'\" te
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.TH btopr 9F "16 Jan 2006" "SunOS 5.11" "Kernel Functions for Drivers"
.SH NAME
btopr \- convert size in bytes to size in pages (round up)
.SH SYNOPSIS
.LP
.nf
#include <sys/ddi.h>



\fBunsigned long\fR \fBbtopr\fR(\fBunsigned long\fR \fInumbytes\fR);
.fi

.SH INTERFACE LEVEL
.sp
.LP
Architecture independent level 1 (DDI/DKI).
.SH PARAMETERS
.sp
.ne 2
.mk
.na
\fB\fInumbytes\fR\fR
.ad
.RS 12n
.rt  
Number of bytes.
.RE

.SH DESCRIPTION
.sp
.LP
The \fBbtopr()\fR 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 \fBbtopr(4096)\fR returns \fB2\fR, and
\fBbtopr(4097)\fR returns \fB3\fR.
.SH RETURN VALUES
.sp
.LP
The return value is always the number of pages. There are no invalid input
values, and therefore no error return values.
.SH CONTEXT
.sp
.LP
The \fBbtopr()\fR function can be called from user, interrupt, or kernel
context.
.SH SEE ALSO
.sp
.LP
\fBbtop\fR(9F), \fBddi_btopr\fR(9F), \fBptob\fR(9F)
.sp
.LP
\fIWriting Device Drivers\fR