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Copyright (c) 2015-2016 SRI International
All rights reserved.

This software was developed by SRI International and the University of
Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
("CTSRD"), as part of the DARPA CRASH research programme.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
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notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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$FreeBSD$

.Dd January 20, 2016 .Dt CFI 4 .Os .Sh NAME .Nm cfi , .Nm cfid .Nd driver for Common Flash Interface (CFI) NOR flash .Sh SYNOPSIS .Cd "device cfi" .Cd "device cfid" .Cd "options CFI_SUPPORT_STRATAFLASH" .Cd "options CFI_ARMEDANDDANGEROUS"

p In

a /boot/device.hints : .Cd hint.cfi.0.at="nexus0" .Cd hint.cfi.0.maddr=0x74000000 .Cd hint.cfi.0.msize=0x4000000

p In DTS file: .Cd flash@74000000 { .Cd " compatible =" Qo cfi-flash Qc ; .Cd " reg = <0x74000000 0x4000000>;" .Cd }; .Sh DESCRIPTION The .Nm device driver provides a management interface to NOR flash devices supporting the Common Flash Interface (CFI) specification. Its companion device .Nm cfid provides a .Xr geom 4 disk interface to the device.

p Special support for features of the Intel StrataFlash line are available with the .Cd CFI_SUPPORT_STRATAFLASH kernel option. Additional support for write-once bits to switch part of Intel StrataFlash devices to read-only can be enabled by the .Cd CFI_ARMEDANDDANGEROUS kernel option. .El .Sh SEE ALSO .Xr led 4 .Sh HISTORY The .Nm device driver first appeared in .Fx 8.0 . .Sh AUTHORS The .Nm driver was written by .An Juniper Networks with StrataFlash support by .An Sam Leffler . This manual page was written by SRI International and the University of Cambridge Computer Laboratory under DARPA/AFRL contract

q FA8750-10-C-0237

q Do CTSRD Dc , as part of the DARPA CRASH research programme.