drivers/mtd/devices/Kconfig - maze/linux - Git at Google

 menu "Self-contained MTD device drivers"
 	depends on MTD!=n

 config MTD_PMC551
 	tristate "Ramix PMC551 PCI Mezzanine RAM card support"
 	depends on PCI
 	---help---
 	  This provides a MTD device driver for the Ramix PMC551 RAM PCI card
 	  from Ramix Inc. <http://www.ramix.com/products/memory/pmc551.html>.
 	  These devices come in memory configurations from 32M - 1G.  If you
 	  have one, you probably want to enable this.

 	  If this driver is compiled as a module you get the ability to select
 	  the size of the aperture window pointing into the devices memory.
 	  What this means is that if you have a 1G card, normally the kernel
 	  will use a 1G memory map as its view of the device.  As a module,
 	  you can select a 1M window into the memory and the driver will
 	  "slide" the window around the PMC551's memory.  This was
 	  particularly useful on the 2.2 kernels on PPC architectures as there
 	  was limited kernel space to deal with.

 config MTD_PMC551_BUGFIX
 	bool "PMC551 256M DRAM Bugfix"
 	depends on MTD_PMC551
 	help
 	  Some of Ramix's PMC551 boards with 256M configurations have invalid
 	  column and row mux values.  This option will fix them, but will
 	  break other memory configurations.  If unsure say N.

 config MTD_PMC551_DEBUG
 	bool "PMC551 Debugging"
 	depends on MTD_PMC551
 	help
 	  This option makes the PMC551 more verbose during its operation and
 	  is only really useful if you are developing on this driver or
 	  suspect a possible hardware or driver bug.  If unsure say N.

 config MTD_MS02NV
 	tristate "DEC MS02-NV NVRAM module support"
 	depends on MACH_DECSTATION
 	help
 	  This is an MTD driver for the DEC's MS02-NV (54-20948-01) battery
 	  backed-up NVRAM module.  The module was originally meant as an NFS
 	  accelerator.  Say Y here if you have a DECstation 5000/2x0 or a
 	  DECsystem 5900 equipped with such a module.

 	  If you want to compile this driver as a module ( = code which can be
 	  inserted in and removed from the running kernel whenever you want),
 	  say M here and read <file:Documentation/kbuild/modules.txt>.
 	  The module will be called ms02-nv.

 config MTD_DATAFLASH
 	tristate "Support for AT45xxx DataFlash"
 	depends on SPI_MASTER && EXPERIMENTAL
 	help
 	  This enables access to AT45xxx DataFlash chips, using SPI.
 	  Sometimes DataFlash chips are packaged inside MMC-format
 	  cards; at this writing, the MMC stack won't handle those.

 config MTD_DATAFLASH_WRITE_VERIFY
 	bool "Verify DataFlash page writes"
 	depends on MTD_DATAFLASH
 	help
 	  This adds an extra check when data is written to the flash.
 	  It may help if you are verifying chip setup (timings etc) on
 	  your board.  There is a rare possibility that even though the
 	  device thinks the write was successful, a bit could have been
 	  flipped accidentally due to device wear or something else.

 config MTD_DATAFLASH_OTP
 	bool "DataFlash OTP support (Security Register)"
 	depends on MTD_DATAFLASH
 	select HAVE_MTD_OTP
 	help
 	  Newer DataFlash chips (revisions C and D) support 128 bytes of
 	  one-time-programmable (OTP) data.  The first half may be written
 	  (once) with up to 64 bytes of data, such as a serial number or
 	  other key product data.  The second half is programmed with a
 	  unique-to-each-chip bit pattern at the factory.

 config MTD_M25P80
 	tristate "Support most SPI Flash chips (AT26DF, M25P, W25X, ...)"
 	depends on SPI_MASTER && EXPERIMENTAL
 	help
 	  This enables access to most modern SPI flash chips, used for
 	  program and data storage.   Series supported include Atmel AT26DF,
 	  Spansion S25SL, SST 25VF, ST M25P, and Winbond W25X.  Other chips
 	  are supported as well.  See the driver source for the current list,
 	  or to add other chips.

 	  Note that the original DataFlash chips (AT45 series, not AT26DF),
 	  need an entirely different driver.

