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File: [local] / sys / isofs / cd9660 / cd9660_bmap.c (download)
Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:14:50 2008 UTC (16 years, 6 months ago) by nbrk
Import of OpenBSD 4.2 release kernel tree with initial code to support Jornada 720/728, StrongARM 1110-based handheld PC. At this point kernel roots on NFS and boots into vfs_mountroot() and traps. What is supported: - glass console, Jornada framebuffer (jfb) works in 16bpp direct color mode (needs some palette tweaks for non black/white/blue colors, i think) - saic, SA11x0 interrupt controller (needs cleanup) - sacom, SA11x0 UART (supported only as boot console for now) - SA11x0 GPIO controller fully supported (but can't handle multiple interrupt handlers on one gpio pin) - sassp, SSP port on SA11x0 that attaches spibus - Jornada microcontroller (jmcu) to control kbd, battery, etc throught the SPI bus (wskbd attaches on jmcu, but not tested) - tod functions seem work - initial code for SA-1111 (chip companion) : this is TODO Next important steps, i think: - gpio and intc on sa1111 - pcmcia support for sa11x0 (and sa1111 help logic) - REAL root on nfs when we have PCMCIA support (we may use any of supported pccard NICs) - root on wd0! (using already supported PCMCIA-ATA) |
/* $OpenBSD: cd9660_bmap.c,v 1.6 2007/06/06 17:15:13 deraadt Exp $ */ /* $NetBSD: cd9660_bmap.c,v 1.7 1997/01/24 00:27:29 cgd Exp $ */ /*- * Copyright (c) 1994 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension * Support code is derived from software contributed to Berkeley * by Atsushi Murai (amurai@spec.co.jp). * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)cd9660_bmap.c 8.4 (Berkeley) 12/5/94 */ #include <sys/param.h> #include <sys/namei.h> #include <sys/buf.h> #include <sys/file.h> #include <sys/vnode.h> #include <sys/mount.h> #include <isofs/cd9660/iso.h> #include <isofs/cd9660/cd9660_extern.h> #include <isofs/cd9660/cd9660_node.h> /* * Bmap converts a the logical block number of a file to its physical block * number on the disk. The conversion is done by using the logical block * number to index into the data block (extent) for the file. */ int cd9660_bmap(v) void *v; { struct vop_bmap_args *ap = v; struct iso_node *ip = VTOI(ap->a_vp); daddr64_t lblkno = ap->a_bn; int bshift; /* * Check for underlying vnode requests and ensure that logical * to physical mapping is requested. */ if (ap->a_vpp != NULL) *ap->a_vpp = ip->i_devvp; if (ap->a_bnp == NULL) return (0); /* * Compute the requested block number */ bshift = ip->i_mnt->im_bshift; *ap->a_bnp = (ip->iso_start + lblkno) << (bshift - DEV_BSHIFT); /* * Determine maximum number of readahead blocks following the * requested block. */ if (ap->a_runp) { int nblk; nblk = (ip->i_size >> bshift) - (lblkno + 1); if (nblk <= 0) *ap->a_runp = 0; else if (nblk >= (MAXBSIZE >> bshift)) *ap->a_runp = (MAXBSIZE >> bshift) - 1; else *ap->a_runp = nblk; } return (0); }