lib/libkvm/kvm_hppa.c

   1 /*      $NetBSD: kvm_hppa.c,v 1.2 2003/08/07 16:44:37 agc Exp $ */
   2
   3 /*-
   4  * Copyright (c) 1989, 1992, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software developed by the Computer Systems
   8  * Engineering group at Lawrence Berkeley Laboratory under DARPA contract
   9  * BG 91-66 and contributed to Berkeley.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include <sys/cdefs.h>
  37 #if defined(LIBC_SCCS) && !defined(lint)
  38 #if 0
  39 static char sccsid[] = "@(#)kvm_hp300.c 8.1 (Berkeley) 6/4/93";
  40 #else
  41 __RCSID("$NetBSD: kvm_hppa.c,v 1.2 2003/08/07 16:44:37 agc Exp $");
  42 #endif
  43 #endif /* LIBC_SCCS and not lint */
  44
  45 /*
  46  * hppa machine dependent routines for kvm.
  47  * XXX fredette - largely unimplemented so far.  what is here
  48  * is lifted and disabled.
  49  */
  50
  51 #include <sys/param.h>
  52 #include <sys/user.h>
  53 #include <sys/proc.h>
  54 #include <sys/stat.h>
  55 #include <sys/kcore.h>
  56 #include <machine/kcore.h>
  57 #include <stdlib.h>
  58 #include <unistd.h>
  59 #include <nlist.h>
  60 #include <kvm.h>
  61
  62 #include <uvm/uvm_extern.h>
  63
  64 #include <limits.h>
  65 #include <db.h>
  66
  67 #include "kvm_private.h"
  68
  69 #include <machine/pmap.h>
  70 #include <machine/pte.h>
  71 #include <machine/vmparam.h>
  72
  73 #ifndef btop
  74 #define btop(x)         (((unsigned)(x)) >> PGSHIFT)    /* XXX */
  75 #define ptob(x)         ((caddr_t)((x) << PGSHIFT))     /* XXX */
  76 #endif
  77
  78 void
  79 _kvm_freevtop(kd)
  80         kvm_t *kd;
  81 {
  82
  83         /* Not actually used for anything right now, but safe. */
  84         if (kd->vmst != 0)
  85                 free(kd->vmst);
  86 }
  87
  88 /*ARGSUSED*/
  89 int
  90 _kvm_initvtop(kd)
  91         kvm_t *kd;
  92 {
  93
  94         return (0);
  95 }
  96
  97 /*
  98  * Translate a kernel virtual address to a physical address.
  99  */
 100 int
 101 _kvm_kvatop(kd, va, pa)
 102         kvm_t *kd;
 103         u_long va;
 104         u_long *pa;
 105 {
 106 #if 0
 107         cpu_kcore_hdr_t *cpu_kh;
 108         u_long page_off;
 109         pd_entry_t pde;
 110         pt_entry_t pte;
 111         u_long pde_pa, pte_pa;
 112 #endif
 113
 114         if (ISALIVE(kd)) {
 115                 _kvm_err(kd, 0, "vatop called in live kernel!");
 116                 return (0);
 117         }
 118
 119         _kvm_syserr(kd, 0, "could not read PTE");
 120
 121 #if 0
 122         cpu_kh = kd->cpu_data;
 123         page_off = va & PGOFSET;
 124
 125         /*
 126          * Find and read the page directory entry.
 127          */
 128         pde_pa = cpu_kh->ptdpaddr + (pdei(va) * sizeof(pd_entry_t));
 129         if (_kvm_pread(kd, kd->pmfd, (void *)&pde, sizeof(pde),
 130             _kvm_pa2off(kd, pde_pa)) != sizeof(pde)) {
 131                 _kvm_syserr(kd, 0, "could not read PDE");
 132                 goto lose;
 133         }
 134
 135         /*
 136          * Find and read the page table entry.
 137          */
 138         if ((pde & PG_V) == 0) {
 139                 _kvm_err(kd, 0, "invalid translation (invalid PDE)");
 140                 goto lose;
 141         }
 142         pte_pa = (pde & PG_FRAME) + (ptei(va) * sizeof(pt_entry_t));
 143         if (_kvm_pread(kd, kd->pmfd, (void *) &pte, sizeof(pte),
 144             _kvm_pa2off(kd, pte_pa)) != sizeof(pte)) {
 145                 _kvm_syserr(kd, 0, "could not read PTE");
 146                 goto lose;
 147         }
 148
 149         /*
 150          * Validate the PTE and return the physical address.
 151          */
 152         if ((pte & PG_V) == 0) {
 153                 _kvm_err(kd, 0, "invalid translation (invalid PTE)");
 154                 goto lose;
 155         }
 156         *pa = (pte & PG_FRAME) + page_off;
 157         return (int)(NBPG - page_off);
 158
 159  lose:
 160 #endif
 161         *pa = (u_long)~0L;
 162         return (0);
 163 }
 164
 165 /*
 166  * Translate a physical address to a file-offset in the crash dump.
 167  */
 168 off_t
 169 _kvm_pa2off(kd, pa)
 170         kvm_t *kd;
 171         u_long pa;
 172 {
 173 #if 0
 174         cpu_kcore_hdr_t *cpu_kh;
 175         phys_ram_seg_t *ramsegs;
 176         off_t off;
 177         int i;
 178
 179         cpu_kh = kd->cpu_data;
 180         ramsegs = (void *)((char *)(void *)cpu_kh + ALIGN(sizeof *cpu_kh));
 181
 182         off = 0;
 183         for (i = 0; i < cpu_kh->nmemsegs; i++) {
 184                 if (pa >= ramsegs[i].start &&
 185                     (pa - ramsegs[i].start) < ramsegs[i].size) {
 186                         off += (pa - ramsegs[i].start);
 187                         break;
 188                 }
 189                 off += ramsegs[i].size;
 190         }
 191
 192         return (kd->dump_off + off);
 193 #endif
 194         return 0;
 195 }
 196
 197 /*
 198  * Machine-dependent initialization for ALL open kvm descriptors,
 199  * not just those for a kernel crash dump.  Some architectures
 200  * have to deal with these NOT being constants!  (i.e. m68k)
 201  */
 202 int
 203 _kvm_mdopen(kd)
 204         kvm_t   *kd;
 205 {
 206
 207         kd->usrstack = USRSTACK;
 208         kd->min_uva = VM_MIN_ADDRESS;
 209         kd->max_uva = VM_MAXUSER_ADDRESS;
 210
 211         return (0);
 212 }