2001-07-03 07:45:04 +00:00
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.\"
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.\" Copyright (c) 2001 Michael Smith
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.\" All rights reserved.
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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 July 2, 2001
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.Dt ACPI 4
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.Os
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.Sh NAME
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.Nm acpi
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.Nd Advanced Configuration and Power Management support
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.Sh SYNOPSIS
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.Cd device acpica
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.Pp
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.Cd options ACPI_DEBUG
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.Sh DESCRIPTION
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The
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.Nm
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driver provides support for the Intel/Microsoft/Compaq/Toshiba ACPI
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standard.
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This support includes platform hardware discovery (superseding the
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PnP and PCI BIOS), as well as power management (superseding APM) and
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other features.
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ACPI core support is provided by the ACPI CA reference implementation
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from Intel.
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2001-08-26 22:51:52 +00:00
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.Pp
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Note that the
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.Nm
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driver is automatically loaded by the bootloader, and should not normally
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be compiled into the kernel.
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2001-07-03 07:45:04 +00:00
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.Sh ENVIRONMENT
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This support is still experimental, and thus there are many debugging
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and tuning options which are managed via the kernel environment
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2001-07-06 08:10:59 +00:00
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space, and set in the
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.Xr loader 8
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before booting the kernel.
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2001-07-03 07:45:04 +00:00
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.Pp
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Debugging is separated between layers and levels, where a layer is
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a portion of the ACPI subsystem, and a level is a particular kind
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of debugging output.
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.Pp
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Both layers and levels are specified as a whitespace-separated list of
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tokens, with layers listed in
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.Va debug.acpi.layer
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and levels in
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.Va debug.acpi.level .
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The supported layers are:
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2001-07-06 08:10:59 +00:00
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.Pp
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.Bl -item -offset indent -compact
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2001-07-03 07:45:04 +00:00
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.It
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2001-07-06 08:10:59 +00:00
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.Li ACPI_UTILITIES
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2001-07-03 07:45:04 +00:00
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.It
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2001-07-06 08:10:59 +00:00
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.Li ACPI_HARDWARE
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2001-07-03 07:45:04 +00:00
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.It
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2001-07-06 08:10:59 +00:00
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.Li ACPI_EVENTS
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2001-07-03 07:45:04 +00:00
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.It
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2001-07-06 08:10:59 +00:00
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.Li ACPI_TABLES
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2001-07-03 07:45:04 +00:00
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.It
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2001-07-06 08:10:59 +00:00
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.Li ACPI_NAMESPACE
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2001-07-03 07:45:04 +00:00
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.It
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2001-07-06 08:10:59 +00:00
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.Li ACPI_PARSER
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2001-07-03 07:45:04 +00:00
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.It
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2001-07-06 08:10:59 +00:00
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.Li ACPI_DISPATCHER
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2001-07-03 07:45:04 +00:00
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.It
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2001-07-06 08:10:59 +00:00
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.Li ACPI_EXECUTER
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2001-07-03 07:45:04 +00:00
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.It
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2001-07-06 08:10:59 +00:00
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.Li ACPI_RESOURCES
|
2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_DEBUGGER
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.It
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.Li ACPI_OS_SERVICES
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2001-07-03 07:45:04 +00:00
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.It
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2001-07-06 08:10:59 +00:00
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.Li ACPI_BUS
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2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_SYSTEM
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.It
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2001-07-06 08:10:59 +00:00
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.Li ACPI_POWER
|
2001-07-03 07:45:04 +00:00
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.It
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2001-07-06 08:10:59 +00:00
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.Li ACPI_EC
|
2001-07-03 07:45:04 +00:00
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.It
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2001-07-06 08:10:59 +00:00
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.Li ACPI_AC_ADAPTER
|
2001-07-03 07:45:04 +00:00
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.It
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2001-07-06 08:10:59 +00:00
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.Li ACPI_BATTERY
|
2001-07-03 07:45:04 +00:00
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.It
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2001-07-06 08:10:59 +00:00
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.Li ACPI_BUTTON
|
2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_PROCESSOR
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2001-07-03 07:45:04 +00:00
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.It
|
2001-07-06 08:10:59 +00:00
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.Li ACPI_THERMAL
|
2001-07-03 07:45:04 +00:00
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.It
|
2001-08-26 22:51:52 +00:00
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.Li ACPI_FAN
|
2001-07-03 07:45:04 +00:00
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.It
|
2001-07-06 08:10:59 +00:00
