281 lines
7.2 KiB
C
281 lines
7.2 KiB
C
/* $NetBSD: kvm_sparc64.c,v 1.19 2023/08/23 14:00:11 rin 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. 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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#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_sparc64.c,v 1.19 2023/08/23 14:00:11 rin Exp $");
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#endif
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#endif /* LIBC_SCCS and not lint */
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/*
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* Sparc machine dependent routines for kvm. Hopefully, the forthcoming
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* vm code will one day obsolete this module.
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*/
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#include <sys/param.h>
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#include <sys/exec.h>
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#include <sys/proc.h>
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#include <sys/stat.h>
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#include <sys/core.h>
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#include <sys/kcore.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <nlist.h>
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#include <kvm.h>
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#include <uvm/uvm_extern.h>
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#include <machine/pmap.h>
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#include <machine/kcore.h>
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#include <machine/vmparam.h>
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#include <machine/param.h>
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#include <limits.h>
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#include <db.h>
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#include "kvm_private.h"
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void
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_kvm_freevtop(kvm_t *kd)
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{
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if (kd->vmst != 0) {
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_kvm_err(kd, kd->program, "_kvm_freevtop: internal error");
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kd->vmst = 0;
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}
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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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* front of the crash dump by pmap_dumpmmu().
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*
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* We should read in and cache the ksegs here to speed up operations...
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*/
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int
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_kvm_initvtop(kvm_t *kd)
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{
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kd->nbpg = 0x2000;
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return (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 crash dumps.
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*/
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int
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_kvm_kvatop(kvm_t *kd, vaddr_t va, paddr_t *pa)
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{
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cpu_kcore_hdr_t *cpup = kd->cpu_data;
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u_long kernbase = cpup->kernbase;
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uint64_t *pseg, *pdir, *ptbl;
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struct cpu_kcore_4mbseg *ktlb;
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int64_t data;
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int i;
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if (va < kernbase)
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goto lose;
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/* Handle the wired 4MB TTEs and per-CPU mappings */
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if (cpup->memsegoffset > sizeof(cpu_kcore_hdr_t) &&
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cpup->newmagic == SPARC64_KCORE_NEWMAGIC) {
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/*
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* new format: we have a list of 4 MB mappings
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*/
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ktlb = (struct cpu_kcore_4mbseg *)
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((uintptr_t)kd->cpu_data + cpup->off4mbsegs);
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for (i = 0; i < cpup->num4mbsegs; i++) {
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uint64_t start = ktlb[i].va;
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if (va < start || va >= start+PAGE_SIZE_4M)
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continue;
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*pa = ktlb[i].pa + va - start;
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return (int)(start+PAGE_SIZE_4M - va);
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}
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if (cpup->numcpuinfos > 0) {
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/* we have per-CPU mapping info */
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uint64_t start, base;
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base = cpup->cpubase - 32*1024;
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if (va >= base && va < (base + cpup->percpusz)) {
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start = va - base;
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*pa = cpup->cpusp
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+ cpup->thiscpu*cpup->percpusz
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+ start;
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return cpup->percpusz - start;
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}
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}
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} else {
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/*
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* old format: just a textbase/size and database/size
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*/
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if (va > cpup->ktextbase && va <
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(cpup->ktextbase + cpup->ktextsz)) {
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u_long vaddr;
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vaddr = va - cpup->ktextbase;
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*pa = cpup->ktextp + vaddr;
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return (int)(cpup->ktextsz - vaddr);
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}
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if (va > cpup->kdatabase && va <
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(cpup->kdatabase + cpup->kdatasz)) {
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u_long vaddr;
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vaddr = va - cpup->kdatabase;
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*pa = cpup->kdatap + vaddr;
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return (int)(cpup->kdatasz - vaddr);
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}
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}
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/*
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* Parse kernel page table.
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*/
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pseg = (uint64_t *)(u_long)cpup->segmapoffset;
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if (_kvm_pread(kd, kd->pmfd, &pdir, sizeof(pdir),
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_kvm_pa2off(kd, (paddr_t)&pseg[va_to_seg(va)]))
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!= sizeof(pdir)) {
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_kvm_syserr(kd, 0, "could not read L1 PTE");
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goto lose;
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}
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if (!pdir) {
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_kvm_err(kd, 0, "invalid L1 PTE");
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goto lose;
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}
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if (_kvm_pread(kd, kd->pmfd, &ptbl, sizeof(ptbl),
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_kvm_pa2off(kd, (paddr_t)&pdir[va_to_dir(va)]))
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!= sizeof(ptbl)) {
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_kvm_syserr(kd, 0, "could not read L2 PTE");
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goto lose;
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}
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if (!ptbl) {
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_kvm_err(kd, 0, "invalid L2 PTE");
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goto lose;
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}
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if (_kvm_pread(kd, kd->pmfd, &data, sizeof(data),
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_kvm_pa2off(kd, (paddr_t)&ptbl[va_to_pte(va)]))
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!= sizeof(data)) {
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_kvm_syserr(kd, 0, "could not read TTE");
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goto lose;
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}
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if (data >= 0) {
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_kvm_err(kd, 0, "invalid L2 TTE");
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goto lose;
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}
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/*
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* Calculate page offsets and things.
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*
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* XXXX -- We could support multiple page sizes.
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*/
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va = va & (kd->nbpg - 1);
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data &= SUN4U_TLB_PA_MASK; /* XXX handle sun4u/sun4v */
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*pa = data + va;
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/*
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* Parse and trnslate our TTE.
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*/
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return (int)(kd->nbpg - va);
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lose:
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*pa = (u_long)-1;
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_kvm_err(kd, 0, "invalid address (%#"PRIxVADDR")", va);
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return (0);
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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_pa2off(kvm_t *kd, paddr_t pa)
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{
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cpu_kcore_hdr_t *cpup = kd->cpu_data;
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phys_ram_seg_t *mp;
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off_t off;
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int nmem;
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/*
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* Layout of CPU segment:
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* cpu_kcore_hdr_t;
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* [alignment]
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* phys_ram_seg_t[cpup->nmemseg];
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*/
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mp = (phys_ram_seg_t *)((long)kd->cpu_data + cpup->memsegoffset);
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off = 0;
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/* Translate (sparse) pfnum to (packed) dump offset */
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for (nmem = cpup->nmemseg; --nmem >= 0; mp++) {
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if (mp->start <= pa && pa < mp->start + mp->size)
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break;
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off += mp->size;
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}
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if (nmem < 0) {
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_kvm_err(kd, 0, "invalid address (%#"PRIxPADDR")", pa);
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return (-1);
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}
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return (kd->dump_off + off + pa - mp->start);
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}
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/*
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* Machine-dependent initialization for ALL open kvm descriptors,
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* not just those for a kernel crash dump. Some architectures
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* have to deal with these NOT being constants! (i.e. m68k)
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*/
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int
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_kvm_mdopen(kvm_t *kd)
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{
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u_long max_uva;
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extern struct ps_strings *__ps_strings;
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max_uva = (u_long) (__ps_strings + 1);
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kd->max_uva = max_uva;
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kd->min_uva = 0;
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return (0);
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}
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