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 LDFLAGS_FINAL += --gc-sections
  17 PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections \
  18                      -fno-common -ffixed-r9
  19 PLATFORM_RELFLAGS += $(call cc-option, -msoft-float) \
  20       $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
  21
  22 # LLVM support
  23 LLVMS_RELFLAGS          := $(call cc-option,-mllvm,) \
  24                         $(call cc-option,-target arm-none-eabi,) \
  25                         $(call cc-option,-arm-use-movt=0,)
  26 PLATFORM_RELFLAGS       += $(LLVM_RELFLAGS)
  27
  28 PLATFORM_CPPFLAGS += -D__ARM__
  29
  30 # Choose between ARM/Thumb instruction sets
  31 ifeq ($(CONFIG_SYS_THUMB_BUILD),y)
  32 AFLAGS_IMPLICIT_IT      := $(call as-option,-Wa$(comma)-mimplicit-it=always)
  33 PF_CPPFLAGS_ARM         := $(AFLAGS_IMPLICIT_IT) \
  34                         $(call cc-option, -mthumb -mthumb-interwork,\
  35                         $(call cc-option,-marm,)\
  36                         $(call cc-option,-mno-thumb-interwork,)\
  37                 )
  38 else
  39 PF_CPPFLAGS_ARM := $(call cc-option,-marm,) \
  40                 $(call cc-option,-mno-thumb-interwork,)
  41 endif
  42
  43 # Only test once
  44 ifneq ($(CONFIG_SPL_BUILD),y)
  45 ifeq ($(CONFIG_SYS_THUMB_BUILD),y)
  46 archprepare: checkthumb
  47
  48 checkthumb:
  49         @if test "$(call cc-name)" = "gcc" -a \
  50                         "$(call cc-version)" -lt "0404"; then \
  51                 echo -n '*** Your GCC does not produce working '; \
  52                 echo 'binaries in THUMB mode.'; \
  53                 echo '*** Your board is configured for THUMB mode.'; \
  54                 false; \
  55         fi
  56 endif
  57 endif
  58
  59 # Try if EABI is supported, else fall back to old API,
  60 # i. e. for example:
  61 # - with ELDK 4.2 (EABI supported), use:
  62 #       -mabi=aapcs-linux
  63 # - with ELDK 4.1 (gcc 4.x, no EABI), use:
  64 #       -mabi=apcs-gnu
  65 # - with ELDK 3.1 (gcc 3.x), use:
  66 #       -mapcs-32
  67 PF_CPPFLAGS_ABI := $(call cc-option,\
  68                         -mabi=aapcs-linux,\
  69                         $(call cc-option,\
  70                                 -mapcs-32,\
  71                                 $(call cc-option,\
  72                                         -mabi=apcs-gnu,\
  73                                 )\
  74                         )\
  75                 )
  76 PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_ARM) $(PF_CPPFLAGS_ABI)
  77
  78 # For EABI, make sure to provide raise()
  79 ifneq (,$(findstring -mabi=aapcs-linux,$(PLATFORM_CPPFLAGS)))
  80 # This file is parsed many times, so the string may get added multiple
  81 # times. Also, the prefix needs to be different based on whether
  82 # CONFIG_SPL_BUILD is defined or not. 'filter-out' the existing entry
  83 # before adding the correct one.
  84 PLATFORM_LIBS := arch/arm/lib/eabi_compat.o \
  85         $(filter-out arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS))
  86 endif
  87
  88 # needed for relocation
  89 LDFLAGS_u-boot += -pie
  90
  91 #
  92 # FIXME: binutils versions < 2.22 have a bug in the assembler where
  93 # branches to weak symbols can be incorrectly optimized in thumb mode
  94 # to a short branch (b.n instruction) that won't reach when the symbol
  95 # gets preempted
  96 #
  97 # http://sourceware.org/bugzilla/show_bug.cgi?id=12532
  98 #
  99 ifeq ($(CONFIG_SYS_THUMB_BUILD),y)
 100 ifeq ($(GAS_BUG_12532),)
 101 export GAS_BUG_12532:=$(shell if [ $(call binutils-version) -lt 0222 ] ; \
 102         then echo y; else echo n; fi)
 103 endif
 104 ifeq ($(GAS_BUG_12532),y)
 105 PLATFORM_RELFLAGS += -fno-optimize-sibling-calls
 106 endif
 107 endif
 108
 109 ifneq ($(CONFIG_SPL_BUILD),y)
 110 # Check that only R_ARM_RELATIVE relocations are generated.
 111 ALL-y += checkarmreloc
 112 # The movt / movw can hardcode 16 bit parts of the addresses in the
 113 # instruction. Relocation is not supported for that case, so disable
 114 # such usage by requiring word relocations.
 115 PLATFORM_CPPFLAGS += $(call cc-option, -mword-relocations)
 116 PLATFORM_CPPFLAGS += $(call cc-option, -fno-pic)
 117 endif
 118
 119 # limit ourselves to the sections we want in the .bin.
 120 ifdef CONFIG_ARM64
 121 OBJCOPYFLAGS += -j .text -j .rodata -j .data -j .u_boot_list -j .rela.dyn
 122 else
 123 OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .hash \
 124                 -j .data -j .got -j .got.plt -j .u_boot_list -j .rel.dyn
 125 endif
 126
 127 ifdef CONFIG_OF_EMBED
 128 OBJCOPYFLAGS += -j .dtb.init.rodata
 129 endif
 130
 131 ifdef CONFIG_EFI_LOADER
 132 OBJCOPYFLAGS += -j .efi_runtime -j .efi_runtime_rel
 133 endif
 134
 135 ifneq ($(CONFIG_IMX_CONFIG),)
 136 ifdef CONFIG_SPL
 137 ifndef CONFIG_SPL_BUILD
 138 ALL-y += SPL
 139 endif
 140 else
 141 ifeq ($(CONFIG_OF_SEPARATE),y)
 142 ALL-y += u-boot-dtb.imx
 143 else
 144 ALL-y += u-boot.imx
 145 endif
 146 endif
 147 endif