1 /* $OpenBSD: kvm_sparc64.c,v 1.4 2003/06/02 20:18:41 millert Exp $ */ 2 /* $NetBSD: kvm_sparc64.c,v 1.7 2001/08/05 03:33:15 matt Exp $ */ 3 4 /*- 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software developed by the Computer Systems 9 * Engineering group at Lawrence Berkeley Laboratory under DARPA contract 10 * BG 91-66 and contributed to Berkeley. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #include <sys/cdefs.h> 38 39 /* 40 * Sparc machine dependent routines for kvm. Hopefully, the forthcoming 41 * vm code will one day obsolete this module. 42 */ 43 44 #include <sys/param.h> 45 #include <sys/exec.h> 46 #include <sys/user.h> 47 #include <sys/proc.h> 48 #include <sys/stat.h> 49 #include <sys/core.h> 50 #include <sys/kcore.h> 51 #include <unistd.h> 52 #include <nlist.h> 53 #include <kvm.h> 54 55 #include <uvm/uvm_extern.h> 56 57 #include <machine/vmparam.h> 58 #include <machine/pmap.h> 59 #include <machine/kcore.h> 60 61 #include <limits.h> 62 #include <db.h> 63 64 #include "kvm_private.h" 65 66 int _kvm_kvatop(kvm_t *, u_long, u_long *); 67 68 void 69 _kvm_freevtop(kd) 70 kvm_t *kd; 71 { 72 if (kd->vmst != 0) { 73 _kvm_err(kd, kd->program, "_kvm_freevtop: internal error"); 74 kd->vmst = 0; 75 } 76 } 77 78 /* 79 * Prepare for translation of kernel virtual addresses into offsets 80 * into crash dump files. We use the MMU specific goop written at the 81 * front of the crash dump by pmap_dumpmmu(). 82 * 83 * We should read in and cache the ksegs here to speed up operations... 84 */ 85 int 86 _kvm_initvtop(kd) 87 kvm_t *kd; 88 { 89 kd->nbpg = 0x2000; 90 91 return (0); 92 } 93 94 /* 95 * Translate a kernel virtual address to a physical address using the 96 * mapping information in kd->vm. Returns the result in pa, and returns 97 * the number of bytes that are contiguously available from this 98 * physical address. This routine is used only for crashdumps. 99 */ 100 int 101 _kvm_kvatop(kd, va, pa) 102 kvm_t *kd; 103 u_long va; 104 u_long *pa; 105 { 106 cpu_kcore_hdr_t *cpup = kd->cpu_data; 107 u_long kernbase = cpup->kernbase; 108 uint64_t *pseg, *pdir, *ptbl; 109 int64_t data; 110 111 if (va < kernbase) 112 goto lose; 113 114 /* Handle the wired 4MB TTEs */ 115 if (va > cpup->ktextbase && va < (cpup->ktextbase + cpup->ktextsz)) { 116 u_long vaddr; 117 118 vaddr = va - cpup->ktextbase; 119 *pa = cpup->ktextp + vaddr; 120 return (cpup->ktextsz - vaddr); 121 } 122 123 if (va > cpup->kdatabase && va < (cpup->kdatabase + cpup->kdatasz)) { 124 u_long vaddr; 125 126 vaddr = va - cpup->kdatabase; 127 *pa = cpup->kdatap + vaddr; 128 return (cpup->kdatasz - vaddr); 129 } 130 131 132 /* 133 * Parse kernel page table. 134 */ 135 pseg = (uint64_t *)(u_long)cpup->segmapoffset; 136 if (pread(kd->pmfd, &pdir, sizeof(pdir), 137 _kvm_pa2off(kd, (u_long)&pseg[va_to_seg(va)])) 138 != sizeof(pdir)) { 139 _kvm_syserr(kd, 0, "could not read L1 PTE"); 140 goto lose; 141 } 142 143 if (!pdir) { 144 _kvm_err(kd, 0, "invalid L1 PTE"); 145 goto lose; 146 } 147 148 if (pread(kd->pmfd, &ptbl, sizeof(ptbl), 149 _kvm_pa2off(kd, (u_long)&pdir[va_to_dir(va)])) 150 != sizeof(ptbl)) { 151 _kvm_syserr(kd, 0, "could not read L2 PTE"); 152 goto lose; 153 } 154 155 if (!ptbl) { 156 _kvm_err(kd, 0, "invalid L2 PTE"); 157 goto lose; 158 } 159 160 if (pread(kd->pmfd, &data, sizeof(data), 161 _kvm_pa2off(kd, (u_long)&ptbl[va_to_pte(va)])) 162 != sizeof(data)) { 163 _kvm_syserr(kd, 0, "could not read TTE"); 164 goto lose; 165 } 166 167 if (data >= 0) { 168 _kvm_err(kd, 0, "invalid L2 TTE"); 169 goto lose; 170 } 171 172 /* 173 * Calculate page offsets and things. 174 * 175 * XXXX -- We could support multiple page sizes. 176 */ 177 va = va & (kd->nbpg - 1); 178 data &= TLB_PA_MASK; 179 *pa = data + va; 180 181 /* 182 * Parse and trnslate our TTE. 183 */ 184 185 return (kd->nbpg - va); 186 187 lose: 188 *pa = -1; 189 _kvm_err(kd, 0, "invalid address (%lx)", va); 190 return (0); 191 } 192 193 194 /* 195 * Translate a physical address to a file-offset in the crash-dump. 196 */ 197 off_t 198 _kvm_pa2off(kd, pa) 199 kvm_t *kd; 200 u_long pa; 201 { 202 cpu_kcore_hdr_t *cpup = kd->cpu_data; 203 phys_ram_seg_t *mp; 204 off_t off; 205 int nmem; 206 207 /* 208 * Layout of CPU segment: 209 * cpu_kcore_hdr_t; 210 * [alignment] 211 * phys_ram_seg_t[cpup->nmemseg]; 212 */ 213 mp = (phys_ram_seg_t *)((long)kd->cpu_data + cpup->memsegoffset); 214 off = 0; 215 216 /* Translate (sparse) pfnum to (packed) dump offset */ 217 for (nmem = cpup->nmemseg; --nmem >= 0; mp++) { 218 if (mp->start <= pa && pa < mp->start + mp->size) 219 break; 220 off += mp->size; 221 } 222 if (nmem < 0) { 223 _kvm_err(kd, 0, "invalid address (%lx)", pa); 224 return (-1); 225 } 226 227 return (kd->dump_off + off + pa - mp->start); 228 } 229 230