u-boot/arch/x86/Kconfig

menu "x86 architecture"
	depends on X86

config SYS_ARCH
	default "x86"

config USE_PRIVATE_LIBGCC
	default y

config SYS_VSNPRINTF
	default y

choice
	prompt "Mainboard vendor"
	default VENDOR_EMULATION

config VENDOR_COREBOOT
	bool "coreboot"

config VENDOR_EMULATION
	bool "emulation"

config VENDOR_GOOGLE
	bool "Google"

config VENDOR_INTEL
	bool "Intel"

endchoice

# board-specific options below
source "board/coreboot/Kconfig"
source "board/emulation/Kconfig"
source "board/google/Kconfig"
source "board/intel/Kconfig"

# platform-specific options below
source "arch/x86/cpu/baytrail/Kconfig"
source "arch/x86/cpu/coreboot/Kconfig"
source "arch/x86/cpu/ivybridge/Kconfig"
source "arch/x86/cpu/qemu/Kconfig"
source "arch/x86/cpu/quark/Kconfig"
source "arch/x86/cpu/queensbay/Kconfig"

# architecture-specific options below

config SYS_MALLOC_F_LEN
	default 0x800

config RAMBASE
	hex
	default 0x100000

config XIP_ROM_SIZE
	hex
	depends on X86_RESET_VECTOR
	default ROM_SIZE

config CPU_ADDR_BITS
	int
	default 36

config HPET_ADDRESS
	hex
	default 0xfed00000 if !HPET_ADDRESS_OVERRIDE

config SMM_TSEG
	bool
	default n

config SMM_TSEG_SIZE
	hex

config X86_RESET_VECTOR
	bool
	default n

config SYS_X86_START16
	hex
	depends on X86_RESET_VECTOR
	default 0xfffff800

config BOARD_ROMSIZE_KB_512
	bool
config BOARD_ROMSIZE_KB_1024
	bool
config BOARD_ROMSIZE_KB_2048
	bool
config BOARD_ROMSIZE_KB_4096
	bool
config BOARD_ROMSIZE_KB_8192
	bool
config BOARD_ROMSIZE_KB_16384
	bool

choice
	prompt "ROM chip size"
	depends on X86_RESET_VECTOR
	default UBOOT_ROMSIZE_KB_512 if BOARD_ROMSIZE_KB_512
	default UBOOT_ROMSIZE_KB_1024 if BOARD_ROMSIZE_KB_1024
	default UBOOT_ROMSIZE_KB_2048 if BOARD_ROMSIZE_KB_2048
	default UBOOT_ROMSIZE_KB_4096 if BOARD_ROMSIZE_KB_4096
	default UBOOT_ROMSIZE_KB_8192 if BOARD_ROMSIZE_KB_8192
	default UBOOT_ROMSIZE_KB_16384 if BOARD_ROMSIZE_KB_16384
	help
	  Select the size of the ROM chip you intend to flash U-Boot on.

	  The build system will take care of creating a u-boot.rom file
	  of the matching size.

config UBOOT_ROMSIZE_KB_512
	bool "512 KB"
	help
	  Choose this option if you have a 512 KB ROM chip.

config UBOOT_ROMSIZE_KB_1024
	bool "1024 KB (1 MB)"
	help
	  Choose this option if you have a 1024 KB (1 MB) ROM chip.

config UBOOT_ROMSIZE_KB_2048
	bool "2048 KB (2 MB)"
	help
	  Choose this option if you have a 2048 KB (2 MB) ROM chip.

config UBOOT_ROMSIZE_KB_4096
	bool "4096 KB (4 MB)"
	help
	  Choose this option if you have a 4096 KB (4 MB) ROM chip.

config UBOOT_ROMSIZE_KB_8192
	bool "8192 KB (8 MB)"
	help
	  Choose this option if you have a 8192 KB (8 MB) ROM chip.

config UBOOT_ROMSIZE_KB_16384
	bool "16384 KB (16 MB)"
	help
	  Choose this option if you have a 16384 KB (16 MB) ROM chip.

endchoice

# Map the config names to an integer (KB).
config UBOOT_ROMSIZE_KB
	int
	default 512 if UBOOT_ROMSIZE_KB_512
	default 1024 if UBOOT_ROMSIZE_KB_1024
	default 2048 if UBOOT_ROMSIZE_KB_2048
	default 4096 if UBOOT_ROMSIZE_KB_4096
	default 8192 if UBOOT_ROMSIZE_KB_8192
	default 16384 if UBOOT_ROMSIZE_KB_16384

# Map the config names to a hex value (bytes).
config ROM_SIZE
	hex
	default 0x80000 if UBOOT_ROMSIZE_KB_512
	default 0x100000 if UBOOT_ROMSIZE_KB_1024
	default 0x200000 if UBOOT_ROMSIZE_KB_2048
	default 0x400000 if UBOOT_ROMSIZE_KB_4096
	default 0x800000 if UBOOT_ROMSIZE_KB_8192
	default 0xc00000 if UBOOT_ROMSIZE_KB_12288
	default 0x1000000 if UBOOT_ROMSIZE_KB_16384

config HAVE_INTEL_ME
	bool "Platform requires Intel Management Engine"
	help
	  Newer higher-end devices have an Intel Management Engine (ME)
	  which is a very large binary blob (typically 1.5MB) which is
	  required for the platform to work. This enforces a particular
	  SPI flash format. You will need to supply the me.bin file in
	  your board directory.

config X86_RAMTEST
	bool "Perform a simple RAM test after SDRAM initialisation"
	help
	  If there is something wrong with SDRAM then the platform will
	  often crash within U-Boot or the kernel. This option enables a
	  very simple RAM test that quickly checks whether the SDRAM seems
	  to work correctly. It is not exhaustive but can save time by
	  detecting obvious failures.

config MARK_GRAPHICS_MEM_WRCOMB
	bool "Mark graphics memory as write-combining"
	default n
	help
	  The graphics performance may increase if the graphics
	  memory is set as write-combining cache type. This option
	  enables marking the graphics memory as write-combining.

config HAVE_FSP
	bool "Add an Firmware Support Package binary"
	help
	  Select this option to add an Firmware Support Package binary to
	  the resulting U-Boot image. It is a binary blob which U-Boot uses
	  to set up SDRAM and other chipset specific initialization.

