| biosdisk.c (43205) | biosdisk.c (48083) |
|---|---|
| 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 * $Id: biosdisk.c,v 1.22 1999/01/24 06:03:44 msmith Exp $ | 26 * $Id: biosdisk.c,v 1.23 1999/01/25 23:07:02 rnordier Exp $ |
| 27 */ 28 29/* 30 * BIOS disk device handling. 31 * 32 * Ideas and algorithms from: 33 * 34 * - NetBSD libi386/biosdisk.c --- 707 unchanged lines hidden (view full) --- 742 od->od_hds = ((v86.edx & 0xff00) >> 8) + 1; 743 od->od_sec = v86.ecx & 0x3f; 744 745 DEBUG("unit 0x%x geometry %d/%d/%d", od->od_unit, od->od_cyl, od->od_hds, od->od_sec); 746 return(0); 747} 748 749/* | 27 */ 28 29/* 30 * BIOS disk device handling. 31 * 32 * Ideas and algorithms from: 33 * 34 * - NetBSD libi386/biosdisk.c --- 707 unchanged lines hidden (view full) --- 742 od->od_hds = ((v86.edx & 0xff00) >> 8) + 1; 743 od->od_sec = v86.ecx & 0x3f; 744 745 DEBUG("unit 0x%x geometry %d/%d/%d", od->od_unit, od->od_cyl, od->od_hds, od->od_sec); 746 return(0); 747} 748 749/* |
| 750 * Return the BIOS geometry of a given "fixed drive" in a format 751 * suitable for the legacy bootinfo structure. Since the kernel is 752 * expecting raw int 0x13/0x8 values for N_BIOS_GEOM drives, we 753 * prefer to get the information directly, rather than rely on being 754 * able to put it together from information already maintained for 755 * different purposes and for a probably different number of drives. 756 * 757 * For valid drives, the geometry is expected in the format (31..0) 758 * "000000cc cccccccc hhhhhhhh 00ssssss"; and invalid drives are 759 * indicated by returning the geometry of a "1.2M" PC-format floppy 760 * disk. And, incidentally, what is returned is not the geometry as 761 * such but the highest valid cylinder, head, and sector numbers. 762 */ 763u_int32_t 764bd_getbigeom(int bunit) 765{ 766 767 v86.ctl = V86_FLAGS; 768 v86.addr = 0x13; 769 v86.eax = 0x800; 770 v86.edx = 0x80 + bunit; 771 v86int(); 772 if (v86.efl & 0x1) 773 return 0x4f010f; 774 return ((v86.ecx & 0xc0) << 18) | ((v86.ecx & 0xff00) << 8) | 775 (v86.edx & 0xff00) | (v86.ecx & 0x3f); 776} 777 778/* |
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| 750 * Return a suitable dev_t value for (dev). 751 * 752 * In the case where it looks like (dev) is a SCSI disk, we allow the number of 753 * IDE disks to be specified in $num_ide_disks. There should be a Better Way. 754 */ 755int 756bd_getdev(struct i386_devdesc *dev) 757{ --- 75 unchanged lines hidden --- | 779 * Return a suitable dev_t value for (dev). 780 * 781 * In the case where it looks like (dev) is a SCSI disk, we allow the number of 782 * IDE disks to be specified in $num_ide_disks. There should be a Better Way. 783 */ 784int 785bd_getdev(struct i386_devdesc *dev) 786{ --- 75 unchanged lines hidden --- |