119 lines
3.8 KiB
Groff
119 lines
3.8 KiB
Groff
.\" Copyright (c) 2011 Aleksandr Rybalko
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" 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
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd April 3, 2011
|
|
.Dt NVRAM2ENV 4
|
|
.Os
|
|
.Sh NAME
|
|
.Nm nvram2env
|
|
.Nd "copy nvram-like data into kernel environment"
|
|
.Sh SYNOPSIS
|
|
.Cd "device nvram2env"
|
|
.Sh DESCRIPTION
|
|
.Nm
|
|
implements a simple method of reading the NVRAM-like data and information
|
|
stored in flash and storing it in the kernel environment. It can then be
|
|
used by various device drivers at boot-time.
|
|
.Pp
|
|
The NVRAM-like data is an array of zero terminated strings. Each string contains
|
|
the string name, "=" delimiter and the string value.
|
|
.Pp
|
|
.Nm
|
|
copies the environment values into kernel environment using the kernel setenv call.
|
|
.Pp
|
|
Configuration of
|
|
.Nm
|
|
is done in
|
|
.Xr device.hints 5
|
|
defining the NVRAM base address, fallback base address, maxsize and flags.
|
|
.Pp
|
|
.Nm
|
|
is currently MIPS-specific.
|
|
.Ss base
|
|
base - physical address where data block is stored.
|
|
.Ss fallbackbase
|
|
fallbackbase - physical address where data block is stored, but only
|
|
if not found at base.
|
|
.Ss maxsize
|
|
maxsize - maximum size of data block.
|
|
.Ss flags
|
|
flags - control flags, used to select nvram type and enable/disable CRC check.
|
|
.Bl -tag -width indent
|
|
.It Fa 0x0001
|
|
Avoid CRC checking. Currently CRC checking is not implemented, so to be future
|
|
compatible, please set it to "1".
|
|
.It Fa 0x0002
|
|
Use format "Generic", skip uint32_t field, then zero terminating array of
|
|
strings.
|
|
.It Fa 0x0004
|
|
Use Broadcom CFE format. uint32_t signature "FLSH", uint32_t size,
|
|
three unused fields uint32_t, then data.
|
|
.It Fa 0x0008
|
|
Use U-Boot format, uint32_t crc, then zero terminating array of strings.
|
|
.El
|
|
.Sh EXAMPLES
|
|
Usage in U-Boot case:
|
|
.Bd -literal -offset indent
|
|
hint.nvram.0.base=0x1f030000
|
|
hint.nvram.0.maxsize=0x2000
|
|
hint.nvram.0.flags=3 # 1 = No check, 2 = Format Generic
|
|
hint.nvram.1.base=0x1f032000
|
|
hint.nvram.1.maxsize=0x4000
|
|
hint.nvram.1.flags=3 # 1 = No check, 2 = Format Generic
|
|
.Ed
|
|
.Pp
|
|
CFE nvram with fallback:
|
|
.Bd -literal -offset indent
|
|
hint.nvram.0.base=0x1fff8000
|
|
hint.nvram.0.fallbackbase=0x1fc00400
|
|
hint.nvram.0.flags=4 # 4 = Format Broadcom
|
|
.Ed
|
|
.Pp
|
|
but seems for CFE nvram preferred to read both blocks:
|
|
.Pp
|
|
NVRAM partition: Static, CFE internal
|
|
.Bd -literal -offset indent
|
|
hint.nvram.0.flags=0x05 # Broadcom + nocheck
|
|
hint.nvram.0.base=0x1fc00400
|
|
.Ed
|
|
.Pp
|
|
Dynamic, editable form CFE, override values from first
|
|
.Bd -literal -offset indent
|
|
hint.nvram.1.flags=0x05 # Broadcom + nocheck
|
|
hint.nvram.1.base=0x1cff8000
|
|
.Ed
|
|
.Sh SEE ALSO
|
|
.Xr kenv 1 ,
|
|
.Xr kenv 2 .
|
|
.Sh HISTORY
|
|
.Nm
|
|
first appeared in
|
|
.Fx 9.0 .
|
|
.Sh AUTHORS
|
|
.An -nosplit
|
|
.Nm
|
|
.An Aleksandr Rybalko Aq ray@ddteam.net .
|