u-boot/arch/Kconfig

config CREATE_ARCH_SYMLINK
	bool

config HAVE_GENERIC_BOARD
	bool

config SYS_GENERIC_BOARD
	bool
	depends on HAVE_GENERIC_BOARD

choice
	prompt "Architecture select"
	default SANDBOX

config ARC
	bool "ARC architecture"
	select HAVE_PRIVATE_LIBGCC
	select HAVE_GENERIC_BOARD
	select SYS_GENERIC_BOARD
	select SUPPORT_OF_CONTROL

config ARM
	bool "ARM architecture"
	select CREATE_ARCH_SYMLINK
	select HAVE_PRIVATE_LIBGCC if !ARM64
	select HAVE_GENERIC_BOARD
	select SYS_GENERIC_BOARD
	select SUPPORT_OF_CONTROL

config AVR32
	bool "AVR32 architecture"
	select CREATE_ARCH_SYMLINK
	select HAVE_GENERIC_BOARD
	select SYS_GENERIC_BOARD

config BLACKFIN
	bool "Blackfin architecture"
	select HAVE_GENERIC_BOARD
	select SYS_GENERIC_BOARD

config M68K
	bool "M68000 architecture"
	select HAVE_PRIVATE_LIBGCC
	select HAVE_GENERIC_BOARD
	select SYS_GENERIC_BOARD

config MICROBLAZE
	bool "MicroBlaze architecture"
	select HAVE_GENERIC_BOARD
	select SYS_GENERIC_BOARD
	select SUPPORT_OF_CONTROL

config MIPS
	bool "MIPS architecture"
	select HAVE_PRIVATE_LIBGCC
	select HAVE_GENERIC_BOARD
	select SYS_GENERIC_BOARD
	select SUPPORT_OF_CONTROL

config NDS32
	bool "NDS32 architecture"
	select HAVE_GENERIC_BOARD
	select SYS_GENERIC_BOARD

config NIOS2
	bool "Nios II architecture"
	select HAVE_GENERIC_BOARD
	select SYS_GENERIC_BOARD
	select SUPPORT_OF_CONTROL
	select OF_CONTROL
	select DM
	select CPU

config OPENRISC
	bool "OpenRISC architecture"

config PPC
	bool "PowerPC architecture"
	select HAVE_PRIVATE_LIBGCC
	select HAVE_GENERIC_BOARD
	select SYS_GENERIC_BOARD
	select SUPPORT_OF_CONTROL

config SANDBOX
	bool "Sandbox"
	select HAVE_GENERIC_BOARD
	select SYS_GENERIC_BOARD
	select SUPPORT_OF_CONTROL
	select DM
	select DM_SPI_FLASH
	select DM_SERIAL
	select DM_I2C
	select DM_SPI
	select DM_GPIO

config SH
	bool "SuperH architecture"
	select HAVE_PRIVATE_LIBGCC

config SPARC
	bool "SPARC architecture"
	select HAVE_GENERIC_BOARD
	select CREATE_ARCH_SYMLINK

config X86
	bool "x86 architecture"
	select CREATE_ARCH_SYMLINK
	select HAVE_PRIVATE_LIBGCC
	select HAVE_GENERIC_BOARD
	select SYS_GENERIC_BOARD
	select SUPPORT_OF_CONTROL
	select DM
	select DM_SERIAL
	select DM_GPIO
	select DM_SPI
	select DM_SPI_FLASH

endchoice

config SYS_ARCH
	string
	help
	  This option should contain the architecture name to build the
	  appropriate arch/<CONFIG_SYS_ARCH> directory.
	  All the architectures should specify this option correctly.

config SYS_CPU
	string
	help
	  This option should contain the CPU name to build the correct
	  arch/<CONFIG_SYS_ARCH>/cpu/<CONFIG_SYS_CPU> directory.

	  This is optional.  For those targets without the CPU directory,
	  leave this option empty.

config SYS_SOC
	string
	help
	  This option should contain the SoC name to build the directory
	  arch/<CONFIG_SYS_ARCH>/cpu/<CONFIG_SYS_CPU>/<CONFIG_SYS_SOC>.

	  This is optional.  For those targets without the SoC directory,
	  leave this option empty.

config SYS_VENDOR
	string
	help
	  This option should contain the vendor name of the target board.
	  If it is set and
	  board/<CONFIG_SYS_VENDOR>/common/Makefile exists, the vendor common
	  directory is compiled.
	  If CONFIG_SYS_BOARD is also set, the sources under
	  board/<CONFIG_SYS_VENDOR>/<CONFIG_SYS_BOARD> directory are compiled.

	  This is optional.  For those targets without the vendor directory,
	  leave this option empty.

config SYS_BOARD
	string
	help
	  This option should contain the name of the target board.
	  If it is set, either board/<CONFIG_SYS_VENDOR>/<CONFIG_SYS_BOARD>
	  or board/<CONFIG_SYS_BOARD> directory is compiled depending on
	  whether CONFIG_SYS_VENDOR is set or not.

	  This is optional.  For those targets without the board directory,
	  leave this option empty.

config SYS_CONFIG_NAME
	string
	help
	  This option should contain the base name of board header file.
	  The header file include/configs/<CONFIG_SYS_CONFIG_NAME>.h
	  should be included from include/config.h.

source "arch/arc/Kconfig"
source "arch/arm/Kconfig"
source "arch/avr32/Kconfig"
source "arch/blackfin/Kconfig"
source "arch/m68k/Kconfig"
source "arch/microblaze/Kconfig"
source "arch/mips/Kconfig"
source "arch/nds32/Kconfig"
source "arch/nios2/Kconfig"
source "arch/openrisc/Kconfig"
source "arch/powerpc/Kconfig"
source "arch/sandbox/Kconfig"
source "arch/sh/Kconfig"
source "arch/sparc/Kconfig"
source "arch/x86/Kconfig"