arch/xtensa/Kconfig - arm/linux - Git at Google


            
            config ZONE_DMA

            
            	def_bool y


            config XTENSA

            
            	def_bool y

            
            	select ARCH_WANT_FRAME_POINTERS

            
            	select ARCH_WANT_IPC_PARSE_VERSION

            
            	select ARCH_WANT_OPTIONAL_GPIOLIB

            
            	select BUILDTIME_EXTABLE_SORT

            
            	select CLONE_BACKWARDS

            
            	select COMMON_CLK

            
            	select GENERIC_ATOMIC64

            
            	select GENERIC_CLOCKEVENTS

            
            	select GENERIC_IRQ_SHOW

            
            	select GENERIC_PCI_IOMAP

            
            	select GENERIC_SCHED_CLOCK

            
            	select HAVE_DMA_API_DEBUG

            
            	select HAVE_DMA_ATTRS

            
            	select HAVE_FUNCTION_TRACER

            
            	select HAVE_IRQ_TIME_ACCOUNTING

            
            	select HAVE_OPROFILE

            
            	select HAVE_PERF_EVENTS

            
            	select IRQ_DOMAIN

            
            	select MODULES_USE_ELF_RELA

            
            	select PERF_USE_VMALLOC

            
            	select VIRT_TO_BUS

            
            	help

            
            	  Xtensa processors are 32-bit RISC machines designed by Tensilica

            
            	  primarily for embedded systems.  These processors are both

            
            	  configurable and extensible.  The Linux port to the Xtensa

            
            	  architecture supports all processor configurations and extensions,

            
            	  with reasonable minimum requirements.  The Xtensa Linux project has

            
            	  a home page at <http://www.linux-xtensa.org/>.


            config RWSEM_XCHGADD_ALGORITHM

            
            	def_bool y


            config GENERIC_HWEIGHT

            
            	def_bool y


            config ARCH_HAS_ILOG2_U32

            
            	def_bool n


            config ARCH_HAS_ILOG2_U64

            
            	def_bool n


            config NO_IOPORT_MAP

            
            	def_bool n


            config HZ

            
            	int

            
            	default 100


            source "init/Kconfig"

            
            source "kernel/Kconfig.freezer"


            config LOCKDEP_SUPPORT

            
            	def_bool y


            config STACKTRACE_SUPPORT

            
            	def_bool y


            config TRACE_IRQFLAGS_SUPPORT

            
            	def_bool y


            config MMU

            
            	def_bool n


            config VARIANT_IRQ_SWITCH

            
            	def_bool n


            config HAVE_XTENSA_GPIO32

            
            	def_bool n


            menu "Processor type and features"


            choice

            
            	prompt "Xtensa Processor Configuration"

            
            	default XTENSA_VARIANT_FSF


            config XTENSA_VARIANT_FSF

            
            	bool "fsf - default (not generic) configuration"

            
            	select MMU


            config XTENSA_VARIANT_DC232B

            
            	bool "dc232b - Diamond 232L Standard Core Rev.B (LE)"

            
            	select MMU

            
            	select HAVE_XTENSA_GPIO32

            
            	help

            
            	  This variant refers to Tensilica's Diamond 232L Standard core Rev.B (LE).


            config XTENSA_VARIANT_DC233C

            
            	bool "dc233c - Diamond 233L Standard Core Rev.C (LE)"

            
            	select MMU

            
            	select HAVE_XTENSA_GPIO32

            
            	help

            
            	  This variant refers to Tensilica's Diamond 233L Standard core Rev.C (LE).


            config XTENSA_VARIANT_CUSTOM

            
            	bool "Custom Xtensa processor configuration"

            
            	select HAVE_XTENSA_GPIO32

            
            	help

            
            	  Select this variant to use a custom Xtensa processor configuration.

            
            	  You will be prompted for a processor variant CORENAME.

            
            endchoice


            config XTENSA_VARIANT_CUSTOM_NAME

            
            	string "Xtensa Processor Custom Core Variant Name"

            
            	depends on XTENSA_VARIANT_CUSTOM

            
            	help

            
            	  Provide the name of a custom Xtensa processor variant.

            
            	  This CORENAME selects arch/xtensa/variant/CORENAME.

