109 lines
3.7 KiB
Plaintext
109 lines
3.7 KiB
Plaintext
-------------------------------------------------------------------------------
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Flashrom README
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-------------------------------------------------------------------------------
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Flashrom is a utility for reading, writing, and erasing flash ROM chips.
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It's often used to flash BIOS/coreboot/firmware images.
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It supports a wide range of DIP32, PLCC32, DIP8, and TSOP chips, which use
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various protocols such as LPC, FWH, parallel flash, or SPI.
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(see http://coreboot.org for details on coreboot)
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Build Requirements
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------------------
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To build the flashrom utility you need to install the following packages:
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* pciutils
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* pciutils-devel / pciutils-dev / libpci-dev
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* zlib-devel / zlib1g-dev
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Usage
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-----
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$ flashrom [-rwvEVfLhR] [-c chipname] [-s exclude_start] [-e exclude_end]
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[-m [vendor:]part] [-l file.layout] [-i imagename] [file]
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-r | --read: read flash and save into file
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-w | --write: write file into flash (default when
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file is specified)
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-v | --verify: verify flash against file
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-E | --erase: erase flash device
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-V | --verbose: more verbose output
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-c | --chip <chipname>: probe only for specified flash chip
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-s | --estart <addr>: exclude start position
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-e | --eend <addr>: exclude end postion
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-m | --mainboard <[vendor:]part>: override mainboard settings
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-f | --force: force write without checking image
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-l | --layout <file.layout>: read rom layout from file
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-i | --image <name>: only flash image name from flash layout
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-L | --list-supported: print supported devices
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-h | --help: print this help text
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-R | --version: print the version (release)
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If no file is specified, then all that happens
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is that flash info is dumped and the flash chip is set to writable.
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Exit status
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-----------
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Flashrom exits with 0 on success, 1 on most failures but with 2 if /dev/mem
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(/dev/xsvc on Solaris) can not be opened and with 3 if a call to mmap() fails.
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coreboot Table and Mainboard Identification
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--------------------------------------------
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Flashrom reads the coreboot table to determine the current mainboard. If no
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coreboot table could be read or if you want to override these values, you can
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specify -m, e.g.:
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$ flashrom -w --mainboard AGAMI:ARUMA agami_aruma.rom
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See the 'Supported mainboards' section in the output of 'flashrom -L' for
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a list of boards which require the specification of the board name, if no
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coreboot table is found.
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ROM Layout Support
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------------------
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Flashrom supports ROM layouts. This allows you to flash certain parts of
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the flash chip only. A ROM layout file looks like follows:
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00000000:00008fff gfxrom
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00009000:0003ffff normal
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00040000:0007ffff fallback
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i.e.:
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startaddr:endaddr name
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All addresses are offsets within the file, not absolute addresses!
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If you only want to update the normal image in a ROM you can say:
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flashrom -w --layout rom.layout --image normal agami_aruma.rom
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To update normal and fallback but leave the VGA BIOS alone, say:
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flashrom -w -l rom.layout -i normal -i fallback agami_aruma.rom
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Currently overlapping sections are not supported.
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ROM layouts should replace the -s and -e option since they are more
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flexible and they should lead to a ROM update file format with the
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ROM layout and the ROM image in one file (cpio, zip or something?).
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Supported Flash Chips / Chipsets / Mainboards
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---------------------------------------------
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Please check the output of 'flashrom -L' for the list of supported
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flash chips, chipsets/southbridges, and mainboards.
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See also http://coreboot.org/Flashrom for more details.
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