 	  Set up your spi devices with the right board-specific platform data,
 	  if you want to specify device partitioning or to use a device which
 	  doesn't support the JEDEC ID instruction.

 config M25PXX_USE_FAST_READ
 	bool "Use FAST_READ OPCode allowing SPI CLK <= 50MHz"
 	depends on MTD_M25P80
 	default y
 	help
 	  This option enables FAST_READ access supported by ST M25Pxx.

 config MTD_SST25L
 	tristate "Support SST25L (non JEDEC) SPI Flash chips"
 	depends on SPI_MASTER
 	help
 	  This enables access to the non JEDEC SST25L SPI flash chips, used
 	  for program and data storage.

 	  Set up your spi devices with the right board-specific platform data,
 	  if you want to specify device partitioning.

 config MTD_SLRAM
 	tristate "Uncached system RAM"
 	help
 	  If your CPU cannot cache all of the physical memory in your machine,
 	  you can still use it for storage or swap by using this driver to
 	  present it to the system as a Memory Technology Device.

 config MTD_PHRAM
 	tristate "Physical system RAM"
 	help
 	  This is a re-implementation of the slram driver above.

 	  Use this driver to access physical memory that the kernel proper
 	  doesn't have access to, memory beyond the mem=xxx limit, nvram,
 	  memory on the video card, etc...

 config MTD_LART
 	tristate "28F160xx flash driver for LART"
 	depends on SA1100_LART
 	help
 	  This enables the flash driver for LART. Please note that you do
 	  not need any mapping/chip driver for LART. This one does it all
 	  for you, so go disable all of those if you enabled some of them (:

 config MTD_MTDRAM
 	tristate "Test driver using RAM"
 	help
 	  This enables a test MTD device driver which uses vmalloc() to
 	  provide storage.  You probably want to say 'N' unless you're
 	  testing stuff.

 config MTDRAM_TOTAL_SIZE
 	int "MTDRAM device size in KiB"
 	depends on MTD_MTDRAM
 	default "4096"
 	help
 	  This allows you to configure the total size of the MTD device
 	  emulated by the MTDRAM driver.  If the MTDRAM driver is built
 	  as a module, it is also possible to specify this as a parameter when
 	  loading the module.

 config MTDRAM_ERASE_SIZE
 	int "MTDRAM erase block size in KiB"
 	depends on MTD_MTDRAM
 	default "128"
 	help
 	  This allows you to configure the size of the erase blocks in the
 	  device emulated by the MTDRAM driver.  If the MTDRAM driver is built
 	  as a module, it is also possible to specify this as a parameter when
 	  loading the module.

 #If not a module (I don't want to test it as a module)
 config MTDRAM_ABS_POS
 	hex "SRAM Hexadecimal Absolute position or 0"
 	depends on MTD_MTDRAM=y
 	default "0"
 	help
 	  If you have system RAM accessible by the CPU but not used by Linux
 	  in normal operation, you can give the physical address at which the
 	  available RAM starts, and the MTDRAM driver will use it instead of
 	  allocating space from Linux's available memory. Otherwise, leave
 	  this set to zero. Most people will want to leave this as zero.

 config MTD_BLOCK2MTD
 	tristate "MTD using block device"
 	depends on BLOCK
 	help
 	  This driver allows a block device to appear as an MTD. It would
 	  generally be used in the following cases:

 	  Using Compact Flash as an MTD, these usually present themselves to
 	  the system as an ATA drive.
 	  Testing MTD users (eg JFFS2) on large media and media that might
 	  be removed during a write (using the floppy drive).

 comment "Disk-On-Chip Device Drivers"

 config MTD_DOC2000
 	tristate "M-Systems Disk-On-Chip 2000 and Millennium (DEPRECATED)"
 	depends on MTD_NAND
 	select MTD_DOCPROBE
 	select MTD_NAND_IDS
 	---help---
 	  This provides an MTD device driver for the M-Systems DiskOnChip
 	  2000 and Millennium devices.  Originally designed for the DiskOnChip
 	  2000, it also now includes support for the DiskOnChip Millennium.
 	  If you have problems with this driver and the DiskOnChip Millennium,
 	  you may wish to try the alternative Millennium driver below. To use
 	  the alternative driver, you will need to undefine DOC_SINGLE_DRIVER
 	  in the <file:drivers/mtd/devices/docprobe.c> source code.

 	  If you use this device, you probably also want to enable the NFTL
 	  'NAND Flash Translation Layer' option below, which is used to
 	  emulate a block device by using a kind of file system on the flash
 	  chips.

