cc-option,-marm,)\
  39                         $(call cc-option,-mno-thumb-interwork,)\
  40                 )
  41 else
  42 PF_CPPFLAGS_ARM := $(call cc-option,-marm,) \
  43                 $(call cc-option,-mno-thumb-interwork,)
  44 endif
  45
  46 # Only test once
  47 ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y)
  48 archprepare: checkthumb checkgcc6
  49
  50 checkthumb:
  51         @if test "$(call cc-name)" = "gcc" -a \
  52                         "$(call cc-version)" -lt "0404"; then \
  53                 echo -n '*** Your GCC does not produce working '; \
  54                 echo 'binaries in THUMB mode.'; \
  55                 echo '*** Your board is configured for THUMB mode.'; \
  56                 false; \
  57         fi
  58 else
  59 archprepare: checkgcc6
  60 endif
  61
  62 checkgcc6:
  63         @if test "$(call cc-name)" = "gcc" -a \
  64                         "$(call cc-version)" -lt "0600"; then \
  65                 echo -n '*** Your GCC is older than 6.0 and will not be '; \
  66                 echo 'supported starting in v2018.01.'; \
  67         fi
  68
  69
  70 # Try if EABI is supported, else fall back to old API,
  71 # i. e. for example:
  72 # - with ELDK 4.2 (EABI supported), use:
  73 #       -mabi=aapcs-linux
  74 # - with ELDK 4.1 (gcc 4.x, no EABI), use:
  75 #       -mabi=apcs-gnu
  76 # - with ELDK 3.1 (gcc 3.x), use:
  77 #       -mapcs-32
  78 PF_CPPFLAGS_ABI := $(call cc-option,\
  79                         -mabi=aapcs-linux,\
  80                         $(call cc-option,\
  81                                 -mapcs-32,\
  82                                 $(call cc-option,\
  83                                         -mabi=apcs-gnu,\
  84                                 )\
  85                         )\
  86                 )
  87 PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_ARM) $(PF_CPPFLAGS_ABI)
  88
  89 # For EABI, make sure to provide raise()
  90 ifneq (,$(findstring -mabi=aapcs-linux,$(PLATFORM_CPPFLAGS)))
  91 # This file is parsed many times, so the string may get added multiple
  92 # times. Also, the prefix needs to be different based on whether
  93 # CONFIG_SPL_BUILD is defined or not. 'filter-out' the existing entry
  94 # before adding the correct one.
  95 PLATFORM_LIBS := arch/arm/lib/eabi_compat.o \
  96         $(filter-out arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS))
  97 endif
  98
  99 # needed for relocation
 100 LDFLAGS_u-boot += -pie
 101
 102 #
 103 # FIXME: binutils versions < 2.22 have a bug in the assembler where
 104 # branches to weak symbols can be incorrectly optimized in thumb mode
 105 # to a short branch (b.n instruction) that won't reach when the symbol
 106 # gets preempted
 107 #
 108 # http://sourceware.org/bugzilla/show_bug.cgi?id=12532
 109 #
 110 ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y)
 111 ifeq ($(GAS_BUG_12532),)
 112 export GAS_BUG_12532:=$(shell if [ $(call binutils-version) -lt 0222 ] ; \
 113         then echo y; else echo n; fi)
 114 endif
 115 ifeq ($(GAS_BUG_12532),y)
 116 PLATFORM_RELFLAGS += -fno-optimize-sibling-calls
 117 endif
 118 endif
 119
 120 ifneq ($(CONFIG_SPL_BUILD),y)
 121 # Check that only R_ARM_RELATIVE relocations are generated.
 122 ALL-y += checkarmreloc
 123 # The movt / movw can hardcode 16 bit parts of the addresses in the
 124 # instruction. Relocation is not supported for that case, so disable
 125 # such usage by requiring word relocations.
 126 PLATFORM_CPPFLAGS += $(call cc-option, -mword-relocations)
 127 PLATFORM_CPPFLAGS += $(call cc-option, -fno-pic)
 128 endif
 129
 130 # limit ourselves to the sections we want in the .bin.
 131 ifdef CONFIG_ARM64
 132 OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .data \
 133                 -j .u_boot_list -j .rela.dyn -j .got -j .got.plt
 134 else
 135 OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .hash \
 136                 -j .data -j .got -j .got.plt -j .u_boot_list -j .rel.dyn
 137 endif
 138
 139 ifdef CONFIG_OF_EMBED
 140 OBJCOPYFLAGS += -j .dtb.init.rodata
 141 endif
 142
 143 ifdef CONFIG_EFI_LOADER
 144 OBJCOPYFLAGS += -j .efi_runtime -j .efi_runtime_rel
 145 endif
 146
 147 ifneq ($(CONFIG_IMX_CONFIG),)
 148 ifdef CONFIG_SPL
 149 ifndef CONFIG_SPL_BUILD
 150 ALL-y += SPL
 151 endif
 152 else
 153 ifeq ($(CONFIG_OF_SEPARATE),y)
 154 ALL-y += u-boot-dtb.imx
 155 else
 156 ALL-y += u-boot.imx
 157 endif
 158 endif
 159 ifneq ($(CONFIG_VF610),)
 160 ALL-y += u-boot.vyb
 161 endif
 162 endif
 163
 164 EFI_LDS := elf_arm_efi.lds
 165 EFI_CRT0 := crt0_arm_efi.o
 166 EFI_RELOC := reloc_arm_efi.o