52 #define	BIOS_NUMDRIVES		0x475
56 #define	DT_ATAPI	0x10	/* disk type for ATAPI floppies */
57 #define	WDMAJOR		0	/* major numbers for devices we frontend for */
67 #define	CMD_RESET	0x0000
68 #define	CMD_READ_CHS	0x0200
69 #define	CMD_WRITE_CHS	0x0300
70 #define	CMD_READ_PARAM	0x0800
71 #define	CMD_DRIVE_TYPE	0x1500
72 #define	CMD_CHECK_EDD	0x4100
73 #define	CMD_READ_LBA	0x4200
74 #define	CMD_WRITE_LBA	0x4300
75 #define	CMD_EXT_PARAM	0x4800
76 #define	CMD_CD_GET_STATUS 0x4b01
78 #define	DISK_BIOS	0x13
83 #define	DPRINTF(fmt, args...)	((void)0)
113 #define	BD_MODEINT13	0x0000
114 #define	BD_MODEEDD1	0x0001
115 #define	BD_MODEEDD3	0x0002
117 #define	BD_MODEMASK	0x0003
118 #define	BD_FLOPPY	0x0004
119 #define	BD_CDROM	0x0008
120 #define	BD_NO_MEDIA	0x0010
128 #define	BD_RD		0
218 	unit = 0;  in bd_get_bdinfo()
237 	DPRINTF("looking for bios device 0x%x", biosdev);  in bd_bios2unit()
238 	for (i = 0; bdi[i] != NULL; i++) {  in bd_bios2unit()
239 		unit = 0;  in bd_bios2unit()
242 				DPRINTF("bd unit %d is BIOS device 0x%x", unit,  in bd_bios2unit()
263 	unit = 0;  in bd_unit2bios()
280 	for (drive = 0; drive < MAXBDDEV; drive++) {  in fd_count()
292 		if ((v86.eax & 0x300) == 0)  in fd_count()
309 	for (unit = 0; unit < numfd; unit++) {  in fd_init()
318 		if (bd_get_diskinfo_std(bd) != 0) {  in fd_init()
322 		if (bd->bd_sectors == 0)  in fd_init()
332 	return (0);  in fd_init()
343 	base = 0x80;  in bd_init()
344 	for (unit = 0; unit < *(unsigned char *)PTOV(BIOS_NUMDRIVES); unit++) {  in bd_init()
363 	return (0);  in bd_init()
375 	return (0);  in cd_init()
387 	(void) memset(&bc_sp, 0, sizeof (bc_sp));  in bd_get_diskinfo_cd()
399 	if ((v86.eax & 0xff00) == 0 &&  in bd_get_diskinfo_cd()
401 		bd->bd_cyl = ((bc_sp.sp_cylsec & 0xc0) << 2) +  in bd_get_diskinfo_cd()
402 		    ((bc_sp.sp_cylsec & 0xff00) >> 8) + 1;  in bd_get_diskinfo_cd()
403 		bd->bd_sec = bc_sp.sp_cylsec & 0x3f;  in bd_get_diskinfo_cd()
407 		if (bc_sp.sp_bootmedia & 0x0F) {  in bd_get_diskinfo_cd()
414 			ret = 0;  in bd_get_diskinfo_cd()
421 	if (ret != 0 && bd->bd_unit >= 0x88) {  in bd_get_diskinfo_cd()
422 		bd->bd_cyl = 0;  in bd_get_diskinfo_cd()
427 		bd->bd_sectors = 0;  in bd_get_diskinfo_cd()
428 		ret = 0;  in bd_get_diskinfo_cd()
440 	if (bd->bd_sectors == 0)  in bd_get_diskinfo_cd()
450 	int nbcinfo = 0;  in bc_add()
459 	if (bd_get_diskinfo_cd(bd) < 0) {  in bc_add()
468         return(0);  in bc_add()
472  * Return EDD version or 0 if EDD is not supported on this drive.
