660 lines
15 KiB
Groff
660 lines
15 KiB
Groff
.\" $NetBSD: acpi.4,v 1.73 2011/10/05 10:10:31 jruoho Exp $
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.\"
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.\" Copyright (c) 2002, 2004, 2010 The NetBSD Foundation, Inc.
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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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd October 5, 2011
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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 Interface
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.Sh SYNOPSIS
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.Cd acpi0 at mainbus0
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.Pp
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.Cd options ACPI_DEBUG
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.Cd options ACPIVERBOSE
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.Cd options ACPI_ACTIVATE_DEV
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.Cd options ACPI_DSDT_OVERRIDE
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.Cd options ACPI_DSDT_FILE=""
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.Cd options ACPI_BLACKLIST_YEAR=2000
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.Sh DESCRIPTION
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.Nx
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provides machine-independent bus support for
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Advanced Configuration and Power Interface
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.Pq Tn ACPI
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devices and includes several
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.Tn ACPI
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device drivers.
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.Pp
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The
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.Nx
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implementation of
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.Tn ACPI
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integrates Intel's ACPI Component Architecture
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.Pq Tn ACPI-CA
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for the OS-independent part.
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The
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.Tn ACPI-CA
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provides OS-neutral
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.Tn ACPI
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functionalities such as
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.Tn ACPI
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.Tn BIOS
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table support,
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an
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.Tn ACPI
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event framework and an ACPI Machine Language
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.Pq Tn AML
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interpreter.
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.Pp
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Options:
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.Bl -tag -width ACPI_DSDT_FILE__filename_XX -offset 3n
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.It Dv ACPI_DEBUG
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Enable various debug facilities.
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.It Dv ACPIVERBOSE
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Enable verbose debug messages.
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.It Dv ACPI_ACTIVATE_DEV
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Determine if the
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.Tn ACPI
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driver should attempt to activate inactive devices.
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The default is off.
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.It Dv ACPI_DSDT_OVERRIDE
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Force a given Differentiated System Description Table
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.Pq Tn DSDT
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instead of the version supplied by the
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.Tn BIOS .
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Use
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.Dv ACPI_DSDT_FILE
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to specify a
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.Tn DSDT .
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.It Dv ACPI_DSDT_FILE="filename"
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If
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.Dv ACPI_DSDT_FILE
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is not specified, default to
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.Dq dsdt.hex
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in the build directory.
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.It Dv ACPI_BLACKLIST_YEAR=2000
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Do not use ACPI with any BIOS made on or before the specified year.
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.El
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.Sh SYSCTL SUPPORT
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Few
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.Xr sysctl 8
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variables are directly relevant for
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.Tn ACPI .
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.Bl -tag -width "123456" -offset indent
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.It Ic hw.acpi.root
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The address of the
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.Tn ACPI
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root pointer in system memory.
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.It Ic hw.acpi.sleep.state
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The system sleep state.
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.It Ic hw.acpi.sleep.states
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A list of system sleep states that the machine supports.
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The possible values are:
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.Pp
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.Bl -tag -width XS1X -offset indent -compact
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.It S0
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fully running
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.It S1
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power on suspend (CPU and hard disks are off)
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.It S2
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similar to S3, usually not implemented
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.It S3
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suspend-to-RAM
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.It S4
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suspend-to-disk (not supported on
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.Nx )
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.It S5
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power off
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.El
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.It Ic hw.acpi.sleep.beep
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A boolean variable that controls whether the
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.Tn PC
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speaker beeps upon resume.
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.It Ic hw.acpi.sleep.vbios
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Defines the handling of the graphics card.
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The supported values are:
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.Bl -tag -width '2' -offset 2n
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.It 0
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No attempt to reset the
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.Tn VGA
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controller will be made.
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.It 1
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Call the
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.Tn VGA
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.Tn BIOS
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when still in real mode.
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This can result in direct reboots.
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In that case, use
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.Sq 2
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or
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.Ic vbetool post
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from the
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.Pa pkgsrc/sysutils/vbetool
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package.
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.It 2
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Call the
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.Tn VGA
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.Tn BIOS
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using the in-kernel x86 emulator.
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.El
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.Pp
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If the system has problems in resuming from the
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.Tn S3
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state, experimenting with different values may provide a solution.
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.It Ic hw.acpi.stat.gpe
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The number of dispatched General Purpose Events
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.Pq Tn GPEs .
