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_OMAP_COMMON),)
  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_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                 $(call cc-option,-mno-thumb-interwork,)
  44 endif
  45
  46 # Only test once
  47 ifneq ($(CONFIG_SPL_BUILD),y)
  48 ifeq ($(CONFIG_SYS_THUMB_BUILD),y)
  49 archprepare: checkthumb
  50
  51 checkthumb:
  52         @if test "$(call cc-name)" = "gcc" -a \
  53                         "$(call cc-version)" -lt "0404"; then \
  54                 echo -n '*** Your GCC does not produce working '; \
  55                 echo 'binaries in THUMB mode.'; \
  56                 echo '*** Your board is configured for THUMB mode.'; \
  57                 false; \
  58         fi
  59 endif
  60 endif
  61
  62 # Try if EABI is supported, else fall back to old API,
  63 # i. e. for example:
  64 # - with ELDK 4.2 (EABI supported), use:
  65 #       -mabi=aapcs-linux
  66 # - with ELDK 4.1 (gcc 4.x, no EABI), use:
  67 #       -mabi=apcs-gnu
  68 # - with ELDK 3.1 (gcc 3.x), use:
  69 #       -mapcs-32
  70 PF_CPPFLAGS_ABI := $(call cc-option,\
  71                         -mabi=aapcs-linux,\
  72                         $(call cc-option,\
  73                                 -mapcs-32,\
  74                                 $(call cc-option,\
  75                                         -mabi=apcs-gnu,\
  76                                 )\
  77                         )\
  78                 )
  79 PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_ARM) $(PF_CPPFLAGS_ABI)
  80
  81 # For EABI, make sure to provide raise()
  82 ifneq (,$(findstring -mabi=aapcs-linux,$(PLATFORM_CPPFLAGS)))
  83 # This file is parsed many times, so the string may get added multiple
  84 # times. Also, the prefix needs to be different based on whether
  85 # CONFIG_SPL_BUILD is defined or not. 'filter-out' the existing entry
  86 # before adding the correct one.
  87 PLATFORM_LIBS := arch/arm/lib/eabi_compat.o \
  88         $(filter-out arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS))
  89 endif
  90
  91 # needed for relocation
  92 LDFLAGS_u-boot += -pie
  93
  94 #
  95 # FIXME: binutils versions < 2.22 have a bug in the assembler where
  96 # branches to weak symbols can be incorrectly optimized in thumb mode
  97 # to a short branch (b.n instruction) that won't reach when the symbol
  98 # gets preempted
  99 #
 100 # http://sourceware.org/bugzilla/show_bug.cgi?id=12532
 101 #
 102 ifeq ($(CONFIG_SYS_THUMB_BUILD),y)
 103 ifeq ($(GAS_BUG_12532),)
 104 export GAS_BUG_12532:=$(shell if [ $(call binutils-version) -lt 0222 ] ; \
 105         then echo y; else echo n; fi)
 106 endif
 107 ifeq ($(GAS_BUG_12532),y)
 108 PLATFORM_RELFLAGS += -fno-optimize-sibling-calls
 109 endif
 110 endif
 111
 112 ifneq ($(CONFIG_SPL_BUILD),y)
 113 # Check that only R_ARM_RELATIVE relocations are generated.
 114 ALL-y += checkarmreloc
 115 # The movt / movw can hardcode 16 bit parts of the addresses in the
 116 # instruction. Relocation is not supported for that case, so disable
 117 # such usage by requiring word relocations.
 118 PLATFORM_CPPFLAGS += $(call cc-option, -mword-relocations)
 119 PLATFORM_CPPFLAGS += $(call cc-option, -fno-pic)
 120 endif
 121
 122 # limit ourselves to the sections we want in the .bin.
 123 ifdef CONFIG_ARM64
 124 OBJCOPYFLAGS += -j .text -j .rodata -j .data -j .u_boot_list -j .rela.dyn
 125 else
 126 OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .hash \
 127                 -j .data -j .got -j .got.plt -j .u_boot_list -j .rel.dyn
 128 endif
 129
 130 ifdef CONFIG_OF_EMBED
 131 OBJCOPYFLAGS += -j .dtb.init.rodata
 132 endif
 133
 134 ifdef CONFIG_EFI_LOADER
 135 OBJCOPYFLAGS += -j .efi_runtime -j .efi_runtime_rel
 136 endif
 137
 138 ifneq ($(CONFIG_IMX_CONFIG),)
 139 ifdef CONFIG_SPL
 140 ifndef CONFIG_SPL_BUILD
 141 ALL-y += SPL
 142 endif
 143 else
 144 ifeq ($(CONFIG_OF_SEPARATE),y)
 145 ALL-y += u-boot-dtb.imx
 146 else
 147 ALL-y += u-boot.imx
 148 endif
 149 endif
 150 ifneq ($(CONFIG_VF610),)
 151 ALL-y += u-boot.vyb
 152 endif
 153 endif
 154
 155 EFI_LDS := elf_arm_efi.lds
 156 EFI_CRT0 := crt0_arm_efi.o
 157 EFI_RELOC := reloc_arm_efi.o