21.1.4 ATA Device Paths
The table below shows an example device path for a ATA host controller that supports a single SCSI channel and is located at PCI device number 0x07 and PCI function 0x00 The PCI SCSI host controller is directly attached to a PCI root bridge.
This sample device path consists of an ACPI device path node, a PCI device path node, and a device path end structure. The _HID and _UID must match the ACPI table description of the PCI root bridge. The following is the shorthand notation for this device path: ACPI(PNP0A03,0)/PCI(7|0).

Table 34-SATA device path examples

Byte Offset
Byte Length
Data
Description
0x00
0x01
0x02
Generic Device Path Header - Type ACPI Device Path
0x01
0x01
0x01
Sub type - ACPI Device Path
0x02
0x02
0x0C
Length - 0x0C bytes
0x04
0x04
0x41D0, 0x0A03
_HID PNP0A03 - 0x41D0 represents a compressed string 'PNP' and is in the low-order bytes.
0x08
0x04
0x0000
_UID
0x0C
0x01
0x01
Generic Device Path Header - Type Hardware Device Path
0x0D
0x01
0x01
Sub type - PCI
0x0E
0x02
0x06
Length - 0x06 bytes
0x10
0x01
0x07
PCI Function
0x11
0x01
0x00
PCI Device
0x12
0x01
0xFF
Generic Device Path Header - Type End of Hardware Device Path
0x13
0x01
0xFF
Sub type - End of Entire Device Path
0x14
0x02
0x04
Length - 0x04 bytes
Copy link