1.\"- 2.\" Copyright (c) 2015-2016 SRI International 3.\" All rights reserved. 4.\" 5.\" This software was developed by SRI International and the University of 6.\" Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237) 7.\" ("CTSRD"), as part of the DARPA CRASH research programme. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28.\" SUCH DAMAGE. 29.\" 30.Dd January 20, 2016 31.Dt CFI 4 32.Os 33.Sh NAME 34.Nm cfi , 35.Nm cfid 36.Nd driver for Common Flash Interface (CFI) NOR flash 37.Sh SYNOPSIS 38.Cd "device cfi" 39.Cd "device cfid" 40.Cd "options CFI_SUPPORT_STRATAFLASH" 41.Cd "options CFI_ARMEDANDDANGEROUS" 42.Pp 43In 44.Pa /boot/device.hints : 45.Cd hint.cfi.0.at="nexus0" 46.Cd hint.cfi.0.maddr=0x74000000 47.Cd hint.cfi.0.msize=0x4000000 48.Pp 49In DTS file: 50.Cd flash@74000000 { 51.Cd " compatible =" Qo cfi-flash Qc ; 52.Cd " reg = <0x74000000 0x4000000>;" 53.Cd }; 54.Sh DESCRIPTION 55The 56.Nm 57device driver provides a management interface to NOR flash devices supporting 58the Common Flash Interface (CFI) specification. 59Its companion device 60.Nm cfid 61provides a 62.Xr geom 4 63disk interface to the device. 64.Pp 65Special support for features of the Intel StrataFlash line are available 66with the 67.Cd CFI_SUPPORT_STRATAFLASH 68kernel option. 69Additional support for write-once bits to switch part of Intel StrataFlash 70devices to read-only can be enabled by the 71.Cd CFI_ARMEDANDDANGEROUS 72kernel option. 73.Sh SEE ALSO 74.Xr led 4 75.Sh HISTORY 76The 77.Nm 78device driver first appeared in 79.Fx 8.0 . 80.Sh AUTHORS 81The 82.Nm 83driver was written by 84.An Juniper Networks 85with StrataFlash support by 86.An Sam Leffler . 87This manual page was written by SRI International and the University of 88Cambridge Computer Laboratory under DARPA/AFRL contract 89.Pq FA8750-10-C-0237 90.Pq Do CTSRD Dc , 91as part of the DARPA CRASH research programme. 92