            
            	  Dont forget you have to select MMU if you have one.


            config XTENSA_VARIANT_NAME

            
            	string

            
            	default "dc232b"			if XTENSA_VARIANT_DC232B

            
            	default "dc233c"			if XTENSA_VARIANT_DC233C

            
            	default "fsf"				if XTENSA_VARIANT_FSF

            
            	default XTENSA_VARIANT_CUSTOM_NAME	if XTENSA_VARIANT_CUSTOM


            config XTENSA_VARIANT_MMU

            
            	bool "Core variant has a Full MMU (TLB, Pages, Protection, etc)"

            
            	depends on XTENSA_VARIANT_CUSTOM

            
            	default y

            
            	select MMU

            
            	help

            
            	  Build a Conventional Kernel with full MMU support,

            
            	  ie: it supports a TLB with auto-loading, page protection.


            config XTENSA_VARIANT_HAVE_PERF_EVENTS

            
            	bool "Core variant has Performance Monitor Module"

            
            	depends on XTENSA_VARIANT_CUSTOM

            
            	default n

            
            	help

            
            	  Enable if core variant has Performance Monitor Module with

            
            	  External Registers Interface.


            	  If unsure, say N.


            config XTENSA_UNALIGNED_USER

            
            	bool "Unaligned memory access in use space"

            
            	help

            
            	  The Xtensa architecture currently does not handle unaligned

            
            	  memory accesses in hardware but through an exception handler.

            
            	  Per default, unaligned memory accesses are disabled in user space.


            	  Say Y here to enable unaligned memory access in user space.


            source "kernel/Kconfig.preempt"


            config HAVE_SMP

            
            	bool "System Supports SMP (MX)"

            
            	depends on XTENSA_VARIANT_CUSTOM

            
            	select XTENSA_MX

            
            	help

            
            	  This option is use to indicate that the system-on-a-chip (SOC)

            
            	  supports Multiprocessing. Multiprocessor support implemented above

            
            	  the CPU core definition and currently needs to be selected manually.


            	  Multiprocessor support in implemented with external cache and

            
            	  interrupt controllers.


            	  The MX interrupt distributer adds Interprocessor Interrupts

            
            	  and causes the IRQ numbers to be increased by 4 for devices

            
            	  like the open cores ethernet driver and the serial interface.


            	  You still have to select "Enable SMP" to enable SMP on this SOC.


            config SMP

            
            	bool "Enable Symmetric multi-processing support"

            
            	depends on HAVE_SMP

            
            	select GENERIC_SMP_IDLE_THREAD

            
            	help

            
            	  Enabled SMP Software; allows more than one CPU/CORE

            
            	  to be activated during startup.


            config NR_CPUS

            
            	depends on SMP

            
            	int "Maximum number of CPUs (2-32)"

            
            	range 2 32

            
            	default "4"


            config HOTPLUG_CPU

            
            	bool "Enable CPU hotplug support"

            
            	depends on SMP

            
            	help

            
            	  Say Y here to allow turning CPUs off and on. CPUs can be

            
            	  controlled through /sys/devices/system/cpu.


            	  Say N if you want to disable CPU hotplug.


            config INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX

            
            	bool "Initialize Xtensa MMU inside the Linux kernel code"

            
            	default y

            
            	help

            
            	  Earlier version initialized the MMU in the exception vector

            
            	  before jumping to _startup in head.S and had an advantage that

            
            	  it was possible to place a software breakpoint at 'reset' and

            
            	  then enter your normal kernel breakpoints once the MMU was mapped

            
            	  to the kernel mappings (0XC0000000).


            	  This unfortunately doesn't work for U-Boot and likley also wont

            
            	  work for using KEXEC to have a hot kernel ready for doing a

            
            	  KDUMP.


            	  So now the MMU is initialized in head.S but it's necessary to

            
            	  use hardware breakpoints (gdb 'hbreak' cmd) to break at _startup.

            
            	  xt-gdb can't place a Software Breakpoint in the  0XD region prior

            
            	  to mapping the MMU and after mapping even if the area of low memory

            
            	  was mapped gdb wouldn't remove the breakpoint on hitting it as the

            
            	  PC wouldn't match. Since Hardware Breakpoints are recommended for

            
            	  Linux configurations it seems reasonable to just assume they exist

            
            	  and leave this older mechanism for unfortunate souls that choose

            
            	  not to follow Tensilica's recommendation.


