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isbad(), for Chuck's new xd driver.

This commit is contained in:
pk 1995-06-26 22:57:29 +00:00
parent 34c8ad8c30
commit 3c17e9e63f
1 changed files with 27 additions and 1 deletions
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28
sys/arch/sparc/sparc/disksubr.c
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@ -1,4 +1,4 @@
/* $NetBSD: disksubr.c,v 1.4 1994/11/20 20:54:16 deraadt Exp $ */
/* $NetBSD: disksubr.c,v 1.5 1995/06/26 22:57:29 pk Exp $ */
/*
* Copyright (c) 1994 Theo de Raadt
@ -36,6 +36,7 @@
#include <sys/device.h>
#include <sys/disklabel.h>
#include <sys/disk.h>
#include <sys/dkbad.h>
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
@ -402,3 +403,28 @@ sun_dkioctl(dk, cmd, data, partition)
}
return (0);
}
/*
* Search the bad sector table looking for the specified sector.
* Return index if found.
* Return -1 if not found.
*/
int
isbad(bt, cyl, trk, sec)
register struct dkbad *bt;
{
register int i;
register long blk, bblk;
blk = ((long)cyl << 16) + (trk << 8) + sec;
for (i = 0; i < 126; i++) {
bblk = ((long)bt->bt_bad[i].bt_cyl << 16) +
bt->bt_bad[i].bt_trksec;
if (blk == bblk)
return (i);
if (blk < bblk || bblk < 0)
break;
}
return (-1);
}