- Problem Statement: 

    Cheat Sheet: Non-Cacheable Address Space

- Symptoms:

    Various messages and/or dump output may refer to a physical
    address in the system (i.e., AFAR registers).
            

- Troubleshooting:

    The overview of the non-cacheable address spaces is:

       WCI-to-WCI transfers *       000 0000 0000 - 3ff ffff ffff
       Device Config Area           400 0000 0000 - 401 ffff ffff
       PCI Config & I/O             402 0000 0000 - 403 ffff ffff
       General IO or WCI area       404 0000 0000 - 7ff efff ffff
       Bootbus space                7ff f000 0000 - 7ff ffff ffff
                                  
        Used with transactions RIO, WIO, RBIO, and WBIO
        * WCI uses a cacheable range, but under non-cacheable transactions.

    The following breakdowns cover each address range in more detail.


    WCI-to-WCI transfers
    ====================

    |    4|     |            3|                  2|                  1|                   |
    |2|1|0|9|8|7|6|5|4|3|2|1|0|9|8|7|6|5|4|3|2|1|0|9|8|7|6|5|4|3|2|1|0|9|8|7|6|5|4|3|2|1|0|
    +-+---------------+-------------------------------------------------------------------+
    |0|   ncslice #   |                     16GB Space/slice                              |
    +-+---------------+-------------------------------------------------------------------+


    Device Config Area
    ==================

    |    4|     |            3|                  2|                  1|                   |
    |2|1|0|9|8|7|6|5|4|3|2|1|0|9|8|7|6|5|4|3|2|1|0|9|8|7|6|5|4|3|2|1|0|9|8|7|6|5|4|3|2|1|0|
    +-------------------+---------+---------+---------------------------------------------+
    |1 0 0 0 0 0 0 0 0 0|  Exp #  | Device #|           8MB Space/device                  |
    +-------------------+---------+---------+---------------------------------------------+

       Device Numbers [27:23]
       -----------------------------------------
       00000 - 00011        Devices in Slot 0
       11100 - 11101        IOCs in Slot 1
       01000 - 01001        Processors in Slot 1
       00100 - 00111        Unused
       01010 - 11011        Unused


    PCI Config & I/O
    ================

    |    4|     |            3|                  2|                  1|                   |
    |2|1|0|9|8|7|6|5|4|3|2|1|0|9|8|7|6|5|4|3|2|1|0|9|8|7|6|5|4|3|2|1|0|9|8|7|6|5|4|3|2|1|0|
    +-------------------+---------+-+-----------------------------------------------------+
    |1 0 0 0 0 0 0 0 0 1|  Exp #  |T|                    128MB Space                      |
    +-------------------+---------+-+-----------------------------------------------------+

       T = Target Slot
       ---------------
       0    Slot 0
       1    Slot 1


    General I/O or WCI Area
    =======================

    |    4|     |            3|                  2|                  1|                   |
    |2|1|0|9|8|7|6|5|4|3|2|1|0|9|8|7|6|5|4|3|2|1|0|9|8|7|6|5|4|3|2|1|0|9|8|7|6|5|4|3|2|1|0|
    +-----------------+-------------------------------------------------+-+---------------+
    |1|   ncslice #   |                     16GB Space/slice            |I|               |
    +-----------------+-------------------------------------------------+-+---------------+

       I = Interleave
       --------------
       If WCI area, and striping is enabled, interleave on bit 8
      

    Bootbus space
    =============

    |    4|     |            3|                  2|                  1|                   |
    |2|1|0|9|8|7|6|5|4|3|2|1|0|9|8|7|6|5|4|3|2|1|0|9|8|7|6|5|4|3|2|1|0|9|8|7|6|5|4|3|2|1|0|
    +-----------------------------+-------------------------------------------------------+
    |1 1 1 1 1 1 1 1 1 1 1 1 1 1 1|                      256MB Space                      |
    +-----------------------------+-------------------------------------------------------+


- Resolution:

    N/A

- Summary of part number and patch ID's 

    N/A
    
- References and bug IDs

    SunSolve Article 48201

- Additional background information

- Meta-Data/Problem categorization:

Product/Platform: SF12K/SF15K
Category:
 
- Keywords

15K, 12K, SF15K, SF12K, starcat, Non-cacheable Address Space