 	  NOTE: This driver is deprecated and will probably be removed soon.
 	  Please try the new DiskOnChip driver under "NAND Flash Device
 	  Drivers".

 config MTD_DOC2001
 	tristate "M-Systems Disk-On-Chip Millennium-only alternative driver (DEPRECATED)"
 	depends on MTD_NAND
 	select MTD_DOCPROBE
 	select MTD_NAND_IDS
 	---help---
 	  This provides an alternative MTD device driver for the M-Systems
 	  DiskOnChip Millennium devices.  Use this if you have problems with
 	  the combined DiskOnChip 2000 and Millennium driver above.  To get
 	  the DiskOnChip probe code to load and use this driver instead of
 	  the other one, you will need to undefine DOC_SINGLE_DRIVER near
 	  the beginning of <file:drivers/mtd/devices/docprobe.c>.

 	  If you use this device, you probably also want to enable the NFTL
 	  'NAND Flash Translation Layer' option below, which is used to
 	  emulate a block device by using a kind of file system on the flash
 	  chips.

 	  NOTE: This driver is deprecated and will probably be removed soon.
 	  Please try the new DiskOnChip driver under "NAND Flash Device
 	  Drivers".

 config MTD_DOC2001PLUS
 	tristate "M-Systems Disk-On-Chip Millennium Plus"
 	depends on MTD_NAND
 	select MTD_DOCPROBE
 	select MTD_NAND_IDS
 	---help---
 	  This provides an MTD device driver for the M-Systems DiskOnChip
 	  Millennium Plus devices.

 	  If you use this device, you probably also want to enable the INFTL
 	  'Inverse NAND Flash Translation Layer' option below, which is used
 	  to emulate a block device by using a kind of file system on the
 	  flash chips.

 	  NOTE: This driver will soon be replaced by the new DiskOnChip driver
 	  under "NAND Flash Device Drivers" (currently that driver does not
 	  support all Millennium Plus devices).

 config MTD_DOCG3
 	tristate "M-Systems Disk-On-Chip G3"
 	select BCH
 	select BCH_CONST_PARAMS
 	---help---
 	  This provides an MTD device driver for the M-Systems DiskOnChip
 	  G3 devices.

 	  The driver provides access to G3 DiskOnChip, distributed by
 	  M-Systems and now Sandisk. The support is very experimental,
 	  and doesn't give access to any write operations.

 if MTD_DOCG3
 config BCH_CONST_M
 	default 14
 config BCH_CONST_T
 	default 4
 endif

 config MTD_DOCPROBE
 	tristate
 	select MTD_DOCECC

 config MTD_DOCECC
 	tristate

 config MTD_DOCPROBE_ADVANCED
 	bool "Advanced detection options for DiskOnChip"
 	depends on MTD_DOCPROBE
 	help
 	  This option allows you to specify nonstandard address at which to
 	  probe for a DiskOnChip, or to change the detection options.  You
 	  are unlikely to need any of this unless you are using LinuxBIOS.
 	  Say 'N'.

 config MTD_DOCPROBE_ADDRESS
 	hex "Physical address of DiskOnChip" if MTD_DOCPROBE_ADVANCED
 	depends on MTD_DOCPROBE
 	default "0x0"
 	---help---
 	  By default, the probe for DiskOnChip devices will look for a
 	  DiskOnChip at every multiple of 0x2000 between 0xC8000 and 0xEE000.
 	  This option allows you to specify a single address at which to probe
 	  for the device, which is useful if you have other devices in that
 	  range which get upset when they are probed.

 	  (Note that on PowerPC, the normal probe will only check at
 	  0xE4000000.)

 	  Normally, you should leave this set to zero, to allow the probe at
 	  the normal addresses.

 config MTD_DOCPROBE_HIGH
 	bool "Probe high addresses"
 	depends on MTD_DOCPROBE_ADVANCED
 	help
 	  By default, the probe for DiskOnChip devices will look for a
 	  DiskOnChip at every multiple of 0x2000 between 0xC8000 and 0xEE000.
 	  This option changes to make it probe between 0xFFFC8000 and
 	  0xFFFEE000.  Unless you are using LinuxBIOS, this is unlikely to be
 	  useful to you.  Say 'N'.

