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/* $OpenBSD: kvm_sun3.c,v 1.3 1996/05/10 12:58:33 deraadt Exp $ */
/* $NetBSD: kvm_sun3.c,v 1.4 1996/05/05 04:32:18 gwr 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. 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.
*/
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
static char sccsid[] = "@(#)kvm_sparc.c 8.1 (Berkeley) 6/4/93";
#else
static char *rcsid = "$NetBSD: kvm_sun3.c,v 1.4 1996/05/05 04:32:18 gwr Exp $";
#endif
#endif /* LIBC_SCCS and not lint */
/*
* Sun3 machine dependent routines for kvm.
*/
#include <sys/param.h>
#include <sys/user.h>
#include <sys/proc.h>
#include <sys/stat.h>
#include <sys/core.h>
#include <sys/exec_aout.h>
#include <sys/kcore.h>
#include <unistd.h>
#include <limits.h>
#include <nlist.h>
#include <kvm.h>
#include <db.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <machine/kcore.h>
#include <machine/pte.h>
#include "kvm_private.h"
#define NKSEG (NSEGMAP/8) /* kernel segmap entries */
struct vmstate {
/* Page Map Entry Group (PMEG) */
int pmeg[NKSEG][NPAGSEG];
};
/*
* Prepare for translation of kernel virtual addresses into offsets
* into crash dump files. We use the MMU specific goop written at the
* beginning of a crash dump by dumpsys()
* Note: sun3 MMU specific!
*/
int
_kvm_initvtop(kd)
kvm_t *kd;
{
register char *p;
p = kd->cpu_data;
p += (NBPG - sizeof(kcore_seg_t));
kd->vmst = (struct vmstate *)p;
return (0);
}
void
_kvm_freevtop(kd)
kvm_t *kd;
{
/* This was set by pointer arithmetic, not allocation. */
kd->vmst = (void*)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(kd, va, pap)
kvm_t *kd;
u_long va;
u_long *pap;
{
register cpu_kcore_hdr_t *ckh;
u_int segnum, sme, ptenum;
int pte, offset;
u_long pa;
if (ISALIVE(kd)) {
_kvm_err(kd, 0, "vatop called in live kernel!");
return((off_t)0);
}
ckh = kd->cpu_data;
if (va < KERNBASE) {
_kvm_err(kd, 0, "not a kernel address");
return((off_t)0);
}
/*
* Get the segmap entry (sme) from the kernel segmap.
* Note: only have segmap entries from KERNBASE to end.
*/
segnum = VA_SEGNUM(va - KERNBASE);
ptenum = VA_PTE_NUM(va);
offset = va & PGOFSET;
/* The segmap entry selects a PMEG. */
sme = ckh->ksegmap[segnum];
pte = kd->vmst->pmeg[sme][ptenum];
if ((pte & PG_VALID) == 0) {
_kvm_err(kd, 0, "page not valid (VA=0x%x)", va);
return (0);
}
pa = PG_PA(pte) + offset;
*pap = pa;
return (NBPG - offset);
}
/*
* Translate a physical address to a file-offset in the crash-dump.
*/
off_t
_kvm_pa2off(kd, pa)
kvm_t *kd;
u_long pa;
{
return(kd->dump_off + pa);
}
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