config.mk

   1 #
   2 # (C) Copyright 2000-2013
   3 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4 #
   5 # SPDX-License-Identifier:      GPL-2.0+
   6 #
   7 #########################################################################
   8
   9 ifeq ($(CURDIR),$(SRCTREE))
  10 dir :=
  11 else
  12 dir := $(subst $(SRCTREE)/,,$(CURDIR))
  13 endif
  14
  15 ifneq ($(OBJTREE),$(SRCTREE))
  16 # Create object files for SPL in a separate directory
  17 ifeq ($(CONFIG_SPL_BUILD),y)
  18 ifeq ($(CONFIG_TPL_BUILD),y)
  19 obj := $(if $(dir),$(TPLTREE)/$(dir)/,$(TPLTREE)/)
  20 else
  21 obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/)
  22 endif
  23 else
  24 obj := $(if $(dir),$(OBJTREE)/$(dir)/,$(OBJTREE)/)
  25 endif
  26 src := $(if $(dir),$(SRCTREE)/$(dir)/,$(SRCTREE)/)
  27
  28 $(shell mkdir -p $(obj))
  29 else
  30 # Create object files for SPL in a separate directory
  31 ifeq ($(CONFIG_SPL_BUILD),y)
  32 ifeq ($(CONFIG_TPL_BUILD),y)
  33 obj := $(if $(dir),$(TPLTREE)/$(dir)/,$(TPLTREE)/)
  34 else
  35 obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/)
  36
  37 endif
  38 $(shell mkdir -p $(obj))
  39 else
  40 obj :=
  41 endif
  42 src :=
  43 endif
  44
  45 # clean the slate ...
  46 PLATFORM_RELFLAGS =
  47 PLATFORM_CPPFLAGS =
  48 PLATFORM_LDFLAGS =
  49
  50 #########################################################################
  51
  52 # Load generated board configuration
  53 ifeq ($(CONFIG_TPL_BUILD),y)
  54 # Include TPL autoconf
  55 sinclude $(OBJTREE)/include/tpl-autoconf.mk
  56 else
  57 ifeq ($(CONFIG_SPL_BUILD),y)
  58 # Include SPL autoconf
  59 sinclude $(OBJTREE)/include/spl-autoconf.mk
  60 else
  61 # Include normal autoconf
  62 sinclude $(OBJTREE)/include/autoconf.mk
  63 endif
  64 endif
  65 sinclude $(OBJTREE)/include/config.mk
  66
  67 # Some architecture config.mk files need to know what CPUDIR is set to,
  68 # so calculate CPUDIR before including ARCH/SOC/CPU config.mk files.
  69 # Check if arch/$ARCH/cpu/$CPU exists, otherwise assume arch/$ARCH/cpu contains
  70 # CPU-specific code.
  71 CPUDIR=arch/$(ARCH)/cpu/$(CPU)
  72 ifneq ($(SRCTREE)/$(CPUDIR),$(wildcard $(SRCTREE)/$(CPUDIR)))
  73 CPUDIR=arch/$(ARCH)/cpu
  74 endif
  75
  76 sinclude $(TOPDIR)/arch/$(ARCH)/config.mk       # include architecture dependend rules
  77 sinclude $(TOPDIR)/$(CPUDIR)/config.mk          # include  CPU  specific rules
  78
  79 ifdef   SOC
  80 sinclude $(TOPDIR)/$(CPUDIR)/$(SOC)/config.mk   # include  SoC  specific rules
  81 endif
  82 ifdef   VENDOR
  83 BOARDDIR = $(VENDOR)/$(BOARD)
  84 else
  85 BOARDDIR = $(BOARD)
  86 endif
  87 ifdef   BOARD
  88 sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk  # include board specific rules
  89 endif
  90
  91 #########################################################################
  92
  93 RELFLAGS= $(PLATFORM_RELFLAGS)
  94
  95 OBJCFLAGS += --gap-fill=0xff
  96
  97 gccincdir := $(shell $(CC) -print-file-name=include)
  98
  99 CPPFLAGS = $(KBUILD_CPPFLAGS) $(RELFLAGS)
 100
 101 # Enable garbage collection of un-used sections for SPL
 102 ifeq ($(CONFIG_SPL_BUILD),y)
 103 CPPFLAGS += -ffunction-sections -fdata-sections
 104 LDFLAGS_FINAL += --gc-sections
 105 endif
 106
 107 ifneq ($(CONFIG_SYS_TEXT_BASE),)
 108 CPPFLAGS += -DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE)
 109 endif
 110
 111 ifeq ($(CONFIG_SPL_BUILD),y)
 112 CPPFLAGS += -DCONFIG_SPL_BUILD
 113 ifeq ($(CONFIG_TPL_BUILD),y)
 114 CPPFLAGS += -DCONFIG_TPL_BUILD
 115 endif
 116 endif
 117
 118 # Does this architecture support generic board init?
 119 ifeq ($(__HAVE_ARCH_GENERIC_BOARD),)
 120 ifneq ($(CONFIG_SYS_GENERIC_BOARD),)
 121 CHECK_GENERIC_BOARD = $(error Your architecture does not support generic board. \
 122 Please undefined CONFIG_SYS_GENERIC_BOARD in your board config file)
 123 endif
 124 endif
 125
 126 ifneq ($(OBJTREE),$(SRCTREE))
 127 CPPFLAGS += -I$(OBJTREE)/include
 128 endif
 129
 130 CPPFLAGS += -I$(TOPDIR)/include -I$(SRCTREE)/arch/$(ARCH)/include
 131 CPPFLAGS += -nostdinc   \
 132         -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS)
 133
 134 CFLAGS := $(KBUILD_CFLAGS) $(CPPFLAGS)
 135
 136 BCURDIR = $(subst $(SRCTREE)/,,$(CURDIR:$(obj)%=%))
 137
 138 ifeq ($(findstring examples/,$(BCURDIR)),)
 139 ifeq ($(CONFIG_SPL_BUILD),)
 140 ifdef FTRACE
 141 CFLAGS += -finstrument-functions -DFTRACE
 142 endif
 143 endif
 144 endif
 145
 146 AFLAGS := $(KBUILD_AFLAGS) $(CPPFLAGS)
 147
 148 LDFLAGS += $(PLATFORM_LDFLAGS)
 149 LDFLAGS_FINAL += -Bstatic
 150
 151 LDFLAGS_u-boot += -T $(obj)u-boot.lds $(LDFLAGS_FINAL)
 152 ifneq ($(CONFIG_SYS_TEXT_BASE),)
 153 LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE)
 154 endif
 155
 156 LDFLAGS_$(SPL_BIN) += -T $(obj)u-boot-spl.lds $(LDFLAGS_FINAL)
 157 ifneq ($(CONFIG_SPL_TEXT_BASE),)
 158 LDFLAGS_$(SPL_BIN) += -Ttext $(CONFIG_SPL_TEXT_BASE)
 159 endif
 160
 161 #########################################################################
 162
 163 export  CONFIG_SYS_TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS