Sun Firetrademark 6800/4810/4800/3800 Systems Platform Administration Manual Table of ContentsPrevious ChapterNext ChapterBook Index


A P P E N D I X  A
Mapping Device Path Names

This appendix describes how to map device path names to physical system devices. It describes the following topics:

Device Mapping

The physical address represents a physical characteristic that is unique to the device. Examples of physical addresses include the bus address and the slot number. The slot number indicates where the device is installed.

You reference a physical device by the node identifier--agent ID (AID). The AID ranges from 0 to 31 in decimal notation (0 to 1f in hexadecimal). In the device path beginning with ssm@0,0 the first number, 0, is the node ID.

CPU/Memory Mapping

CPU/Memory board and memory agent IDs (AIDs) range from 0 to 23 in decimal notation (0 to 17 in hexadecimal). Depending on the platform type, a system can have up to six CPU/Memory boards.

Each CPU/Memory board can have either two or four CPUs, depending on your configuration. Each CPU/Memory board has up to four banks of memory. Each bank of memory is controlled by one memory management unit (MMU), which is the CPU. The following code example shows a device tree entry for a CPU and its associated memory: 

/ssm@0,0/SUNW/UltraSPARC-III@b,0 /ssm@0,0/SUNW/memory-controller@b,400000

where:

in b,0

    • b is the CPU agent identifier (AID)

    • 0 is the CPU register

in b,400000

    • b is the memory agent identifier (AID)

    • 400000 is the memory controller register

There are up to four CPUs on each CPU/Memory board (TABLE A-1):

  • CPUs with AIDs 0-3 reside on board name SB0.

  • CPUs with AIDs 4-7 on board name SB1.

  • CPUs with AIDs 8-11 on board name SB2, and so on.

    • TABLE A-1 CPU and Memory Agent ID Assignment

    CPU/Memory Board Name

    Agent IDs on Each CPU/Memory Board

     

    CPU 0

    CPU 1

    CPU 2

    CPU 3

    SB0

    0 (0)

    1 (1)

    2 (2)

    3 (3)

    SB1

    4 (4)

    5 (5)

    6 (6)

    7 (7)

    SB2

    8 (8)

    9 (9)

    10 (a)

    11 (b)

    SB3

    12 (c)

    13 (d)

    14 (e)

    15 (f)

    SB4

    16 (10)

    17 (11)

    18 (12)

    19 (13)

    SB5

    20 (14)

    21 (15)

    22 (16)

    23 (17)

    The first number in the columns of agent IDs is a decimal number. The number or letter in parentheses is in hexadecimal notation.


I/O Assembly Mapping

TABLE A-2 lists the types of I/O assemblies, the number of slots each I/O assembly has, and the systems the I/O assembly types are supported on.

TABLE A-2 I/O Assembly Type and Number of Slots per I/O Assembly by System Type

I/O Assembly Type

Number of Slots Per I/O Assembly

System Name(s)

PCI

8

Sun Fire 6800/4810/4800 systems

CompactPCI

6

Sun Fire 3800 system

CompactPCI

4

Sun Fire 6800/4810/4800 systems


TABLE A-3 lists the number of I/O assemblies per system and the I/O assembly name.

TABLE A-3 Number and Name of I/O Assemblies per System

System Name(s)

Number of I/O Assemblies

I/O Assembly Name

Sun Fire 6800 system

4

IB6-IB9

Sun Fire 4810 system

2

IB6 and IB8

Sun Fire 4800 system

2

IB6 and IB8

Sun Fire 3800 system

2

IB6 and IB8


Each I/O assembly hosts two I/O controllers:

  • I/O controller 0

  • I/O controller 1

When mapping the I/O device tree entry to a physical component in the system, you must consider up to five nodes in the device tree:

  • Node identifier (ID)

  • ID controller agent ID (AID)

  • Bus offset

  • PCI or CompactPCI slot

  • Device instance

TABLE A-4 lists the AIDs for the two I/O controllers in each I/O assembly.

TABLE A-4 I/O Controller Agent ID Assignments

Slot Number

I/O Assembly Name

Even I/O Controller AID

Odd I/O Controller AID

6

IB6

24 (18)

25 (19)

7

IB7

26 (1a)

27 (1b)

8

IB8

28 (1c)

29 (1d)

9

IB9

30 (1e)

31 (1f)

The first number in the column is a decimal number. The number (or a number and letter combination) in parentheses is in hexadecimal notation.


Each I/O controller has two bus sides: A and B.

  • Bus A, which is 66 MHz, is referenced by offset 600000.

  • Bus B, which is 33 MHz, is referenced by offset 700000.

The board slots located in the I/O assembly are referenced by the device number.

PCI I/O Assembly

This section describes the PCI I/O assembly slot assignments and provides an example of the device path.

