298 lines
8.0 KiB
C
298 lines
8.0 KiB
C
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/* $NetBSD: kvm_powerpc64.c,v 1.1 2006/07/01 19:21:11 ross Exp $ */
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/*
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* Copyright (c) 2005 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Allen Briggs for Wasabi Systems, Inc.
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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 for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* 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 WASABI SYSTEMS, INC
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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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/*-
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* Copyright (C) 1996 Wolfgang Solfrank.
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* Copyright (C) 1996 TooLs GmbH.
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* All rights reserved.
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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 TooLs GmbH.
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* 4. The name of TooLs GmbH may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* PowerPC machine dependent routines for kvm.
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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 <uvm/uvm_extern.h>
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#include <db.h>
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#include <limits.h>
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#include <kvm.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "kvm_private.h"
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#include <sys/kcore.h>
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#include <machine/kcore.h>
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#include <powerpc/spr.h>
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#include <powerpc/oea/bat.h>
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#include <powerpc/oea/pte.h>
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static int _kvm_match_601bat(kvm_t *kd, u_long va, u_long *pa, int *off);
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static int _kvm_match_bat(kvm_t *kd, u_long va, u_long *pa, int *off);
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static int _kvm_match_sr(kvm_t *kd, u_long va, u_long *pa, int *off);
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static struct pte *_kvm_scan_pteg(struct pteg *pteg, uint32_t vsid,
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uint32_t api, int secondary);
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void
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_kvm_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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/*ARGSUSED*/
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int
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_kvm_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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#define SR_VSID_HASH_MASK 0x0007ffff
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static struct pte *
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_kvm_scan_pteg(pteg, vsid, api, secondary)
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struct pteg *pteg;
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uint32_t vsid;
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uint32_t api;
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int secondary;
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{
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struct pte *pte;
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u_long ptehi;
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int i;
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for (i=0 ; i<8 ; i++) {
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pte = &pteg->pt[i];
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ptehi = (u_long) pte->pte_hi;
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if ((ptehi & PTE_VALID) == 0)
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continue;
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if ((ptehi & PTE_HID) != secondary)
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continue;
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if (((ptehi & PTE_VSID) >> PTE_VSID_SHFT) != vsid)
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continue;
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if (((ptehi & PTE_API) >> PTE_API_SHFT) != api)
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continue;
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return pte;
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}
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return NULL;
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}
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#define HASH_MASK 0x0007ffff
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static int
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_kvm_match_sr(kd, va, pa, off)
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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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int *off;
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{
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cpu_kcore_hdr_t *cpu_kh;
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struct pteg pteg;
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struct pte *pte;
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uint32_t sr, pgoff, vsid, pgidx, api, hash;
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uint32_t htaborg, htabmask, mhash;
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u_long pteg_vaddr;
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cpu_kh = kd->cpu_data;
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sr = cpu_kh->sr[(va >> 28) & 0xf];
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if ((sr & SR_TYPE) != 0) {
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/* Direct-store segment (shouldn't be) */
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return 0;
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}
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pgoff = va & ADDR_POFF;
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vsid = sr & SR_VSID;
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pgidx = (va & ADDR_PIDX) >> ADDR_PIDX_SHFT;
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api = pgidx >> 10;
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hash = (vsid & HASH_MASK) ^ pgidx;
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htaborg = cpu_kh->sdr1 & 0xffff0000;
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htabmask = cpu_kh->sdr1 & 0x1ff;
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mhash = (hash >> 10) & htabmask;
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pteg_vaddr = ( htaborg & 0xfe000000) | ((hash & 0x3ff) << 6)
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| ((htaborg & 0x01ff0000) | (mhash << 16));
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if (pread(kd->pmfd, (void *) &pteg, sizeof(pteg),
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_kvm_pa2off(kd, pteg_vaddr)) != sizeof(pteg)) {
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_kvm_syserr(kd, 0, "could not read primary PTEG");
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return 0;
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}
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if ((pte = _kvm_scan_pteg(&pteg, vsid, api, 0)) != NULL) {
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*pa = (pte->pte_lo & PTE_RPGN) | pgoff;
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*off = NBPG - pgoff;
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return 1;
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}
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hash = (~hash) & HASH_MASK;
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mhash = (hash >> 10) & htabmask;
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pteg_vaddr = ( htaborg & 0xfe000000) | ((hash & 0x3ff) << 6)
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| ((htaborg & 0x01ff0000) | (mhash << 16));
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if (pread(kd->pmfd, (void *) &pteg, sizeof(pteg),
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_kvm_pa2off(kd, pteg_vaddr)) != sizeof(pteg)) {
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_kvm_syserr(kd, 0, "could not read secondary PTEG");
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return 0;
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}
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if ((pte = _kvm_scan_pteg(&pteg, vsid, api, 0)) != NULL) {
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*pa = (pte->pte_lo & PTE_RPGN) | pgoff;
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*off = NBPG - pgoff;
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return 1;
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}
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return 0;
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}
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/*
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* Translate a KVA to a PA
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*/
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int
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_kvm_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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cpu_kcore_hdr_t *cpu_kh;
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int offs;
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uint32_t pvr;
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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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pvr = (cpu_kh->pvr >> 16);
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switch (pvr) {
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if (_kvm_match_sr(kd, va, pa, &offs))
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return offs;
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/* No hit -- no translation */
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*pa = (u_long)~0UL;
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return 0;
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}
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off_t
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_kvm_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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cpu_kcore_hdr_t *cpu_kh;
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phys_ram_seg_t *ram;
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off_t off;
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void *e;
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cpu_kh = kd->cpu_data;
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e = (char *) kd->cpu_data + kd->cpu_dsize;
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ram = (void *)((char *)(void *)cpu_kh + ALIGN(sizeof *cpu_kh));
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off = kd->dump_off;
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do {
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if (pa >= ram->start && (pa - ram->start) < ram->size) {
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return off + (pa - ram->start);
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}
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ram++;
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off += ram->size;
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} while ((void *) ram < e && ram->size);
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_kvm_err(kd, 0, "pa2off failed for pa 0x%08lx\n", pa);
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return (off_t) -1;
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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(kd)
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kvm_t *kd;
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{
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uintptr_t max_uva;
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extern struct ps_strings *__ps_strings;
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#if 0 /* XXX - These vary across powerpc machines... */
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kd->usrstack = USRSTACK;
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kd->min_uva = VM_MIN_ADDRESS;
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kd->max_uva = VM_MAXUSER_ADDRESS;
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#endif
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/* This is somewhat hack-ish, but it works. */
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max_uva = (uintptr_t) (__ps_strings + 1);
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kd->usrstack = max_uva;
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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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