 config MTD_DOCPROBE_55AA
 	bool "Probe for 0x55 0xAA BIOS Extension Signature"
 	depends on MTD_DOCPROBE_ADVANCED
 	help
 	  Check for the 0x55 0xAA signature of a DiskOnChip, and do not
 	  continue with probing if it is absent.  The signature will always be
 	  present for a DiskOnChip 2000 or a normal DiskOnChip Millennium.
 	  Only if you have overwritten the first block of a DiskOnChip
 	  Millennium will it be absent.  Enable this option if you are using
 	  LinuxBIOS or if you need to recover a DiskOnChip Millennium on which
 	  you have managed to wipe the first block.

 endmenu
	menu "Self-contained MTD device drivers"
	depends on MTD!=n

	config MTD_PMC551
	tristate "Ramix PMC551 PCI Mezzanine RAM card support"
	depends on PCI
	---help---
	This provides a MTD device driver for the Ramix PMC551 RAM PCI card
	from Ramix Inc. <http://www.ramix.com/products/memory/pmc551.html>.
	These devices come in memory configurations from 32M - 1G. If you
	have one, you probably want to enable this.

	If this driver is compiled as a module you get the ability to select
	the size of the aperture window pointing into the devices memory.
	What this means is that if you have a 1G card, normally the kernel
	will use a 1G memory map as its view of the device. As a module,
	you can select a 1M window into the memory and the driver will
	"slide" the window around the PMC551's memory. This was
	particularly useful on the 2.2 kernels on PPC architectures as there
	was limited kernel space to deal with.

	config MTD_PMC551_BUGFIX
	bool "PMC551 256M DRAM Bugfix"
	depends on MTD_PMC551
	help
	Some of Ramix's PMC551 boards with 256M configurations have invalid
	column and row mux values. This option will fix them, but will
	break other memory configurations. If unsure say N.

	config MTD_PMC551_DEBUG
	bool "PMC551 Debugging"
	depends on MTD_PMC551
	help
	This option makes the PMC551 more verbose during its operation and
	is only really useful if you are developing on this driver or
	suspect a possible hardware or driver bug. If unsure say N.

	config MTD_MS02NV
	tristate "DEC MS02-NV NVRAM module support"
	depends on MACH_DECSTATION
	help
	This is an MTD driver for the DEC's MS02-NV (54-20948-01) battery
	backed-up NVRAM module. The module was originally meant as an NFS
	accelerator. Say Y here if you have a DECstation 5000/2x0 or a
	DECsystem 5900 equipped with such a module.

	If you want to compile this driver as a module ( = code which can be
	inserted in and removed from the running kernel whenever you want),
	say M here and read <file:Documentation/kbuild/modules.txt>.
	The module will be called ms02-nv.

	config MTD_DATAFLASH
	tristate "Support for AT45xxx DataFlash"
	depends on SPI_MASTER && EXPERIMENTAL
	help
	This enables access to AT45xxx DataFlash chips, using SPI.
	Sometimes DataFlash chips are packaged inside MMC-format
	cards; at this writing, the MMC stack won't handle those.

	config MTD_DATAFLASH_WRITE_VERIFY
	bool "Verify DataFlash page writes"
	depends on MTD_DATAFLASH
	help
	This adds an extra check when data is written to the flash.
	It may help if you are verifying chip setup (timings etc) on
	your board. There is a rare possibility that even though the
	device thinks the write was successful, a bit could have been
	flipped accidentally due to device wear or something else.

	config MTD_DATAFLASH_OTP
	bool "DataFlash OTP support (Security Register)"
	depends on MTD_DATAFLASH
	select HAVE_MTD_OTP
	help
	Newer DataFlash chips (revisions C and D) support 128 bytes of
	one-time-programmable (OTP) data. The first half may be written
	(once) with up to 64 bytes of data, such as a serial number or
	other key product data. The second half is programmed with a
	unique-to-each-chip bit pattern at the factory.

	config MTD_M25P80
	tristate "Support most SPI Flash chips (AT26DF, M25P, W25X, ...)"
	depends on SPI_MASTER && EXPERIMENTAL
	help
	This enables access to most modern SPI flash chips, used for
	program and data storage. Series supported include Atmel AT26DF,
	Spansion S25SL, SST 25VF, ST M25P, and Winbond W25X. Other chips
	are supported as well. See the driver source for the current list,
	or to add other chips.

	Note that the original DataFlash chips (AT45 series, not AT26DF),
	need an entirely different driver.