	  Note: Without this binary U-Boot will not be able to set up its
	  SDRAM so will not boot.

config FSP_FILE
	string "Firmware Support Package binary filename"
	depends on HAVE_FSP
	default "fsp.bin"
	help
	  The filename of the file to use as Firmware Support Package binary
	  in the board directory.

config FSP_ADDR
	hex "Firmware Support Package binary location"
	depends on HAVE_FSP
	default 0xfffc0000
	help
	  FSP is not Position Independent Code (PIC) and the whole FSP has to
	  be rebased if it is placed at a location which is different from the
	  perferred base address specified during the FSP build. Use Intel's
	  Binary Configuration Tool (BCT) to do the rebase.

	  The default base address of 0xfffc0000 indicates that the binary must
	  be located at offset 0xc0000 from the beginning of a 1MB flash device.

config FSP_TEMP_RAM_ADDR
	hex
	default 0x2000000
	help
	  Stack top address which is used in FspInit after DRAM is ready and
	  CAR is disabled.

config MAX_CPUS
        int "Maximum number of CPUs permitted"
        default 4
        help
          When using multi-CPU chips it is possible for U-Boot to start up
          more than one CPU. The stack memory used by all of these CPUs is
          pre-allocated so at present U-Boot wants to know the maximum
          number of CPUs that may be present. Set this to at least as high
          as the number of CPUs in your system (it uses about 4KB of RAM for
          each CPU).

config SMP
	bool "Enable Symmetric Multiprocessing"
	default n
	help
	  Enable use of more than one CPU in U-Boot and the Operating System
	  when loaded. Each CPU will be started up and information can be
	  obtained using the 'cpu' command. If this option is disabled, then
	  only one CPU will be enabled regardless of the number of CPUs
	  available.

config AP_STACK_SIZE
	hex
	default 0x1000
	help
	  Each additional CPU started by U-Boot requires its own stack. This
	  option sets the stack size used by each CPU and directly affects
	  the memory used by this initialisation process. Typically 4KB is
	  enough space.

config TSC_CALIBRATION_BYPASS
	bool "Bypass Time-Stamp Counter (TSC) calibration"
	default n
	help
	  By default U-Boot automatically calibrates Time-Stamp Counter (TSC)
	  running frequency via Model-Specific Register (MSR) and Programmable
	  Interval Timer (PIT). If the calibration does not work on your board,
	  select this option and provide a hardcoded TSC running frequency with
	  CONFIG_TSC_FREQ_IN_MHZ below.

	  Normally this option should be turned on in a simulation environment
	  like qemu.

config TSC_FREQ_IN_MHZ
	int "Time-Stamp Counter (TSC) running frequency in MHz"
	depends on TSC_CALIBRATION_BYPASS
	default 1000
	help
	  The running frequency in MHz of Time-Stamp Counter (TSC).

menu "System tables"

config GENERATE_PIRQ_TABLE
	bool "Generate a PIRQ table"
	default n
	help
	  Generate a PIRQ routing table for this board. The PIRQ routing table
	  is generated by U-Boot in the system memory from 0xf0000 to 0xfffff
	  at every 16-byte boundary with a PCI IRQ routing signature ("$PIR").
	  It specifies the interrupt router information as well how all the PCI
	  devices' interrupt pins are wired to PIRQs.

config GENERATE_SFI_TABLE
	bool "Generate a SFI (Simple Firmware Interface) table"
	help
	  The Simple Firmware Interface (SFI) provides a lightweight method
	  for platform firmware to pass information to the operating system
	  via static tables in memory.  Kernel SFI support is required to
	  boot on SFI-only platforms.  If you have ACPI tables then these are
	  used instead.

	  U-Boot writes this table in write_sfi_table() just before booting
	  the OS.

	  For more information, see http://simplefirmware.org

endmenu

config MAX_PIRQ_LINKS
	int
	default 8
	help
	  This variable specifies the number of PIRQ interrupt links which are
	  routable. On most older chipsets, this is 4, PIRQA through PIRQD.
	  Some newer chipsets offer more than four links, commonly up to PIRQH.

config IRQ_SLOT_COUNT
	int
	default 128
	help
	  U-Boot can support up to 254 IRQ slot info in the PIRQ routing table
	  which in turns forms a table of exact 4KiB. The default value 128
	  should be enough for most boards. If this does not fit your board,
	  change it according to your needs.

config PCIE_ECAM_BASE
	hex
	default 0xe0000000
	help
	  This is the memory-mapped address of PCI configuration space, which
	  is only available through the Enhanced Configuration Access
	  Mechanism (ECAM) with PCI Express. It can be set up almost
	  anywhere. Before it is set up, it is possible to access PCI
	  configuration space through I/O access, but memory access is more
	  convenient. Using this, PCI can be scanned and configured. This
	  should be set to a region that does not conflict with memory
	  assigned to PCI devices - i.e. the memory and prefetch regions, as
	  passed to pci_set_region().

config BOOTSTAGE
	default y

config BOOTSTAGE_REPORT
	default y

config CMD_BOOTSTAGE
	default y

endmenu