            	  Selecting this will cause U-Boot to set the KERNEL Load and Entry

            
            	  address at 0x00003000 instead of the mapped std of 0xD0003000.


            	  If in doubt, say Y.


            config HIGHMEM

            
            	bool "High Memory Support"

            
            	depends on MMU

            
            	help

            
            	  Linux can use the full amount of RAM in the system by

            
            	  default. However, the default MMUv2 setup only maps the

            
            	  lowermost 128 MB of memory linearly to the areas starting

            
            	  at 0xd0000000 (cached) and 0xd8000000 (uncached).

            
            	  When there are more than 128 MB memory in the system not

            
            	  all of it can be "permanently mapped" by the kernel.

            
            	  The physical memory that's not permanently mapped is called

            
            	  "high memory".


            	  If you are compiling a kernel which will never run on a

            
            	  machine with more than 128 MB total physical RAM, answer

            
            	  N here.


            	  If unsure, say Y.


            config FAST_SYSCALL_XTENSA

            
            	bool "Enable fast atomic syscalls"

            
            	default n

            
            	help

            
            	  fast_syscall_xtensa is a syscall that can make atomic operations

            
            	  on UP kernel when processor has no s32c1i support.


            	  This syscall is deprecated. It may have issues when called with

            
            	  invalid arguments. It is provided only for backwards compatibility.

            
            	  Only enable it if your userspace software requires it.


            	  If unsure, say N.


            config FAST_SYSCALL_SPILL_REGISTERS

            
            	bool "Enable spill registers syscall"

            
            	default n

            
            	help

            
            	  fast_syscall_spill_registers is a syscall that spills all active

            
            	  register windows of a calling userspace task onto its stack.


            	  This syscall is deprecated. It may have issues when called with

            
            	  invalid arguments. It is provided only for backwards compatibility.

            
            	  Only enable it if your userspace software requires it.


            	  If unsure, say N.


            endmenu


            config XTENSA_CALIBRATE_CCOUNT

            
            	def_bool n

            
            	help

            
            	  On some platforms (XT2000, for example), the CPU clock rate can

            
            	  vary.  The frequency can be determined, however, by measuring

            
            	  against a well known, fixed frequency, such as an UART oscillator.


            config SERIAL_CONSOLE

            
            	def_bool n


            menu "Bus options"


            config PCI

            
            	bool "PCI support"

            
            	default y

            
            	help

            
            	  Find out whether you have a PCI motherboard. PCI is the name of a

            
            	  bus system, i.e. the way the CPU talks to the other stuff inside

            
            	  your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or

            
            	  VESA. If you have PCI, say Y, otherwise N.


            source "drivers/pci/Kconfig"


            endmenu


            menu "Platform options"


            choice

            
            	prompt "Xtensa System Type"

            
            	default XTENSA_PLATFORM_ISS


            config XTENSA_PLATFORM_ISS

            
            	bool "ISS"

            
            	select XTENSA_CALIBRATE_CCOUNT

            
            	select SERIAL_CONSOLE

            
            	help

            
            	  ISS is an acronym for Tensilica's Instruction Set Simulator.


            config XTENSA_PLATFORM_XT2000

            
            	bool "XT2000"

            
            	select HAVE_IDE

            
            	help

            
            	  XT2000 is the name of Tensilica's feature-rich emulation platform.

            
            	  This hardware is capable of running a full Linux distribution.


            config XTENSA_PLATFORM_XTFPGA

            
            	bool "XTFPGA"

            
            	select ETHOC if ETHERNET

            
            	select PLATFORM_WANT_DEFAULT_MEM

            
            	select SERIAL_CONSOLE

            
            	select XTENSA_CALIBRATE_CCOUNT

            
            	help

            
            	  XTFPGA is the name of Tensilica board family (LX60, LX110, LX200, ML605).

