1 /* $OpenBSD: kvm_sparc64.c,v 1.3 2002/02/16 21:27:26 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. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 */ 40 41 #include <sys/cdefs.h> 42 43 /* 44 * Sparc machine dependent routines for kvm. Hopefully, the forthcoming 45 * vm code will one day obsolete this module. 46 */ 47 48 #include <sys/param.h> 49 #include <sys/exec.h> 50 #include <sys/user.h> 51 #include <sys/proc.h> 52 #include <sys/stat.h> 53 #include <sys/core.h> 54 #include <sys/kcore.h> 55 #include <unistd.h> 56 #include <nlist.h> 57 #include <kvm.h> 58 59 #include <uvm/uvm_extern.h> 60 61 #include <machine/vmparam.h> 62 #include <machine/pmap.h> 63 #include <machine/kcore.h> 64 65 #include <limits.h> 66 #include <db.h> 67 68 #include "kvm_private.h" 69 70 int _kvm_kvatop(kvm_t *, u_long, u_long *); 71 72 void 73 _kvm_freevtop(kd) 74 kvm_t *kd; 75 { 76 if (kd->vmst != 0) { 77 _kvm_err(kd, kd->program, "_kvm_freevtop: internal error"); 78 kd->vmst = 0; 79 } 80 } 81 82 /* 83 * Prepare for translation of kernel virtual addresses into offsets 84 * into crash dump files. We use the MMU specific goop written at the 85 * front of the crash dump by pmap_dumpmmu(). 86 * 87 * We should read in and cache the ksegs here to speed up operations... 88 */ 89 int 90 _kvm_initvtop(kd) 91 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 crashdumps. 103 */ 104 int 105 _kvm_kvatop(kd, va, pa) 106 kvm_t *kd; 107 u_long va; 108 u_long *pa; 109 { 110 cpu_kcore_hdr_t *cpup = kd->cpu_data; 111 u_long kernbase = cpup->kernbase; 112 uint64_t *pseg, *pdir, *ptbl; 113 int64_t data; 114 115 if (va < kernbase) 116 goto lose; 117 118 /* Handle the wired 4MB TTEs */ 119 if (va > cpup->ktextbase && va < (cpup->ktextbase + cpup->ktextsz)) { 120 u_long vaddr; 121 122 vaddr = va - cpup->ktextbase; 123 *pa = cpup->ktextp + vaddr; 124 return (cpup->ktextsz - vaddr); 125 } 126 127 if (va > cpup->kdatabase && va < (cpup->kdatabase + cpup->kdatasz)) { 128 u_long vaddr; 129 130 vaddr = va - cpup->kdatabase; 131 *pa = cpup->kdatap + vaddr; 132 return (cpup->kdatasz - vaddr); 133 } 134 135 136 /* 137 * Parse kernel page table. 138 */ 139 pseg = (uint64_t *)(u_long)cpup->segmapoffset; 140 if (pread(kd->pmfd, &pdir, sizeof(pdir), 141 _kvm_pa2off(kd, (u_long)&pseg[va_to_seg(va)])) 142 != sizeof(pdir)) { 143 _kvm_syserr(kd, 0, "could not read L1 PTE"); 144 goto lose; 145 } 146 147 if (!pdir) { 148 _kvm_err(kd, 0, "invalid L1 PTE"); 149 goto lose; 150 } 151 152 if (pread(kd->pmfd, &ptbl, sizeof(ptbl), 153 _kvm_pa2off(kd, (u_long)&pdir[va_to_dir(va)])) 154 != sizeof(ptbl)) { 155 _kvm_syserr(kd, 0, "could not read L2 PTE"); 156 goto lose; 157 } 158 159 if (!ptbl) { 160 _kvm_err(kd, 0, "invalid L2 PTE"); 161 goto lose; 162 } 163 164 if (pread(kd->pmfd, &data, sizeof(data), 165 _kvm_pa2off(kd, (u_long)&ptbl[va_to_pte(va)])) 166 != sizeof(data)) { 167 _kvm_syserr(kd, 0, "could not read TTE"); 168 goto lose; 169 } 170 171 if (data >= 0) { 172 _kvm_err(kd, 0, "invalid L2 TTE"); 173 goto lose; 174 } 175 176 /* 177 * Calculate page offsets and things. 178 * 179 * XXXX -- We could support multiple page sizes. 180 */ 181 va = va & (kd->nbpg - 1); 182 data &= TLB_PA_MASK; 183 *pa = data + va; 184 185 /* 186 * Parse and trnslate our TTE. 187 */ 188 189 return (kd->nbpg - va); 190 191 lose: 192 *pa = -1; 193 _kvm_err(kd, 0, "invalid address (%lx)", va); 194 return (0); 195 } 196 197 198 /* 199 * Translate a physical address to a file-offset in the crash-dump. 200 */ 201 off_t 202 _kvm_pa2off(kd, pa) 203 kvm_t *kd; 204 u_long pa; 205 { 206 cpu_kcore_hdr_t *cpup = kd->cpu_data; 207 phys_ram_seg_t *mp; 208 off_t off; 209 int nmem; 210 211 /* 212 * Layout of CPU segment: 213 * cpu_kcore_hdr_t; 214 * [alignment] 215 * phys_ram_seg_t[cpup->nmemseg]; 216 */ 217 mp = (phys_ram_seg_t *)((long)kd->cpu_data + cpup->memsegoffset); 218 off = 0; 219 220 /* Translate (sparse) pfnum to (packed) dump offset */ 221 for (nmem = cpup->nmemseg; --nmem >= 0; mp++) { 222 if (mp->start <= pa && pa < mp->start + mp->size) 223 break; 224 off += mp->size; 225 } 226 if (nmem < 0) { 227 _kvm_err(kd, 0, "invalid address (%lx)", pa); 228 return (-1); 229 } 230 231 return (kd->dump_off + off + pa - mp->start); 232 } 233 234