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man4: bring back ofw_console.4 and openfirm.4

Browse source 
Back when I wrote openfirm.4, sparc64 was the only architecture to
include the corresponding device. However, nowadays all supported
architectures will provied this Open Firmware interface, even x86
when built with FDT support.
As for ofw_console(4), powerpc actually was the first architecture
to ship it but we'll probably not see another consumer in future.

This partially reverts 702547720c and
r357794 respectively, adjusting paths and content as appropriate.
This commit is contained in:
Marius Strobl 2021-01-16 16:58:38 +01:00
parent daad26e5fc
commit 0cdfc33805
4 changed files with 410 additions and 0 deletions
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2
share/man/man4/Makefile
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@ -410,6 +410,7 @@ MAN= aac.4 \
oce.4 \
ocs_fc.4\
ohci.4 \
openfirm.4 \
orm.4 \
${_ossl.4} \
ow.4 \
@ -718,6 +719,7 @@ MLINKS+=netintro.4 net.4 \
netintro.4 networking.4
MLINKS+=${_nfe.4} ${_if_nfe.4}
MLINKS+=nge.4 if_nge.4
MLINKS+=openfirm.4 openfirmware.4
MLINKS+=ow.4 onewire.4
MLINKS+=pccbb.4 cbb.4
MLINKS+=pcm.4 snd.4 \

1
share/man/man4/man4.powerpc/Makefile
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@ -7,6 +7,7 @@ MAN= adb.4 \
cuda.4 \
dtsec.4 \
llan.4 \
ofw_console.4 \
pmu.4 \
powermac_nvram.4 \
smu.4 \

111
share/man/man4/man4.powerpc/ofw_console.4 Normal file
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@ -0,0 +1,111 @@
.\"-
.\" Copyright (c) 2001 Miodrag Vallat.
.\" Copyright (c) 2005 Marius Strobl <marius@FreeBSD.org>
.\" 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. Redistribution 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 ``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 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.
.\"
.\" from: OpenBSD: pcons.4,v 1.4 2003/06/02 16:16:26 miod Exp
.\" $FreeBSD$
.\"
.Dd January 16, 2021
.Dt OFW_CONSOLE 4 powerpc
.Os
.Sh NAME
.Nm ofw_console
.Nd "Open Firmware console"
.Sh SYNOPSIS
.Cd "cpu AIM"
.Cd "options OFWCONS_POLL_HZ=N"
.Pp
.Cd "options KDB"
.Cd "options DDB"
.Cd "options ALT_BREAK_TO_DEBUGGER"
.Sh DESCRIPTION
The
.Nm
driver provides a simple text console,
using the Open Firmware services for input and output.
It will use the Open Firmware console devices set via the
.Va input-device
and
.Va output-device
variables.
.Pp
This driver is deprecated and only provided as a fallback console mechanism
if the real console hardware can not be driven by
.Fx .
.Pp
In case the
.Nm
console appears to work too slowly, its responsiveness probably can be improved
by including
.Cd "options OFWCONS_POLL_HZ=N" .
When omitted,
.Dv OFWCONS_POLL_HZ
defaults to 4.
For example, on
.Tn Sun Ultra 2
a value of 20 or higher works best.
Too high values, on the other hand, can cause
.Nm
to unnecessarily consume CPU.
.Sh FILES
.Bl -tag -width ".Pa /dev/keyboard" -compact
.It Pa /dev/console
.It Pa /dev/keyboard
terminal input device in case the console input device is the keyboard
.It Pa /dev/screen
terminal output device in case the console output device is the screen
.It Pa /dev/tty[a-z]
terminal device in case both the console input and output device is tty[a-z]
.El
.Sh SEE ALSO
.Xr akbd 4 ,
.Xr powermac_nvram 4 ,
.Xr vt 4
.Sh HISTORY
The
.Nm
driver first appeared in
.Fx 5.0 .
.Sh AUTHORS
The
.Nm
driver was written by
.An Benno Rice Aq Mt benno@FreeBSD.org .
.Sh CAVEATS
Since the Open Firmware will handle BREAK
(or Stop-A)
sequences before
.Nm ,
the preferred way to enter
.Xr ddb 4
when using
.Nm
is to include
.Cd "options ALT_BREAK_TO_DEBUGGER"
in a ddb-enabled kernel, and enter the alternate BREAK sequence
(RETURN TILDE CTRL-b).
.Sh BUGS
The
.Nm
driver also not attach to the hardware resources it actually talks to.

