lib/libkvm/kvm_sparc64.c

   1 /*      $NetBSD: kvm_sparc64.c,v 1.17 2014/02/21 18:00:09 palle 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 1.17 2014/02/21 18:00:09 palle 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/proc.h>
  53 #include <sys/stat.h>
  54 #include <sys/core.h>
  55 #include <sys/kcore.h>
  56 #include <sys/types.h>
  57
  58 #include <unistd.h>
  59 #include <nlist.h>
  60 #include <kvm.h>
  61
  62 #include <uvm/uvm_extern.h>
  63
  64 #include <machine/pmap.h>
  65 #include <machine/kcore.h>
  66 #include <machine/vmparam.h>
  67 #include <machine/param.h>
  68
  69 #include <limits.h>
  70 #include <db.h>
  71
  72 #include "kvm_private.h"
  73
  74 void
  75 _kvm_freevtop(kvm_t *kd)
  76 {
  77         if (kd->vmst != 0) {
  78                 _kvm_err(kd, kd->program, "_kvm_freevtop: internal error");
  79                 kd->vmst = 0;
  80         }
  81 }
  82
  83 /*
  84  * Prepare for translation of kernel virtual addresses into offsets
  85  * into crash dump files. We use the MMU specific goop written at the
  86  * front of the crash dump by pmap_dumpmmu().
  87  *
  88  * We should read in and cache the ksegs here to speed up operations...
  89  */
  90 int
  91 _kvm_initvtop(kvm_t *kd)
  92 {
  93         kd->nbpg = 0x2000;
  94
  95         return (0);
  96 }
  97
  98 /*
  99  * Translate a kernel virtual address to a physical address using the
 100  * mapping information in kd->vm.  Returns the result in pa, and returns
 101  * the number of bytes that are contiguously available from this
 102  * physical address.  This routine is used only for crash dumps.
 103  */
 104 int
 105 _kvm_kvatop(kvm_t *kd, vaddr_t va, paddr_t *pa)
 106 {
 107         cpu_kcore_hdr_t *cpup = kd->cpu_data;
 108         u_long kernbase = cpup->kernbase;
 109         uint64_t *pseg, *pdir, *ptbl;
 110         struct cpu_kcore_4mbseg *ktlb;
 111         int64_t data;
 112         int i;
 113
 114         if (va < kernbase)
 115                 goto lose;
 116
 117         /* Handle the wired 4MB TTEs and per-CPU mappings */
 118         if (cpup->memsegoffset > sizeof(cpu_kcore_hdr_t) &&
 119             cpup->newmagic == SPARC64_KCORE_NEWMAGIC) {
 120                 /*
 121                  * new format: we have a list of 4 MB mappings
 122                  */
 123                 ktlb = (struct cpu_kcore_4mbseg *)
 124                         ((uintptr_t)kd->cpu_data + cpup->off4mbsegs);
 125                 for (i = 0; i < cpup->num4mbsegs; i++) {
 126                         uint64_t start = ktlb[i].va;
 127                         if (va < start || va >= start+PAGE_SIZE_4M)
 128                                 continue;
 129                         *pa = ktlb[i].pa + va - start;
 130                         return (int)(start+PAGE_SIZE_4M - va);
 131                 }
 132
 133                 if (cpup->numcpuinfos > 0) {
 134                         /* we have per-CPU mapping info */
 135                         uint64_t start, base;
 136
 137                         base = cpup->cpubase - 32*1024;
 138                         if (va >= base && va < (base + cpup->percpusz)) {
 139                                 start = va - base;
 140                                 *pa = cpup->cpusp
 141                                     + cpup->thiscpu*cpup->percpusz
 142                                     + start;
 143                                 return cpup->percpusz - start;
 144                         }
 145                 }
 146         } else {
 147                 /*
 148                  * old format: just a textbase/size and database/size
 149                  */
 150                 if (va > cpup->ktextbase && va <
 151                     (cpup->ktextbase + cpup->ktextsz)) {
 152                         u_long vaddr;
 153
 154                         vaddr = va - cpup->ktextbase;
 155                         *pa = cpup->ktextp + vaddr;
 156                         return (int)(cpup->ktextsz - vaddr);
 157                 }
 158                 if (va > cpup->kdatabase && va <
 159                     (cpup->kdatabase + cpup->kdatasz)) {
 160                         u_long vaddr;
 161
 162                         vaddr = va - cpup->kdatabase;
 163                         *pa = cpup->kdatap + vaddr;
 164                         return (int)(cpup->kdatasz - vaddr);
 165                 }
 166         }
 167
 168         /*
 169          * Parse kernel page table.