478 	if (unit < 0x80)  in bd_check_extensions()
479 		return (0);  in bd_check_extensions()
490 	    (v86.ebx & 0xffff) != EDD_INSTALLED) /* signature */  in bd_check_extensions()
491 		return (0);  in bd_check_extensions()
494 	if ((v86.ecx & EDD_INTERFACE_FIXED_DISK) == 0)  in bd_check_extensions()
495 		return (0);  in bd_check_extensions()
497 	return ((v86.eax >> 8) & 0xff);  in bd_check_extensions()
512  * Read CHS info. Return 0 on success, error otherwise.
524 	if (V86_CY(v86.efl) && ((v86.eax & 0xff00) != 0))  in bd_get_diskinfo_std()
525 		return ((v86.eax & 0xff00) >> 8);  in bd_get_diskinfo_std()
528 	if ((v86.ecx & 0x3f) == 0)  in bd_get_diskinfo_std()
529 		return (0x60);  in bd_get_diskinfo_std()
531 	bd->bd_cyl = ((v86.ecx & 0xc0) << 2) + ((v86.ecx & 0xff00) >> 8) + 1;  in bd_get_diskinfo_std()
533 	bd->bd_hds = ((v86.edx & 0xff00) >> 8) + 1;  in bd_get_diskinfo_std()
534 	bd->bd_sec = v86.ecx & 0x3f;  in bd_get_diskinfo_std()
538 	return (0);  in bd_get_diskinfo_std()
542  * Read EDD info. Return 0 on success, error otherwise.
571 	if (V86_CY(v86.efl) && ((v86.eax & 0xff00) != 0))  in bd_get_diskinfo_ext()
572 		return ((v86.eax & 0xff00) >> 8);  in bd_get_diskinfo_ext()
582 	    (params->sector_size % BIOSDISK_SECSIZE) == 0)  in bd_get_diskinfo_ext()
589 	if (params->sectors != 0) {  in bd_get_diskinfo_ext()
597 	return (0);  in bd_get_diskinfo_ext()
610 	if ((bd->bd_flags & BD_CDROM) != 0) {  in bd_int13probe()
611 		return (bd_get_diskinfo_cd(bd) == 0);  in bd_int13probe()
615 	if (edd == 0)  in bd_int13probe()
617 	else if (edd < 0x30)  in bd_int13probe()
623 	if (bd->bd_sectorsize == 0)  in bd_int13probe()
630 	if (bd->bd_unit < 0x80) {  in bd_int13probe()
640 		if (V86_CY(v86.efl) || (v86.eax & 0x300) == 0)  in bd_int13probe()
645 	if (edd != 0)  in bd_int13probe()
647 	if (ret != 0 || bd->bd_sectors == 0)  in bd_int13probe()
650 	if (ret != 0 && bd->bd_unit < 0x80) {  in bd_int13probe()
658 		ret = 0;  in bd_int13probe()
661 	if (ret != 0) {  in bd_int13probe()
662 		if (bd->bd_sectors != 0 && edd != 0) {  in bd_int13probe()
671 			if ((bd->bd_flags & BD_FLOPPY) != 0)  in bd_int13probe()
682 	if (bd->bd_sec == 0)  in bd_int13probe()
684 	if (bd->bd_hds == 0)  in bd_int13probe()
687 	if (bd->bd_sectors == 0)  in bd_int13probe()
690 	DPRINTF("unit 0x%x geometry %d/%d/%d\n", bd->bd_unit, bd->bd_cyl,  in bd_int13probe()
702 	i = 0;  in bd_count()
717 	int i, ret = 0;  in bd_print_common()
721 		return (0);  in bd_print_common()
724 	if ((ret = pager_output("\n")) != 0)  in bd_print_common()
750 		if ((ret = pager_output(line)) != 0)  in bd_print_common()
765 		    bd->bd_sectorsize) == 0) {  in bd_print_common()
