202 lines
5.6 KiB
C
202 lines
5.6 KiB
C
/* $NetBSD: kvm_sun3.c,v 1.5 1997/03/21 18:44:25 gwr Exp $ */
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/*-
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* Copyright (c) 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_sparc.c 8.1 (Berkeley) 6/4/93";
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#else
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static char *rcsid = "$NetBSD: kvm_sun3.c,v 1.5 1997/03/21 18:44:25 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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* Sun3 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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#include "kvm_private.h"
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#include "kvm_m68k.h"
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int _kvm_sun3_initvtop __P((kvm_t *));
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void _kvm_sun3_freevtop __P((kvm_t *));
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int _kvm_sun3_kvatop __P((kvm_t *, u_long, u_long *));
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off_t _kvm_sun3_pa2off __P((kvm_t *, u_long));
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struct kvm_ops _kvm_ops_sun3 = {
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_kvm_sun3_initvtop,
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_kvm_sun3_freevtop,
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_kvm_sun3_kvatop,
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_kvm_sun3_pa2off };
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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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/* sun3/include/param.h */
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#define PGSHIFT 13
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#define NBPG 8192
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#define PGOFSET (NBPG-1)
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#define SEGSHIFT 17
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#define KERNBASE 0x0E000000
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/* sun3/include/pte.h */
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#define NKSEG 256 /* kernel segmap entries */
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#define NPAGSEG 16 /* pages per segment */
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#define PG_VALID 0x80000000
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#define PG_FRAME 0x0007FFFF
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#define PG_PA(pte) ((pte & PG_FRAME) <<PGSHIFT)
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#define VA_SEGNUM(x) ((u_int)(x) >> SEGSHIFT)
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#define VA_PTE_NUM_MASK (0xF << PGSHIFT)
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#define VA_PTE_NUM(va) ((va & VA_PTE_NUM_MASK) >> PGSHIFT)
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/* sun3/include/kcore.h */
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typedef struct cpu_kcore_hdr {
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phys_ram_seg_t ram_segs[4];
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u_char ksegmap[NKSEG];
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} cpu_kcore_hdr_t;
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/* Finally, our local stuff... */
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struct vmstate {
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/* Page Map Entry Group (PMEG) */
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int pmeg[NKSEG][NPAGSEG];
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};
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/*
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* Prepare for translation of kernel virtual addresses into offsets
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* into crash dump files. We use the MMU specific goop written at the
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* beginning of a crash dump by dumpsys()
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* Note: sun3 MMU specific!
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*/
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int
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_kvm_sun3_initvtop(kd)
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kvm_t *kd;
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{
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register char *p;
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p = kd->cpu_data;
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p += (NBPG - sizeof(kcore_seg_t));
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kd->vmst = (struct vmstate *)p;
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return (0);
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}
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void
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_kvm_sun3_freevtop(kd)
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kvm_t *kd;
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{
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/* This was set by pointer arithmetic, not allocation. */
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kd->vmst = (void*)0;
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}
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/*
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* Translate a kernel virtual address to a physical address using the
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* mapping information in kd->vm. Returns the result in pa, and returns
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* the number of bytes that are contiguously available from this
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* physical address. This routine is used only for crashdumps.
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*/
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int
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_kvm_sun3_kvatop(kd, va, pap)
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kvm_t *kd;
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u_long va;
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u_long *pap;
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{
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register cpu_kcore_hdr_t *ckh;
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u_int segnum, sme, ptenum;
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int pte, offset;
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u_long pa;
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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((off_t)0);
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}
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ckh = kd->cpu_data;
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if (va < KERNBASE) {
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_kvm_err(kd, 0, "not a kernel address");
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return((off_t)0);
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}
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/*
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* Get the segmap entry (sme) from the kernel segmap.
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* Note: only have segmap entries from KERNBASE to end.
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*/
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segnum = VA_SEGNUM(va - KERNBASE);
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ptenum = VA_PTE_NUM(va);
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offset = va & PGOFSET;
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/* The segmap entry selects a PMEG. */
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sme = ckh->ksegmap[segnum];
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pte = kd->vmst->pmeg[sme][ptenum];
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if ((pte & PG_VALID) == 0) {
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_kvm_err(kd, 0, "page not valid (VA=0x%x)", va);
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return (0);
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}
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pa = PG_PA(pte) + offset;
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*pap = pa;
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return (NBPG - offset);
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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_sun3_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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return(kd->dump_off + pa);
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}
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