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+##
+## This file is part of the coreboot project.
+##
+## Copyright (C) 2014 Google Inc
+##
+## This program is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation; version 2 of the License.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program; if not, write to the Free Software
+## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+##
+
+ARCH_SUPPORTED := ARMV7 X86_32
+
+ARCH_TO_TOOLCHAIN_X86_32 := x86_32
+ARCH_TO_TOOLCHAIN_ARMV7 := armv7
+
+COREBOOT_STANDARD_STAGES := bootblock romstage ramstage
+
+ARCHDIR-i386 := x86
+ARCHDIR-x86_32 := x86
+ARCHDIR-armv7 := armv7
+
+CFLAGS_armv7 = \
+ -ffixed-r8\
+ -march=armv7-a\
+ -marm\
+ -mno-unaligned-access\
+ -mthumb\
+ -mthumb-interwork
+
+toolchain_to_dir = \
+ $(foreach arch,$(ARCH_SUPPORTED),\
+ $(eval INCLUDES_$(ARCH_TO_TOOLCHAIN_$(arch)) = \
+ -Isrc/arch/$(ARCHDIR-$(ARCH_TO_TOOLCHAIN_$(arch)))/include))
+
+# set_stage_toolchain: Decides the toolchain to be used by every stage
+# E.g.: If bootblock is x86_32, it sets ARCH-BOOTBLOCK-y = x86_32, whereas
+# ARCH-BOOTBLOCK-n = armv7. Then, ARCH-BOOTBLOCK-y can be used anywhere to
+# decide the compiler toolchain for bootblock stage
+# This step is essential for initializing the toolchain for coreboot standard
+# stages i.e. bootblock, romstage and ramstage, since it acts as the second
+# parameter to create_class_compiler below in init_standard_toolchain
+set_stage_toolchain= \
+ $(foreach arch,$(ARCH_SUPPORTED),$(eval ARCH-$(1)-$(CONFIG_ARCH_$(1)_$(arch)) := $(ARCH_TO_TOOLCHAIN_$(arch))))
+
+# create_class_compiler: Used to create compiler tool set for
+# special classes
+# @1: special class
+# @2: compiler set to be used
+# e.g.: smm special class uses i386 as compiler set
+define create_class_compiler
+CC_$(1) := $(CC_$(2))
+LD_$(1) := $(LD_$(2))
+NM_$(1) := $(NM_$(2))
+OBJCOPY_$(1) := $(OBJCOPY_$(2))
+OBJDUMP_$(1) := $(OBJDUMP_$(2))
+STRIP_$(1) := $(STRIP_$(2))
+READELF_$(1) := $(READELF_$(2))
+INCLUDES_$(1) = -Isrc/arch/$(ARCHDIR-$(2))/include
+CFLAGS_$(1) = $$(CFLAGS_common) $$(INCLUDES_$(1)) $(CFLAGS_$(2))
+LIBGCC_FILE_NAME_$(1) = $(shell test -r `$(CC_$(2)) -print-libgcc-file-name` && \
+ $(CC_$(2)) -print-libgcc-file-name)
+endef
+
+# initialize standard toolchain (CC,AS and others) for give stage
+# @1 : stage for which the toolchain is to be initialized
+init_standard_toolchain = \
+ $(eval stage_caps := $(shell tr '[:lower:]' '[:upper:]' <<< $(1))) \
+ $(eval $(call set_stage_toolchain,$(stage_caps))) \
+ $(eval $(call create_class_compiler,$(1),$(ARCH-$(stage_caps)-y))) \
+ $(eval $(call set_stage_libgcc,$(1)))
+
+init_stages = \
+ $(foreach stage,$(COREBOOT_STANDARD_STAGES),$(eval $(call init_standard_toolchain,$(stage))))
+
+# This mapping is created to have consistency with xcompile naming
+$(eval $(call create_class_compiler,x86_32,i386))
+
+$(eval $(call toolchain_to_dir))
+
+$(call init_stages)