| biosdisk.c (51586) | biosdisk.c (53207) |
|---|---|
| 1/*- 2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 9 unchanged lines hidden (view full) --- 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * | 1/*- 2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 9 unchanged lines hidden (view full) --- 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * |
| 26 * $FreeBSD: head/sys/boot/pc98/libpc98/biosdisk.c 51586 1999-09-23 03:57:16Z kato $ | 26 * $FreeBSD: head/sys/boot/pc98/libpc98/biosdisk.c 53207 1999-11-16 00:42:18Z nyan $ |
| 27 */ 28 29/* 30 * BIOS disk device handling. 31 * 32 * Ideas and algorithms from: 33 * 34 * - NetBSD libi386/biosdisk.c --- 54 unchanged lines hidden (view full) --- 89 * BIOS unit number. 90 */ 91static struct bdinfo 92{ 93 int bd_unit; /* BIOS unit number */ 94 int bd_flags; 95 int bd_type; /* BIOS 'drive type' (floppy only) */ 96#ifdef PC98 | 27 */ 28 29/* 30 * BIOS disk device handling. 31 * 32 * Ideas and algorithms from: 33 * 34 * - NetBSD libi386/biosdisk.c --- 54 unchanged lines hidden (view full) --- 89 * BIOS unit number. 90 */ 91static struct bdinfo 92{ 93 int bd_unit; /* BIOS unit number */ 94 int bd_flags; 95 int bd_type; /* BIOS 'drive type' (floppy only) */ 96#ifdef PC98 |
| 97 int bd_da_unit; /* kernel unit number for da */ | 97 int bd_da_unit; /* kernel unit number for da */ |
| 98#endif 99} bdinfo [MAXBDDEV]; 100static int nbdinfo = 0; 101 102static int bd_getgeom(struct open_disk *od); 103static int bd_read(struct open_disk *od, daddr_t dblk, int blks, caddr_t dest); 104 105static int bd_int13probe(struct bdinfo *bd); --- 116 unchanged lines hidden (view full) --- 222 223/* 224 * Try to detect a device supported by the legacy int13 BIOS 225 */ 226 227static int 228bd_int13probe(struct bdinfo *bd) 229{ | 98#endif 99} bdinfo [MAXBDDEV]; 100static int nbdinfo = 0; 101 102static int bd_getgeom(struct open_disk *od); 103static int bd_read(struct open_disk *od, daddr_t dblk, int blks, caddr_t dest); 104 105static int bd_int13probe(struct bdinfo *bd); --- 116 unchanged lines hidden (view full) --- 222 223/* 224 * Try to detect a device supported by the legacy int13 BIOS 225 */ 226 227static int 228bd_int13probe(struct bdinfo *bd) 229{ |
| 230 |
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| 230#ifdef PC98 231 int addr; 232 if (bd->bd_flags & BD_FLOPPY){ 233 addr = 0xa155c; 234 } 235 else { 236 if ((bd->bd_unit & 0xf0) == 0x80) 237 addr = 0xa155d; --- 292 unchanged lines hidden (view full) --- 530 * a partition to start with. 531 * 532 * XXX we might want to check the label checksum. 533 */ 534 if (dev->d_kind.biosdisk.partition < 0) { 535 od->od_boff = sector; /* no partition, must be after the slice */ 536 DEBUG("opening raw slice"); 537 } else { | 231#ifdef PC98 232 int addr; 233 if (bd->bd_flags & BD_FLOPPY){ 234 addr = 0xa155c; 235 } 236 else { 237 if ((bd->bd_unit & 0xf0) == 0x80) 238 addr = 0xa155d; --- 292 unchanged lines hidden (view full) --- 531 * a partition to start with. 532 * 533 * XXX we might want to check the label checksum. 534 */ 535 if (dev->d_kind.biosdisk.partition < 0) { 536 od->od_boff = sector; /* no partition, must be after the slice */ 537 DEBUG("opening raw slice"); 538 } else { |
| 539 |
