September 21, 2008 ACPI 4

### NAME

acpi - Advanced Configuration and Power Interface

### SYNOPSIS

acpi0 at mainbus0 acpiacad* at acpi? acpibat* at acpi? acpibut* at acpi? acpiec* at acpi? acpilid* at acpi? acpitz* at acpi? attimer* at acpi? aiboost* at acpi? com* at acpi? fdc* at acpi? hpet* at acpi? joy* at acpi? lpt* at acpi? mpu* at acpi? npx* at acpi? pckbc* at acpi? pcppi* at acpi? sony* at acpi? spic* at acpi? ug* at acpi? vald* at acpi? wss* at acpi? ym* at acpi?

options ACPI_DEBUG options ACPIVERBOSE options ACPI_ACTIVATE_DEV options ACPICA_PEDANTIC options ACPI_DSDT_OVERRIDE

### DESCRIPTION

NetBSD provides machine-independent bus support for ACPI devices and includes several ACPI device drivers.

The NetBSD implementation of ACPI integrates Intel's ACPI Component Architecture (aka ACPI-CA) for the OS-independent part. The ACPI-CA provides OS-neutral ACPI functionalities such as ACPI BIOS table support, an ACPI event framework and an AML (ACPI Machine Language) interpreter.

Options:

```ACPI_DEBUG`
  Enable ACPI debugging message outputs.

```ACPI_ACTIVATE_DEV`
  Determine if the ACPI driver should attempt to activate inactive devices. The default is off.

```ACPICA_PEDANTIC`
  Force strict conformance to the ACPI specification in the ACPI-CA. Do not enable this option unless you are debugging.

```ACPI_DSDT_OVERRIDE`
  Force a given DSDT instead of the BIOS-supplied version. Use ```ACPI_DSDT_FILE` to specify a DSDT.

```ACPI_DSDT_FILE="filename"`
  If ```ACPI_DSDT_FILE` is not specified, default to ``dsdt.hex'' in the build directory.

#### sysctl support

Two sysctl(8) settings are especially relevant for : ```hw.acpi_supported_states` and ```machdep.acpi_vbios_reset`. ```hw.acpi_supported_states` is a list of the supported states (see sysctl(7)). ```machdep.acpi_vbios_reset` defines the handling of the graphics card. The supported values for this are:

0
  No attempt to reset the VGA controller is done.

1
  Call the VGA BIOS when still in real mode. This can result in direct reboots. In that case, use `2' or vbetool post from the ```pkgsrc/sysutils/vbetool` package.

2
  Call the VGA BIOS using the in-kernel x86 emulator.

### SUPPORTED DEVICES

NetBSD ACPI supports several machine-dependent and machine-independent devices:

#### machine-independent devices

acpiacad
  ACPI AC adapters.

acpibat
  ACPI Control Method Batteries.

acpibut
  ACPI power and sleep buttons.

acpiec
  ACPI Embedded Controllers.

acpilid
  ACPI lid switches.

acpitz
  ACPI thermal zones.

attimer
  AT Timer.

aiboost
  ASUS AI Booster Hardware monitor.

com
  NS8250-, NS16450-, and NS16550-based serial ports.

fdc
  Floppy disk controllers.

hpet
  High Precision Event Timer.

joy
  Joystick/Game port interface.

lpt
  Standard ISA parallel port interface.

mpu
  Roland MPU-401 (compatible) MIDI UART.

pcppi
  AT-style speaker sound.

ug
  Abit uGuru Hardware monitor.

wss
  Windows Sound System-compatible sound cards based on the AD1848 and compatible chips.

ym
  Yamaha OPL3-SA2 and OPL3-SA3 audio device driver.

#### i386-dependent devices

npx
  i386 numeric processing extension coprocessor.

pckbc
  PC keyboard controllers.

sony
  Sony Miscellaneous Controller

spic
  Sony programmable I/O controller.

vald
  Toshiba Libretto device.

### SEE ALSO

acpiacad(4), acpibat(4), acpibut(4), acpiec(4), acpilid(4), acpitz(4), aiboost(4), apm(4), attimer(4), com(4), fdc(4), joy(4), lpt(4), mpu(4), npx(4), pci(4), pckbc(4), pcppi(4), sony(4), spic(4), ug(4), vald(4), wss(4), ym(4), acpidump(8), amldb(8)

### HISTORY

The acpi driver appeared in NetBSD1.6.

### BUGS

Most of the ACPI power management functionalities are not implemented.