43 lines
1.6 KiB
Plaintext
43 lines
1.6 KiB
Plaintext
$OpenBSD: README,v 1.5 2020/04/23 15:06:27 sthen Exp $
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+-----------------------------------------------------------------------
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| Running ${PKGSTEM} on OpenBSD
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+-----------------------------------------------------------------------
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Programming on-board devices
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============================
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One common use of flashrom is to programme an on-board flash device
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(e.g. for updating devices on the mainboard or a PCI device attached to
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the machine you're running it on).
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This requires the ability to write directly to memory, which is
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INSECURE. Therefore, OpenBSD denies it under normal operating
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conditions.
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If you have decided to accept the risks of using this software, it is
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advised to reboot into *single user mode* ("boot -s"), mount necessary
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filesystems (mount -a -t nonfs), "ldconfig -m /usr/local/lib", flash
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and reboot.
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In single user mode, the system securelevel(8) does allow access to
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write directly to system memory and, importantly, network services and
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other third-party software will usually not be running at the time.
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flashrom also supports some external programming devices via USB; in
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those cases it can be run from a normal boot.
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Special notes for PC Engines APU
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--------------------------------
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One common use of flashrom on OpenBSD is to update coreboot on PC Engines
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APU devices.
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New firmware and release notes are available at https://pcengines.github.io/
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In some cases extra flags are needed to bypass warnings; see this URL
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for further information:
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https://github.com/pcengines/apu2-documentation/blob/master/docs/firmware_flashing.md
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The setpci command mentioned in that page, if needed, is in the
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pciutils package.
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