arch/xtensa/Kconfig - kernel/msm - Gitiles

 config FRAME_POINTER
 	def_bool n

 config ZONE_DMA
 	def_bool y

 config XTENSA
 	def_bool y
 	select HAVE_IDE
 	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://xtensa.sourceforge.net/>.

 config RWSEM_XCHGADD_ALGORITHM
 	def_bool y

 config GENERIC_FIND_NEXT_BIT
 	def_bool y

 config GENERIC_HWEIGHT
 	def_bool y

 config GENERIC_HARDIRQS
 	def_bool y

 config GENERIC_GPIO
 	def_bool y

 config ARCH_HAS_ILOG2_U32
 	def_bool n

 config ARCH_HAS_ILOG2_U64
 	def_bool n

 config NO_IOPORT
 	def_bool y

 config HZ
 	int
 	default 100

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

 config MMU
 	def_bool n

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

 config XTENSA_VARIANT_S6000
 	bool "s6000 - Stretch software configurable processor"
 	select VARIANT_IRQ_SWITCH
 	select ARCH_REQUIRE_GPIOLIB
 	select XTENSA_CALIBRATE_CCOUNT
 endchoice

 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.

 config PREEMPT
 	bool "Preemptible Kernel"
 	help
           This option reduces the latency of the kernel when reacting to
           real-time or interactive events by allowing a low priority process to
           be preempted even if it is in kernel mode executing a system call.
           Unfortunately the kernel code has some race conditions if both
           CONFIG_SMP and CONFIG_PREEMPT are enabled, so this option is
           currently disabled if you are building an SMP kernel.

           Say Y here if you are building a kernel for a desktop, embedded
           or real-time system.  Say N if you are unsure.

 config MATH_EMULATION
 	bool "Math emulation"
 	help
 	Can we use information of configuration file?

 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

 config XTENSA_ISS_NETWORK
 	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
 	select XTENSA_ISS_NETWORK
 	help
 	  ISS is an acronym for Tensilica's Instruction Set Simulator.

 config XTENSA_PLATFORM_XT2000
 	bool "XT2000"
 	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_S6105
 	bool "S6105"
 	select SERIAL_CONSOLE

 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).

 source "mm/Kconfig"

 config HOTPLUG
 	bool "Support for hot-pluggable devices"
 	help
 	  Say Y here if you want to plug devices into your computer while
 	  the system is running, and be able to use them quickly.  In many
 	  cases, the devices can likewise be unplugged at any time too.

 	  One well known example of this is PCMCIA- or PC-cards, credit-card
 	  size devices such as network cards, modems or hard drives which are
 	  plugged into slots found on all modern laptop computers.  Another
 	  example, used on modern desktops as well as laptops, is USB.

 	  Enable HOTPLUG and build a modular kernel.  Get agent software
 	  (from <http://linux-hotplug.sourceforge.net/>) and install it.
 	  Then your kernel will automatically call out to a user mode "policy
 	  agent" (/sbin/hotplug) to load modules and set up software needed
 	  to use devices as you hotplug them.

 source "drivers/pcmcia/Kconfig"

 source "drivers/pci/hotplug/Kconfig"

 endmenu

 menu "Executable file formats"

 # only elf supported
 config KCORE_ELF
 	def_bool y
         depends on PROC_FS
         help
           If you enabled support for /proc file system then the file
           /proc/kcore will contain the kernel core image in ELF format. This
           can be used in gdb:

           $ cd /usr/src/linux ; gdb vmlinux /proc/kcore

           This is especially useful if you have compiled the kernel with the
           "-g" option to preserve debugging information. It is mainly used
 	  for examining kernel data structures on the live kernel.

 source "fs/Kconfig.binfmt"

 endmenu

 source "net/Kconfig"

 source "drivers/Kconfig"

 source "fs/Kconfig"

 menu "Xtensa initrd options"
 	depends on BLK_DEV_INITRD

 config EMBEDDED_RAMDISK
 	bool "Embed root filesystem ramdisk into the kernel"

 config EMBEDDED_RAMDISK_IMAGE
 	string "Filename of gzipped ramdisk image"
 	depends on EMBEDDED_RAMDISK
 	default "ramdisk.gz"
 	help
 	  This is the filename of the ramdisk image to be built into the
 	  kernel.  Relative pathnames are relative to arch/xtensa/boot/ramdisk/.
 	  The ramdisk image is not part of the kernel distribution; you must
 	  provide one yourself.
 endmenu

 source "arch/xtensa/Kconfig.debug"

 source "security/Kconfig"

 source "crypto/Kconfig"

 source "lib/Kconfig"
	config FRAME_POINTER
	def_bool n

	config ZONE_DMA
	def_bool y

	config XTENSA
	def_bool y
	select HAVE_IDE
	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://xtensa.sourceforge.net/>.