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.Li ACPI_ALL_COMPONENTS
|
2001-07-03 07:45:04 +00:00
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.El
|
2001-07-06 08:10:59 +00:00
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.Pp
|
2001-07-03 07:45:04 +00:00
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|
The supported levels are:
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2001-07-06 08:10:59 +00:00
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.Pp
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.Bl -item -offset indent -compact
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2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_LV_OK
|
2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_LV_INFO
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2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_LV_WARN
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2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_LV_ERROR
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2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_LV_FATAL
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2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_LV_DEBUG_OBJECT
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2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_LV_ALL_EXCEPTIONS
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2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_LV_THREADS
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2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_LV_PARSE
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2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_LV_DISPATCH
|
2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_LV_LOAD
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2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_LV_EXEC
|
2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_LV_NAMES
|
2001-07-03 07:45:04 +00:00
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.It
|
2001-08-26 22:51:52 +00:00
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.Li ACPI_LV_OPREGION
|
2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_LV_BFIELD
|
2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_LV_TRASH
|
2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_LV_TABLES
|
2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_LV_FUNCTIONS
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2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_LV_VALUES
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2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_LV_OBJECTS
|
2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_LV_ALLOCATIONS
|
2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_LV_RESOURCES
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2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_LV_IO
|
2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_LV_INTERRUPTS
|
2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_LV_USER_REQUESTS
|
2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_LV_PACKAGE
|
2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_LV_MUTEX
|
2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_LV_INIT
|
2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_LV_ALL
|
2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_DB_AML_DISASSEMBLE
|
2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_DB_VERBOSE_INFO
|
2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_DB_FULL_TABLES
|
2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_DB_EVENTS
|
2001-07-03 07:45:04 +00:00
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.It
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2001-08-26 22:51:52 +00:00
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.Li ACPI_DB_VERBOSE
|
2001-07-03 07:45:04 +00:00
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.El
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.Pp
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Selection of the appropriate layer and level values is important
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|
to avoid massive amounts of debugging output.
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Check the code to see which you need.
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.Pp
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Debugging output by the ACPI CA subsystem is prefixed with the
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module name in lowercase, followed by a source line number.
|
2001-07-06 08:10:59 +00:00
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Output from the
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.Fx Ns -local
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code follows the same format, but
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2001-07-03 07:45:04 +00:00
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the module name is uppercased.
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.Pp
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The
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.Nm
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driver comprises a set of drivers, which may be selectively disabled
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in case of problems.
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To disable a sub-driver, list it in the kernel
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environment variable
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.Va debug.acpi.disable .
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.Pp
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ACPI sub-devices and features that can be disabled:
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.Bl -tag -width processor
|
2001-07-06 08:10:59 +00:00
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.It Li bus
|
2001-07-03 07:45:04 +00:00
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.Pq Vt feature
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Probes and attaches subdevices.
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Disabling will avoid scanning the ACPI namespace entirely.
|
2001-07-06 08:10:59 +00:00
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.It Li children
|
2001-07-03 07:45:04 +00:00
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.Pq Vt feature
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Attaches standard ACPI sub-drivers and devices enumerated in the
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ACPI namespace.
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Disabling this has a similar effect to disabling
|
2001-07-06 08:10:59 +00:00
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.Dq Li bus ,
|
2001-07-03 07:45:04 +00:00
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except that the
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ACPI namespace will still be scanned.
|
2001-07-06 08:10:59 +00:00
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.It Li button
|
2001-07-03 07:45:04 +00:00
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.Pq Vt device
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Supports ACPI button devices (typically power and sleep buttons).
|
2001-07-06 08:10:59 +00:00
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.It Li ec
|
2001-07-03 07:45:04 +00:00
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.Pq Vt device
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Supports the ACPI Embedded Controller interface, used to
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communicate with embedded platform controllers.
|
2001-07-06 08:10:59 +00:00
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.It Li isa
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2001-07-03 07:45:04 +00:00
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.Pq Vt device
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Supports an ISA bus bridge defined in the ACPI namespace,
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typically as a child of a PCI bus.
|
2001-07-06 08:10:59 +00:00
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.It Li lid
|
2001-07-03 07:45:04 +00:00
|
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|
.Pq Vt device
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|
Supports an ACPI laptop lid switch, which typically puts a
|
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system to sleep.
|
2001-07-06 08:10:59 +00:00
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.It Li pci
|
2001-07-03 07:45:04 +00:00
|
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.Pq Vt device
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Supports Host to PCI bridges.
|
2001-07-06 08:10:59 +00:00
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.It Li processor
|
2001-07-03 07:45:04 +00:00
|
|
|
.Pq Vt device
|
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|
|
Supports CPU power-saving and speed-setting functions.
|
2001-07-06 08:10:59 +00:00
|
|
|
.It Li thermal
|
2001-07-03 07:45:04 +00:00
|
|
|
.Pq Vt device
|
|
|
|
Supports system cooling and heat management.
