lib/libkvm/kvm_sparc64.c

   1 /*      $NetBSD: kvm_sparc64.c,v 1.12 2008/01/15 13:57:42 ad Exp $      */
   2
   3 /*-
   4  * Copyright (c) 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_sparc.c 8.1 (Berkeley) 6/4/93";
  40 #else
  41 __RCSID("$NetBSD: kvm_sparc64.c,v 1.12 2008/01/15 13:57:42 ad Exp $");
  42 #endif
  43 #endif /* LIBC_SCCS and not lint */
  44
  45 /*
  46  * Sparc machine dependent routines for kvm.  Hopefully, the forthcoming
  47  * vm code will one day obsolete this module.
  48  */
  49
  50 #include <sys/param.h>
  51 #include <sys/exec.h>
  52 #include <sys/user.h>
  53 #include <sys/proc.h>
  54 #include <sys/stat.h>
  55 #include <sys/core.h>
  56 #include <sys/kcore.h>
  57 #include <unistd.h>
  58 #include <nlist.h>
  59 #include <kvm.h>
  60
  61 #include <uvm/uvm_extern.h>
  62
  63 #include <machine/pmap.h>
  64 #include <machine/kcore.h>
  65 #include <machine/vmparam.h>
  66
  67 #include <limits.h>
  68 #include <db.h>
  69
  70 #include "kvm_private.h"
  71
  72 int _kvm_kvatop __P((kvm_t *, u_long, u_long *));
  73
  74 void
  75 _kvm_freevtop(kd)
  76         kvm_t *kd;
  77 {
  78         if (kd->vmst != 0) {
  79                 _kvm_err(kd, kd->program, "_kvm_freevtop: internal error");
  80                 kd->vmst = 0;
  81         }
  82 }
  83
  84 /*
  85  * Prepare for translation of kernel virtual addresses into offsets
  86  * into crash dump files. We use the MMU specific goop written at the
  87  * front of the crash dump by pmap_dumpmmu().
  88  *
  89  * We should read in and cache the ksegs here to speed up operations...
  90  */
  91 int
  92 _kvm_initvtop(kd)
  93         kvm_t *kd;
  94 {
  95         kd->nbpg = 0x2000;
  96
  97         return (0);
  98 }
  99
 100 /*
 101  * Translate a kernel virtual address to a physical address using the
 102  * mapping information in kd->vm.  Returns the result in pa, and returns
 103  * the number of bytes that are contiguously available from this
 104  * physical address.  This routine is used only for crash dumps.
 105  */
 106 int
 107 _kvm_kvatop(kd, va, pa)
 108         kvm_t *kd;
 109         u_long va;
 110         u_long *pa;
 111 {
 112         cpu_kcore_hdr_t *cpup = kd->cpu_data;
 113         u_long kernbase = cpup->kernbase;
 114         uint64_t *pseg, *pdir, *ptbl;
 115         struct cpu_kcore_4mbseg *ktlb;
 116         int64_t data;
 117         int i;
 118
 119         if (va < kernbase)
 120                 goto lose;
 121
 122         /* Handle the wired 4MB TTEs and per-CPU mappings */
 123         if (cpup->memsegoffset > sizeof(cpu_kcore_hdr_t) &&
 124             cpup->newmagic == SPARC64_KCORE_NEWMAGIC) {
 125                 /*
 126                  * new format: we have a list of 4 MB mappings
 127                  */
 128                 ktlb = (struct cpu_kcore_4mbseg *)
 129                         ((uintptr_t)kd->cpu_data + cpup->off4mbsegs);
 130                 for (i = 0; i < cpup->num4mbsegs; i++) {
 131                         uint64_t start = ktlb[i].va;
 132                         if (va < start || va >= start+PAGE_SIZE_4M)
 133                                 continue;
 134                         *pa = ktlb[i].pa + va - start;
 135                         return (int)(start+PAGE_SIZE_4M - va);
 136                 }
 137
 138                 if (cpup->numcpuinfos > 0) {
 139                         /* we have per-CPU mapping info */
 140                         uint64_t start, base;
 141
 142                         base = cpup->cpubase - 32*1024;
 143                         if (va >= base && va < (base + cpup->percpusz)) {
 144                                 start = va - base;
 145                                 *pa = cpup->cpusp
 146                                     + cpup->thiscpu*cpup->percpusz
 147                                     + start;
 148                                 return cpup->percpusz - start;
 149                         }
 150                 }
 151         } else {
 152                 /*
 153                  * old format: just a textbase/size and database/size
 154                  */
 155                 if (va > cpup->ktextbase && va <
 156                     (cpup->ktextbase + cpup->ktextsz)) {
 157                         u_long vaddr;
 158
 159                         vaddr = va - cpup->ktextbase;
 160                         *pa = cpup->ktextp + vaddr;
 161                         return (int)(cpup->ktextsz - vaddr);
 162                 }
 163                 if (va > cpup->kdatabase && va <
 164                     (cpup->kdatabase + cpup->kdatasz)) {
 165                         u_long vaddr;
 166
 167                         vaddr = va - cpup->kdatabase;
 168                         *pa = cpup->kdatap + vaddr;
 169                         return (int)(cpup->kdatasz - vaddr);
 170                 }
 171         }
 172
 173         /*
 174          * Parse kernel page table.
