/* diskmodel (version 1.0) * Authors: John Bucy, Greg Ganger * Contributors: John Griffin, Jiri Schindler, Steve Schlosser * * Copyright (c) of Carnegie Mellon University, 2001-2008. * * This software is being provided by the copyright holders under the * following license. By obtaining, using and/or copying this * software, you agree that you have read, understood, and will comply * with the following terms and conditions: * * Permission to reproduce, use, and prepare derivative works of this * software is granted provided the copyright and "No Warranty" * statements are included with all reproductions and derivative works * and associated documentation. This software may also be * redistributed without charge provided that the copyright and "No * Warranty" statements are included in all redistributions. * * NO WARRANTY. THIS SOFTWARE IS FURNISHED ON AN "AS IS" BASIS. * CARNEGIE MELLON UNIVERSITY MAKES NO WARRANTIES OF ANY KIND, EITHER * EXPRESSED OR IMPLIED AS TO THE MATTER INCLUDING, BUT NOT LIMITED * TO: WARRANTY OF FITNESS FOR PURPOSE OR MERCHANTABILITY, EXCLUSIVITY * OF RESULTS OR RESULTS OBTAINED FROM USE OF THIS SOFTWARE. CARNEGIE * MELLON UNIVERSITY DOES NOT MAKE ANY WARRANTY OF ANY KIND WITH * RESPECT TO FREEDOM FROM PATENT, TRADEMARK, OR COPYRIGHT * INFRINGEMENT.  COPYRIGHT HOLDERS WILL BEAR NO LIABILITY FOR ANY USE * OF THIS SOFTWARE OR DOCUMENTATION.   */#include "dm.h"// cyl is 24 bits, head is 8, sect is 32// convert the internal format to a struct dm_pbnint dm_to_pbn(dm_pbn_t i, struct dm_pbn *result){  result->sector = 0xffffffff & i;  result->head = (i >> 32) & 0xff;  result->cyl = (i >> 40) & 0xffffff;  return 0;}// convert a struct dm_pbn to the internal format int dm_from_pbn(struct dm_pbn *p, dm_pbn_t *result){  *result = p->sector;  *result |= ((dm_pbn_t)(p->head & 0xff) << 32);  *result |= ((dm_pbn_t)(p->cyl & 0xffffff) << 40);  return 0;}