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flashrom

NAME

flashrom - read, write, and erase BIOS/ROM/flash chips

SYNOPSIS

flashrom [-rwvEVfLhR] [-c chipname] [-s exclude_start] [-e exclude_end]
         [-m vendor:part] [-l file.layout] [-i image_name] [file]

DESCRIPTION

flashrom is a utility for reading, writing, and erasing flash ROM chips. It's often used to flash BIOS/coreboot/firmware images.

It supports a wide range of DIP32, PLCC32, DIP8, SO8/SOIC8, TSOP32, and TSOP40 chips, which use various protocols such as LPC, FWH, parallel flash, or SPI.

(see http://coreboot.org for details on coreboot)

OPTIONS

If no file is specified, then all that happens is that flash info is dumped and the flash chip is set to writable.

-r, --read <file>

Read flash ROM contents and save them into the given <file>.

-w, --write <file>

Write file into flash ROM (default when <file> is specified).

-v, --verify <file>

Verify the flash ROM contents against the given <file>.

-E, --erase

Erase the flash ROM chip.

-V, --verbose

More verbose output.

-c, --chip <chipname>

Probe only for specified flash ROM chip.

-s, --estart <addr>

Exclude start position (obsolete).

-e, --eend <addr>

Exclude end postion (obsolete).

-m, --mainboard <[vendor:]part>

Override mainboard settings. This option is needed for some mainboards, see the flashrom --list-supported output for a list. The vendor is not required when the board name is unique.

-f, --force

Force write without checking whether the ROM image file is really meant to be used on this board.

Note: This check only works while coreboot is running, and only for those boards where the coreboot code supports it.

-l, --layout <file>

Read ROM layout from <file>.

-i, --image <name>

Only flash image <name> from flash layout.

-L, --list-supported

List the ROM chips, chipsets, and mainboards supported by flashrom. The list of mainboards consists of those boards which need a special ROM write-enable function for flashrom to work.

There are many other boards which will work out of the box, without such special support in flashrom. Some of the known-good/known-bad and tested ones are listed at http://coreboot.org/Flashrom#Supported_mainboards, but the list is not exhaustive, of course.

Please let us know if you can verify other boards to work or not work out of the box.

-h, --help

Show a help text and exit.

-R, --version

Show version information and exit.

EXIT STATUS

flashrom exits with 0 on success, 1 on most failures but with 2 if /dev/mem (/dev/xsvc on Solaris) can not be opened and with 3 if a call to mmap() fails.

BUGS

Please report any bugs at http://tracker.coreboot.org/trac/coreboot/newticket, or on the coreboot mailing list (http://coreboot.org/Mailinglist).

LICENCE

flashrom is covered by the GNU General Public License (GPL), version 2. Some files are additionally available under the GPL (version 2, or any later version).

COPYRIGHT

Please see the individual files.

AUTHORS

Carl-Daniel Hailfinger
Claus Gindhart <claus.gindhart@kontron.com>
Dominik Geyer <dominik.geyer@kontron.com>
Eric Biederman <ebiederman@lnxi.com>
Giampiero Giancipoli <gianci@email.it>
Joe Bao <Zheng.Bao@amd.com>
Luc Verhaegen <libv@skynet.be>
Markus Boas <ryven@ryven.de>
Nikolay Petukhov <nikolay.petukhov@gmail.com>
Peter Stuge <peter@stuge.se>
Reinder E.N. de Haan <lb_reha@mveas.com>
Ronald G. Minnich <rminnich@gmail.com>
Ronald Hoogenboom <ronald@zonnet.nl>
Stefan Reinauer <stepan@coresystems.de>
Stefan Wildemann <stefan.wildemann@kontron.com>
Steven James <pyro@linuxlabs.com>
Uwe Hermann <uwe@hermann-uwe.de>
Wang Qingpei <Qingpei.Wang@amd.com>
Yinghai Lu <yinghai.lu@amd.com>
some others

This manual page was written by Uwe Hermann <uwe@hermann-uwe.de>. It is licensed under the terms of the GNU GPL (version 2 or later).