/* $OpenBSD: memdevs.c,v 1.5 2003/06/02 05:09:14 deraadt Exp $ */ /* * Copyright (c) 1995 Theo de Raadt * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include <sys/param.h> #include <sys/conf.h> #include <sys/buf.h> #include <sys/systm.h> #include <sys/uio.h> #include <sys/malloc.h> #include <sys/device.h> #include <machine/autoconf.h> #include <machine/cpu.h> #include <mvme68k/dev/memdevs.h> /*ARGSUSED*/ int memdevrw(base, len, uio, flags) caddr_t base; int len; struct uio *uio; int flags; { vaddr_t v; int c; struct iovec *iov; int error = 0; while (uio->uio_resid > 0 && error == 0) { iov = uio->uio_iov; if (iov->iov_len == 0) { uio->uio_iov++; uio->uio_iovcnt--; if (uio->uio_iovcnt < 0) panic("memdevrw"); continue; } v = uio->uio_offset; c = min(iov->iov_len, MAXPHYS); if (v + c > len) c = len - v; /* till end of dev */ if (c == 0) return (0); error = uiomove(base + v, c, uio); } return (error); }