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.It Ic hw.acpi.stat.sci
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The number of System Control Interrupts
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.Pq Tn SCIs .
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See
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.Xr acpiec 4
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for a brief description of both
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.Tn GPEs
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and
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.Tn SCIs .
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.It Ic hw.acpi.stat.fixed
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The number of
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.Dq fixed events .
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.It Ic hw.acpi.stat.method
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The number of
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.Tn ACPI
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methods executed by the interpreter.
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.It Ic hw.acpi.power
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This read-only node describes the
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.Tn ACPI
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power state of devices.
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The values range from
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.Tn D0
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.Pq Dq on
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to
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.Tn D3
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.Pq Dq off .
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.It Ic hw.acpi.wake
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This node represents devices that can wake the system from the
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.Tn S3
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or
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.Tn S4
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sleep state.
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By default,
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.Xr acpibut 4 ,
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.Xr acpilid 4 ,
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and
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.Xr pckbd 4
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are allowed to wake the system, provided that the devices are present and
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the firmware supports wake-up capabilities for the devices.
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.El
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.Sh SUPPORTED DEVICES
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.Nx
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.Tn ACPI
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supports several machine-dependent and machine-independent devices,
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some specific to
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.Tn ACPI
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and some configured via it.
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.Ss Machine-independent devices
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.Bl -tag -width "thinkpad(4) " -offset indent -compact
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.It Xr acpiacad 4
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.Tn ACPI
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AC adapters.
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.It Xr acpibat 4
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.Tn ACPI
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batteries.
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.It Xr acpibut 4
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.Tn ACPI
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power and sleep buttons.
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.It Xr acpicpu 4
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.Tn ACPI
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processors.
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.It Xr acpidalb 4
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.Tn ACPI
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direction application launch buttons.
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.It Xr acpiec 4
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.Tn ACPI
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embedded controllers.
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.It Xr acpiecdt 4
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.Tn ACPI
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Embedded Controller Boot Resource Table
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.Pq Tn ECDT .
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.It Xr acpifan 4
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.Tn ACPI
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fans.
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.It Xr acpilid 4
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.Tn ACPI
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lid switches.
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.It Xr acpipmtr 4
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.Tn ACPI
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power meters.
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.It Xr acpismbus 4
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.Tn ACPI
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SMBus via control method interface
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.Pq Tn CMI .
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.It Xr acpitz 4
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.Tn ACPI
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thermal zones.
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.It Xr acpivga 4
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.Tn ACPI
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display adapter and output devices.
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.It Xr acpiwmi 4
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.Tn ACPI
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support for Windows Management Instrumentation.
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.It Xr acpiwdrt 4
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.Tn ACPI
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watchdogs.
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.It Xr aibs 4
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ASUSTeK voltage, temperature and fan sensors.
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.It asus
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ASUS laptop hotkeys.
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.It Xr attimer 4
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AT Timer.
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.It Xr com 4
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NS8250-, NS16450-, and NS16550-based serial ports.
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.It Xr fdc 4
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Floppy disk controllers.
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.It Xr fujbp 4
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Fujitsu brightness and pointer.
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.It Xr fujhk 4
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Fujitsu hotkeys.
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.It Xr hpacel 4
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HP 3D DriveGuard accelerometer.
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.It Xr hpet 4
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High Precision Event Timer
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.Pq Tn HPET .
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.It Xr hpqlb 4
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HP Quick Launch Buttons.
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.It Xr joy 4
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Joystick/Game port interface.
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.It Xr lpt 4
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Standard ISA parallel port interface.
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.It Xr mpu 4
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Roland MPU-401 (compatible) MIDI UART.
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.It Xr pcppi 4
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AT-style speaker sound.
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.It Xr thinkpad 4
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IBM/Lenovo ThinkPad laptop device driver.
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.It Xr ug 4
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Abit uGuru Hardware monitor.
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.It Xr vald 4
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Toshiba Libretto device.
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.It Xr wb 4
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Winbond W83L518D Integrated Media Reader.
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.It Xr wss 4
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Windows Sound System-compatible sound cards
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.It Xr ym 4
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Yamaha OPL3-SA2 and OPL3-SA3 audio device driver.
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.El
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.Ss i386-dependent devices
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.Bl -tag -width "thinkpad(4) " -offset indent -compact
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.It Xr npx 4
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i386 numeric processing extension coprocessor.