The following code example gives a breakdown of a device tree entry for a SCSI disk: 

/ssm@0,0/pci@19,700000/pci@3/SUNW,isptwo@4/sd@5,0


Note - The numbers in the device path are hexadecimal.


where:

in 19,700000

    • 19 is the I/O controller agent identifier (AID).

    • 700000 is the bus offset.

in pci@3

    • 3 is the device number.

isptwo is the SCSI host adapter.

in sd@5,0

    • 5 is the SCSI target number for the disk.

    • 0 is the logic unit number (LUN) of the target disk.

This section describes the PCI I/O assembly slot assignments and provides an example of the device path.

TABLE A-5 lists, in hexadecimal notation, the slot number, I/O assembly name, device path of each I/O assembly, the I/O controller number, and the bus.

TABLE A-5 8-Slot PCI I/O Assembly Device Map for the Sun Fire 6800/4810/4810 Systems

I/O Assembly Name

Device Path

 

 

Physical Slot Number

I/O Controller Number

Bus

 

 

IB6

/ssm@0,0/pci@18,700000/pci@1

0

0

B

 

/ssm@0,0/pci@18,700000/pci@2

1

0

B

 

/ssm@0,0/pci@18,700000/pci@3

2

0

B

 

/ssm@0,0/pci@18,600000/pci@1

3

0

A

 

/ssm@0,0/pci@19,700000/pci@1

4

1

B

 

/ssm@0,0/pci@19,700000/pci@2

5

1

B

 

/ssm@0,0/pci@19,700000/pci@3

6

1

B

 

/ssm@0,0/pci@19,600000/pci@1

7

1

A

IB7

/ssm@0,0/pci@1a,700000/pci@1

0

0

B

 

/ssm@0,0/pci@1a,700000/pci@2

1

0

B

 

/ssm@0,0/pci@1a,700000/pci@3

2

0

B

 

/ssm@0,0/pci@1a,600000/pci@1

3

0

A

 

/ssm@0,0/pci@1b,700000/pci@1

4

1

B

 

/ssm@0,0/pci@1b,700000/pci@2

5

1

B

 

/ssm@0,0/pci@1b,700000/pci@3

6

1

B

 

/ssm@0,0/pci@1b,600000/pci@1

7

1

A

IB8

/ssm@0,0/pci@1c,700000/pci@1

0

0

B

 

/ssm@0,0/pci@1c,700000/pci@2

1

0

B

 

/ssm@0,0/pci@1c,700000/pci@3

2

0

B

 

/ssm@0,0/pci@1c,600000/pci@1

3

0

A

 

/ssm@0,0/pci@1d,700000/pci@1

4

1

B

 

/ssm@0,0/pci@1d,700000/pci@2

5

1

B

 

/ssm@0,0/pci@1d,700000/pci@3

6

1

B

 

/ssm@0,0/pci@1d,600000/pci@1

7

1

A

IB9

/ssm@0,0/pci@1e,700000/pci@1

0

0

B

 

/ssm@0,0/pci@1e,700000/pci@2

1

0

B

 

/ssm@0,0/pci@1e,700000/pci@3

2

0

B

 

/ssm@0,0/pci@1e,600000/pci@1

3

0

A

 

/ssm@0,0/pci@1f,700000/pci@1

4

1

B

 

/ssm@0,0/pci@1f,700000/pci@2

5

1

B

 

/ssm@0,0/pci@1f,700000/pci@3

6

1

B

 

/ssm@0,0/pci@1f,600000/pci@1

7

1

A


In TABLE A-5, note the following:

    • 600000 is the bus offset and indicates bus A, which operates at 66 MHz.

    • 700000 is the bus offset and indicates bus B, which operates at 33 MHz.

    • pci@3 is the device number. In this example @3 means it is the third device on the bus.

FIGURE A-1 illustrates the Sun Fire 6800 PCI I/O assembly physical slot designations for I/O assemblies IB6 through IB9.

FIGURE A-1 Sun Fire 6800 System PCI Physical Slot Designations for IB6 Through IB9

Diagram of PCI physical slot designations for Sun Fire 6800 I/O assemblies IB6 through IB9.

FIGURE A-2 illustrates the comparable information for the Sun Fire 4810/4800/3800 systems.FIGURE A-2 Sun Fire 4810/4800 Systems PCI Physical Slot Designations for IB6 and IB8

Diagram of PCI physical slot designations for Sun Fire 4810/4800 I/O assemblies IB6 and IB9.

CompactPCI I/O Assembly

This section describes the CompactPCI I/O assembly slot assignments and provides an example on the 6-slot I/O assembly device paths.


procedure icon  To Determine an I/O Physical Slot Number Using an I/O Device Path

1. Use TABLE A-6 for Sun Fire 3800 systems or to determine the:

    • I/O assembly based on the I/O controller AID address.

    • Physical slot number based on the I/O assembly and the device path.

2. Use FIGURE A-3 to locate the slot based on I/O assembly and the physical slot number.

CompactPCI I/O Assembly Slot Assignments

This code example is the breakdown of the device tree for the CompactPCI I/O assembly, ib8. 

