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ddi_dev_regsize (9)

>> ddi_dev_regsize (9) ( Solaris man: Ядро )

NAME

ddi_dev_regsize - return the size
of a device's register

SYNOPSIS

#include <sys/conf.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>



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 registers 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.