Annotation of sys/arch/alpha/stand/boot/disk.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: disk.c,v 1.11 2003/06/02 23:27:44 millert Exp $ */
! 2: /* $NetBSD: disk.c,v 1.6 1997/04/06 08:40:33 cgd Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1992, 1993
! 6: * The Regents of the University of California. All rights reserved.
! 7: *
! 8: * This code is derived from software contributed to Berkeley by
! 9: * Van Jacobson of Lawrence Berkeley Laboratory and Ralph Campbell.
! 10: *
! 11: * Redistribution and use in source and binary forms, with or without
! 12: * modification, are permitted provided that the following conditions
! 13: * are met:
! 14: * 1. Redistributions of source code must retain the above copyright
! 15: * notice, this list of conditions and the following disclaimer.
! 16: * 2. Redistributions in binary form must reproduce the above copyright
! 17: * notice, this list of conditions and the following disclaimer in the
! 18: * documentation and/or other materials provided with the distribution.
! 19: * 3. Neither the name of the University nor the names of its contributors
! 20: * may be used to endorse or promote products derived from this software
! 21: * without specific prior written permission.
! 22: *
! 23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 33: * SUCH DAMAGE.
! 34: *
! 35: * @(#)rz.c 8.1 (Berkeley) 6/10/93
! 36: */
! 37:
! 38: #include <lib/libsa/stand.h>
! 39:
! 40: #include <sys/param.h>
! 41: #include <sys/disklabel.h>
! 42:
! 43: #include <machine/rpb.h>
! 44: #include <machine/prom.h>
! 45:
! 46: #include "disk.h"
! 47:
! 48: struct disk_softc {
! 49: int sc_fd; /* PROM channel number */
! 50: int sc_ctlr; /* controller number */
! 51: int sc_unit; /* disk unit number */
! 52: int sc_part; /* disk partition number */
! 53: struct disklabel sc_label; /* disk label for this disk */
! 54: };
! 55:
! 56: int
! 57: diskstrategy(devdata, rw, bn, reqcnt, addrvoid, cnt)
! 58: void *devdata;
! 59: int rw;
! 60: daddr_t bn;
! 61: size_t reqcnt;
! 62: void *addrvoid;
! 63: size_t *cnt; /* out: number of bytes transferred */
! 64: {
! 65: char *addr = addrvoid;
! 66: struct disk_softc *sc;
! 67: struct partition *pp;
! 68: prom_return_t ret;
! 69: int s;
! 70:
! 71: if ((reqcnt & 0xffffff) != reqcnt ||
! 72: reqcnt == 0)
! 73: asm("call_pal 0");
! 74:
! 75: twiddle();
! 76:
! 77: /* Partial-block transfers not handled. */
! 78: if (reqcnt & (DEV_BSIZE - 1)) {
! 79: *cnt = 0;
! 80: return (EINVAL);
! 81: }
! 82:
! 83: sc = (struct disk_softc *)devdata;
! 84: pp = &sc->sc_label.d_partitions[sc->sc_part];
! 85:
! 86: ret.bits = prom_read(sc->sc_fd, reqcnt, addr, bn + pp->p_offset);
! 87: if (ret.u.status)
! 88: return (EIO);
! 89: *cnt = ret.u.retval;
! 90: return (0);
! 91: }
! 92:
! 93: int
! 94: diskopen(f, ctlr, unit, part)
! 95: struct open_file *f;
! 96: int ctlr, unit, part;
! 97: {
! 98: struct disklabel *lp;
! 99: prom_return_t ret;
! 100: size_t cnt;
! 101: int devlen, i;
! 102: char *msg, buf[DEV_BSIZE], devname[32];
! 103: struct disk_softc *sc;
! 104:
! 105: if (unit >= 16 || part >= MAXPARTITIONS)
! 106: return (ENXIO);
! 107: /*
! 108: * XXX
! 109: * We don't know what device names look like yet,
! 110: * so we can't change them.
! 111: */
! 112: ret.bits = prom_getenv(PROM_E_BOOTED_DEV, devname, sizeof(devname));
! 113: devlen = ret.u.retval;
! 114:
! 115: ret.bits = prom_open(devname, devlen);
! 116: if (ret.u.status == 2)
! 117: return (ENXIO);
! 118: if (ret.u.status == 3)
! 119: return (EIO);
! 120:
! 121: sc = alloc(sizeof(struct disk_softc));
! 122: bzero(sc, sizeof(struct disk_softc));
! 123: f->f_devdata = (void *)sc;
! 124:
! 125: sc->sc_fd = ret.u.retval;
! 126: sc->sc_ctlr = ctlr;
! 127: sc->sc_unit = unit;
! 128: sc->sc_part = part;
! 129:
! 130: /* Try to read disk label and partition table information. */
! 131: lp = &sc->sc_label;
! 132: lp->d_secsize = DEV_BSIZE;
! 133: lp->d_secpercyl = 1;
! 134: lp->d_npartitions = MAXPARTITIONS;
! 135: lp->d_partitions[part].p_offset = 0;
! 136: lp->d_partitions[part].p_size = 0x7fffffff;
! 137: i = diskstrategy(sc, F_READ,
! 138: (daddr_t)LABELSECTOR, DEV_BSIZE, buf, &cnt);
! 139: if (i || cnt != DEV_BSIZE) {
! 140: printf("disk%d: error reading disk label\n", unit);
! 141: goto bad;
! 142: } else if (((struct disklabel *)(buf + LABELOFFSET))->d_magic !=
! 143: DISKMAGIC) {
! 144: /* No label at all. Fake all partitions as whole disk. */
! 145: for (i = 0; i < MAXPARTITIONS; i++) {
! 146: lp->d_partitions[part].p_offset = 0;
! 147: lp->d_partitions[part].p_size = 0x7fffffff;
! 148: }
! 149: } else {
! 150: msg = getdisklabel(buf + LABELOFFSET, lp);
! 151: if (msg) {
! 152: printf("disk%d: %s\n", unit, msg);
! 153: goto bad;
! 154: }
! 155: }
! 156:
! 157: if (part >= lp->d_npartitions || lp->d_partitions[part].p_size == 0) {
! 158: bad: free(sc, sizeof(struct disk_softc));
! 159: return (ENXIO);
! 160: }
! 161: return (0);
! 162: }
! 163:
! 164: diskclose(f)
! 165: struct open_file *f;
! 166: {
! 167: struct disk_softc *sc;
! 168:
! 169: sc = f->f_devdata;
! 170: (void)prom_close(sc->sc_fd);
! 171:
! 172: free(sc, sizeof(struct disk_softc));
! 173: f->f_devdata = NULL;
! 174: return (0);
! 175: }
CVSweb
![[BACK]](/icons/back.gif){kind=icon}
Return to disk.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / sys / arch / alpha / stand / boot