NetBSD/lib/libkvm/kvm_sparc.c

281 lines
6.8 KiB
C
Raw Normal View History

1997-04-03 01:07:03 +04:00
/* $NetBSD: kvm_sparc.c,v 1.11 1997/04/02 21:07:03 pk Exp $ */
1996-03-19 01:33:07 +03:00
1994-05-09 07:15:36 +04:00
/*-
* 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)
1996-03-19 01:33:07 +03:00
#if 0
1994-05-09 07:15:36 +04:00
static char sccsid[] = "@(#)kvm_sparc.c 8.1 (Berkeley) 6/4/93";
1996-03-19 01:33:07 +03:00
#else
1997-04-03 01:07:03 +04:00
static char *rcsid = "$NetBSD: kvm_sparc.c,v 1.11 1997/04/02 21:07:03 pk Exp $";
1996-03-19 01:33:07 +03:00
#endif
1994-05-09 07:15:36 +04:00
#endif /* LIBC_SCCS and not lint */
/*
* Sparc 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>
1996-11-10 02:47:34 +03:00
#include <sys/core.h>
#include <sys/kcore.h>
1994-05-09 07:15:36 +04:00
#include <unistd.h>
#include <nlist.h>
#include <kvm.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
1995-07-05 22:41:25 +04:00
#include <machine/autoconf.h>
1996-11-10 02:47:34 +03:00
#include <machine/kcore.h>
1994-05-09 07:15:36 +04:00
#include <limits.h>
#include <db.h>
#include "kvm_private.h"
static int cputyp = -1;
1996-11-10 02:47:34 +03:00
static int pgshift;
static int nptesg; /* [sun4/sun4c] only */
1994-09-18 06:32:50 +04:00
#define VA_VPG(va) ((cputyp == CPU_SUN4C || cputyp == CPU_SUN4M) \
? VA_SUN4C_VPG(va) \
: VA_SUN4_VPG(va))
1996-11-10 02:47:34 +03:00
#define VA_OFF(va) (va & (kd->nbpg - 1))
1996-11-10 02:47:34 +03:00
void
_kvm_freevtop(kd)
1994-09-18 06:32:50 +04:00
kvm_t *kd;
{
1996-11-10 02:47:34 +03:00
if (kd->vmst != 0) {
_kvm_err(kd, kd->program, "_kvm_freevtop: internal error");
kd->vmst = 0;
}
1994-09-18 06:32:50 +04:00
}
1996-11-10 02:47:34 +03:00
/*
* Prepare for translation of kernel virtual addresses into offsets
* into crash dump files. We use the MMU specific goop written at the
* front of the crash dump by pmap_dumpmmu().
*/
int
_kvm_initvtop(kd)
1994-05-09 07:15:36 +04:00
kvm_t *kd;
{
1996-11-10 02:47:34 +03:00
cpu_kcore_hdr_t *cpup = kd->cpu_data;
switch (cputyp = cpup->cputype) {
case CPU_SUN4:
kd->nbpg = 8196;
pgshift = 13;
break;
case CPU_SUN4C:
case CPU_SUN4M:
kd->nbpg = 4096;
pgshift = 12;
break;
default:
_kvm_err(kd, kd->program, "Unsupported CPU type");
return (-1);
1994-09-18 06:32:50 +04:00
}
1996-11-10 02:47:34 +03:00
nptesg = NBPSG / kd->nbpg;
return (0);
1994-05-09 07:15:36 +04:00
}
/*
* 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, pa)
kvm_t *kd;
u_long va;
u_long *pa;
{
1996-11-10 02:47:34 +03:00
if (cputyp == -1)
if (_kvm_initvtop(kd) != 0)
return (-1);
return ((cputyp == CPU_SUN4M)
? _kvm_kvatop4m(kd, va, pa)
: _kvm_kvatop44c(kd, va, pa));
}
1995-07-05 22:41:25 +04:00
/*
* (note: sun4 3-level MMU not yet supported)
*/
1994-05-09 07:15:36 +04:00
int
_kvm_kvatop44c(kd, va, pa)
1994-05-09 07:15:36 +04:00
kvm_t *kd;
u_long va;
u_long *pa;
{
1996-11-10 02:47:34 +03:00
register int vr, vs, pte;
cpu_kcore_hdr_t *cpup = kd->cpu_data;
1995-07-05 22:41:25 +04:00
struct regmap *rp;
struct segmap *sp;
