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.Dd May 11, 2018
.Dt ACPIHELP 8
.Os
.Sh NAME
.Nm acpihelp
.Nd help utility for ASL operators, AML opcodes, and ACPI predefined names
.Sh SYNOPSIS
.Nm
.Op Ar option ...
.Op Ar name/prefix | hex_value
.Sh DESCRIPTION
The following options are supported:
.Bl -tag -width indent
.It Fl a Op Ar name/prefix | *
Display both ASL operator and AML opcode name(s).
.It Fl d
Display iASL Preprocessor directives.
.It Fl e Op Ar hex_value
Decode ACPICA exception code.
.It Fl g Op Ar name/prefix | *
Display AML grammar element(s).
.It Fl h
Display help.
.It Fl i Op Ar name/prefix | *
Display ACPI/PNP Hardware ID(s).
.It Fl k Op Ar name/prefix | *
Display ASL non-operator keyword(s).
.It Fl m Op Ar name/prefix | *
Display AML opcode name(s).
.It Fl o Op Ar hex_value
Decode hex AML opcode.
.It Fl p Op Ar name/prefix | *
Display ASL predefined method name(s).
.It Fl s Op Ar name/prefix | *
Display ASL operator name(s).
.It Fl t
Display supported ACPI tables.
.It Fl u
Display ACPI-related UUIDs.
.It Fl v
Display version information.
.It Fl vd
Display build date and time.
.El
.Pp
If neither
.Ar name/prefix
nor
.Ar hex_value
are specified
.Nm
defaults to displaying all information available for the specified option.
.Pp
If a
.Ar name/prefix
but no options are specified
.Nm
defaults to finding ASL operator names if
.Ar name/prefix
does not start with an underscore, and to finding ASL predefined method
names if
.Ar name/prefix
does start with an underscore.
.Sh SEE ALSO
.Xr acpi 4 ,
.Xr acpibin 8 ,
.Xr acpicall 8 ,
.Xr acpiconf 8 ,
.Xr acpidump 8 ,
.Xr acpiexec 8 ,
.Xr acpinames 8 ,
.Xr acpixtract 8 ,
.Xr iasl 8
.Pp
.Lk https://acpica.org/documentation/
.Sh AUTHORS
The
.Nm
utility is provided by
.Tn Intel
as part of their
.Sy ACPICA
distribution.
.Pp
This manual page was written by
.An Sascha Wildner .