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| 538 if (bd_read(od, sector + LABELSECTOR, 1, buf)) { 539 DEBUG("error reading disklabel"); 540 error = EIO; 541 goto out; 542 } 543 DEBUG("copy %d bytes of label from %p to %p", sizeof(struct disklabel), buf + LABELOFFSET, &od->od_disklabel); 544 bcopy(buf + LABELOFFSET, &od->od_disklabel, sizeof(struct disklabel)); 545 lp = &od->od_disklabel; --- 45 unchanged lines hidden (view full) --- 591#define PREF_NONE 4 592 593static int 594bd_bestslice(struct dos_partition *dptr) 595{ 596 int i; 597 int preflevel, pref; 598 | 540 if (bd_read(od, sector + LABELSECTOR, 1, buf)) { 541 DEBUG("error reading disklabel"); 542 error = EIO; 543 goto out; 544 } 545 DEBUG("copy %d bytes of label from %p to %p", sizeof(struct disklabel), buf + LABELOFFSET, &od->od_disklabel); 546 bcopy(buf + LABELOFFSET, &od->od_disklabel, sizeof(struct disklabel)); 547 lp = &od->od_disklabel; --- 45 unchanged lines hidden (view full) --- 593#define PREF_NONE 4 594 595static int 596bd_bestslice(struct dos_partition *dptr) 597{ 598 int i; 599 int preflevel, pref; 600 |
| 599 | 601 |
| 600#ifndef PC98 601 /* 602 * Check for the historically bogus MBR found on true dedicated disks 603 */ 604 if ((dptr[3].dp_typ == DOSPTYP_386BSD) && 605 (dptr[3].dp_start == 0) && 606 (dptr[3].dp_size == 50000)) 607 return(0); --- 325 unchanged lines hidden (view full) --- 933 od->od_hds = ((v86.edx & 0xff00) >> 8) + 1; 934 od->od_sec = v86.ecx & 0x3f; 935#endif 936 937 DEBUG("unit 0x%x geometry %d/%d/%d", od->od_unit, od->od_cyl, od->od_hds, od->od_sec); 938 return(0); 939} 940 | 602#ifndef PC98 603 /* 604 * Check for the historically bogus MBR found on true dedicated disks 605 */ 606 if ((dptr[3].dp_typ == DOSPTYP_386BSD) && 607 (dptr[3].dp_start == 0) && 608 (dptr[3].dp_size == 50000)) 609 return(0); --- 325 unchanged lines hidden (view full) --- 935 od->od_hds = ((v86.edx & 0xff00) >> 8) + 1; 936 od->od_sec = v86.ecx & 0x3f; 937#endif 938 939 DEBUG("unit 0x%x geometry %d/%d/%d", od->od_unit, od->od_cyl, od->od_hds, od->od_sec); 940 return(0); 941} 942 |
| 943#ifndef PC98 |
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| 941/* | 944/* |
| 945 * Return the BIOS geometry of a given "fixed drive" in a format 946 * suitable for the legacy bootinfo structure. Since the kernel is 947 * expecting raw int 0x13/0x8 values for N_BIOS_GEOM drives, we 948 * prefer to get the information directly, rather than rely on being 949 * able to put it together from information already maintained for 950 * different purposes and for a probably different number of drives. 951 * 952 * For valid drives, the geometry is expected in the format (31..0) 953 * "000000cc cccccccc hhhhhhhh 00ssssss"; and invalid drives are 954 * indicated by returning the geometry of a "1.2M" PC-format floppy 955 * disk. And, incidentally, what is returned is not the geometry as 956 * such but the highest valid cylinder, head, and sector numbers. 957 */ 958u_int32_t 959bd_getbigeom(int bunit) 960{ 961 962 v86.ctl = V86_FLAGS; 963 v86.addr = 0x13; 964 v86.eax = 0x800; 965 v86.edx = 0x80 + bunit; 966 v86int(); 967 if (v86.efl & 0x1) 968 return 0x4f010f; 969 return ((v86.ecx & 0xc0) << 18) | ((v86.ecx & 0xff00) << 8) | 970 (v86.edx & 0xff00) | (v86.ecx & 0x3f); 971} 972#endif 973 974/* |
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| 942 * Return a suitable dev_t value for (dev). 943 * 944 * In the case where it looks like (dev) is a SCSI disk, we allow the number of 945 * IDE disks to be specified in $num_ide_disks. There should be a Better Way. 946 */ 947int 948bd_getdev(struct i386_devdesc *dev) 949{ --- 86 unchanged lines hidden --- | 975 * Return a suitable dev_t value for (dev). 976 * 977 * In the case where it looks like (dev) is a SCSI disk, we allow the number of 978 * IDE disks to be specified in $num_ide_disks. There should be a Better Way. 979 */ 980int 981bd_getdev(struct i386_devdesc *dev) 982{ --- 86 unchanged lines hidden --- |