770 			if (ret != 0)  in bd_print_common()
811 		return (0);  in bd_disk_get_sectors()
817 	disk.d_offset = 0;  in bd_disk_get_sectors()
820 	if (disk_open(&disk, size, bd->bd_sectorsize) == 0) {  in bd_disk_get_sectors()
864 	if (bd->bd_open == 0)  in bd_open()
868 	rc = 0;  in bd_open()
872 		if (rc != 0) {  in bd_open()
874 			if (bd->bd_open == 0) {  in bd_open()
889 	int rc = 0;  in bd_close()
897 	if (bd->bd_open == 0) {  in bd_close()
934 	return (0);  in bd_ioctl()
955 	offset = 0;  in bd_strategy()
986 	if (size == 0 || (size % BIOSDISK_SECSIZE) != 0) {  in bd_realstrategy()
1010 	if (blks == 0 || (size % bd->bd_sectorsize) != 0)  in bd_realstrategy()
1017 		*rsize = 0;  in bd_realstrategy()
1023 	d_offset = 0;  in bd_realstrategy()
1024 	disk_blocks = 0;  in bd_realstrategy()
1026 		if (disk_ioctl(dev, DIOCGMEDIASIZE, &disk_blocks) == 0) {  in bd_realstrategy()
1032 	if (disk_blocks == 0)  in bd_realstrategy()
1058 		if (bio_size / bd->bd_sectorsize == 0)  in bd_realstrategy()
1065 	rc = 0;  in bd_realstrategy()
1066 	while (blks > 0) {  in bd_realstrategy()
1076 			if ((rc = bd_io(dev, bd, dblk, x, bbuf, BD_RD)) != 0) {  in bd_realstrategy()
1085 			if (blkoff != 0) {  in bd_realstrategy()
1111 			if ((rc = bd_io(dev, bd, dblk, x, bbuf, BD_WR)) != 0) {  in bd_realstrategy()
1123 		blkoff = 0;  in bd_realstrategy()
1154 		v86.eax = CMD_WRITE_LBA; /* maybe Write with verify 0x4302? */  in bd_edd_io()
1165 	return (0);  in bd_edd_io()
1197 	v86.ecx = ((cyl & 0xff) << 8) | ((cyl & 0x300) >> 2) | sec;  in bd_chs_io()
1205 	return (0);  in bd_chs_io()
1213 	bd_edd_io(bd, 0xffffffff, 1, (caddr_t)buf, BD_RD);  in bd_io_workaround()
1225 	if (blks < 0)  in bd_io()
1239 	if (dowrite == BD_RD && dblk >= 0x100000000)  in bd_io()
1241 	for (retry = 0; retry < 3; retry++) {  in bd_io()
1247 		if (result == 0) {  in bd_io()
1262 		if (result == 0x20 || result == 0x31 || result == 0x80) {  in bd_io()
1268 	if (result != 0 && (bd->bd_flags & BD_NO_MEDIA) == 0) {  in bd_io()
1270 			printf("%s%d: Write %d sector(s) from %p (0x%x) "  in bd_io()
1271 			    "to %lld: 0x%x\n", dev->dd.d_dev->dv_name,  in bd_io()
1276 			    "(0x%x): 0x%x\n", dev->dd.d_dev->dv_name,  in bd_io()
1305 	slice = 0;  in bd_getdev()
1306 	partition = 0;  in bd_getdev()
1320 		    bd->bd_sectorsize) != 0)	/* oops, not a viable device */  in bd_getdev()
1328 	if (biosdev < 0x80) {  in bd_getdev()
1342 	unit = biosdev & 0x7f;  in bd_getdev()
1355 		unit = 0;       /* XXX */  in bd_getdev()
1360 		i = strtol(nip, &cp, 0);  in bd_getdev()
1362 		if ((cp != nip) && (*cp == 0))  in bd_getdev()
1367 	DPRINTF("dev is 0x%x\n", rootdev);  in bd_getdev()