            
            	  This hardware is capable of running a full Linux distribution.


            endchoice


            config XTENSA_CPU_CLOCK

            
            	int "CPU clock rate [MHz]"

            
            	depends on !XTENSA_CALIBRATE_CCOUNT

            
            	default 16


            config GENERIC_CALIBRATE_DELAY

            
            	bool "Auto calibration of the BogoMIPS value"

            
            	help

            
            	  The BogoMIPS value can easily be derived from the CPU frequency.


            config CMDLINE_BOOL

            
            	bool "Default bootloader kernel arguments"


            config CMDLINE

            
            	string "Initial kernel command string"

            
            	depends on CMDLINE_BOOL

            
            	default "console=ttyS0,38400 root=/dev/ram"

            
            	help

            
            	  On some architectures (EBSA110 and CATS), there is currently no way

            
            	  for the boot loader to pass arguments to the kernel. For these

            
            	  architectures, you should supply some command-line options at build

            
            	  time by entering them here. As a minimum, you should specify the

            
            	  memory size and the root device (e.g., mem=64M root=/dev/nfs).


            config USE_OF

            
            	bool "Flattened Device Tree support"

            
            	select OF

            
            	select OF_EARLY_FLATTREE

            
            	help

            
            	  Include support for flattened device tree machine descriptions.


            config BUILTIN_DTB

            
            	string "DTB to build into the kernel image"

            
            	depends on OF


            config BLK_DEV_SIMDISK

            
            	tristate "Host file-based simulated block device support"

            
            	default n

            
            	depends on XTENSA_PLATFORM_ISS && BLOCK

            
            	help

            
            	  Create block devices that map to files in the host file system.

            
            	  Device binding to host file may be changed at runtime via proc

            
            	  interface provided the device is not in use.


            config BLK_DEV_SIMDISK_COUNT

            
            	int "Number of host file-based simulated block devices"

            
            	range 1 10

            
            	depends on BLK_DEV_SIMDISK

            
            	default 2

            
            	help

            
            	  This is the default minimal number of created block devices.

            
            	  Kernel/module parameter 'simdisk_count' may be used to change this

            
            	  value at runtime. More file names (but no more than 10) may be

            
            	  specified as parameters, simdisk_count grows accordingly.


            config SIMDISK0_FILENAME

            
            	string "Host filename for the first simulated device"

            
            	depends on BLK_DEV_SIMDISK = y

            
            	default ""

            
            	help

            
            	  Attach a first simdisk to a host file. Conventionally, this file

            
            	  contains a root file system.


            config SIMDISK1_FILENAME

            
            	string "Host filename for the second simulated device"

            
            	depends on BLK_DEV_SIMDISK = y && BLK_DEV_SIMDISK_COUNT != 1

            
            	default ""

            
            	help

            
            	  Another simulated disk in a host file for a buildroot-independent

            
            	  storage.


            source "mm/Kconfig"


            source "drivers/pcmcia/Kconfig"


            source "drivers/pci/hotplug/Kconfig"


            config PLATFORM_WANT_DEFAULT_MEM

            
            	def_bool n


            config DEFAULT_MEM_START

            
            	hex "Physical address of the default memory area start"

            
            	depends on PLATFORM_WANT_DEFAULT_MEM

            
            	default 0x00000000 if MMU

            
            	default 0x40000000 if !MMU

            
            	help

            
            	  This is a fallback start address of the default memory area, it is

            
            	  used when no physical memory size is passed through DTB or through

            
            	  boot parameter from bootloader.


            	  In noMMU configuration the following parameters are derived from it:

            
            	  - kernel load address;

            
            	  - kernel entry point address;

            
            	  - relocatable vectors base address;

            
            	  - uBoot load address;

            
            	  - TASK_SIZE.


            	  If unsure, leave the default value here.


            config DEFAULT_MEM_SIZE

            
            	hex "Maximal size of the default memory area"

            
            	depends on PLATFORM_WANT_DEFAULT_MEM

            
            	default 0x04000000

            
            	help

            
            	  This is a fallback size of the default memory area, it is used when

            
            	  no physical memory size is passed through DTB or through boot

            
            	  parameter from bootloader.


            	  It's also used for TASK_SIZE calculation in noMMU configuration.


            	  If unsure, leave the default value here.


            config XTFPGA_LCD

            
            	bool "Enable XTFPGA LCD driver"

            
            	depends on XTENSA_PLATFORM_XTFPGA

            
            	default n

            
            	help

            
            	  There's a 2x16 LCD on most of XTFPGA boards, kernel may output

            
            	  progress messages there during bootup/shutdown. It may be useful

            
            	  during board bringup.


