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/* $OpenBSD: kvm_vax.c,v 1.14 2013/03/28 16:27:31 deraadt Exp $ */
/* $NetBSD: kvm_vax.c,v 1.3 1996/03/18 22:34:06 thorpej Exp $ */
/*-
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software developed by the Computer Systems
* Engineering group at Lawrence Berkeley Laboratory under DARPA contract
* BG 91-66 and contributed to Berkeley.
*
* 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.
*/
/*
* VAX machine dependent routines for kvm. Hopefully, the forthcoming
* vm code will one day obsolete this module.
*/
#include <sys/param.h>
#include <sys/user.h>
#include <sys/proc.h>
#include <sys/stat.h>
#include <sys/kcore.h>
#include <unistd.h>
#include <stdlib.h>
#include <nlist.h>
#include <kvm.h>
#include <uvm/uvm_extern.h>
#include <machine/vmparam.h>
#include <machine/kcore.h>
#include <machine/pmap.h>
#include <machine/pte.h>
#include <limits.h>
#include <db.h>
#include "kvm_private.h"
void
_kvm_freevtop(kvm_t *kd)
{
}
int
_kvm_initvtop(kvm_t *kd)
{
return (0);
}
/*
* Translate a kernel virtual address to a physical address using the
* mapping information in kd->vm. Returns the result in pa, and returns
* the number of bytes that are contiguously available from this
* physical address. This routine is used only for crashdumps.
*/
int
_kvm_kvatop(kvm_t *kd, u_long va, paddr_t *pa)
{
paddr_t ofs;
u_long pteaddr;
pt_entry_t pte;
cpu_kcore_hdr_t *cpu_kh;
if (ISALIVE(kd)) {
_kvm_err(kd, 0, "vatop called in live kernel!");
return (0);
}
if (va < (u_long)KERNBASE) {
_kvm_err(kd, 0, "invalid address (%lx<%lx)", va, KERNBASE);
return (0);
}
/* read pte from Sysmap */
cpu_kh = kd->cpu_data;
pteaddr = (cpu_kh->sysmap - KERNBASE) +
PG_PFNUM(va) * sizeof(pt_entry_t);
if (_kvm_pread(kd, kd->pmfd, (char *)&pte, sizeof(pte),
(off_t)_kvm_pa2off(kd, pteaddr)) < 0) {
_kvm_err(kd, 0, "invalid address (%lx)", va);
return (0);
}
if ((pte & PG_V) == 0) {
_kvm_err(kd, 0, "invalid pte %lx (address %lx)", pte, va);
return (0);
}
ofs = va & (kd->nbpg - 1);
*pa = ((pte & PG_FRAME) << VAX_PGSHIFT) | ofs;
return (int)(kd->nbpg - ofs);
}
/*
* Translate a physical address to an offset in the crash dump.
*/
off_t
_kvm_pa2off(kvm_t *kd, paddr_t pa)
{
return (kd->dump_off + pa);
}
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