[net-next-2.6.git] / arch / xtensa / Kconfig

# For a description of the syntax of this configuration file,
# see Documentation/kbuild/config-language.txt.

mainmenu "Linux/Xtensa Kernel Configuration"

config FRAME_POINTER
	bool
	default n

config ZONE_DMA
	bool
	default y

config XTENSA
	bool
	default y
	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
	bool
	default y

config GENERIC_FIND_NEXT_BIT
	bool
	default y

config GENERIC_HWEIGHT
	bool
	default y

config GENERIC_HARDIRQS
	bool
	default y

config ARCH_HAS_ILOG2_U32
	bool
	default n

config ARCH_HAS_ILOG2_U64
	bool
	default n

source "init/Kconfig"

menu "Processor type and features"

choice
	prompt "Xtensa Processor Configuration"
	default XTENSA_VARIANT_FSF

config XTENSA_VARIANT_FSF
	bool "fsf"
endchoice

config MMU
	bool
	default y

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?

config HIGHMEM
	bool "High memory support"

endmenu

menu "Platform options"

choice
	prompt "Xtensa System Type"
	default XTENSA_PLATFORM_ISS

config XTENSA_PLATFORM_ISS
	bool "ISS"
	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.

endchoice


config XTENSA_CALIBRATE_CCOUNT
	bool "Auto calibration of the CPU clock rate"
	---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 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 SERIAL_CONSOLE
	bool
	depends on XTENSA_PLATFORM_ISS
	default y

config XTENSA_ISS_NETWORK
	bool
	depends on XTENSA_PLATFORM_ISS
	default y

source "mm/Kconfig"

endmenu

menu "Bus options"

config PCI
	bool "PCI support" if !XTENSA_PLATFORM_ISS
	depends on !XTENSA_PLATFORM_ISS
	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.

	  The PCI-HOWTO, available from
	  <http://www.linuxdoc.org/docs.html#howto>, contains valuable
	  information about which PCI hardware does work under Linux and which
	  doesn't