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.It Xr pckbc 4
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PC keyboard controllers.
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.It Xr sony 4
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Sony Miscellaneous Controller
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.It Xr spic 4
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Sony programmable I/O controller.
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.El
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.Sh DEBUGGING
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Although the situation has become better over the years,
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.Tn ACPI
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is typically prone to various errors,
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ranging from blatant flaws in the firmware to bugs in the implementation.
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Before anything else, it is a good practice to upgrade the
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.Tn BIOS
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to the latest version available from the vendor.
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.Pp
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To ease the task of diagnosing and fixing different problems, the
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.Tn ACPICA
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reference implementation provides a rich
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facility of different debugging methods.
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In
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.Nx
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these are generally only available if the kernel has been compiled with the
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.Tn ACPI_DEBUG
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option.
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.Ss Verbose messages
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The
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.Tn ACPIVERBOSE
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compile time option enables some verbose
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debug messages printed during the system startup.
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In a
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.Tn MODULAR
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(see
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.Xr options 4 )
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system, the information can be printed also at runtime,
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regardless of the presence of
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.Tn ACPIVERBOSE .
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To print the messages,
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.Xr modload 8
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the
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.Ic acpiverbose
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module using the option
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.Ar -b dump=true .
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.Ss Custom DSDT
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.Tn ACPI
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interprets bytecode known as
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.Tn ACPI
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Machine Language
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.Pq Tn AML ,
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provided by the
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.Tn BIOS
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as a memory image during the system bootstrap.
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Most of the
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.Tn AML
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relevant to
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.Nm
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is implemented in the so-called
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Differentiated System Descriptor Table
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.Pq Tn DSDT .
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.Nx
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provides support for overriding the default
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.Tn DSDT
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supplied by the
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.Tn BIOS .
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.Pp
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The following steps can be used to override the
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.Tn DSDT :
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.Bl -enum -offset indent
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.It
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Dump the raw
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.Tn DSDT
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with
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.Xr acpidump 8 .
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.It
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Disassemble the table with
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.Xr iasl 8 .
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.It
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Modify the disassembled table.
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.It
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Compile the table with
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.Xr iasl 8
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using the option
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.Ar \-tc .
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.It
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Either copy the
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.Pq Pa *.hex
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file to
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.Bd -literal -offset indent
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src/sys/dev/acpi/acpica/Osd/custom_dsdt.hex
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.Ed
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.Pp
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or use the option
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.Bd -literal -offset indent
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ACPI_DSDT_FILE="/some/directory/custom_dsdt.hex"
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.Ed
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.Pp
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in the kernel configuration file.
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.It
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Define
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.Tn ACPI_DSDT_OVERRIDE
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in the kernel configuration file and rebuild.
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.El
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.Ss Debugger
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The
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.Tn ACPICA
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interpreter provides its own debugger for low-level debugging.
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It can be used to display internal data structures and namespace objects,
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and to debug the execution of control methods.
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Single step and breakpoint functionality are available.
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In
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.Nx
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this is integrated to the in-kernel
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.Xr ddb 4 .
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In order to enter the
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.Tn ACPICA
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debugger from
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.Xr ddb 4 ,
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use the command
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.Ic call
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with the argument
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.Ic acpi_osd_debugger .
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.Ss Debug Output
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.Nx
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provides three
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.Xr sysctl 8
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variables that control the debug output at runtime.
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The
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.Ic hw.acpi.debug.layer
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variable limits the output to a specific
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.Tn ACPI
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layer and the
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.Ic hw.acpi.debug.level
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variable controls the debug level.
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Both
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.Xr sysctl 8
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variables are string literals.
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The third variable is
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.Ic hw.acpi.debug.object .
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This is a boolean that controls whether debug messages internal to the
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.Tn AML
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are enabled.
