Displaying the Device Tree

The device tree can be displayed in two ways:

1. The prtconf(1M) command displays all of the device nodes in the device tree.

2. The /devices hierarchy is a representation of the device tree; use ls(1) to view it.

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   Note -

   /devices displays only devices that have drivers configured into the system. prtconf(1M) shows all device nodes regardless of whether a driver for the device exists on the system or not.

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prtconf(1M)

The prtconf(1M) command (excerpted example follows) displays all the devices in the system:

SUNW,Ultra-1
 ...
	pci, instance #0
								ebus, instance #0
       auxio (driver not attached)
       power (driver not attached)
       SUNW,pll (driver not attached)
       sc (driver not attached)
       se, instance #0
       su, instance #0
       su, instance #1
       ecpp (driver not attached)
       fdthree (driver not attached)
       eeprom (driver not attached)
       flashprom (driver not attached)
       SUNW,CS4231 (driver not attached)
 								network, instance #0
 								scsi, instance #0
       disk (driver not attached)
       tape (driver not attached)
       sd, instance #0
       sd, instance #1 (driver not attached)
       sd, instance #2 (driver not attached)
       sd, instance #3 (driver not attached)
       sd, instance #4 (driver not attached)
       sd, instance #5 (driver not attached)
       ....
pci, instance #1
SUNW,UltraSPARC-II (driver not attached)
SUNW,ffb (driver not attached)
pseudo, instance #0 

/devices

The /devices hierarchy provides a name space that represents the device tree. Following is an abbreviated listing of the /devices name space. The sample output corresponds to the example device tree and prtconf(1M) output shown previously.

/devices
/devices/pseudo
/devices/SUNW,ffb@1e,0:ffb0
/devices/pci@1f,4000/ebus@1
/devices/pci@1f,4000/scsi@3
/devices/pci@1f,4000/scsi@3:devctl
/devices/pci@1f,4000/ebus@1/ecpp@14,3043bc:ecpp0
/devices/pci@1f,4000/ebus@1/se@14,400000:0,hdlc
/devices/pci@1f,4000/ebus@1/se@14,400000:1,hdlc
/devices/pci@1f,4000/ebus@1/se@14,400000:a
/devices/pci@1f,4000/ebus@1/se@14,400000:a,cu
/devices/pci@1f,4000/ebus@1/se@14,400000:b
/devices/pci@1f,4000/ebus@1/se@14,400000:b,cu
/devices/pci@1f,4000/ebus@1/SUNW,CS4231@14,200000:sound,audio
/devices/pci@1f,4000/ebus@1/SUNW,CS4231@14,200000:sound,audioctl
/devices/pci@1f,4000/scsi@3/sd@0,0:a
/devices/pci@1f,4000/scsi@3/sd@0,0:a,raw