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eisa (4)
  • >> eisa (4) ( Solaris man: Специальные файлы /dev/* )
  • 
    NAME
         sysbus, isa, eisa - device tree properties for ISA and  EISA
         bus device drivers
    
    DESCRIPTION
         Solaris (Intel Platform Edition) supports the ISA  and  EISA
         buses  as the system bus. Drivers for devices on these buses
         use the device tree built by the booting system to  retrieve
         the  necessary  system  resources used by the driver.  These
         resources include device I/O port addresses,  any  interrupt
         capabilities
          that the device may have, any DMA channels it may  require,
         and any memory-mapped addresses it may occupy.
    
         Configuration files for ISA and EISA device drivers are only
         necessary to describe properties used by a particular driver
         that are not part of the standard properties  found  in  the
         device  tree. See driver.conf(4) for further details of con-
         figuration file syntax.
    
         The ISA and EISA nexus drivers all belong to  class  sysbus.
         All bus drivers of class sysbus recognize the following pro-
         perties:
    
         interrupts
               An arbitrary-length array where each  element  of  the
               array  represents  a  hardware interrupt (IRQ) that is
               used by the device.  In general, this array  only  has
               one  entry  unless  a particular device uses more than
               one IRQ.
    
               Solaris defaults all ISA and EISA interrupts to IPL 5.
               This  interrupt  priority may be overridden by placing
               an interrupt-priorities property in a .conf  file  for
               the  driver.  Each  entry in the array of integers for
               the interrupt-priorities property is  matched  one-to-
               one  with  the  elements in the interrupts property to
               specify the IPL value that will be used by the  system
               for  this interrupt in this driver. This is the prior-
               ity that this device's interrupt handler will  receive
               relative to the interrupt handlers of other drivers.
                The priority is an integer from  1 to 16.  Generally,
               disks  are  assigned  a  priority of 5, while mice and
               printers are lower, and serial  communication  devices
               are  higher, typically 7. 10 is reserved by the system
               and must not be used.  Priorities 11 and  greater  are
               high  level  priorities  and  are generally not recom-
               mended (see  ddi_intr_hilevel(9F)).
    
               The driver can refer to the elements of this array  by
               index  using  ddi_add_intr(9F).   The  index  into the
               array  is  passed  as   the    inumber   argument   of
               ddi_add_intr().
    
               Only devices that generate  interrupts  will  have  an
               interrupts property.
    
         reg   An arbitrary-length array where each  element  of  the
               array  consists  of a 3-tuple of integers.  Each array
               element describes a contiguous  memory  address  range
               associated with the device on the bus.
    
               The first integer of the tuple  specifies  the  memory
               type,  0  specifies  a memory range and 1 specifies an
               I/O range.  The  second  integer  specifies  the  base
               address of the memory range. The third integer of each
               3-tuple specifies  the size, in bytes, of the mappable
               region.
    
               The driver can refer to the elements of this array  by
               index,   and   construct   kernel  mappings  to  these
               addresses using ddi_map_regs(9F). The index  into  the
               array   is   passed   as   the   rnumber  argument  of
               ddi_map_regs().
    
               All  sysbus devices will  have  reg  properties.   The
               first tuple of this property  is used to construct the
               address part of the device name  under   /devices.  In
               the case of Plug and Play ISA devices, the first tuple
               is a special tuple  that  does  not  denote  a  memory
               range,  but  is  used by the system only to create the
               address part of the device name.  This  special  tuple
               can be recognized by determining if the top bit of the
               first integer is set to a one.
    
               The order of the tuples in the reg property is  deter-
               mined by the boot system probe code and depends on the
               characteristics of each particular  device.   However,
               the  reg  property  will  maintain  the  same order of
               entries from system boot to system boot.   The  recom-
               mended way to determine the reg property for a partic-
               ular device is to use the  prtconf(1M)  command  after
               installing  the  particular device.  The output of the
               prtconf command can be examined to determine  the  reg
               property for any installed device.
    
               You can use the ddi_get* and ddi_put* family of  func-
               tions  to  access  register  space  from  a high-level
               interrupt context.
    
         dma-channels
               A list of integers that  specifies  the  DMA  channels
               used  by this device.  Only devices that use DMA chan-
               nels will have a dma-channels property.
    
         It is recommended that drivers for devices connected to  the
         system bus recognize the following standard property names:
    
         slot  The number of  the  slot  containing  the  device,  if
               known.  (Only for EISA devices).
    
    ATTRIBUTES
         See attributes(5) for descriptions of the  following  attri-
         butes:
    
         ____________________________________________________________
        |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
        |_____________________________|_____________________________|
        | Architecture                | IA                          |
        |_____________________________|_____________________________|
    
    
    SEE ALSO
         prtconf(1M),   driver.conf(4),    scsi(4),    attributes(5),
         ddi_add_intr(9F),   ddi_intr_hilevel(9F),  ddi_map_regs(9F),
         ddi_prop_op(9F)
    
         Writing Device Drivers
    
    
    
    


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