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.Pp
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For the first two variables, the possible values are:
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.Bl -column -offset indent \
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"ACPI_RESOURCE_COMPONENT " "ACPI_RESOURCE_COMPONENT "
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.It Sy LAYER Ta Sy LEVEL
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.It Li ACPI_DEBUG_NONE Ta ACPI_DEBUG_NONE
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.It Ta
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.It Li ACPI_UTILITIES Ta ACPI_LV_INIT
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.It Li ACPI_HARDWARE Ta ACPI_LV_DEBUG_OBJECT
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.It Li ACPI_EVENTS Ta ACPI_LV_INFO
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.It Li ACPI_TABLES Ta ACPI_LV_ALL_EXCEPTIONS *
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.It Li ACPI_NAMESPACE Ta
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.It Li ACPI_PARSER Ta ACPI_LV_INIT_NAMES
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.It Li ACPI_DISPATCHER Ta ACPI_LV_PARSE
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.It Li ACPI_EXECUTER Ta ACPI_LV_LOAD
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.It Li ACPI_RESOURCES Ta ACPI_LV_DISPATCH
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.It Li ACPI_CA_DEBUGGER Ta ACPI_LV_EXEC
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.It Li ACPI_OS_SERVICES Ta ACPI_LV_NAMES
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.It Li ACPI_CA_DISASSEMBLER Ta ACPI_LV_OPREGION
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.It Li ACPI_COMPILER Ta ACPI_LV_BFIELD
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.It Li ACPI_TOOLS Ta ACPI_LV_TABLES
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.It Li ACPI_EXAMPLE Ta ACPI_LV_VALUES
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.It Li ACPI_DRIVER Ta ACPI_LV_OBJECTS
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.It Li ACPI_ALL_COMPONENTS * Ta ACPI_LV_RESOURCES
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.It Ta ACPI_LV_USER_REQUESTS
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.It Li ACPI_BUS_COMPONENT Ta ACPI_LV_PACKAGE
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.It Li ACPI_ACAD_COMPONENT Ta ACPI_LV_VERBOSITY1 *
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.It Li ACPI_BAT_COMPONENT Ta
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.It Li ACPI_BUTTON_COMPONENT Ta ACPI_LV_ALLOCATIONS
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.It Li APCI_EC_COMPONENT Ta ACPI_LV_FUNCTIONS
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.It Li ACPI_LID_COMPONENT Ta ACPI_LV_OPTIMIZATIONS
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.It Li ACPI_RESOURCE_COMPONENT Ta ACPI_LV_VERBOSITY2 *
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.It Li ACPI_TZ_COMPONENT Ta
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.It Li ACPI_DISPLAY_COMPONENT Ta
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.It Li ACPI_ALL_DRIVERS * Ta ACPI_LV_MUTEX
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.It Ta ACPI_LV_THREADS
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.It Ta ACPI_LV_IO
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.It Ta ACPI_LV_AML_INTERRUPTS
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.It Li "* This is a compound" Ta ACPI_LV_VERBOSITY3 *
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.It Li " constant, including" Ta
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.It Li " all previous elements." Ta ACPI_LV_AML_DISASSEMBLE
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.It Ta ACPI_LV_VERBOSE_INFO
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.It Ta ACPI_LV_FULL_TABLES
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.It Ta ACPI_LV_EVENTS
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.It Ta ACPI_LV_VERBOSE *
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.El
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.Pp
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In addition, there is
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.Dv ACPI_DEBUG_DEFAULT
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that is used by
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.Tn ACPICA
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as the default debug level.
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It includes
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.Dv ACPI_LV_INIT
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and
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.Dv ACPI_LV_DEBUG_OBJECT .
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.Pp
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The debug layer can be divided into two groups:
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the first one is specific to the
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.Tn ACPICA
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interpreter and the second one contains the internal
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.Tn ACPI
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components of
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.Nx .
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The constant
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.Dv ACPI_ALL_DRIVERS
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includes all
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.Nx
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specific parts.
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.Pp
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The
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.Tn ACPICA
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interpreter uses several debug levels internally,
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but the
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.Nx
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specific parts are typically limited to
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.Dv ACPI_LV_DEBUG_OBJECT
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and
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.Dv ACPI_LV_INFO .
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The debug output can be stopped by setting
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.Ic hw.acpi.debug.level
|
|
to
|
|
.Dv ACPI_DEBUG_NONE .
|
|
.Ss Example
|
|
As an example, a driver may have defined the component it belongs to and
|
|
the name of the module:
|
|
.Bd -literal -offset indent
|
|
#define _COMPONENT ACPI_BUS_COMPONENT
|
|
ACPI_MODULE_NAME ("acpi_example")
|
|
.Ed
|
|
.Pp
|
|
The driver may also utilize the debug facility:
|
|
.Bd -literal -offset indent
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Failed to evaluate _STA\\n"));
|
|
.Ed
|
|
.Pp
|
|
With these options the debug message from the
|
|
.Dv ACPI_DEBUG_PRINT
|
|
macro is only visible when
|
|
.Ic hw.acpi.debug.layer
|
|
is either
|
|
.Dv ACPI_BUS_COMPONENT
|
|
or a compound constant including it, and
|
|
.Ic hw.acpi.debug.level
|
|
is
|
|
.Dv ACPI_LV_INFO
|
|
or some constant that includes it.
