2016-01-20 18:47:33 +00:00
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.\"-
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.\" Copyright (c) 2015-2016 SRI International
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.\" All rights reserved.
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.\"
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.\" This software was developed by SRI International and the University of
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.\" Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
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.\" ("CTSRD"), as part of the DARPA CRASH research programme.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd January 20, 2016
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.Dt CFI 4
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.Os
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.Sh NAME
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.Nm cfi ,
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.Nm cfid
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.Nd driver for Common Flash Interface (CFI) NOR flash
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.Sh SYNOPSIS
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.Cd "device cfi"
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.Cd "device cfid"
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.Cd "options CFI_SUPPORT_STRATAFLASH"
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.Cd "options CFI_ARMEDANDDANGEROUS"
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.Pp
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In
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.Pa /boot/device.hints :
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.Cd hint.cfi.0.at="nexus0"
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.Cd hint.cfi.0.maddr=0x74000000
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.Cd hint.cfi.0.msize=0x4000000
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.Pp
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In DTS file:
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.Cd flash@74000000 {
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2016-03-31 15:16:22 +00:00
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.Cd " compatible =" Qo cfi-flash Qc ;
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.Cd " reg = <0x74000000 0x4000000>;"
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2016-01-20 18:47:33 +00:00
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.Cd };
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.Sh DESCRIPTION
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The
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.Nm
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device driver provides a management interface to NOR flash devices supporting
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the Common Flash Interface (CFI) specification.
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Its companion device
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.Nm cfid
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provides a
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.Xr geom 4
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disk interface to the device.
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.Pp
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Special support for features of the Intel StrataFlash line are available
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with the
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.Cd CFI_SUPPORT_STRATAFLASH
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kernel option.
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Additional support for write-once bits to switch part of Intel StrataFlash
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devices to read-only can be enabled by the
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.Cd CFI_ARMEDANDDANGEROUS
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kernel option.
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.Sh SEE ALSO
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.Xr led 4
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.Sh HISTORY
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The
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.Nm
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device driver first appeared in
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.Fx 8.0 .
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.Sh AUTHORS
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The
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.Nm
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driver was written by
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.An Juniper Networks
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with StrataFlash support by
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.An Sam Leffler .
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This manual page was written by SRI International and the University of
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Cambridge Computer Laboratory under DARPA/AFRL contract
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.Pq FA8750-10-C-0237
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.Pq Do CTSRD Dc ,
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as part of the DARPA CRASH research programme.
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