|
2001-07-06 08:10:59 +00:00
|
|
|
.It Li timer
|
2001-07-03 07:45:04 +00:00
|
|
|
.Pq Vt device
|
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|
|
Implements a timecounter using the ACPI fixed-frequency timer.
|
|
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|
.El
|
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|
.Pp
|
|
|
|
It is also possible to avoid portions of the ACPI namespace which
|
|
|
|
may be causing problems, by listing the full path of the root of
|
|
|
|
the region to be avoided in the kernel environment variable
|
|
|
|
.Va debug.acpi.avoid .
|
|
|
|
The object and all of its children will be ignored during the
|
2001-07-06 08:10:59 +00:00
|
|
|
bus/children scan of the namespace.
|
|
|
|
The ACPI CA code will still
|
2001-07-03 07:45:04 +00:00
|
|
|
know about the avoided region.
|
2002-07-05 15:36:03 +00:00
|
|
|
.Sh OVERRIDING YOUR BIOS BYTECODE
|
|
|
|
ACPI interprets bytecode named AML, ACPI Machine Language, provided by the BIOS
|
2002-08-13 13:44:45 +00:00
|
|
|
vendor as a memory image at boot time.
|
|
|
|
Sometimes, the AML code contains
|
|
|
|
a problem that does not appear in the Microsoft implementation.
|
2002-07-05 15:36:03 +00:00
|
|
|
So we provide a way to override it with your own AML code.
|
|
|
|
.Pp
|
2002-08-13 13:44:45 +00:00
|
|
|
In order to load your AML code,
|
|
|
|
you must edit
|
2002-07-05 15:36:03 +00:00
|
|
|
.Pa /boot/loader.conf
|
2002-08-13 13:44:45 +00:00
|
|
|
and
|
2002-07-05 15:36:03 +00:00
|
|
|
include the following lines.
|
|
|
|
.Bd -literal -offset indent
|
|
|
|
acpi_dsdt_load="YES"
|
|
|
|
acpi_dsdt_name="/boot/acpi_dsdt.aml" #You may change the name.
|
|
|
|
.Ed
|
|
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.Pp
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2002-08-13 13:44:45 +00:00
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In order to prepare your AML code, you will need the
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.Xr acpidump 8
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and
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2002-07-05 15:36:03 +00:00
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.Xr iasl 1
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2002-08-13 13:44:45 +00:00
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utilities from the
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.Pa devel/acpicatools
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port, and some ACPI knowledge.
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2001-07-03 07:45:04 +00:00
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.Sh COMPATIBILITY
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ACPI is only found/supported on Intel platforms (i386/IA32 and IA64).
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.Sh SEE ALSO
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2002-07-05 15:36:03 +00:00
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.Xr loader.conf 5 ,
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2002-10-24 01:44:50 +00:00
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.Xr acpiconf 8 ,
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2002-07-05 15:36:03 +00:00
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.Xr acpidump 8 ,
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2002-10-24 01:44:50 +00:00
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.Xr config 8
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2002-07-05 15:36:03 +00:00
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.Rs
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2002-08-13 13:44:45 +00:00
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.%A "Compaq Computer Corporation"
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.%A "Intel Corporation"
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.%A "Microsoft Corporation"
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.%A "Phoenix Technologies Ltd."
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.%A "Toshiba Corporation"
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2002-07-05 15:36:03 +00:00
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.%D July 27 2000
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.%T "Advanced Configuration and Power Interface Specification"
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.%O http://acpi.info/spec.htm
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.Re
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2001-07-06 08:10:59 +00:00
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.Sh AUTHORS
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.An -nosplit
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2001-07-03 07:45:04 +00:00
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The ACPI CA subsystem is developed and maintained by
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Intel Architecture Labs.
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.Pp
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The following people made notable contributions to the ACPI subsystem
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in
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.Fx :
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2001-07-06 08:10:59 +00:00
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.An Michael Smith Aq msmith@FreeBSD.org ,
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.An Takanori Watanabe Aq takawata@jp.FreeBSD.org ,
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.An Mitsuru IWASAKI Aq iwasaki@jp.FreeBSD.org ,
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2001-07-03 07:45:04 +00:00
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.An Munehiro Matsuda ,
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the ACPI-jp mailing list at
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2001-07-06 08:10:59 +00:00
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.Aq acpi-jp@jp.FreeBSD.org ,
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2001-07-03 07:45:04 +00:00
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and many other contributors.
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.Pp
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This manual page was written by
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2001-07-06 08:10:59 +00:00
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.An Michael Smith Aq msmith@FreeBSD.org .
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2001-07-03 07:45:04 +00:00
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.Sh BUGS
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2001-08-26 22:51:52 +00:00
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If the
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.Nm
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driver is loaded as a module when it is already linked as part of the
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kernel, odd things may happen.
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