#
  # SPDX-License-Identifier:	GPL-2.0+
  #

  ifeq ($(CONFIG_SPL_BUILD)$(CONFIG_TEGRA),yy)
  CONFIG_CPU_V7=
  CONFIG_CPU_ARM720T=y
  endif

  # This selects which instruction set is used.
  arch-$(CONFIG_CPU_ARM720T)	=-march=armv4

  arch-$(CONFIG_CPU_ARM920T)	=-march=armv4t

  arch-$(CONFIG_CPU_ARM926EJS)	=-march=armv5te

  arch-$(CONFIG_CPU_ARM946ES)	=-march=armv5te

  arch-$(CONFIG_CPU_SA1100)	=-march=armv4
  arch-$(CONFIG_CPU_PXA)		=
  arch-$(CONFIG_CPU_ARM1136)	=-march=armv5
  arch-$(CONFIG_CPU_ARM1176)	=-march=armv5t

  arch-$(CONFIG_CPU_V7)		=$(call cc-option, -march=armv7-a, \
  				 $(call cc-option, -march=armv7, -march=armv5))

  arch-$(CONFIG_ARM64)		=-march=armv8-a -mgeneral-regs-only

  # On Tegra systems we must build SPL for the armv4 core on the device
  # but otherwise we can use the value in CONFIG_SYS_ARM_ARCH
  ifeq ($(CONFIG_SPL_BUILD)$(CONFIG_TEGRA),yy)
  arch-y += -D__LINUX_ARM_ARCH__=4
  else
  arch-y += -D__LINUX_ARM_ARCH__=$(CONFIG_SYS_ARM_ARCH)
  endif

  # Evaluate arch cc-option calls now
  arch-y := $(arch-y)
  
  # This selects how we optimise for the processor.
  tune-$(CONFIG_CPU_ARM720T)	=-mtune=arm7tdmi
  tune-$(CONFIG_CPU_ARM920T)	=
  tune-$(CONFIG_CPU_ARM926EJS)	=
  tune-$(CONFIG_CPU_ARM946ES)	=
  tune-$(CONFIG_CPU_SA1100)	=-mtune=strongarm1100
  tune-$(CONFIG_CPU_PXA)		=-mcpu=xscale
  tune-$(CONFIG_CPU_ARM1136)	=
  tune-$(CONFIG_CPU_ARM1176)	=
  tune-$(CONFIG_CPU_V7)		=
  tune-$(CONFIG_ARM64)		=
  
  # Evaluate tune cc-option calls now
  tune-y := $(tune-y)
  
  PLATFORM_CPPFLAGS += $(arch-y) $(tune-y)

  # Machine directory name.  This list is sorted alphanumerically
  # by CONFIG_* macro name.

  machine-$(CONFIG_ARCH_ASPEED)		+= aspeed

  machine-$(CONFIG_ARCH_AT91)		+= at91

  machine-$(CONFIG_ARCH_BCM283X)		+= bcm283x

  machine-$(CONFIG_ARCH_DAVINCI)		+= davinci

  machine-$(CONFIG_ARCH_EXYNOS)		+= exynos

  machine-$(CONFIG_ARCH_HIGHBANK)		+= highbank

  machine-$(CONFIG_ARCH_KEYSTONE)		+= keystone

  # TODO: rename CONFIG_KIRKWOOD -> CONFIG_ARCH_KIRKWOOD
  machine-$(CONFIG_KIRKWOOD)		+= kirkwood

  machine-$(CONFIG_ARCH_MESON)		+= meson

  machine-$(CONFIG_ARCH_MVEBU)		+= mvebu

  # TODO: rename CONFIG_TEGRA -> CONFIG_ARCH_TEGRA

  # TODO: rename CONFIG_ORION5X -> CONFIG_ARCH_ORION5X
  machine-$(CONFIG_ORION5X)		+= orion5x

  machine-$(CONFIG_ARCH_OMAP2PLUS)	+= omap2

  machine-$(CONFIG_ARCH_S5PC1XX)		+= s5pc1xx

  machine-$(CONFIG_ARCH_SUNXI)		+= sunxi

  machine-$(CONFIG_ARCH_SNAPDRAGON)	+= snapdragon

  machine-$(CONFIG_ARCH_SOCFPGA)		+= socfpga

  machine-$(CONFIG_ARCH_RMOBILE)		+= rmobile

  machine-$(CONFIG_ARCH_ROCKCHIP)		+= rockchip

  machine-$(CONFIG_STM32)			+= stm32

  machine-$(CONFIG_TEGRA)			+= tegra

  machine-$(CONFIG_ARCH_UNIPHIER)		+= uniphier

  machine-$(CONFIG_ARCH_ZYNQ)		+= zynq

  
  machdirs := $(patsubst %,arch/arm/mach-%/,$(machine-y))

  PLATFORM_CPPFLAGS += $(patsubst %,-I$(srctree)/%include,$(machdirs))

  libs-y += $(machdirs)

  head-y := arch/arm/cpu/$(CPU)/start.o
  
  ifeq ($(CONFIG_SPL_BUILD),y)
  ifneq ($(CONFIG_SPL_START_S_PATH),)
  head-y := $(CONFIG_SPL_START_S_PATH:"%"=%)/start.o
  endif
  endif
  
  libs-y += arch/arm/cpu/$(CPU)/
  libs-y += arch/arm/cpu/
  libs-y += arch/arm/lib/
  
  ifeq ($(CONFIG_SPL_BUILD),y)

  ifneq (,$(CONFIG_MX23)$(CONFIG_MX28)$(CONFIG_MX35)$(filter $(SOC), mx25 mx5 mx6 mx7 mx35 imx8m imx8))

  libs-y += arch/arm/mach-imx/

  endif
  else

  ifneq (,$(filter $(SOC), mx25 mx27 mx5 mx6 mx7 mx7ulp mx31 mx35 mxs imx8 imx8m vf610))

  libs-y += arch/arm/mach-imx/

  endif
  endif

  ifneq (,$(filter $(SOC), kirkwood))
  libs-y += arch/arm/mach-mvebu/

  endif

  
  # deprecated
  -include $(machdirs)/config.mk