	Set up your spi devices with the right board-specific platform data,
	if you want to specify device partitioning or to use a device which
	doesn't support the JEDEC ID instruction.

	config M25PXX_USE_FAST_READ
	bool "Use FAST_READ OPCode allowing SPI CLK <= 50MHz"
	depends on MTD_M25P80
	default y
	help
	This option enables FAST_READ access supported by ST M25Pxx.

	config MTD_SST25L
	tristate "Support SST25L (non JEDEC) SPI Flash chips"
	depends on SPI_MASTER
	help
	This enables access to the non JEDEC SST25L SPI flash chips, used
	for program and data storage.

	Set up your spi devices with the right board-specific platform data,
	if you want to specify device partitioning.

	config MTD_SLRAM
	tristate "Uncached system RAM"
	help
	If your CPU cannot cache all of the physical memory in your machine,
	you can still use it for storage or swap by using this driver to
	present it to the system as a Memory Technology Device.

	config MTD_PHRAM
	tristate "Physical system RAM"
	help
	This is a re-implementation of the slram driver above.

	Use this driver to access physical memory that the kernel proper
	doesn't have access to, memory beyond the mem=xxx limit, nvram,
	memory on the video card, etc...

	config MTD_LART
	tristate "28F160xx flash driver for LART"
	depends on SA1100_LART
	help
	This enables the flash driver for LART. Please note that you do
	not need any mapping/chip driver for LART. This one does it all
	for you, so go disable all of those if you enabled some of them (:

	config MTD_MTDRAM
	tristate "Test driver using RAM"
	help
	This enables a test MTD device driver which uses vmalloc() to
	provide storage. You probably want to say 'N' unless you're
	testing stuff.

	config MTDRAM_TOTAL_SIZE
	int "MTDRAM device size in KiB"
	depends on MTD_MTDRAM
	default "4096"
	help
	This allows you to configure the total size of the MTD device
	emulated by the MTDRAM driver. If the MTDRAM driver is built
	as a module, it is also possible to specify this as a parameter when
	loading the module.

	config MTDRAM_ERASE_SIZE
	int "MTDRAM erase block size in KiB"
	depends on MTD_MTDRAM
	default "128"
	help
	This allows you to configure the size of the erase blocks in the
	device emulated by the MTDRAM driver. If the MTDRAM driver is built
	as a module, it is also possible to specify this as a parameter when
	loading the module.

	#If not a module (I don't want to test it as a module)
	config MTDRAM_ABS_POS
	hex "SRAM Hexadecimal Absolute position or 0"
	depends on MTD_MTDRAM=y
	default "0"
	help
	If you have system RAM accessible by the CPU but not used by Linux
	in normal operation, you can give the physical address at which the
	available RAM starts, and the MTDRAM driver will use it instead of
	allocating space from Linux's available memory. Otherwise, leave
	this set to zero. Most people will want to leave this as zero.

	config MTD_BLOCK2MTD
	tristate "MTD using block device"
	depends on BLOCK
	help
	This driver allows a block device to appear as an MTD. It would
	generally be used in the following cases:

	Using Compact Flash as an MTD, these usually present themselves to
	the system as an ATA drive.
	Testing MTD users (eg JFFS2) on large media and media that might
	be removed during a write (using the floppy drive).

	comment "Disk-On-Chip Device Drivers"

	config MTD_DOC2000
	tristate "M-Systems Disk-On-Chip 2000 and Millennium (DEPRECATED)"
	depends on MTD_NAND
	select MTD_DOCPROBE
	select MTD_NAND_IDS
	---help---
	This provides an MTD device driver for the M-Systems DiskOnChip
	2000 and Millennium devices. Originally designed for the DiskOnChip
	2000, it also now includes support for the DiskOnChip Millennium.
	If you have problems with this driver and the DiskOnChip Millennium,
	you may wish to try the alternative Millennium driver below. To use
	the alternative driver, you will need to undefine DOC_SINGLE_DRIVER
	in the <file:drivers/mtd/devices/docprobe.c> source code.

	If you use this device, you probably also want to enable the NFTL
	'NAND Flash Translation Layer' option below, which is used to
	emulate a block device by using a kind of file system on the flash
	chips.

