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/* $NetBSD: kvm_sun2.c,v 1.6 2011/09/14 12:37:55 christos 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.
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
static char sccsid[] = "@(#)kvm_sparc.c 8.1 (Berkeley) 6/4/93";
#else
__RCSID("$NetBSD: kvm_sun2.c,v 1.6 2011/09/14 12:37:55 christos Exp $");
#endif
#endif /* LIBC_SCCS and not lint */
/*
* Sun2 machine dependent routines for kvm.
*
* Note: This file has to build on ALL m68000 machines,
* so do NOT include any <machine / *.h> files here.
*/
#include <sys/param.h>
#include <sys/types.h>
#include <sys/kcore.h>
#include <unistd.h>
#include <limits.h>
#include <nlist.h>
#include <kvm.h>
#include <db.h>
#include <m68k/kcore.h>
#include "kvm_private.h"
#include "kvm_m68k.h"
int _kvm_sun2_initvtop(kvm_t *);
void _kvm_sun2_freevtop(kvm_t *);
int _kvm_sun2_kvatop (kvm_t *, vaddr_t, paddr_t *);
off_t _kvm_sun2_pa2off (kvm_t *, paddr_t);
struct kvm_ops _kvm_ops_sun2 = {
_kvm_sun2_initvtop,
_kvm_sun2_freevtop,
_kvm_sun2_kvatop,
_kvm_sun2_pa2off };
#define _kvm_pg_pa(v, s, pte) \
(((pte) & (s)->pg_frame) << (v)->pgshift)
#define _kvm_va_segnum(s, x) \
((u_int)(x) >> (s)->segshift)
#define _kvm_pte_num_mask(v) \
(0xf << (v)->pgshift)
#define _kvm_va_pte_num(v, va) \
(((va) & _kvm_pte_num_mask((v))) >> (v)->pgshift)
/*
* XXX Re-define these here, no other place for them.
*/
#define NKSEG 512 /* kernel segmap entries */
#define NPAGSEG 16 /* pages per segment */
/* Finally, our local stuff... */
struct private_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: sun2 MMU specific!
*/
int
_kvm_sun2_initvtop(kvm_t *kd)
{
cpu_kcore_hdr_t *h = kd->cpu_data;
char *p;
p = kd->cpu_data;
p += (h->page_size - sizeof(kcore_seg_t));
kd->vmst->private = p;
return (0);
}
void
_kvm_sun2_freevtop(kvm_t *kd)
{
/* This was set by pointer arithmetic, not allocation. */
kd->vmst->private = (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 crash dumps.
*/
int
_kvm_sun2_kvatop(kvm_t *kd, vaddr_t va, paddr_t *pap)
{
cpu_kcore_hdr_t *h = kd->cpu_data;
struct sun2_kcore_hdr *s = &h->un._sun2;
struct vmstate *v = kd->vmst;
struct private_vmstate *pv = v->private;
int pte, offset;
u_int segnum, sme, ptenum;
paddr_t pa;
if (ISALIVE(kd)) {
_kvm_err(kd, 0, "vatop called in live kernel!");
return(0);
}
if (va < h->kernbase) {
_kvm_err(kd, 0, "not a kernel address");
return(0);
}
/*
* Get the segmap entry (sme) from the kernel segmap.
* Note: only have segmap entries from KERNBASE to end.
*/
segnum = _kvm_va_segnum(s, va - h->kernbase);
ptenum = _kvm_va_pte_num(v, va);
offset = va & v->pgofset;
/* The segmap entry selects a PMEG. */
sme = s->ksegmap[segnum];
pte = pv->pmeg[sme][ptenum];
if ((pte & (s)->pg_valid) == 0) {
_kvm_err(kd, 0, "page not valid (VA=0x%lx)", va);
return (0);
}
pa = _kvm_pg_pa(v, s, pte) + offset;
*pap = pa;
return (h->page_size - offset);
}
/*
* Translate a physical address to a file-offset in the crash dump.
*/
off_t
_kvm_sun2_pa2off(kvm_t *kd, paddr_t pa)
{
return(kd->dump_off + pa);
}
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