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_OMAP2),)
  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_$(SPL_)SYS_THUMB_BUILD),y)
  48 archprepare: checkthumb
  49
  50 checkthumb:
  51         @if test "$(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 endif
  59
  60 # Try if EABI is supported, else fall back to old API,
  61 # i. e. for example:
  62 # - with ELDK 4.2 (EABI supported), use:
  63 #       -mabi=aapcs-linux
  64 # - with ELDK 4.1 (gcc 4.x, no EABI), use:
  65 #       -mabi=apcs-gnu
  66 # - with ELDK 3.1 (gcc 3.x), use:
  67 #       -mapcs-32
  68 PF_CPPFLAGS_ABI := $(call cc-option,\
  69                         -mabi=aapcs-linux,\
  70                         $(call cc-option,\
  71                                 -mapcs-32,\
  72                                 $(call cc-option,\
  73                                         -mabi=apcs-gnu,\
  74                                 )\
  75                         )\
  76                 )
  77 PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_ARM) $(PF_CPPFLAGS_ABI)
  78
  79 # For EABI, make sure to provide raise()
  80 ifneq (,$(findstring -mabi=aapcs-linux,$(PLATFORM_CPPFLAGS)))
  81 # This file is parsed many times, so the string may get added multiple
  82 # times. Also, the prefix needs to be different based on whether
  83 # CONFIG_SPL_BUILD is defined or not. 'filter-out' the existing entry
  84 # before adding the correct one.
  85 PLATFORM_LIBS := arch/arm/lib/eabi_compat.o \
  86         $(filter-out arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS))
  87 endif
  88
  89 # needed for relocation
  90 LDFLAGS_u-boot += -pie
  91
  92 #
  93 # FIXME: binutils versions < 2.22 have a bug in the assembler where
  94 # branches to weak symbols can be incorrectly optimized in thumb mode
  95 # to a short branch (b.n instruction) that won't reach when the symbol
  96 # gets preempted
  97 #
  98 # http://sourceware.org/bugzilla/show_bug.cgi?id=12532
  99 #
 100 ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y)
 101 ifeq ($(GAS_BUG_12532),)
 102 export GAS_BUG_12532:=$(shell if [ $(call binutils-version) -lt 0222 ] ; \
 103         then echo y; else echo n; fi)
 104 endif
 105 ifeq ($(GAS_BUG_12532),y)
 106 PLATFORM_RELFLAGS += -fno-optimize-sibling-calls
 107 endif
 108 endif
 109
 110 ifneq ($(CONFIG_SPL_BUILD),y)
 111 # Check that only R_ARM_RELATIVE relocations are generated.
 112 ALL-y += checkarmreloc
 113 # The movt / movw can hardcode 16 bit parts of the addresses in the
 114 # instruction. Relocation is not supported for that case, so disable
 115 # such usage by requiring word relocations.
 116 PLATFORM_CPPFLAGS += $(call cc-option, -mword-relocations)
 117 PLATFORM_CPPFLAGS += $(call cc-option, -fno-pic)
 118 endif
 119
 120 # limit ourselves to the sections we want in the .bin.
 121 ifdef CONFIG_ARM64
 122 OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .data \
 123                 -j .u_boot_list -j .rela.dyn -j .got -j .got.plt
 124 else
 125 OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .hash \
 126                 -j .data -j .got -j .got.plt -j .u_boot_list -j .rel.dyn
 127 endif
 128
 129 ifdef CONFIG_OF_EMBED
 130 OBJCOPYFLAGS += -j .dtb.init.rodata
 131 endif
 132
 133 ifdef CONFIG_EFI_LOADER
 134 OBJCOPYFLAGS += -j .efi_runtime -j .efi_runtime_rel
 135 endif
 136
 137 ifneq ($(CONFIG_IMX_CONFIG),)
 138 ifdef CONFIG_SPL
 139 ifndef CONFIG_SPL_BUILD
 140 ALL-y += SPL
 141 endif
 142 else
 143 ifeq ($(CONFIG_OF_SEPARATE),y)
 144 ALL-y += u-boot-dtb.imx
 145 else
 146 ALL-y += u-boot.imx
 147 endif
 148 endif
 149 ifneq ($(CONFIG_VF610),)
 150 ALL-y += u-boot.vyb
 151 endif
 152 endif
 153
 154 EFI_LDS := elf_arm_efi.lds
 155 EFI_CRT0 := crt0_arm_efi.o
 156 EFI_RELOC := reloc_arm_efi.o