File: [local] / sys / ufs / ext2fs / ext2fs_subr.c (download)
Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:16:16 2008 UTC (16 years, 4 months ago) by nbrk
Branch: OPENBSD_4_2_BASE, MAIN
CVS Tags: jornada-partial-support-wip, HEAD Changes since 1.1: +0 -0 lines
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)
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/* $OpenBSD: ext2fs_subr.c,v 1.17 2007/06/17 20:15:25 jasper Exp $ */
/* $NetBSD: ext2fs_subr.c,v 1.1 1997/06/11 09:34:03 bouyer Exp $ */
/*
* Copyright (c) 1997 Manuel Bouyer.
* Copyright (c) 1982, 1986, 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* 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.
*
* @(#)ffs_subr.c 8.2 (Berkeley) 9/21/93
* Modified for ext2fs by Manuel Bouyer.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/buf.h>
#include <ufs/ufs/quota.h>
#include <ufs/ufs/inode.h>
#include <ufs/ufs/ufsmount.h>
#include <ufs/ext2fs/ext2fs.h>
#include <ufs/ext2fs/ext2fs_extern.h>
#include <miscfs/specfs/specdev.h>
#include <miscfs/fifofs/fifo.h>
union _qcvt {
int64_t qcvt;
int32_t val[2];
};
#define SETHIGH(q, h) { \
union _qcvt tmp; \
tmp.qcvt = (q); \
tmp.val[_QUAD_HIGHWORD] = (h); \
(q) = tmp.qcvt; \
}
#define SETLOW(q, l) { \
union _qcvt tmp; \
tmp.qcvt = (q); \
tmp.val[_QUAD_LOWWORD] = (l); \
(q) = tmp.qcvt; \
}
#ifdef _KERNEL
/*
* Return buffer with the contents of block "offset" from the beginning of
* directory "ip". If "res" is non-zero, fill it in with a pointer to the
* remaining space in the directory.
*/
int
ext2fs_bufatoff(struct inode *ip, off_t offset, char **res, struct buf **bpp)
{
struct vnode *vp;
struct m_ext2fs *fs;
struct buf *bp;
int32_t lbn;
int error;
vp = ITOV(ip);
fs = ip->i_e2fs;
lbn = lblkno(fs, offset);
*bpp = NULL;
if ((error = bread(vp, lbn, fs->e2fs_bsize, NOCRED, &bp)) != 0) {
brelse(bp);
return (error);
}
if (res)
*res = (char *)bp->b_data + blkoff(fs, offset);
*bpp = bp;
return (0);
}
#endif
#if defined(_KERNEL) && defined(DIAGNOSTIC)
void
ext2fs_checkoverlap(struct buf *bp, struct inode *ip)
{
struct buf *ep;
int32_t start, last;
struct vnode *vp;
start = bp->b_blkno;
last = start + btodb(bp->b_bcount) - 1;
LIST_FOREACH(ep, &bufhead, b_list) {
if (ep == bp || (ep->b_flags & B_INVAL) ||
ep->b_vp == NULLVP)
continue;
if (VOP_BMAP(ep->b_vp, (daddr_t)0, &vp, (daddr_t)0, NULL))
continue;
if (vp != ip->i_devvp)
continue;
/* look for overlap */
if (ep->b_bcount == 0 || ep->b_blkno > last ||
ep->b_blkno + btodb(ep->b_bcount) <= start)
continue;
vprint("Disk overlap", vp);
printf("\tstart %d, end %d overlap start %d, end %ld\n",
start, last, ep->b_blkno,
ep->b_blkno + btodb(ep->b_bcount) - 1);
panic("Disk buffer overlap");
}
}
#endif /* DIAGNOSTIC */
/*
* Initialize the vnode associated with a new inode, handle aliased vnodes.
*/
int
ext2fs_vinit(struct mount *mp, int (**specops)(void *),
int (**fifoops)(void *), struct vnode **vpp)
{
struct inode *ip;
struct vnode *vp, *nvp;
struct timeval tv;
vp = *vpp;
ip = VTOI(vp);
vp->v_type = IFTOVT(ip->i_e2fs_mode);
switch(vp->v_type) {
case VCHR:
case VBLK:
vp->v_op = specops;
nvp = checkalias(vp, fs2h32(ip->i_e2din->e2di_rdev), mp);
if (nvp != NULL) {
/*
* Discard unneeded vnode, but save its inode. Note
* that the lock is carried over in the inode to the
* replacement vnode.
*/
nvp->v_data = vp->v_data;
vp->v_data = NULL;
vp->v_op = spec_vnodeop_p;
#ifdef VFSDEBUG
vp->v_flag &= ~VLOCKSWORK;
#endif
vrele(vp);
vgone(vp);
/* Reinitialize aliased vnode. */
vp = nvp;
ip->i_vnode = vp;
}
break;
case VFIFO:
#ifdef FIFO
vp->v_op = fifoops;
break;
#else
return (EOPNOTSUPP);
#endif /* FIFO */
default:
break;
}
if (ip->i_number == EXT2_ROOTINO)
vp->v_flag |= VROOT;
/* Initialize modrev times */
getmicrouptime(&tv);
SETHIGH(ip->i_modrev, tv.tv_sec);
SETLOW(ip->i_modrev, tv.tv_usec * 4294);
*vpp = vp;
return (0);
}