341 lines
8.6 KiB
C
341 lines
8.6 KiB
C
/* $NetBSD: kvm_m68k_cmn.c,v 1.1 1997/03/21 18:44:24 gwr Exp $ */
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/*-
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* Copyright (c) 1989, 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software developed by the Computer Systems
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* Engineering group at Lawrence Berkeley Laboratory under DARPA contract
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* BG 91-66 and contributed to Berkeley.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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static char sccsid[] = "@(#)kvm_hp300.c 8.1 (Berkeley) 6/4/93";
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#else
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static char *rcsid = "$NetBSD: kvm_m68k_cmn.c,v 1.1 1997/03/21 18:44:24 gwr Exp $";
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#endif
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#endif /* LIBC_SCCS and not lint */
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/*
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* Common m68k machine dependent routines for kvm.
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*
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* Note: This file has to build on ALL m68k machines,
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* so do NOT include any <machine/*.h> files here.
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*/
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#include <sys/types.h>
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#include <sys/kcore.h>
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#include <unistd.h>
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#include <limits.h>
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#include <nlist.h>
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#include <kvm.h>
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#include <db.h>
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/* XXX: Avoid <machine/pte.h> etc. (see below) */
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typedef u_int pt_entry_t; /* page table entry */
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typedef u_int st_entry_t; /* segment table entry */
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#include <m68k/cpu.h>
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#include <m68k/kcore.h>
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#include "kvm_private.h"
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#include "kvm_m68k.h"
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int _kvm_cmn_initvtop __P((kvm_t *));
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void _kvm_cmn_freevtop __P((kvm_t *));
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int _kvm_cmn_kvatop __P((kvm_t *, u_long, u_long *));
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off_t _kvm_cmn_pa2off __P((kvm_t *, u_long));
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struct kvm_ops _kvm_ops_cmn = {
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_kvm_cmn_initvtop,
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_kvm_cmn_freevtop,
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_kvm_cmn_kvatop,
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_kvm_cmn_pa2off };
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static int vatop_030 __P((kvm_t *, st_entry_t *, ulong, ulong *));
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static int vatop_040 __P((kvm_t *, st_entry_t *, ulong, ulong *));
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/*
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* XXX: I don't like this, but until all arch/.../include files
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* are exported into some user-accessable place, there is no
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* convenient alternative to copying these definitions here.
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*/
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/* Things from param.h */
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#define PGSHIFT 13
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#define NBPG (1<<13)
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#define PGOFSET (NBPG-1)
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#define btop(x) (((unsigned)(x)) >> PGSHIFT)
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/* Things from pte.h */
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/* All variants */
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#define SG_V 2
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#define PG_NV 0x00000000
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#define PG_FRAME 0xffffe000
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/* MC68030 with MMU TCR set for 8/11/13 (bits) */
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#define SG3_SHIFT 24 /* a.k.a SEGSHIFT */
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#define SG3_FRAME 0xffffe000
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#define SG3_PMASK 0x00ffe000
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/* MC68040 with MMU set for 8K page size. */
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#define SG4_MASK1 0xfe000000
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#define SG4_SHIFT1 25
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#define SG4_MASK2 0x01fc0000
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#define SG4_SHIFT2 18
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#define SG4_MASK3 0x0003e000
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#define SG4_SHIFT3 13
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#define SG4_ADDR1 0xfffffe00
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#define SG4_ADDR2 0xffffff80
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#define KREAD(kd, addr, p)\
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(kvm_read(kd, addr, (char *)(p), sizeof(*(p))) != sizeof(*(p)))
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void
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_kvm_cmn_freevtop(kd)
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kvm_t *kd;
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{
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if (kd->vmst != 0)
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free(kd->vmst);
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}
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int
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_kvm_cmn_initvtop(kd)
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kvm_t *kd;
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{
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return (0);
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}
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int
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_kvm_cmn_kvatop(kd, va, pa)
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kvm_t *kd;
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u_long va;
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u_long *pa;
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{
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register cpu_kcore_hdr_t *cpu_kh;
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int (*vtopf) __P((kvm_t *, st_entry_t *, ulong, ulong *));
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if (ISALIVE(kd)) {
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_kvm_err(kd, 0, "vatop called in live kernel!");
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return (0);
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}
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cpu_kh = kd->cpu_data;
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switch (cpu_kh->mmutype) {
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case MMU_68030:
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vtopf = vatop_030;
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break;
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case MMU_68040:
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vtopf = vatop_040;
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break;
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default:
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_kvm_err(kd, 0, "vatop unknown MMU type!");
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return (0);
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}
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return ((*vtopf)(kd, cpu_kh->sysseg_pa, va, pa));
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}
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/*
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* Translate a physical address to a file-offset in the crash-dump.
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*/
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off_t
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_kvm_cmn_pa2off(kd, pa)
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kvm_t *kd;
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u_long pa;
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{
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off_t off;
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phys_ram_seg_t *rsp;
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register cpu_kcore_hdr_t *cpu_kh;
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cpu_kh = kd->cpu_data;
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off = 0;
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for (rsp = cpu_kh->ram_segs; rsp->size; rsp++) {
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if (pa >= rsp->start && pa < rsp->start + rsp->size) {
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pa -= rsp->start;
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break;
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}
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off += rsp->size;
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}
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return(kd->dump_off + off + pa);
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}
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/*****************************************************************
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* Local stuff...
