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).

ARGUMENTS

numbytes

Number of bytes.

DESCRIPTION

btopr( ) 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

btopr( ) can be called from user or interrupt context.

SEE ALSO

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

Writing Device Drivers