 175          */
 176         pseg = (uint64_t *)(u_long)cpup->segmapoffset;
 177         if (_kvm_pread(kd, kd->pmfd, &pdir, sizeof(pdir),
 178                 _kvm_pa2off(kd, (u_long)&pseg[va_to_seg(va)]))
 179                 != sizeof(pdir)) {
 180                 _kvm_syserr(kd, 0, "could not read L1 PTE");
 181                 goto lose;
 182         }
 183
 184         if (!pdir) {
 185                 _kvm_err(kd, 0, "invalid L1 PTE");
 186                 goto lose;
 187         }
 188
 189         if (_kvm_pread(kd, kd->pmfd, &ptbl, sizeof(ptbl),
 190                 _kvm_pa2off(kd, (u_long)&pdir[va_to_dir(va)]))
 191                 != sizeof(ptbl)) {
 192                 _kvm_syserr(kd, 0, "could not read L2 PTE");
 193                 goto lose;
 194         }
 195
 196         if (!ptbl) {
 197                 _kvm_err(kd, 0, "invalid L2 PTE");
 198                 goto lose;
 199         }
 200
 201         if (_kvm_pread(kd, kd->pmfd, &data, sizeof(data),
 202                 _kvm_pa2off(kd, (u_long)&ptbl[va_to_pte(va)]))
 203                 != sizeof(data)) {
 204                 _kvm_syserr(kd, 0, "could not read TTE");
 205                 goto lose;
 206         }
 207
 208         if (data >= 0) {
 209                 _kvm_err(kd, 0, "invalid L2 TTE");
 210                 goto lose;
 211         }
 212
 213         /*
 214          * Calculate page offsets and things.
 215          *
 216          * XXXX -- We could support multiple page sizes.
 217          */
 218         va = va & (kd->nbpg - 1);
 219         data &= TLB_PA_MASK;
 220         *pa = data + va;
 221
 222         /*
 223          * Parse and trnslate our TTE.
 224          */
 225
 226         return (int)(kd->nbpg - va);
 227
 228 lose:
 229         *pa = (u_long)-1;
 230         _kvm_err(kd, 0, "invalid address (%lx)", va);
 231         return (0);
 232 }
 233
 234
 235 /*
 236  * Translate a physical address to a file-offset in the crash dump.
 237  */
 238 off_t
 239 _kvm_pa2off(kd, pa)
 240         kvm_t   *kd;
 241         u_long  pa;
 242 {
 243         cpu_kcore_hdr_t *cpup = kd->cpu_data;
 244         phys_ram_seg_t *mp;
 245         off_t off;
 246         int nmem;
 247
 248         /*
 249          * Layout of CPU segment:
 250          *      cpu_kcore_hdr_t;
 251          *      [alignment]
 252          *      phys_ram_seg_t[cpup->nmemseg];
 253          */
 254         mp = (phys_ram_seg_t *)((long)kd->cpu_data + cpup->memsegoffset);
 255         off = 0;
 256
 257         /* Translate (sparse) pfnum to (packed) dump offset */
 258         for (nmem = cpup->nmemseg; --nmem >= 0; mp++) {
 259                 if (mp->start <= pa && pa < mp->start + mp->size)
 260                         break;
 261                 off += mp->size;
 262         }
 263         if (nmem < 0) {
 264                 _kvm_err(kd, 0, "invalid address (%lx)", pa);
 265                 return (-1);
 266         }
 267
 268         return (kd->dump_off + off + pa - mp->start);
 269 }
 270
 271 /*
 272  * Machine-dependent initialization for ALL open kvm descriptors,
 273  * not just those for a kernel crash dump.  Some architectures
 274  * have to deal with these NOT being constants!  (i.e. m68k)
 275  */
 276 int
 277 _kvm_mdopen(kd)
 278         kvm_t   *kd;
 279 {
 280         u_long max_uva;
 281         extern struct ps_strings *__ps_strings;
 282
 283         max_uva = (u_long) (__ps_strings + 1);
 284         kd->usrstack = max_uva;
 285         kd->max_uva  = max_uva;
 286         kd->min_uva  = 0;
 287
 288         return (0);
 289 }