diff options
Diffstat (limited to 'sys/arch/mvme88k/stand/libsa/dev_disk.c')
| -rw-r--r-- | sys/arch/mvme88k/stand/libsa/dev_disk.c | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/sys/arch/mvme88k/stand/libsa/dev_disk.c b/sys/arch/mvme88k/stand/libsa/dev_disk.c new file mode 100644 index 00000000000..65c1db4ac64 --- /dev/null +++ b/sys/arch/mvme88k/stand/libsa/dev_disk.c @@ -0,0 +1,132 @@ +/* $Id: dev_disk.c,v 1.1 1997/03/03 19:30:36 rahnds Exp $ */ + +/* + * Copyright (c) 1993 Paul Kranenburg + * 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. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by Paul Kranenburg. + * 4. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission + * + * 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. + */ + +/* + * This module implements a "raw device" interface suitable for + * use by the stand-alone I/O library UFS file-system code, and + * possibly for direct access (i.e. boot from tape). + * + * The implementation is deceptively simple because it uses the + * drivers provided by the Sun PROM monitor. Note that only the + * PROM driver used to load the boot program is available here. + */ + +#include <sys/types.h> +#include <machine/mon.h> +#include <machine/saio.h> + +#include "stand.h" + +#include "dvma.h" +#include "promdev.h" + +int +disk_open(f, devname) + struct open_file *f; + char *devname; /* Device part of file name (or NULL). */ +{ + struct saioreq *sip; + int error; + +#ifdef DEBUG_PROM + printf("disk_open: %s\n", devname); +#endif + + if ((error = prom_iopen(&sip)) != 0) + return (error); + + f->f_devdata = sip; + return 0; +} + +int +disk_close(f) + struct open_file *f; +{ + struct saioreq *sip; + + sip = f->f_devdata; + prom_iclose(sip); + f->f_devdata = NULL; + return 0; +} + +int +disk_strategy(devdata, flag, dblk, size, buf, rsize) + void *devdata; + int flag; + daddr_t dblk; + u_int size; + char *buf; + u_int *rsize; +{ + struct saioreq *si; + struct boottab *ops; + char *dmabuf; + int si_flag, xcnt; + + si = devdata; + ops = si->si_boottab; + +#ifdef DEBUG_PROM + printf("disk_strategy: size=%d dblk=%d\n", size, dblk); +#else + twiddle(); +#endif + + dmabuf = dvma_mapin(buf, size); + + si->si_bn = dblk; + si->si_ma = dmabuf; + si->si_cc = size; + + si_flag = (flag == F_READ) ? SAIO_F_READ : SAIO_F_WRITE; + xcnt = (*ops->b_strategy)(si, si_flag); + dvma_mapout(dmabuf, size); + +#ifdef DEBUG_PROM + printf("disk_strategy: xcnt = %x\n", xcnt); +#endif + + if (xcnt <= 0) + return (EIO); + + *rsize = xcnt; + return (0); +} + +int +disk_ioctl() +{ + return EIO; +} + |