lib/libkvm/kvm_hppa.c

   1 /*      $NetBSD: kvm_hppa.c,v 1.7 2014/02/19 20:21:22 dsl 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 1.7 2014/02/19 20:21:22 dsl 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/proc.h>
  53 #include <sys/stat.h>
  54 #include <sys/kcore.h>
  55 #include <sys/types.h>
  56
  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/kcore.h>
  70 #include <machine/pmap.h>
  71 #include <machine/pte.h>
  72 #include <machine/vmparam.h>
  73
  74 #ifndef btop
  75 #define btop(x)         (((unsigned)(x)) >> PGSHIFT)    /* XXX */
  76 #define ptob(x)         ((caddr_t)((x) << PGSHIFT))     /* XXX */
  77 #endif
  78
  79 void
  80 _kvm_freevtop(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(kvm_t *kd)
  91 {
  92
  93         return 0;
  94 }
  95
  96 /*
  97  * Translate a kernel virtual address to a physical address.
  98  */
  99 int
 100 _kvm_kvatop(kvm_t *kd, vaddr_t va, paddr_t *pa)
 101 {
 102 #if 0
 103         cpu_kcore_hdr_t *cpu_kh;
 104         u_long page_off;
 105         pd_entry_t pde;
 106         pt_entry_t pte;
 107         u_long pde_pa, pte_pa;
 108 #endif
 109
 110         if (ISALIVE(kd)) {
 111                 _kvm_err(kd, 0, "vatop called in live kernel!");
 112                 return 0;
 113         }
 114
 115         _kvm_syserr(kd, 0, "could not read PTE");
 116
 117 #if 0
 118         cpu_kh = kd->cpu_data;
 119         page_off = va & PGOFSET;
 120
 121         /*
 122          * Find and read the page directory entry.
 123          */
 124         pde_pa = cpu_kh->ptdpaddr + (pdei(va) * sizeof(pd_entry_t));
 125         if (_kvm_pread(kd, kd->pmfd, (void *)&pde, sizeof(pde),
 126             _kvm_pa2off(kd, pde_pa)) != sizeof(pde)) {
 127                 _kvm_syserr(kd, 0, "could not read PDE");
 128                 goto lose;
 129         }
 130
 131         /*
 132          * Find and read the page table entry.
 133          */
 134         if ((pde & PG_V) == 0) {
 135                 _kvm_err(kd, 0, "invalid translation (invalid PDE)");
 136                 goto lose;
 137         }
 138         pte_pa = (pde & PG_FRAME) + (ptei(va) * sizeof(pt_entry_t));
 139         if (_kvm_pread(kd, kd->pmfd, (void *) &pte, sizeof(pte),
 140             _kvm_pa2off(kd, pte_pa)) != sizeof(pte)) {
 141                 _kvm_syserr(kd, 0, "could not read PTE");
 142                 goto lose;
 143         }
 144
 145         /*
 146          * Validate the PTE and return the physical address.
 147          */
 148         if ((pte & PG_V) == 0) {
 149                 _kvm_err(kd, 0, "invalid translation (invalid PTE)");
 150                 goto lose;
 151         }
 152         *pa = (pte & PG_FRAME) + page_off;
 153         return (int)(NBPG - page_off);
 154
 155  lose:
 156 #endif
 157         *pa = (u_long)~0L;
 158         return 0;
 159 }
 160
 161 /*
 162  * Translate a physical address to a file-offset in the crash dump.
 163  */
 164 off_t
 165 _kvm_pa2off(kvm_t *kd, paddr_t pa)
 166 {
 167 #if 0
 168         cpu_kcore_hdr_t *cpu_kh;
 169         phys_ram_seg_t *ramsegs;
 170         off_t off;
 171         int i;
 172
 173         cpu_kh = kd->cpu_data;
 174         ramsegs = (void *)((char *)(void *)cpu_kh + ALIGN(sizeof *cpu_kh));
 175
 176         off = 0;
 177         for (i = 0; i < cpu_kh->nmemsegs; i++) {
 178                 if (pa >= ramsegs[i].start &&
 179                     (pa - ramsegs[i].start) < ramsegs[i].size) {
 180                         off += (pa - ramsegs[i].start);
 181                         break;
 182                 }
 183                 off += ramsegs[i].size;
 184         }
 185
 186         return kd->dump_off + off;
 187 #endif
 188         return 0;
 189 }
 190
 191 /*
 192  * Machine-dependent initialization for ALL open kvm descriptors,
 193  * not just those for a kernel crash dump.  Some architectures
 194  * have to deal with these NOT being constants!  (i.e. m68k)
 195  */
 196 int
 197 _kvm_mdopen(kvm_t *kd)
 198 {
 199
 200         kd->usrstack = USRSTACK;
 201         kd->min_uva = VM_MIN_ADDRESS;
 202         kd->max_uva = VM_MAXUSER_ADDRESS;
 203
 204         return 0;
 205 }