            	  If unsure, say N.


            config XTFPGA_LCD_BASE_ADDR

            
            	hex "XTFPGA LCD base address"

            
            	depends on XTFPGA_LCD

            
            	default "0x0d0c0000"

            
            	help

            
            	  Base address of the LCD controller inside KIO region.

            
            	  Different boards from XTFPGA family have LCD controller at different

            
            	  addresses. Please consult prototyping user guide for your board for

            
            	  the correct address. Wrong address here may lead to hardware lockup.


            config XTFPGA_LCD_8BIT_ACCESS

            
            	bool "Use 8-bit access to XTFPGA LCD"

            
            	depends on XTFPGA_LCD

            
            	default n

            
            	help

            
            	  LCD may be connected with 4- or 8-bit interface, 8-bit access may

            
            	  only be used with 8-bit interface. Please consult prototyping user

            
            	  guide for your board for the correct interface width.


            endmenu


            menu "Executable file formats"


            source "fs/Kconfig.binfmt"


            endmenu


            menu "Power management options"


            source "kernel/power/Kconfig"


            endmenu


            source "net/Kconfig"


            source "drivers/Kconfig"


            source "fs/Kconfig"


            source "arch/xtensa/Kconfig.debug"


            source "security/Kconfig"


            source "crypto/Kconfig"


            source "lib/Kconfig"
	config ZONE_DMA
	def_bool y

	config XTENSA
	def_bool y
	select ARCH_WANT_FRAME_POINTERS
	select ARCH_WANT_IPC_PARSE_VERSION
	select ARCH_WANT_OPTIONAL_GPIOLIB
	select BUILDTIME_EXTABLE_SORT
	select CLONE_BACKWARDS
	select COMMON_CLK
	select GENERIC_ATOMIC64
	select GENERIC_CLOCKEVENTS
	select GENERIC_IRQ_SHOW
	select GENERIC_PCI_IOMAP
	select GENERIC_SCHED_CLOCK
	select HAVE_DMA_API_DEBUG
	select HAVE_DMA_ATTRS
	select HAVE_FUNCTION_TRACER
	select HAVE_IRQ_TIME_ACCOUNTING
	select HAVE_OPROFILE
	select HAVE_PERF_EVENTS
	select IRQ_DOMAIN
	select MODULES_USE_ELF_RELA
	select PERF_USE_VMALLOC
	select VIRT_TO_BUS
	help
	Xtensa processors are 32-bit RISC machines designed by Tensilica
	primarily for embedded systems. These processors are both
	configurable and extensible. The Linux port to the Xtensa
	architecture supports all processor configurations and extensions,
	with reasonable minimum requirements. The Xtensa Linux project has
	a home page at <http://www.linux-xtensa.org/>.

	config RWSEM_XCHGADD_ALGORITHM
	def_bool y

	config GENERIC_HWEIGHT
	def_bool y

	config ARCH_HAS_ILOG2_U32
	def_bool n

	config ARCH_HAS_ILOG2_U64
	def_bool n

	config NO_IOPORT_MAP
	def_bool n

	config HZ
	int
	default 100

	source "init/Kconfig"
	source "kernel/Kconfig.freezer"

	config LOCKDEP_SUPPORT
	def_bool y

	config STACKTRACE_SUPPORT
	def_bool y

	config TRACE_IRQFLAGS_SUPPORT
	def_bool y

	config MMU
	def_bool n

	config VARIANT_IRQ_SWITCH
	def_bool n

	config HAVE_XTENSA_GPIO32
	def_bool n

	menu "Processor type and features"

	choice
	prompt "Xtensa Processor Configuration"
	default XTENSA_VARIANT_FSF

	config XTENSA_VARIANT_FSF
	bool "fsf - default (not generic) configuration"
	select MMU

	config XTENSA_VARIANT_DC232B
	bool "dc232b - Diamond 232L Standard Core Rev.B (LE)"
	select MMU
	select HAVE_XTENSA_GPIO32
	help
	This variant refers to Tensilica's Diamond 232L Standard core Rev.B (LE).

	config XTENSA_VARIANT_DC233C
	bool "dc233c - Diamond 233L Standard Core Rev.C (LE)"
	select MMU
	select HAVE_XTENSA_GPIO32
	help
	This variant refers to Tensilica's Diamond 233L Standard core Rev.C (LE).

