Manual Pages for UNIX Operating System command usage for man ddi_dev_regsize

Kernel Functions for Drivers                  ddi_dev_regsize(9F)



NAME
     ddi_dev_regsize - return the size of a device's register

SYNOPSIS
     #include 
     #include 
     #include 



     int ddi_dev_regsize(dev_info_t *dip, uint_t rnumber, off_t *resultp);


INTERFACE LEVEL
     Solaris DDI specific (Solaris DDI).

PARAMETERS
     dip        A pointer to the device's dev_info structure.


     rnumber    The ordinal register number. Device registers are
                associated  with a dev_info and are enumerated in
                arbitrary sets from 0 on up. The number of regis-
                ters  a  device has can be determined from a call
                to ddi_dev_nregs(9F).


     resultp    Pointer to an integer that  holds  the  size,  in
                bytes, of the described register (if it exists).


DESCRIPTION
     The ddi_dev_regsize() function returns the size,  in  bytes,
     of the device register specified by dip and rnumber. This is
     useful when, for example, one of the registers  is  a  frame
     buffer with a varying size known only to its proms.

RETURN VALUES
     The ddi_dev_regsize() function returns:

     DDI_SUCCESS    A successful return. The size, in  bytes,  of
                    the specified register, is set in resultp.


     DDI_FAILURE    An invalid (nonexistent) register number  was
                    specified.


CONTEXT
     The ddi_dev_regsize() function  can  be  called  from  user,
     interrupt, or kernel context.




SunOS 5.11          Last change: 16 Jan 2006                    1






Kernel Functions for Drivers                  ddi_dev_regsize(9F)



SEE ALSO
     ddi_dev_nintrs(9F), ddi_dev_nregs(9F)


     Writing Device Drivers


















































SunOS 5.11          Last change: 16 Jan 2006                    2