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Annotation of sys/arch/hp300/hp300/kgdb_machdep.c, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: kgdb_machdep.c,v 1.4 2005/11/13 17:50:44 fgsch Exp $  */
                      2: /*     $NetBSD: kgdb_machdep.c,v 1.1 1997/05/05 20:51:05 thorpej Exp $ */
                      3:
                      4: /*
                      5:  * Copyright (c) 1990, 1993
                      6:  *     The Regents of the University of California.  All rights reserved.
                      7:  *
                      8:  * This software was developed by the Computer Systems Engineering group
                      9:  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
                     10:  * contributed to Berkeley.
                     11:  *
                     12:  * All advertising materials mentioning features or use of this software
                     13:  * must display the following acknowledgement:
                     14:  *     This product includes software developed by the University of
                     15:  *     California, Lawrence Berkeley Laboratories.
                     16:  *
                     17:  * Redistribution and use in source and binary forms, with or without
                     18:  * modification, are permitted provided that the following conditions
                     19:  * are met:
                     20:  * 1. Redistributions of source code must retain the above copyright
                     21:  *    notice, this list of conditions and the following disclaimer.
                     22:  * 2. Redistributions in binary form must reproduce the above copyright
                     23:  *    notice, this list of conditions and the following disclaimer in the
                     24:  *    documentation and/or other materials provided with the distribution.
                     25:  * 3. Neither the name of the University nor the names of its contributors
                     26:  *    may be used to endorse or promote products derived from this software
                     27:  *    without specific prior written permission.
                     28:  *
                     29:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     30:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     31:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     32:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     33:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     34:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     35:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     36:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     37:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     38:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     39:  * SUCH DAMAGE.
                     40:  *
                     41:  *     @(#)kgdb_stub.c 8.4 (Berkeley) 1/12/94
                     42:  */
                     43:
                     44: /*
                     45:  * Machine-dependent part of the KGDB remote "stub"
                     46:  */
                     47:
                     48: #include <sys/param.h>
                     49: #include <sys/systm.h>
                     50: #include <sys/kgdb.h>
                     51:
                     52: #include <machine/db_machdep.h>
                     53: #include <machine/pte.h>
                     54:
                     55: /*
                     56:  * Determine if the memory at va..(va+len) is valid.
                     57:  */
                     58: int
                     59: kgdb_acc(va, ulen)
                     60:        vaddr_t va;
                     61:        size_t ulen;
                     62: {
                     63:        int len, pgoff;
                     64:        pt_entry_t *pte;
                     65:
                     66:        len = (int)ulen;
                     67:        pgoff = va & PGOFSET;
                     68:        va  -= pgoff;
                     69:        len += pgoff;
                     70:
                     71:        while (len > 0) {
                     72:                pte = kvtopte(va);
                     73:                if ((*pte & PG_V) == 0)
                     74:                        return (0);
                     75:                va  += NBPG;
                     76:                len -= NBPG;
                     77:        }
                     78:
                     79:        return (1);
                     80: }