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/* $OpenBSD: kvm_ns32k.c,v 1.1 1996/03/19 23:15:38 niklas Exp $ */
/* $NetBSD: kvm_ns32k.c,v 1.1.1.1 1996/03/16 10:05:24 leo Exp $ */
/*-
* Copyright (c) 1989, 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*/
/* from: "@(#)kvm_hp300.c 8.1 (Berkeley) 6/4/93"; */
/*
* ns32k 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 <stdlib.h>
#include <unistd.h>
#include <nlist.h>
#include <kvm.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <limits.h>
#include <db.h>
#include "kvm_private.h"
#include <machine/pte.h>
#ifndef btop
#define btop(x) (((unsigned)(x)) >> PGSHIFT) /* XXX */
#define ptob(x) ((caddr_t)((x) << PGSHIFT)) /* XXX */
#endif
struct vmstate {
pd_entry_t **PTDpaddr;
pd_entry_t *PTD;
};
#define KREAD(kd, addr, p)\
(kvm_read(kd, addr, (char *)(p), sizeof(*(p))) != sizeof(*(p)))
void
_kvm_freevtop(kd)
kvm_t *kd;
{
if (kd->vmst != 0) {
if (kd->vmst->PTD != 0)
free(kd->vmst->PTD);
free(kd->vmst);
}
}
int
_kvm_initvtop(kd)
kvm_t *kd;
{
struct vmstate *vm;
struct nlist nlist[2];
pt_entry_t *tmpPTD;
vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm));
if (vm == 0)
return (-1);
kd->vmst = vm;
nlist[0].n_name = "_PTDpaddr";
nlist[1].n_name = 0;
if (kvm_nlist(kd, nlist) != 0) {
_kvm_err(kd, kd->program, "bad namelist");
return (-1);
}
vm->PTDpaddr = 0;
vm->PTD = 0;
if (KREAD(kd, (u_long)nlist[0].n_value - KERNBASE, &vm->PTDpaddr)) {
_kvm_err(kd, kd->program, "cannot read PTDpaddr");
return (-1);
}
tmpPTD = (pd_entry_t *)_kvm_malloc(kd, NBPG);
if ((kvm_read(kd, (u_long)vm->PTDpaddr, tmpPTD, NBPG)) != NBPG) {
free(tmpPTD);
_kvm_err(kd, kd->program, "cannot read PTD");
return (-1);
}
vm->PTD = tmpPTD;
return (0);
}
/*
* Translate a kernel virtual address to a physical address.
*/
int
_kvm_kvatop(kd, va, pa)
kvm_t *kd;
u_long va;
u_long *pa;
{
struct vmstate *vm;
u_long offset;
u_long pte_pa;
pt_entry_t pte;
if (ISALIVE(kd)) {
_kvm_err(kd, 0, "vatop called in live kernel!");
return(0);
}
vm = kd->vmst;
offset = va & PGOFSET;
/*
* If we are initializing (kernel page table descriptor pointer
* not yet set) * then return pa == va to avoid infinite recursion.
*/
if (vm->PTD == 0) {
*pa = va;
return (NBPG - offset);
}
if ((vm->PTD[pdei(va)] & PG_V) == 0)
goto invalid;
pte_pa = (vm->PTD[pdei(va)] & PG_FRAME) +
(ptei(va) * sizeof(pt_entry_t));
/* XXX READ PHYSICAL XXX */
{
if (lseek(kd->pmfd, (off_t)pte_pa, 0) == -1 && errno != 0) {
_kvm_syserr(kd, 0, "kvm_lseek");
goto invalid;
}
if (read(kd->pmfd, &pte, sizeof pte) != sizeof pte) {
_kvm_syserr(kd, kd->program, "kvm_read");
goto invalid;
}
}
*pa = (pte & PG_FRAME) + offset;
return (NBPG - offset);
invalid:
_kvm_err(kd, 0, "invalid address (%x)", va);
return (0);
}
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