296
share/man/man4/openfirm.4 Normal file
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@ -0,0 +1,296 @@
.\"-
.\" Copyright (c) 1992, 1993
.\" The Regents of the University of California. All rights reserved.
.\"
.\" This software was developed by the Computer Systems Engineering group
.\" at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
.\" contributed to Berkeley.
.\"
.\" 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.
.\" 3. Neither the name of the University nor the names of its contributors
.\" may be used to endorse or promote products derived from this software
.\" without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
.\"
.\" from: @(#)openprom.4 8.1 (Berkeley) 6/5/93
.\" from: OpenBSD: openprom.4,v 1.9 2004/03/22 22:07:21 miod Exp
.\"
.\"-
.\" Copyright (c) 2005 Marius Strobl <marius@FreeBSD.org>
.\" 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 ``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 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 January 16, 2021
.Dt OPENFIRM 4
.Os
.Sh NAME
.Nm openfirm
.Nd "Open Firmware interface"
.Sh SYNOPSIS
.In sys/types.h
.In sys/ioctl.h
.In dev/ofw/openfirmio.h
.Sh DESCRIPTION
The
.Pa /dev/openfirm
device is an interface to the
.Tn Open Firmware
device tree.
This interface is highly stylized.
It uses
.Xr ioctl 2
calls for all operations.
These calls refer to the nodes in the
.Tn Open Firmware
device tree.
The nodes are represented by package handles,
which are simply integer values describing data areas.
Occasionally a package handle of 0 may be used or returned instead,
as described below.
.Pp
The calls that only take and/or return the package handle of a node
use a pointer to a
.Vt phandle_t
for this purpose.
The others use a pointer to a
.Vt "struct ofiocdesc"
descriptor,
which has the following definition:
.Bd -literal
struct ofiocdesc {
phandle_t of_nodeid;
int of_namelen;
const char *of_name;
int of_buflen;
char *of_buf;
};
.Ed
.Pp
The
.Va of_nodeid
member is the package handle of the node that is passed in or returned.
Strings are passed in via the
.Va of_name
member of
.Va of_namelen
length.
The maximum accepted length of
.Va of_name
is
.Dv OFIOCMAXNAME .
The
.Va of_buf
member is used to return strings except for the
.Dv OFIOCSET
call where it is also used to pass in a string.
In the latter case the maximum accepted length of
.Va of_buf
is
.Dv OFIOCMAXVALUE .
Generally,
.Va of_buf
works in a value-result fashion.
At entry to the
.Xr ioctl 2
call,
.Va of_buflen
is expected to reflect the buffer size.
On return,
.Va of_buflen
is updated to reflect the buffer contents.
.Pp
The following
.Xr ioctl 2
calls are supported:
.Bl -tag -width ".Dv OFIOCGETOPTNODE"
.It Dv OFIOCGETOPTNODE
Uses a
.Vt phandle_t .
Takes nothing and returns the package handle of the
.Pa /options
node.
.It Dv OFIOCGETNEXT
Uses a
.Vt phandle_t .
Takes the package handle of a node and returns the package handle of the next
node in the
.Tn Open Firmware
device tree.
The node following the last node has a package handle of 0.
The node following the node with the package handle of 0 is the first node.
.It Dv OFIOCGETCHILD
Uses a
.Vt phandle_t .
Takes the package handle of a node and returns the package handle of the first
child of that node.
This child may have siblings.
These can be determined by using
.Dv OFIOCGETNEXT .
If the node does not have a child,
a package handle of 0 is returned.