	config RWSEM_XCHGADD_ALGORITHM
	def_bool y

	config GENERIC_FIND_NEXT_BIT
	def_bool y

	config GENERIC_HWEIGHT
	def_bool y

	config GENERIC_HARDIRQS
	def_bool y

	config GENERIC_GPIO
	def_bool y

	config ARCH_HAS_ILOG2_U32
	def_bool n

	config ARCH_HAS_ILOG2_U64
	def_bool n

	config NO_IOPORT
	def_bool y

	config HZ
	int
	default 100

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

	config MMU
	def_bool n

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

	config XTENSA_VARIANT_S6000
	bool "s6000 - Stretch software configurable processor"
	select VARIANT_IRQ_SWITCH
	select ARCH_REQUIRE_GPIOLIB
	select XTENSA_CALIBRATE_CCOUNT
	endchoice

	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.

	config PREEMPT
	bool "Preemptible Kernel"
	help
	This option reduces the latency of the kernel when reacting to
	real-time or interactive events by allowing a low priority process to
	be preempted even if it is in kernel mode executing a system call.
	Unfortunately the kernel code has some race conditions if both
	CONFIG_SMP and CONFIG_PREEMPT are enabled, so this option is
	currently disabled if you are building an SMP kernel.

	Say Y here if you are building a kernel for a desktop, embedded
	or real-time system. Say N if you are unsure.

	config MATH_EMULATION
	bool "Math emulation"
	help
	Can we use information of configuration file?

	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

	config XTENSA_ISS_NETWORK
	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
	select XTENSA_ISS_NETWORK
	help
	ISS is an acronym for Tensilica's Instruction Set Simulator.

	config XTENSA_PLATFORM_XT2000
	bool "XT2000"
	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_S6105
	bool "S6105"
	select SERIAL_CONSOLE

	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).

	source "mm/Kconfig"

	config HOTPLUG
	bool "Support for hot-pluggable devices"
	help
	Say Y here if you want to plug devices into your computer while
	the system is running, and be able to use them quickly. In many
	cases, the devices can likewise be unplugged at any time too.

	One well known example of this is PCMCIA- or PC-cards, credit-card
	size devices such as network cards, modems or hard drives which are
	plugged into slots found on all modern laptop computers. Another
	example, used on modern desktops as well as laptops, is USB.

	Enable HOTPLUG and build a modular kernel. Get agent software
	(from <http://linux-hotplug.sourceforge.net/>) and install it.
	Then your kernel will automatically call out to a user mode "policy
	agent" (/sbin/hotplug) to load modules and set up software needed
	to use devices as you hotplug them.

	source "drivers/pcmcia/Kconfig"

	source "drivers/pci/hotplug/Kconfig"

	endmenu

	menu "Executable file formats"

	# only elf supported
	config KCORE_ELF
	def_bool y
	depends on PROC_FS
	help
	If you enabled support for /proc file system then the file
	/proc/kcore will contain the kernel core image in ELF format. This
	can be used in gdb:

	$ cd /usr/src/linux ; gdb vmlinux /proc/kcore

	This is especially useful if you have compiled the kernel with the
	"-g" option to preserve debugging information. It is mainly used
	for examining kernel data structures on the live kernel.

	source "fs/Kconfig.binfmt"

	endmenu

	source "net/Kconfig"

	source "drivers/Kconfig"

	source "fs/Kconfig"

	menu "Xtensa initrd options"
	depends on BLK_DEV_INITRD

	config EMBEDDED_RAMDISK
	bool "Embed root filesystem ramdisk into the kernel"

	config EMBEDDED_RAMDISK_IMAGE
	string "Filename of gzipped ramdisk image"
	depends on EMBEDDED_RAMDISK
	default "ramdisk.gz"
	help
	This is the filename of the ramdisk image to be built into the
	kernel. Relative pathnames are relative to arch/xtensa/boot/ramdisk/.
	The ramdisk image is not part of the kernel distribution; you must
	provide one yourself.
	endmenu

	source "arch/xtensa/Kconfig.debug"

	source "security/Kconfig"

	source "crypto/Kconfig"

	source "lib/Kconfig"