	NOTE: This driver is deprecated and will probably be removed soon.
	Please try the new DiskOnChip driver under "NAND Flash Device
	Drivers".

	config MTD_DOC2001
	tristate "M-Systems Disk-On-Chip Millennium-only alternative driver (DEPRECATED)"
	depends on MTD_NAND
	select MTD_DOCPROBE
	select MTD_NAND_IDS
	---help---
	This provides an alternative MTD device driver for the M-Systems
	DiskOnChip Millennium devices. Use this if you have problems with
	the combined DiskOnChip 2000 and Millennium driver above. To get
	the DiskOnChip probe code to load and use this driver instead of
	the other one, you will need to undefine DOC_SINGLE_DRIVER near
	the beginning of <file:drivers/mtd/devices/docprobe.c>.

	If you use this device, you probably also want to enable the NFTL
	'NAND Flash Translation Layer' option below, which is used to
	emulate a block device by using a kind of file system on the flash
	chips.

	NOTE: This driver is deprecated and will probably be removed soon.
	Please try the new DiskOnChip driver under "NAND Flash Device
	Drivers".

	config MTD_DOC2001PLUS
	tristate "M-Systems Disk-On-Chip Millennium Plus"
	depends on MTD_NAND
	select MTD_DOCPROBE
	select MTD_NAND_IDS
	---help---
	This provides an MTD device driver for the M-Systems DiskOnChip
	Millennium Plus devices.

	If you use this device, you probably also want to enable the INFTL
	'Inverse NAND Flash Translation Layer' option below, which is used
	to emulate a block device by using a kind of file system on the
	flash chips.

	NOTE: This driver will soon be replaced by the new DiskOnChip driver
	under "NAND Flash Device Drivers" (currently that driver does not
	support all Millennium Plus devices).

	config MTD_DOCG3
	tristate "M-Systems Disk-On-Chip G3"
	select BCH
	select BCH_CONST_PARAMS
	---help---
	This provides an MTD device driver for the M-Systems DiskOnChip
	G3 devices.

	The driver provides access to G3 DiskOnChip, distributed by
	M-Systems and now Sandisk. The support is very experimental,
	and doesn't give access to any write operations.

	if MTD_DOCG3
	config BCH_CONST_M
	default 14
	config BCH_CONST_T
	default 4
	endif

	config MTD_DOCPROBE
	tristate
	select MTD_DOCECC

	config MTD_DOCECC
	tristate

	config MTD_DOCPROBE_ADVANCED
	bool "Advanced detection options for DiskOnChip"
	depends on MTD_DOCPROBE
	help
	This option allows you to specify nonstandard address at which to
	probe for a DiskOnChip, or to change the detection options. You
	are unlikely to need any of this unless you are using LinuxBIOS.
	Say 'N'.

	config MTD_DOCPROBE_ADDRESS
	hex "Physical address of DiskOnChip" if MTD_DOCPROBE_ADVANCED
	depends on MTD_DOCPROBE
	default "0x0"
	---help---
	By default, the probe for DiskOnChip devices will look for a
	DiskOnChip at every multiple of 0x2000 between 0xC8000 and 0xEE000.
	This option allows you to specify a single address at which to probe
	for the device, which is useful if you have other devices in that
	range which get upset when they are probed.

	(Note that on PowerPC, the normal probe will only check at
	0xE4000000.)

	Normally, you should leave this set to zero, to allow the probe at
	the normal addresses.

	config MTD_DOCPROBE_HIGH
	bool "Probe high addresses"
	depends on MTD_DOCPROBE_ADVANCED
	help
	By default, the probe for DiskOnChip devices will look for a
	DiskOnChip at every multiple of 0x2000 between 0xC8000 and 0xEE000.
	This option changes to make it probe between 0xFFFC8000 and
	0xFFFEE000. Unless you are using LinuxBIOS, this is unlikely to be
	useful to you. Say 'N'.

	config MTD_DOCPROBE_55AA
	bool "Probe for 0x55 0xAA BIOS Extension Signature"
	depends on MTD_DOCPROBE_ADVANCED
	help
	Check for the 0x55 0xAA signature of a DiskOnChip, and do not
	continue with probing if it is absent. The signature will always be
	present for a DiskOnChip 2000 or a normal DiskOnChip Millennium.
	Only if you have overwritten the first block of a DiskOnChip
	Millennium will it be absent. Enable this option if you are using
	LinuxBIOS or if you need to recover a DiskOnChip Millennium on which
	you have managed to wipe the first block.

	endmenu