.It Dv OFIOCGET
Uses a
.Vt "struct ofiocdesc" .
Takes the package handle of a node and the name of a property.
Returns the property value and its length.
If no such property is associated with that node,
the length of the value is set to \-1.
If the named property exists but has no value,
the length of the value is set to 0.
.It Dv OFIOCGETPROPLEN
Uses a
.Vt "struct ofiocdesc" .
Takes the package handle of a node and the name of a property.
Returns the length of the property value.
This call is the same as
.Dv OFIOCGET
except that only the length of the property value is returned.
It can be used to determine whether a node has a particular property or whether
a property has a value without the need to provide memory for storing the value.
.It Dv OFIOCSET
Uses a
.Vt "struct ofiocdesc" .
Takes the package handle of a node,
the name of a property and a property value.
Returns the property value and the length that actually have been written.
The
.Tn Open Firmware
may choose to truncate the value if it is too long or write a valid value
instead if the given value is invalid for the particular property.
Therefore the returned value should be checked.
The
.Tn Open Firmware
may also completely refuse to write the given value to the property.
In this case
.Er EINVAL
is returned.
.It Dv OFIOCNEXTPROP
Uses a
.Vt "struct ofiocdesc" .
Takes the package handle of a node and the name of a property.
Returns the name and the length of the next property of the node.
If the property referenced by the given name is the last property of the node,
.Er ENOENT
is returned.
.It Dv OFIOCFINDDEVICE
Uses a
.Vt "struct ofiocdesc" .
Takes the name or alias name of a device node.
Returns package handle of the node.
If no matching node is found,
.Er ENOENT
is returned.
.El
.Sh FILES
.Bl -tag -width ".Pa /dev/openfirm"
.It Pa /dev/openfirm
Open Firmware interface node
.El
.Sh DIAGNOSTICS
The following may result in rejection of an operation:
.Bl -tag -width Er
.It Bq Er EBADF
The requested operation requires permissions not specified at the call to
.Fn open .
.It Bq Er EINVAL
The given package handle is not 0 and does not correspond to any valid node,
or the given package handle is 0 where 0 is not allowed.
.It Bq Er ENAMETOOLONG
The given name or value exceeds the maximum allowed length of
.Dv OFIOCMAXNAME
and
.Dv OFIOCMAXVALUE
bytes respectively.
.El
.Sh SEE ALSO
.Xr ioctl 2 ,
.Xr ofwdump 8
.Rs
.%Q "IEEE Standards Organization"
.%B "IEEE Std 1275-1994:"
.%B "IEEE Standard for Boot Firmware (Initialization Configuration) Firmware:"
.%B Core Requirements and Practices"
.%O ISBN 1-55937-426-8
.Re
.Sh HISTORY
The
.Nm
interface first appeared in
.Nx 1.6 .
The first
.Fx
version to include it was
.Fx 5.0 .
.Sh AUTHORS
.An -nosplit
The
.Nm
interface was ported to
.Fx
by
.An Thomas Moestl Aq Mt tmm@FreeBSD.org .
This manual page was written by
.An Marius Strobl Aq Mt marius@FreeBSD.org
based on the
.Ox
manual page for
.Xr openprom 4 .
.Sh CAVEATS
Due to limitations within
.Tn Open Firmware
itself,
these functions run at elevated priority and may adversely affect system
performance.
.Pp
For at least the
.Pa /options
node the property value passed in to the
.Dv OFIOCSET
call has to be null-terminated and the value length passed in has to include
the terminating
.Ql \e0 .
However, as with the
.Dv OFIOCGET
call,
the returned value length does not include the terminating
.Ql \e0 .