 170          */
 171         pseg = (uint64_t *)(u_long)cpup->segmapoffset;
 172         if (_kvm_pread(kd, kd->pmfd, &pdir, sizeof(pdir),
 173                 _kvm_pa2off(kd, (paddr_t)&pseg[va_to_seg(va)]))
 174                 != sizeof(pdir)) {
 175                 _kvm_syserr(kd, 0, "could not read L1 PTE");
 176                 goto lose;
 177         }
 178
 179         if (!pdir) {
 180                 _kvm_err(kd, 0, "invalid L1 PTE");
 181                 goto lose;
 182         }
 183
 184         if (_kvm_pread(kd, kd->pmfd, &ptbl, sizeof(ptbl),
 185                 _kvm_pa2off(kd, (paddr_t)&pdir[va_to_dir(va)]))
 186                 != sizeof(ptbl)) {
 187                 _kvm_syserr(kd, 0, "could not read L2 PTE");
 188                 goto lose;
 189         }
 190
 191         if (!ptbl) {
 192                 _kvm_err(kd, 0, "invalid L2 PTE");
 193                 goto lose;
 194         }
 195
 196         if (_kvm_pread(kd, kd->pmfd, &data, sizeof(data),
 197                 _kvm_pa2off(kd, (paddr_t)&ptbl[va_to_pte(va)]))
 198                 != sizeof(data)) {
 199                 _kvm_syserr(kd, 0, "could not read TTE");
 200                 goto lose;
 201         }
 202
 203         if (data >= 0) {
 204                 _kvm_err(kd, 0, "invalid L2 TTE");
 205                 goto lose;
 206         }
 207
 208         /*
 209          * Calculate page offsets and things.
 210          *
 211          * XXXX -- We could support multiple page sizes.
 212          */
 213         va = va & (kd->nbpg - 1);
 214         data &= SUN4U_TLB_PA_MASK; /* XXX handle sun4u/sun4v */
 215         *pa = data + va;
 216
 217         /*
 218          * Parse and trnslate our TTE.
 219          */
 220
 221         return (int)(kd->nbpg - va);
 222
 223 lose:
 224         *pa = (u_long)-1;
 225         _kvm_err(kd, 0, "invalid address (%#"PRIxVADDR")", va);
 226         return (0);
 227 }
 228
 229
 230 /*
 231  * Translate a physical address to a file-offset in the crash dump.
 232  */
 233 off_t
 234 _kvm_pa2off(kvm_t *kd, paddr_t pa)
 235 {
 236         cpu_kcore_hdr_t *cpup = kd->cpu_data;
 237         phys_ram_seg_t *mp;
 238         off_t off;
 239         int nmem;
 240
 241         /*
 242          * Layout of CPU segment:
 243          *      cpu_kcore_hdr_t;
 244          *      [alignment]
 245          *      phys_ram_seg_t[cpup->nmemseg];
 246          */
 247         mp = (phys_ram_seg_t *)((long)kd->cpu_data + cpup->memsegoffset);
 248         off = 0;
 249
 250         /* Translate (sparse) pfnum to (packed) dump offset */
 251         for (nmem = cpup->nmemseg; --nmem >= 0; mp++) {
 252                 if (mp->start <= pa && pa < mp->start + mp->size)
 253                         break;
 254                 off += mp->size;
 255         }
 256         if (nmem < 0) {
 257                 _kvm_err(kd, 0, "invalid address (%#"PRIxPADDR")", pa);
 258                 return (-1);
 259         }
 260
 261         return (kd->dump_off + off + pa - mp->start);
 262 }
 263
 264 /*
 265  * Machine-dependent initialization for ALL open kvm descriptors,
 266  * not just those for a kernel crash dump.  Some architectures
 267  * have to deal with these NOT being constants!  (i.e. m68k)
 268  */
 269 int
 270 _kvm_mdopen(kvm_t *kd)
 271 {
 272         u_long max_uva;
 273         extern struct ps_strings *__ps_strings;
 274
 275         max_uva = (u_long) (__ps_strings + 1);
 276         kd->usrstack = max_uva;
 277         kd->max_uva  = max_uva;
 278         kd->min_uva  = 0;
 279
 280         return (0);
 281 }