	config XTENSA_VARIANT_CUSTOM
	bool "Custom Xtensa processor configuration"
	select HAVE_XTENSA_GPIO32
	help
	Select this variant to use a custom Xtensa processor configuration.
	You will be prompted for a processor variant CORENAME.
	endchoice

	config XTENSA_VARIANT_CUSTOM_NAME
	string "Xtensa Processor Custom Core Variant Name"
	depends on XTENSA_VARIANT_CUSTOM
	help
	Provide the name of a custom Xtensa processor variant.
	This CORENAME selects arch/xtensa/variant/CORENAME.
	Dont forget you have to select MMU if you have one.

	config XTENSA_VARIANT_NAME
	string
	default "dc232b" if XTENSA_VARIANT_DC232B
	default "dc233c" if XTENSA_VARIANT_DC233C
	default "fsf" if XTENSA_VARIANT_FSF
	default XTENSA_VARIANT_CUSTOM_NAME if XTENSA_VARIANT_CUSTOM

	config XTENSA_VARIANT_MMU
	bool "Core variant has a Full MMU (TLB, Pages, Protection, etc)"
	depends on XTENSA_VARIANT_CUSTOM
	default y
	select MMU
	help
	Build a Conventional Kernel with full MMU support,
	ie: it supports a TLB with auto-loading, page protection.

	config XTENSA_VARIANT_HAVE_PERF_EVENTS
	bool "Core variant has Performance Monitor Module"
	depends on XTENSA_VARIANT_CUSTOM
	default n
	help
	Enable if core variant has Performance Monitor Module with
	External Registers Interface.

	If unsure, say N.

	config XTENSA_UNALIGNED_USER
	bool "Unaligned memory access in use space"
	help
	The Xtensa architecture currently does not handle unaligned
	memory accesses in hardware but through an exception handler.
	Per default, unaligned memory accesses are disabled in user space.

	Say Y here to enable unaligned memory access in user space.

	source "kernel/Kconfig.preempt"

	config HAVE_SMP
	bool "System Supports SMP (MX)"
	depends on XTENSA_VARIANT_CUSTOM
	select XTENSA_MX
	help
	This option is use to indicate that the system-on-a-chip (SOC)
	supports Multiprocessing. Multiprocessor support implemented above
	the CPU core definition and currently needs to be selected manually.

	Multiprocessor support in implemented with external cache and
	interrupt controllers.

	The MX interrupt distributer adds Interprocessor Interrupts
	and causes the IRQ numbers to be increased by 4 for devices
	like the open cores ethernet driver and the serial interface.

	You still have to select "Enable SMP" to enable SMP on this SOC.

	config SMP
	bool "Enable Symmetric multi-processing support"
	depends on HAVE_SMP
	select GENERIC_SMP_IDLE_THREAD
	help
	Enabled SMP Software; allows more than one CPU/CORE
	to be activated during startup.

	config NR_CPUS
	depends on SMP
	int "Maximum number of CPUs (2-32)"
	range 2 32
	default "4"

	config HOTPLUG_CPU
	bool "Enable CPU hotplug support"
	depends on SMP
	help
	Say Y here to allow turning CPUs off and on. CPUs can be
	controlled through /sys/devices/system/cpu.

	Say N if you want to disable CPU hotplug.

	config INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX
	bool "Initialize Xtensa MMU inside the Linux kernel code"
	default y
	help
	Earlier version initialized the MMU in the exception vector
	before jumping to _startup in head.S and had an advantage that
	it was possible to place a software breakpoint at 'reset' and
	then enter your normal kernel breakpoints once the MMU was mapped
	to the kernel mappings (0XC0000000).

	This unfortunately doesn't work for U-Boot and likley also wont
	work for using KEXEC to have a hot kernel ready for doing a
	KDUMP.

	So now the MMU is initialized in head.S but it's necessary to
	use hardware breakpoints (gdb 'hbreak' cmd) to break at _startup.
	xt-gdb can't place a Software Breakpoint in the 0XD region prior
	to mapping the MMU and after mapping even if the area of low memory
	was mapped gdb wouldn't remove the breakpoint on hitting it as the
	PC wouldn't match. Since Hardware Breakpoints are recommended for
	Linux configurations it seems reasonable to just assume they exist
	and leave this older mechanism for unfortunate souls that choose
	not to follow Tensilica's recommendation.