source "drivers/pci/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 KMOD, and build a modular kernel.  Get agent
	software (at <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
        bool
        depends on PROC_FS
        default y
        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"
Commit	Line	Data
8e1a6dd2 CZ	1	# For a description of the syntax of this configuration file,
	2	# see Documentation/kbuild/config-language.txt.
	3
	4	mainmenu "Linux/Xtensa Kernel Configuration"
	5
	6	config FRAME_POINTER
	7	bool
	8	default n
	9
66701b14 CL	10	config ZONE_DMA
	11	bool
	12	default y
	13
8e1a6dd2 CZ	14	config XTENSA
	15	bool
	16	default y
	17	help
	18	Xtensa processors are 32-bit RISC machines designed by Tensilica
	19	primarily for embedded systems. These processors are both
	20	configurable and extensible. The Linux port to the Xtensa
	21	architecture supports all processor configurations and extensions,
	22	with reasonable minimum requirements. The Xtensa Linux project has
	23	a home page at <http://xtensa.sourceforge.net/>.
	24
8e1a6dd2 CZ	25	config RWSEM_XCHGADD_ALGORITHM
	26	bool
	27	default y
	28
d4337aa5 AM	29	config GENERIC_FIND_NEXT_BIT
	30	bool
	31	default y
	32
	33	config GENERIC_HWEIGHT
	34	bool
	35	default y
	36
8e1a6dd2 CZ	37	config GENERIC_HARDIRQS
	38	bool
	39	default y
	40
f0d1b0b3 DH	41	config ARCH_HAS_ILOG2_U32
	42	bool
	43	default n
	44
	45	config ARCH_HAS_ILOG2_U64
	46	bool
	47	default n
	48
8e1a6dd2 CZ	49	source "init/Kconfig"
	50
	51	menu "Processor type and features"
	52
	53	choice
	54	prompt "Xtensa Processor Configuration"
173d6681	55	default XTENSA_VARIANT_FSF
8e1a6dd2	56
173d6681 CZ	57	config XTENSA_VARIANT_FSF
173d6681 CZ	58	bool "fsf"
8e1a6dd2 CZ	59	endchoice
	60
	61	config MMU
	62	bool
	63	default y
	64
	65	config XTENSA_UNALIGNED_USER
	66	bool "Unaligned memory access in use space"
	67	---help---
	68	The Xtensa architecture currently does not handle unaligned
	69	memory accesses in hardware but through an exception handler.
	70	Per default, unaligned memory accesses are disabled in user space.
	71
	72	Say Y here to enable unaligned memory access in user space.
	73
	74	config PREEMPT
	75	bool "Preemptible Kernel"
	76	---help---
	77	This option reduces the latency of the kernel when reacting to
	78	real-time or interactive events by allowing a low priority process to
	79	be preempted even if it is in kernel mode executing a system call.
	80	Unfortunately the kernel code has some race conditions if both
	81	CONFIG_SMP and CONFIG_PREEMPT are enabled, so this option is
	82	currently disabled if you are building an SMP kernel.
	83
	84	Say Y here if you are building a kernel for a desktop, embedded
	85	or real-time system. Say N if you are unsure.
	86
	87	config MATH_EMULATION
	88	bool "Math emulation"
	89	help
	90	Can we use information of configuration file?
	91
	92	config HIGHMEM
	93	bool "High memory support"
	94
	95	endmenu
	96
	97	menu "Platform options"
	98
	99	choice
	100	prompt "Xtensa System Type"
	101	default XTENSA_PLATFORM_ISS
	102
	103	config XTENSA_PLATFORM_ISS
	104	bool "ISS"
	105	help
	106	ISS is an acronym for Tensilica's Instruction Set Simulator.
	107
	108	config XTENSA_PLATFORM_XT2000
	109	bool "XT2000"
	110	help
	111	XT2000 is the name of Tensilica's feature-rich emulation platform.
	112	This hardware is capable of running a full Linux distribution.
	113
	114	endchoice
	115
	116
	117	config XTENSA_CALIBRATE_CCOUNT
	118	bool "Auto calibration of the CPU clock rate"
	119	---help---
	120	On some platforms (XT2000, for example), the CPU clock rate can
	121	vary. The frequency can be determined, however, by measuring
	122	against a well known, fixed frequency, such as an UART oscillator.
123
124	config XTENSA_CPU_CLOCK
125	int "CPU clock rate [MHz]"
126	depends on !XTENSA_CALIBRATE_CCOUNT
127	default "16"
128
129	config GENERIC_CALIBRATE_DELAY
130	bool "Auto calibration of the BogoMIPS value"
131	---help---
82300bf4	132	The BogoMIPS value can easily be derived from the CPU frequency.
8e1a6dd2 CZ	133
	134	config CMDLINE_BOOL
	135	bool "Default bootloader kernel arguments"
	136
	137	config CMDLINE
	138	string "Initial kernel command string"
	139	depends on CMDLINE_BOOL
	140	default "console=ttyS0,38400 root=/dev/ram"
	141	help
	142	On some architectures (EBSA110 and CATS), there is currently no way
	143	for the boot loader to pass arguments to the kernel. For these
	144	architectures, you should supply some command-line options at build
	145	time by entering them here. As a minimum, you should specify the
	146	memory size and the root device (e.g., mem=64M root=/dev/nfs).
	147
	148	config SERIAL_CONSOLE
	149	bool
	150	depends on XTENSA_PLATFORM_ISS
	151	default y
	152
	153	config XTENSA_ISS_NETWORK
	154	bool
	155	depends on XTENSA_PLATFORM_ISS
	156	default y
	157
82300bf4 CZ	158	source "mm/Kconfig"
82300bf4 CZ	159
8e1a6dd2 CZ	160	endmenu
	161
	162	menu "Bus options"
	163
	164	config PCI
	165	bool "PCI support" if !XTENSA_PLATFORM_ISS
	166	depends on !XTENSA_PLATFORM_ISS
	167	default y
	168	help
	169	Find out whether you have a PCI motherboard. PCI is the name of a
	170	bus system, i.e. the way the CPU talks to the other stuff inside
	171	your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
	172	VESA. If you have PCI, say Y, otherwise N.
	173
	174	The PCI-HOWTO, available from
	175	<http://www.linuxdoc.org/docs.html#howto>, contains valuable
	176	information about which PCI hardware does work under Linux and which
	177	doesn't
	178
	179	source "drivers/pci/Kconfig"
	180
	181	config HOTPLUG
	182
	183	bool "Support for hot-pluggable devices"
	184	---help---
	185	Say Y here if you want to plug devices into your computer while
	186	the system is running, and be able to use them quickly. In many
	187	cases, the devices can likewise be unplugged at any time too.
	188
	189	One well known example of this is PCMCIA- or PC-cards, credit-card
	190	size devices such as network cards, modems or hard drives which are
	191	plugged into slots found on all modern laptop computers. Another
	192	example, used on modern desktops as well as laptops, is USB.
	193
	194	Enable HOTPLUG and KMOD, and build a modular kernel. Get agent
	195	software (at <http://linux-hotplug.sourceforge.net/>) and install it.
	196	Then your kernel will automatically call out to a user mode "policy
	197	agent" (/sbin/hotplug) to load modules and set up software needed
	198	to use devices as you hotplug them.
	199
	200	source "drivers/pcmcia/Kconfig"
	201
	202	source "drivers/pci/hotplug/Kconfig"
	203
	204	endmenu
	205
cab00891	206	menu "Executable file formats"
8e1a6dd2 CZ	207
	208	# only elf supported
	209	config KCORE_ELF
	210	bool
	211	depends on PROC_FS
	212	default y
	213	help
	214	If you enabled support for /proc file system then the file
	215	/proc/kcore will contain the kernel core image in ELF format. This
	216	can be used in gdb:
	217
	218	$ cd /usr/src/linux ; gdb vmlinux /proc/kcore
	219
	220	This is especially useful if you have compiled the kernel with the
	221	"-g" option to preserve debugging information. It is mainly used
	222	for examining kernel data structures on the live kernel.
	223
	224	source "fs/Kconfig.binfmt"
	225
	226	endmenu
	227
d5950b43 SR	228	source "net/Kconfig"
d5950b43 SR	229
8e1a6dd2 CZ	230	source "drivers/Kconfig"
	231
	232	source "fs/Kconfig"
	233
	234	menu "Xtensa initrd options"
	235	depends on BLK_DEV_INITRD
	236
	237	config EMBEDDED_RAMDISK
	238	bool "Embed root filesystem ramdisk into the kernel"
	239
	240	config EMBEDDED_RAMDISK_IMAGE
cab00891	241	string "Filename of gzipped ramdisk image"
8e1a6dd2 CZ	242	depends on EMBEDDED_RAMDISK
	243	default "ramdisk.gz"
	244	help
	245	This is the filename of the ramdisk image to be built into the
	246	kernel. Relative pathnames are relative to arch/xtensa/boot/ramdisk/.
	247	The ramdisk image is not part of the kernel distribution; you must
	248	provide one yourself.
	249	endmenu
	250
	251	source "arch/xtensa/Kconfig.debug"
	252
	253	source "security/Kconfig"
	254
	255	source "crypto/Kconfig"
	256
	257	source "lib/Kconfig"
	258
	259