1996-11-10 02:47:34 +03:00
int *ptes;
1994-05-09 07:15:36 +04:00
1995-07-05 22:41:25 +04:00
if (va < KERNBASE)
goto err;
1996-11-10 02:47:34 +03:00
/*
* Layout of CPU segment:
* cpu_kcore_hdr_t;
* [alignment]
* phys_ram_seg_t[cpup->nmemseg];
* ptes[cpup->npmegs];
*/
ptes = (int *)((int)kd->cpu_data + cpup->pmegoffset);
1995-07-05 22:41:25 +04:00
vr = VA_VREG(va);
vs = VA_VSEG(va);
1996-11-10 02:47:34 +03:00
sp = &cpup->segmap_store[(vr-NUREG)*NSEGRG + vs];
1995-07-05 22:41:25 +04:00
if (sp->sg_npte == 0)
goto err;
1997-04-03 01:07:03 +04:00
if (sp->sg_pmeg == cpup->npmeg - 1) /* =seginval */
1995-07-05 22:41:25 +04:00
goto err;
1996-11-10 02:47:34 +03:00
pte = ptes[sp->sg_pmeg * nptesg + VA_VPG(va)];
1995-07-05 22:41:25 +04:00
if ((pte & PG_V) != 0) {
1996-11-10 02:47:34 +03:00
register long p, off = VA_OFF(va);
1995-07-05 22:41:25 +04:00
p = (pte & PG_PFNUM) << pgshift;
1996-11-10 02:47:34 +03:00
*pa = p + off;
1995-07-05 22:41:25 +04:00
return (kd->nbpg - off);
1994-05-09 07:15:36 +04:00
}
1995-07-05 22:41:25 +04:00
err:
1994-05-09 07:15:36 +04:00
_kvm_err(kd, 0, "invalid address (%x)", va);
return (0);
}
int
_kvm_kvatop4m(kd, va, pa)
kvm_t *kd;
u_long va;
u_long *pa;
{
1996-11-10 02:47:34 +03:00
cpu_kcore_hdr_t *cpup = kd->cpu_data;
register int vr, vs;
int pte;
off_t foff;
struct regmap *rp;
struct segmap *sp;
if (va < KERNBASE)
goto err;
1996-11-10 02:47:34 +03:00
/*
* Layout of CPU segment:
* cpu_kcore_hdr_t;
* [alignment]
* phys_ram_seg_t[cpup->nmemseg];
*/
vr = VA_VREG(va);
vs = VA_VSEG(va);
1996-11-10 02:47:34 +03:00
sp = &cpup->segmap_store[(vr-NUREG)*NSEGRG + vs];
if (sp->sg_npte == 0)
goto err;
1996-11-10 02:47:34 +03:00
/* XXX - assume page tables in initial kernel DATA or BSS. */
foff = _kvm_pa2off(kd, (u_long)&sp->sg_pte[VA_VPG(va)] - KERNBASE);
if (foff == (off_t)-1)
return (0);
if (lseek(kd->pmfd, foff, 0) == -1 ||
read(kd->pmfd, (void *)&pte, sizeof(pte)) < 0) {
1996-11-10 02:47:34 +03:00
_kvm_err(kd, kd->program, "cannot read pte for %x", va);
return (0);
}
if ((pte & SRMMU_TETYPE) == SRMMU_TEPTE) {
1996-11-10 02:47:34 +03:00
register long p, off = VA_OFF(va);
p = (pte & SRMMU_PPNMASK) << SRMMU_PPNPASHIFT;
1996-11-10 02:47:34 +03:00
*pa = p + off;
return (kd->nbpg - off);
}
err:
_kvm_err(kd, 0, "invalid address (%x)", va);
return (0);
}
1996-11-10 02:47:34 +03:00
/*
* Translate a physical address to a file-offset in the crash-dump.
*/
off_t
_kvm_pa2off(kd, pa)
kvm_t *kd;
u_long pa;
{
cpu_kcore_hdr_t *cpup = kd->cpu_data;
phys_ram_seg_t *mp;
off_t off;
int nmem;
/*
* Layout of CPU segment:
* cpu_kcore_hdr_t;
* [alignment]
* phys_ram_seg_t[cpup->nmemseg];
*/
mp = (phys_ram_seg_t *)((int)kd->cpu_data + cpup->memsegoffset);
off = 0;
/* Translate (sparse) pfnum to (packed) dump offset */
for (nmem = cpup->nmemseg; --nmem >= 0; mp++) {
if (mp->start <= pa && pa < mp->start + mp->size)
break;
off += mp->size;
}
if (nmem < 0) {
_kvm_err(kd, 0, "invalid address (%x)", pa);
return (-1);
}
return (kd->dump_off + off + pa - mp->start);
}