177 lines
4.7 KiB
C
177 lines
4.7 KiB
C
/* $NetBSD: kvm_sun3x.c,v 1.12 2011/09/14 12:37:55 christos Exp $ */
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/*-
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* Copyright (c) 1997 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Gordon W. Ross.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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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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__RCSID("$NetBSD: kvm_sun3x.c,v 1.12 2011/09/14 12:37:55 christos Exp $");
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#endif
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#endif /* LIBC_SCCS and not lint */
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/*
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* Sun3x 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/param.h>
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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 <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_sun3x_initvtop(kvm_t *);
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void _kvm_sun3x_freevtop(kvm_t *);
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int _kvm_sun3x_kvatop (kvm_t *, vaddr_t, paddr_t *);
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off_t _kvm_sun3x_pa2off (kvm_t *, paddr_t);
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struct kvm_ops _kvm_ops_sun3x = {
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_kvm_sun3x_initvtop,
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_kvm_sun3x_freevtop,
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_kvm_sun3x_kvatop,
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_kvm_sun3x_pa2off };
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#define _kvm_kvas_size(h) \
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(-((h)->kernbase))
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#define _kvm_nkptes(h, v) \
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(_kvm_kvas_size((h)) >> (v)->pgshift)
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#define _kvm_pg_pa(pte, h) \
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((pte) & (h)->pg_frame)
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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. Nothing to do here.
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*/
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int
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_kvm_sun3x_initvtop(kvm_t *kd)
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{
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return 0;
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}
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void
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_kvm_sun3x_freevtop(kvm_t *kd)
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{
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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 crash dumps.
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*/
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int
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_kvm_sun3x_kvatop(kvm_t *kd, vaddr_t va, paddr_t *pap)
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{
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cpu_kcore_hdr_t *h = kd->cpu_data;
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struct sun3x_kcore_hdr *s = &h->un._sun3x;
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struct vmstate *v = kd->vmst;
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int idx, len, offset, pte;
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u_long pteva, 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(0);
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}
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if (va < h->kernbase) {
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_kvm_err(kd, 0, "not a kernel address");
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return(0);
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}
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/*
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* If this VA is in the contiguous range, short-cut.
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* Note that this ends our recursion when we call
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* kvm_read to access the kernel page table, which
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* is guaranteed to be in the contiguous range.
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*/
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if (va < s->contig_end) {
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len = s->contig_end - va;
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pa = va - h->kernbase;
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goto done;
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}
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/*
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* The KVA is beyond the contiguous range, so we must
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* read the PTE for this KVA from the page table.
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*/
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idx = ((va - h->kernbase) >> v->pgshift);
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pteva = s->kernCbase + (idx * 4);
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if (kvm_read(kd, pteva, &pte, 4) != 4) {
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_kvm_err(kd, 0, "can not read PTE!");
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return (0);
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}
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if ((pte & s->pg_valid) == 0) {
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_kvm_err(kd, 0, "page not valid (VA=0x%lx)", va);
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return (0);
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}
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offset = va & v->pgofset;
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len = (h->page_size - offset);
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pa = _kvm_pg_pa(pte, s) + offset;
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done:
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*pap = pa;
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return (len);
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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_sun3x_pa2off(kvm_t *kd, paddr_t 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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cpu_kcore_hdr_t *h = kd->cpu_data;
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struct sun3x_kcore_hdr *s = &h->un._sun3x;
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off = 0;
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for (rsp = s->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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