/ssm@0,0/pci@1c,700000/pci@1/SUNW,isptwo@4

where:

in pci@1c,700000

    • c is the I/O controller AID.

    • 700000 is the bus offset.

in pci@1

    • 1 is the device number.

isptwo is the SCSI host adapter.

6-Slot CompactPCI I/O Assembly Device Map

TABLE A-6 lists, in hexadecimal notation, the slot number, I/O assembly name, device path of each I/O assembly, the I/O controller number, and the bus.

TABLE A-6 Mapping Device Path to I/O Assembly Slot Numbers for Sun Fire 3800 Systems

I/O Assembly Name

Device Path

 

Physical Slot Number

I/O Controller Number

Bus

 

IB6

/ssm@0,0/pci@19,700000/pci@2

5

1

B

 

/ssm@0,0/pci@19,700000/pci@1

4

1

B

 

/ssm@0,0/pci@18,700000/pci@2

3

0

B

 

/ssm@0,0/pci@18,700000/pci@1

2

0

B

 

/ssm@0,0/pci@19,600000/pci@1

1

1

A

 

/ssm@0,0/pci@18,600000/pci@1

0

0

A

IB8

/ssm@0,0/pci@1d,700000/pci@2

5

1

B

 

/ssm@0,0/pci@1d,700000/pci@1

4

1

B

 

/ssm@0,0/pci@1c,700000/pci@2

3

0

B

 

/ssm@0,0/pci@1c,700000/pci@1

2

0

B

 

/ssm@0,0/pci@1d,600000/pci@1

1

1

A

 

/ssm@0,0/pci@1c,600000/pci@1

0

0

A


In TABLE A-6, note the following:

    • 600000 is the bus offset and indicates bus A, which operates at 66 MHz.

    • 700000 is the bus offset and indicates bus B, which operates at 33 MHz.

    • pci@1 is the device number. The @1 means it is the first device on the bus.

FIGURE A-3 illustrates the Sun Fire 3800 CompactPCI physical slot designations.

 FIGURE A-3 Sun Fire 3800 System 6-Slot CompactPCI Physical Slot Designations

Diagram of CompactPCI physical slot designations for Sun Fire 3800 I/O assemblies IB6 through IB9.
4-Slot CompactPCI I/O Assembly Device Map

TABLE A-7 lists, in hexadecimal notation, the slot number, I/O assembly name, device path of each I/O assembly, the I/O controller number, and the bus for Sun Fire 6800/4810/4800 systems.

TABLE A-7 Mapping Device Path to I/O Assembly Slot Numbers for Sun Fire 6800/4810/4800 Systems

I/O Assembly Name

Device Path

 

Physical Slot Number

I/O Controller Number

Bus

 

IB6

/ssm@0,0/pci@19,700000/pci@1

3

1

B

 

/ssm@0,0/pci@18,700000/pci@1

2

0

B

 

/ssm@0,0/pci@19,600000/pci@1

1

1

A

 

/ssm@0,0/pci@18,600000/pci@1

0

0

A

IB7

/ssm@0,0/pci@1b,700000/pci@1

3

1

B

 

/ssm@0,0/pci@1a,700000/pci@1

2

0

B

 

/ssm@0,0/pci@1b,600000/pci@1

1

1

A

 

/ssm@0,0/pci@1a,600000/pci@1

0

0

A

IB8

/ssm@0,0/pci@1d,700000/pci@1

3

1

B

 

/ssm@0,0/pci@1c,700000/pci@1

2

0

B

 

/ssm@0,0/pci@1d,600000/pci@1

1

1

A

 

/ssm@0,0/pci@1c,600000/pci@1

0

0

A

IB9

/ssm@0,0/pci@1f,700000/pci@1

3

1

B

 

/ssm@0,0/pci@1e,700000/pci@1

2

0

B

 

/ssm@0,0/pci@1f,600000/pci@1

1

1

A

 

/ssm@0,0/pci@1e,600000/pci@1

0

0

A


In TABLE A-7 note the following:

    • 600000 is the bus offset and indicates bus A, which operates at 66 MHz.

    • 700000 is the bus offset and indicates bus B, which operates at 33 MHz.

    • pci@1 is the device number. The @1 means it is the first device on the bus.

FIGURE A-4 illustrates the Sun Fire 4810 and 4800 CompactPCI physical slot designations.

FIGURE A-4 Sun Fire 4810/4800 Systems 4-Slot CompactPCI Physical Slot Designations

Diagram of 4-slot CompactPCI physical slot designations for Sun Fire 4810/4800 I/O assemblies IB6 and IB9.
FIGURE A-5 Sun Fire 6800 System 4-Slot CompactPCI Physical Slot Designations for IB6 through IB9

Diagram of 4-slot CompactPCI physical slot designations for Sun Fire 6800 I/O assemblies IB6 through IB9.


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