Alert Standard Format (ASF) Specification

Alert Standard Format (ASF) Specification v2.0 DMTF Document DSP0136
DSP0136 23 April 2003 Page 49 of 94
4.1.1.1 Get Power-on Wait Time (GPWT)
Description:
Returns the current value of the system’s power-on wait time, in seconds.
Input
Argument(s):
<none>
Output
Argument(s):
Power-on Wait Time
(Integer)
The current system power-on wait time, in seconds.
Notes: The system firmware has a single, maximum amount of time that it might wait for an
ASF alert-sending device to establish connection with its transport media. For example,
an Ethernet device might require additional time from a cold power-on to establish a
network connection. Since there might be multiple ASF alert-sending devices in the
system, a device’s configuration software should first get the current wait time and set a
new time only if the device requires more time. See 5.1.5 for more information.
4.1.1.2 Set Power-on Wait Time (SPWT)
Description:
Sets the system’s power-on wait time, in seconds.
Input
Argument(s):
Power-on Wait Time
(Integer)
The value, in seconds, that an ASF alert-sending device
requires to establish connection with its transport media.
Output
Argument(s):
<none>
Notes: The system firmware has a single, maximum amount of time that it might wait for an
ASF alert-sending device to establish connection with its transport media. For example,
an Ethernet device might require additional time from a cold power-on to establish a
network connection. Since there might be multiple ASF alert-sending devices in the
system, a device’s configuration software should first get the current wait time and set a
new time only if the device requires more time. See 5.1.5 for more information.
4.1.2 ASF! Description Table
System firmware identifies the system’s ASF support and static configuration using the ACPI
System Description Table architecture. A pointer to the ASF-defined ASF! description table
appears as one of the entries in the firmware’s RSDT (for IA-32 systems) or XSDT (for IA-64
systems). The information presented in this table is static from the reference of the client’s last
boot.
This table is formatted as a standard ACPI System Description Table Header followed by one or
more ASF information records.
Field
Byte
Length
Byte
Offset
Description
ACPI System Description Table Header
Signature 4 0 ‘ASF!’. Signature for the ASF Description Table.
Length 4 4 The length of the table, in bytes, starting at offset 0.
Revision 1 8
The revision of the structure, and the version of the ASF
specification supported by the system. The value is stored as a
BCD (binary coded decimal) value. For ASF version 1.0, the
value is 10h.
Checksum 1 9
The entire table, including the checksum field, must sum to zero
to be considered valid by the information consumer.
OEMID 6 10 An OEM-supplied string that identifies the OEM.
OEM Table ID 8 16 For this table, the value is the manufacturer model ID.
OEM
Revision
4 24
An OEM-supplied revision number of this table. Larger numbers
are assumed to be newer revisions.