freebsd-skq/share/man/man9/store.9

.\"	$NetBSD: store.9,v 1.2 1996/01/09 21:59:27 perry Exp $
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.\" Copyright (c) 1996 Jason R. Thorpe.
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.\" This code is derived from software contributed by Kenneth Stailey.
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.\"	This product includes software developed for the NetBSD Project
.\"	by Jason R. Thorpe.
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.Dd October 5, 2009
.Dt STORE 9
.Os
.Sh NAME
.Nm store ,
.Nm subyte ,
.Nm suswintr ,
.Nm suword
.Nd store data to user-space
.Sh SYNOPSIS
.In sys/types.h
.In sys/time.h
.In sys/systm.h
.Ft int
.Fn subyte "void *base" "int byte"
.Ft int
.Fn suword "void *base" "long word"
.Ft int
.Fn suword16 "void *base" "int word"
.Ft int
.Fn suword32 "void *base" "int32_t word"
.Ft int
.Fn suword64 "void *base" "int64_t word"
.In sys/resourcevar.h
.Ft int
.Fn suswintr "void *base" "int word"
.Sh DESCRIPTION
The
.Nm
functions are designed to copy small amounts of data to user-space.
.Pp
The
.Nm
routines provide the following functionality:
.Bl -tag -width "suswintr()"
.It Fn subyte
Stores a byte of data to the user-space address
.Pa base .
.It Fn suword
Stores a word of data to the user-space address
.Pa base .
.It Fn suword16
Stores 16 bits of data to the user-space address
.Pa base .
.It Fn suword32
Stores 32 bits of data to the user-space address
.Pa base .
.It Fn suword64
Stores 64 bits of data to the user-space address
.Pa base .
.It Fn suswintr
Stores a short word of data to the user-space address
.Pa base .
This function is safe to call during an interrupt context.
.El
.Sh RETURN VALUES
The
.Nm
functions return 0 on success or -1 on failure.
.Sh SEE ALSO
.Xr copy 9 ,
.Xr fetch 9