opensolaris man page for btopr

btopr(9F)						   Kernel Functions for Drivers 						 btopr(9F)

NAME
       btopr - convert size in bytes to size in pages (round up)

SYNOPSIS
       #include <sys/ddi.h>

       unsigned long btopr(unsigned long numbytes);

INTERFACE LEVEL
       Architecture independent level 1 (DDI/DKI).

PARAMETERS
       numbytes    Number of bytes.

DESCRIPTION
       The  btopr()  function  returns	the number of memory pages contained in the specified number of bytes memory, rounded up to the next whole
       page. For example, if the page size is 2048, then btopr(4096) returns 2, and btopr(4097) returns 3.

RETURN VALUES
       The return value is always the number of pages. There are no invalid input values, and therefore no error return values.

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

SEE ALSO
       btop(9F), ddi_btopr(9F), ptob(9F)

       Writing Device Drivers

SunOS 5.11							    16 Jan 2006 							 btopr(9F)