|
|
Finally, it can be noted that the
|
|
.Tn ACPI
|
|
implementation uses the prefix
|
|
.Dv ACPI_DB ,
|
|
whereas the debug level
|
|
.Xr sysctl 8
|
|
variable is always specified with the prefix
|
|
.Dv ACPI_LV .
|
|
.Pp
|
|
Another example can be mentioned for the use of
|
|
.Ic hw.acpi.debug.object .
|
|
The following could appear in an
|
|
.Tn ASL
|
|
code:
|
|
.Bd -literal -offset indent
|
|
Method(_Q19, 0, NotSerialized)
|
|
{
|
|
Store("_Q19 invoked", Debug)
|
|
Notify(ACAD, 0x80)
|
|
}
|
|
.Ed
|
|
.Pp
|
|
When
|
|
.Ic hw.acpi.debug.object
|
|
is set to 1, the message stored to the debug object
|
|
is printed every time the method is called by the interpreter.
|
|
.Sh SEE ALSO
|
|
.Xr ioapic 4 ,
|
|
.Xr acpidump 8 ,
|
|
.Xr amldb 8 ,
|
|
.Xr iasl 8
|
|
.Rs
|
|
.%A Hewlett-Packard Corporation
|
|
.%A Intel Corporation
|
|
.%A Microsoft Corporation
|
|
.%A Phoenix Technologies Ltd.
|
|
.%A Toshiba Corporation
|
|
.%T Advanced Configuration and Power Interface Specification
|
|
.%N Revision 4.0
|
|
.%D June 16, 2009
|
|
.%U http://www.acpi.info/spec.htm
|
|
.Re
|
|
.Rs
|
|
.%A Intel Corporation
|
|
.%T ACPI Component Architecture,
|
|
.%T Programmer Reference,
|
|
.%T OS-Independent Subsystem, Debugger, and Utilities
|
|
.%N Revision 1.27
|
|
.%D January 20, 2010
|
|
.%U http://www.acpica.org/download/acpica-reference.pdf
|
|
.Re
|
|
.Rs
|
|
.%A Len Brown
|
|
.%T ACPI in Linux - Myths vs. Reality
|
|
.%D June 27-30, 2007
|
|
.%O Proceedings of the Linux Symposium
|
|
.%P 65-74
|
|
.%U http://www.linuxsymposium.org/archives/OLS/Reprints-2007/brown_1-Reprint.pdf
|
|
.Re
|
|
.Rs
|
|
.%A Joerg Sonnenberger
|
|
.%A Jared D. McNeill
|
|
.%T Sleeping Beauty - NetBSD on Modern Laptops
|
|
.%D February 3, 2008
|
|
.%O Proceedings of AsiaBSDCon 2008
|
|
.%P 127-134
|
|
.%U http://2008.asiabsdcon.org/papers/P9A-paper.pdf
|
|
.Re
|
|
.Rs
|
|
.%A Takanori Watanabe
|
|
.%T ACPI Implementation on FreeBSD
|
|
.%I USENIX Association
|
|
.%B Proceedings of the FREENIX Track: 2002 USENIX Annual Technical Conference
|
|
.%P 121-131
|
|
.%D June 10-15, 2002
|
|
.%U http://www.usenix.org/event/usenix02/tech/freenix/full_papers/watanabe/watanabe.pdf
|
|
.Re
|
|
.Sh HISTORY
|
|
The
|
|
.Nm
|
|
driver
|
|
appeared in
|
|
.Nx 1.6 .
|
|
.Sh AUTHORS
|
|
.An -nosplit
|
|
Authors of the
|
|
.Nm
|
|
subsystem include
|
|
.An Charles M. Hannum ,
|
|
.An Frank van der Linden ,
|
|
.An Jared D. McNeill ,
|
|
.An Jason R. Thorpe ,
|
|
.An Joerg Sonnenberger ,
|
|
and
|
|
.An Jukka Ruohonen ,
|
|
among others.
|
|
.Sh BUGS
|
|
Most of the
|
|
.Tn ACPI
|
|
power management functionalities are not implemented.
|