	Selecting this will cause U-Boot to set the KERNEL Load and Entry
	address at 0x00003000 instead of the mapped std of 0xD0003000.

	If in doubt, say Y.

	config HIGHMEM
	bool "High Memory Support"
	depends on MMU
	help
	Linux can use the full amount of RAM in the system by
	default. However, the default MMUv2 setup only maps the
	lowermost 128 MB of memory linearly to the areas starting
	at 0xd0000000 (cached) and 0xd8000000 (uncached).
	When there are more than 128 MB memory in the system not
	all of it can be "permanently mapped" by the kernel.
	The physical memory that's not permanently mapped is called
	"high memory".

	If you are compiling a kernel which will never run on a
	machine with more than 128 MB total physical RAM, answer
	N here.

	If unsure, say Y.

	config FAST_SYSCALL_XTENSA
	bool "Enable fast atomic syscalls"
	default n
	help
	fast_syscall_xtensa is a syscall that can make atomic operations
	on UP kernel when processor has no s32c1i support.

	This syscall is deprecated. It may have issues when called with
	invalid arguments. It is provided only for backwards compatibility.
	Only enable it if your userspace software requires it.

	If unsure, say N.

	config FAST_SYSCALL_SPILL_REGISTERS
	bool "Enable spill registers syscall"
	default n
	help
	fast_syscall_spill_registers is a syscall that spills all active
	register windows of a calling userspace task onto its stack.

	This syscall is deprecated. It may have issues when called with
	invalid arguments. It is provided only for backwards compatibility.
	Only enable it if your userspace software requires it.

	If unsure, say N.

	endmenu

	config XTENSA_CALIBRATE_CCOUNT
	def_bool n
	help
	On some platforms (XT2000, for example), the CPU clock rate can
	vary. The frequency can be determined, however, by measuring
	against a well known, fixed frequency, such as an UART oscillator.

	config SERIAL_CONSOLE
	def_bool n

	menu "Bus options"

	config PCI
	bool "PCI support"
	default y
	help
	Find out whether you have a PCI motherboard. PCI is the name of a
	bus system, i.e. the way the CPU talks to the other stuff inside
	your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
	VESA. If you have PCI, say Y, otherwise N.

	source "drivers/pci/Kconfig"

	endmenu

	menu "Platform options"

	choice
	prompt "Xtensa System Type"
	default XTENSA_PLATFORM_ISS

	config XTENSA_PLATFORM_ISS
	bool "ISS"
	select XTENSA_CALIBRATE_CCOUNT
	select SERIAL_CONSOLE
	help
	ISS is an acronym for Tensilica's Instruction Set Simulator.

	config XTENSA_PLATFORM_XT2000
	bool "XT2000"
	select HAVE_IDE
	help
	XT2000 is the name of Tensilica's feature-rich emulation platform.
	This hardware is capable of running a full Linux distribution.

	config XTENSA_PLATFORM_XTFPGA
	bool "XTFPGA"
	select ETHOC if ETHERNET
	select PLATFORM_WANT_DEFAULT_MEM
	select SERIAL_CONSOLE
	select XTENSA_CALIBRATE_CCOUNT
	help
	XTFPGA is the name of Tensilica board family (LX60, LX110, LX200, ML605).
	This hardware is capable of running a full Linux distribution.

	endchoice


	config XTENSA_CPU_CLOCK
	int "CPU clock rate [MHz]"
	depends on !XTENSA_CALIBRATE_CCOUNT
	default 16

	config GENERIC_CALIBRATE_DELAY
	bool "Auto calibration of the BogoMIPS value"
	help
	The BogoMIPS value can easily be derived from the CPU frequency.

	config CMDLINE_BOOL
	bool "Default bootloader kernel arguments"

	config CMDLINE
	string "Initial kernel command string"
	depends on CMDLINE_BOOL
	default "console=ttyS0,38400 root=/dev/ram"
	help
	On some architectures (EBSA110 and CATS), there is currently no way
	for the boot loader to pass arguments to the kernel. For these
	architectures, you should supply some command-line options at build
	time by entering them here. As a minimum, you should specify the
	memory size and the root device (e.g., mem=64M root=/dev/nfs).

