Advanced Configuration and Power Interface Specification

ACPI Source Language (ASL)Reference
Name (_T_I, 0)
// Create Integer temporary variable for result
While (One)
{
Store (Add (ABCD (), 1), _T_I)
If (LEqual (_T_I, 1)) {
…statements1…
}
Else {
If (LNotEqual (Match (Package () {4, 5, 6}, MEQ, _T_I, MTR, 0, 0), Ones)) {
…statements2…
}
Else {
…statements3…
}
Break
}
The While (One) is emitted to enable the use of Break and Continue within the Switch statement.
Temporary names emitted by the ASL compiler should appear at the top level of the method, since
the Switch statement could appear within a loop and thus attempt to create the name more than once.
Note: If the ASL compiler is unable to determine the type of the expression, then it will generate a
warning and assume a type of Integer. The warning will indicate that the code should use one of the
type conversion operators (Such as ToInteger, ToBuffer, ToDecimalString or ToHexString).
Caution: Some of these operators are defined starting with ACPI 2.0 and as such may not be
supported by ACPI 1.0b compatible interpreters.
For example:
Switch (ABCD ()) // Cannot determine the type because methods can return anything.
{
…case statements…
}
will generate a warning and the following code:
Name (_T_I, 0)
Store (ABCD (), _T_I)
To remove the warning, the code should be:
Switch (ToInteger (ABCD ()))
{
…case statements…
}
19.6.127 ThermalZone (Declare Thermal Zone)
Syntax
ThermalZone (ThermalZoneName) {ObjectList}
Arguments
Declares a Thermal Zone object named ThermalZoneName. ThermalZone opens a name scope.
Each use of a ThermalZone term declares one thermal zone in the system. Each thermal zone in a
system is required to have a unique ThermalZoneName.
Version 6.0 891