Annotation of sys/arch/mvme68k/stand/bootst/dev_tape.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: dev_tape.c,v 1.3 2002/03/14 03:15:56 millert Exp $ */
! 2: /* $NetBSD: dev_tape.c,v 1.2 1995/10/17 22:58:20 gwr Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1993 Paul Kranenburg
! 6: * All rights reserved.
! 7: *
! 8: * Redistribution and use in source and binary forms, with or without
! 9: * modification, are permitted provided that the following conditions
! 10: * are met:
! 11: * 1. Redistributions of source code must retain the above copyright
! 12: * notice, this list of conditions and the following disclaimer.
! 13: * 2. Redistributions in binary form must reproduce the above copyright
! 14: * notice, this list of conditions and the following disclaimer in the
! 15: * documentation and/or other materials provided with the distribution.
! 16: * 3. All advertising materials mentioning features or use of this software
! 17: * must display the following acknowledgement:
! 18: * This product includes software developed by Paul Kranenburg.
! 19: * 4. The name of the author may not be used to endorse or promote products
! 20: * derived from this software without specific prior written permission
! 21: *
! 22: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 23: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 24: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 25: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
! 26: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 27: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 28: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 29: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 30: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 31: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 32: */
! 33:
! 34: /*
! 35: * This module implements a "raw device" interface suitable for
! 36: * use by the stand-alone I/O library UFS file-system code, and
! 37: * possibly for direct access (i.e. boot from tape).
! 38: */
! 39:
! 40: #include <sys/types.h>
! 41: #include <machine/prom.h>
! 42:
! 43: #include "stand.h"
! 44: #include "libsa.h"
! 45:
! 46:
! 47: extern int debug;
! 48:
! 49: struct mvmeprom_dskio tape_ioreq;
! 50:
! 51: /*
! 52: * This is a special version of devopen() for tape boot.
! 53: * In this version, the file name is a numeric string of
! 54: * one digit, which is passed to the device open so it
! 55: * can open the appropriate tape segment.
! 56: */
! 57: int
! 58: devopen(f, fname, file)
! 59: struct open_file *f;
! 60: const char *fname; /* normally "1" */
! 61: char **file;
! 62: {
! 63: struct devsw *dp;
! 64: int error;
! 65:
! 66: *file = (char *)fname;
! 67: dp = &devsw[0];
! 68: f->f_dev = dp;
! 69:
! 70: /* The following will call tape_open() */
! 71: return (dp->dv_open(f, fname));
! 72: }
! 73:
! 74: int
! 75: tape_open(f, fname)
! 76: struct open_file *f;
! 77: char *fname; /* partition number, i.e. "1" */
! 78: {
! 79: int error, part;
! 80: struct mvmeprom_dskio *ti;
! 81:
! 82: /*
! 83: * Set the tape segment number to the one indicated
! 84: * by the single digit fname passed in above.
! 85: */
! 86: if ((fname[0] < '0') && (fname[0] > '9')) {
! 87: return ENOENT;
! 88: }
! 89: part = fname[0] - '0';
! 90:
! 91: /*
! 92: * Setup our part of the saioreq.
! 93: * (determines what gets opened)
! 94: */
! 95: ti = &tape_ioreq;
! 96: bzero((caddr_t)ti, sizeof(*ti));
! 97:
! 98: ti->ctrl_lun = bugargs.ctrl_lun;
! 99: ti->dev_lun = bugargs.dev_lun;
! 100: ti->status = 0;
! 101: ti->pbuffer = NULL;
! 102: ti->blk_num = part;
! 103: ti->blk_cnt = 0;
! 104: ti->flag = 0;
! 105: ti->addr_mod = 0;
! 106:
! 107: f->f_devdata = ti;
! 108:
! 109: return (error);
! 110: }
! 111:
! 112: int
! 113: tape_close(f)
! 114: struct open_file *f;
! 115: {
! 116: struct mvmeprom_dskio *ti;
! 117:
! 118:
! 119: ti = f->f_devdata;
! 120: f->f_devdata = NULL;
! 121: return 0;
! 122: }
! 123:
! 124: #define MVMEPROM_SCALE (512/MVMEPROM_BLOCK_SIZE)
! 125:
! 126: int
! 127: tape_strategy(devdata, flag, dblk, size, buf, rsize)
! 128: void *devdata;
! 129: int flag;
! 130: daddr_t dblk;
! 131: u_int size;
! 132: char *buf;
! 133: u_int *rsize;
! 134: {
! 135: struct mvmeprom_dskio *ti;
! 136: int ret;
! 137:
! 138: ti = devdata;
! 139:
! 140: if (flag != F_READ)
! 141: return(EROFS);
! 142:
! 143: ti->status = 0;
! 144: ti->pbuffer = buf;
! 145: /* don't change block #, set in open */
! 146: ti->blk_cnt = size / (512 / MVMEPROM_SCALE);
! 147:
! 148: ret = mvmeprom_diskrd(ti);
! 149:
! 150: if (ret != 0)
! 151: return (EIO);
! 152:
! 153: *rsize = (ti->blk_cnt / MVMEPROM_SCALE) * 512;
! 154: ti->flag |= IGNORE_FILENUM; /* ignore next time */
! 155:
! 156: return (0);
! 157: }
! 158:
! 159: int
! 160: tape_ioctl()
! 161: {
! 162: return EIO;
! 163: }
! 164:
CVSweb
![[BACK]](/icons/back.gif){kind=icon}
Return to dev_tape.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / sys / arch / mvme68k / stand / bootst