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*/
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static int
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vatop_030(kd, sta, va, pa)
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kvm_t *kd;
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st_entry_t *sta;
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u_long va;
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u_long *pa;
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{
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register cpu_kcore_hdr_t *cpu_kh;
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register u_long addr;
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int p, ste, pte;
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int offset;
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offset = va & PGOFSET;
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cpu_kh = kd->cpu_data;
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/*
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* If we are initializing (kernel segment table pointer not yet set)
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* then return pa == va to avoid infinite recursion.
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*/
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if (cpu_kh->sysseg_pa == 0) {
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*pa = va + cpu_kh->kernel_pa;
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return (NBPG - offset);
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}
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addr = (u_long)&sta[va >> SG3_SHIFT];
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/*
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* Can't use KREAD to read kernel segment table entries.
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* Fortunately it is 1-to-1 mapped so we don't have to.
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*/
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if (sta == cpu_kh->sysseg_pa) {
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if (lseek(kd->pmfd, _kvm_cmn_pa2off(kd, addr), 0) == -1 ||
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read(kd->pmfd, (char *)&ste, sizeof(ste)) < 0)
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goto invalid;
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} else if (KREAD(kd, addr, &ste))
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goto invalid;
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if ((ste & SG_V) == 0) {
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_kvm_err(kd, 0, "invalid segment (%x)", ste);
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return((off_t)0);
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}
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p = btop(va & SG3_PMASK);
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addr = (ste & SG3_FRAME) + (p * sizeof(pt_entry_t));
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/*
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* Address from STE is a physical address so don't use kvm_read.
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*/
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if (lseek(kd->pmfd, _kvm_cmn_pa2off(kd, addr), 0) == -1 ||
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read(kd->pmfd, (char *)&pte, sizeof(pte)) < 0)
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goto invalid;
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addr = pte & PG_FRAME;
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if (pte == PG_NV) {
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_kvm_err(kd, 0, "page not valid");
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return (0);
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}
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*pa = addr + offset;
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return (NBPG - offset);
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invalid:
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_kvm_err(kd, 0, "invalid address (%x)", va);
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return (0);
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}
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static int
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vatop_040(kd, sta, va, pa)
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kvm_t *kd;
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st_entry_t *sta;
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u_long va;
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u_long *pa;
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{
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register cpu_kcore_hdr_t *cpu_kh;
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register u_long addr;
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st_entry_t *sta2;
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int p, ste, pte;
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int offset;
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offset = va & PGOFSET;
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cpu_kh = kd->cpu_data;
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/*
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* If we are initializing (kernel segment table pointer not yet set)
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* then return pa == va to avoid infinite recursion.
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*/
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if (cpu_kh->sysseg_pa == 0) {
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*pa = va + cpu_kh->kernel_pa;
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return (NBPG - offset);
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}
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addr = (u_long)&sta[va >> SG4_SHIFT1];
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/*
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* Can't use KREAD to read kernel segment table entries.
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* Fortunately it is 1-to-1 mapped so we don't have to.
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*/
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if (sta == cpu_kh->sysseg_pa) {
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if (lseek(kd->pmfd, _kvm_cmn_pa2off(kd, addr), 0) == -1 ||
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read(kd->pmfd, (char *)&ste, sizeof(ste)) < 0)
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goto invalid;
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} else if (KREAD(kd, addr, &ste))
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goto invalid;
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if ((ste & SG_V) == 0) {
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_kvm_err(kd, 0, "invalid level 1 descriptor (%x)",
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ste);
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return((off_t)0);
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}
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sta2 = (st_entry_t *)(ste & SG4_ADDR1);
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addr = (u_long)&sta2[(va & SG4_MASK2) >> SG4_SHIFT2];
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/*
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* Address from level 1 STE is a physical address,
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* so don't use kvm_read.
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*/
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if (lseek(kd->pmfd, _kvm_cmn_pa2off(kd, addr), 0) == -1 ||
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read(kd->pmfd, (char *)&ste, sizeof(ste)) < 0)
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goto invalid;
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if ((ste & SG_V) == 0) {
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_kvm_err(kd, 0, "invalid level 2 descriptor (%x)",
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ste);
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return((off_t)0);
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}
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sta2 = (st_entry_t *)(ste & SG4_ADDR2);
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addr = (u_long)&sta2[(va & SG4_MASK3) >> SG4_SHIFT3];
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/*
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* Address from STE is a physical address so don't use kvm_read.
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*/
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if (lseek(kd->pmfd, _kvm_cmn_pa2off(kd, addr), 0) == -1 ||
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read(kd->pmfd, (char *)&pte, sizeof(pte)) < 0)
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goto invalid;
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addr = pte & PG_FRAME;
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if (pte == PG_NV) {
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_kvm_err(kd, 0, "page not valid");
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return (0);
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}
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*pa = addr + offset;
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return (NBPG - offset);
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invalid:
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_kvm_err(kd, 0, "invalid address (%x)", va);
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return (0);
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}
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