	config USE_OF
	bool "Flattened Device Tree support"
	select OF
	select OF_EARLY_FLATTREE
	help
	Include support for flattened device tree machine descriptions.

	config BUILTIN_DTB
	string "DTB to build into the kernel image"
	depends on OF

	config BLK_DEV_SIMDISK
	tristate "Host file-based simulated block device support"
	default n
	depends on XTENSA_PLATFORM_ISS && BLOCK
	help
	Create block devices that map to files in the host file system.
	Device binding to host file may be changed at runtime via proc
	interface provided the device is not in use.

	config BLK_DEV_SIMDISK_COUNT
	int "Number of host file-based simulated block devices"
	range 1 10
	depends on BLK_DEV_SIMDISK
	default 2
	help
	This is the default minimal number of created block devices.
	Kernel/module parameter 'simdisk_count' may be used to change this
	value at runtime. More file names (but no more than 10) may be
	specified as parameters, simdisk_count grows accordingly.

	config SIMDISK0_FILENAME
	string "Host filename for the first simulated device"
	depends on BLK_DEV_SIMDISK = y
	default ""
	help
	Attach a first simdisk to a host file. Conventionally, this file
	contains a root file system.

	config SIMDISK1_FILENAME
	string "Host filename for the second simulated device"
	depends on BLK_DEV_SIMDISK = y && BLK_DEV_SIMDISK_COUNT != 1
	default ""
	help
	Another simulated disk in a host file for a buildroot-independent
	storage.

	source "mm/Kconfig"

	source "drivers/pcmcia/Kconfig"

	source "drivers/pci/hotplug/Kconfig"

	config PLATFORM_WANT_DEFAULT_MEM
	def_bool n

	config DEFAULT_MEM_START
	hex "Physical address of the default memory area start"
	depends on PLATFORM_WANT_DEFAULT_MEM
	default 0x00000000 if MMU
	default 0x40000000 if !MMU
	help
	This is a fallback start address of the default memory area, it is
	used when no physical memory size is passed through DTB or through
	boot parameter from bootloader.

	In noMMU configuration the following parameters are derived from it:
	- kernel load address;
	- kernel entry point address;
	- relocatable vectors base address;
	- uBoot load address;
	- TASK_SIZE.

	If unsure, leave the default value here.

	config DEFAULT_MEM_SIZE
	hex "Maximal size of the default memory area"
	depends on PLATFORM_WANT_DEFAULT_MEM
	default 0x04000000
	help
	This is a fallback size of the default memory area, it is used when
	no physical memory size is passed through DTB or through boot
	parameter from bootloader.

	It's also used for TASK_SIZE calculation in noMMU configuration.

	If unsure, leave the default value here.

	config XTFPGA_LCD
	bool "Enable XTFPGA LCD driver"
	depends on XTENSA_PLATFORM_XTFPGA
	default n
	help
	There's a 2x16 LCD on most of XTFPGA boards, kernel may output
	progress messages there during bootup/shutdown. It may be useful
	during board bringup.

	If unsure, say N.

	config XTFPGA_LCD_BASE_ADDR
	hex "XTFPGA LCD base address"
	depends on XTFPGA_LCD
	default "0x0d0c0000"
	help
	Base address of the LCD controller inside KIO region.
	Different boards from XTFPGA family have LCD controller at different
	addresses. Please consult prototyping user guide for your board for
	the correct address. Wrong address here may lead to hardware lockup.

	config XTFPGA_LCD_8BIT_ACCESS
	bool "Use 8-bit access to XTFPGA LCD"
	depends on XTFPGA_LCD
	default n
	help
	LCD may be connected with 4- or 8-bit interface, 8-bit access may
	only be used with 8-bit interface. Please consult prototyping user
	guide for your board for the correct interface width.

	endmenu

	menu "Executable file formats"

	source "fs/Kconfig.binfmt"

	endmenu

	menu "Power management options"

	source "kernel/power/Kconfig"

	endmenu

	source "net/Kconfig"

	source "drivers/Kconfig"

	source "fs/Kconfig"

	source "arch/xtensa/Kconfig.debug"

	source "security/Kconfig"

	source "crypto/Kconfig"

	source "lib/Kconfig"