Advanced Configuration and Power Interface Specification

Device Configuration
Device(SATA) //AHCI- compatible SATA controller
{
Name(_HID, "…")
Name(_CLS, Package (3)
{
0x01, // Base Class (01h == Mass Storage)
0x06, // Sub-Class (06h == SATA)
0x01, // Programming Interface (01h == AHCI)
})
Name(_CRS, ResourceTemplate()
{
… // AHCI-defined system resources
})
}
6.1.4 _DDN (DOS Device Name)
This object is used to associate a logical name (for example, COM1) with a device. This name can be
used by applications to connect to the device.
Arguments:
None
Return Value:
A String containing the DOS device name
6.1.5 _HID (Hardware ID)
This object is used to supply OSPM with the device’s PNP ID or ACPI ID. 1
When describing a platform, use of any _HID objects is optional. However, a _HID object must be
used to describe any device that will be enumerated by OSPM. OSPM only enumerates a device
when no bus enumerator can detect the device ID. For example, devices on an ISA bus are
enumerated by OSPM. Use the _ADR object to describe devices enumerated by bus enumerators
other than OSPM.
Arguments:
None
Return Value:
An Integer or String containing the HID
A _HID object evaluates to either a numeric 32-bit compressed EISA type ID or a string. If a
string, the format must be an alphanumeric PNP or ACPI ID with no asterisk or other leading
characters.
A valid PNP ID must be of the form "AAA####" where A is an uppercase letter and # is a hex
digit. A valid ACPI ID must be of the form "NNNN####" where N is an uppercase letter or a
digit ('0'-'9') and # is a hex digit. This specification reserves the string "ACPI" for use only
1. PNP ID and ACPI ID Registry is at http://www.uefi.org/PNP_ACPI_Registry.
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