1 /* $OpenBSD: kvm_sparc64.c,v 1.1 2001/08/28 21:49:16 art 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/pmap.h> 62 #include <machine/kcore.h> 63 64 #include <limits.h> 65 #include <db.h> 66 67 #include "kvm_private.h" 68 69 int _kvm_kvatop __P((kvm_t *, u_long, u_long *)); 70 71 void 72 _kvm_freevtop(kd) 73 kvm_t *kd; 74 { 75 if (kd->vmst != 0) { 76 _kvm_err(kd, kd->program, "_kvm_freevtop: internal error"); 77 kd->vmst = 0; 78 } 79 } 80 81 /* 82 * Prepare for translation of kernel virtual addresses into offsets 83 * into crash dump files. We use the MMU specific goop written at the 84 * front of the crash dump by pmap_dumpmmu(). 85 * 86 * We should read in and cache the ksegs here to speed up operations... 87 */ 88 int 89 _kvm_initvtop(kd) 90 kvm_t *kd; 91 { 92 kd->nbpg = 0x2000; 93 94 return (0); 95 } 96 97 /* 98 * Translate a kernel virtual address to a physical address using the 99 * mapping information in kd->vm. Returns the result in pa, and returns 100 * the number of bytes that are contiguously available from this 101 * physical address. This routine is used only for crashdumps. 102 */ 103 int 104 _kvm_kvatop(kd, va, pa) 105 kvm_t *kd; 106 u_long va; 107 u_long *pa; 108 { 109 cpu_kcore_hdr_t *cpup = kd->cpu_data; 110 u_long kernbase = cpup->kernbase; 111 uint64_t *pseg, *pdir, *ptbl; 112 int64_t data; 113 114 if (va < kernbase) 115 goto lose; 116 117 /* Handle the wired 4MB TTEs */ 118 if (va > cpup->ktextbase && va < (cpup->ktextbase + cpup->ktextsz)) { 119 u_long vaddr; 120 121 vaddr = va - cpup->ktextbase; 122 *pa = cpup->ktextp + vaddr; 123 return (cpup->ktextsz - vaddr); 124 } 125 126 if (va > cpup->kdatabase && va < (cpup->kdatabase + cpup->kdatasz)) { 127 u_long vaddr; 128 129 vaddr = va - cpup->kdatabase; 130 *pa = cpup->kdatap + vaddr; 131 return (cpup->kdatasz - vaddr); 132 } 133 134 135 /* 136 * Parse kernel page table. 137 */ 138 pseg = (uint64_t *)(u_long)cpup->segmapoffset; 139 if (pread(kd->pmfd, &pdir, sizeof(pdir), 140 _kvm_pa2off(kd, (u_long)&pseg[va_to_seg(va)])) 141 != sizeof(pdir)) { 142 _kvm_syserr(kd, 0, "could not read L1 PTE"); 143 goto lose; 144 } 145 146 if (!pdir) { 147 _kvm_err(kd, 0, "invalid L1 PTE"); 148 goto lose; 149 } 150 151 if (pread(kd->pmfd, &ptbl, sizeof(ptbl), 152 _kvm_pa2off(kd, (u_long)&pdir[va_to_dir(va)])) 153 != sizeof(ptbl)) { 154 _kvm_syserr(kd, 0, "could not read L2 PTE"); 155 goto lose; 156 } 157 158 if (!ptbl) { 159 _kvm_err(kd, 0, "invalid L2 PTE"); 160 goto lose; 161 } 162 163 if (pread(kd->pmfd, &data, sizeof(data), 164 _kvm_pa2off(kd, (u_long)&ptbl[va_to_pte(va)])) 165 != sizeof(data)) { 166 _kvm_syserr(kd, 0, "could not read TTE"); 167 goto lose; 168 } 169 170 if (data >= 0) { 171 _kvm_err(kd, 0, "invalid L2 TTE"); 172 goto lose; 173 } 174 175 /* 176 * Calculate page offsets and things. 177 * 178 * XXXX -- We could support multiple page sizes. 179 */ 180 va = va & (kd->nbpg - 1); 181 data &= TLB_PA_MASK; 182 *pa = data + va; 183 184 /* 185 * Parse and trnslate our TTE. 186 */ 187 188 return (kd->nbpg - va); 189 190 lose: 191 *pa = -1; 192 _kvm_err(kd, 0, "invalid address (%lx)", va); 193 return (0); 194 } 195 196 197 /* 198 * Translate a physical address to a file-offset in the crash-dump. 199 */ 200 off_t 201 _kvm_pa2off(kd, pa) 202 kvm_t *kd; 203 u_long pa; 204 { 205 cpu_kcore_hdr_t *cpup = kd->cpu_data; 206 phys_ram_seg_t *mp; 207 off_t off; 208 int nmem; 209 210 /* 211 * Layout of CPU segment: 212 * cpu_kcore_hdr_t; 213 * [alignment] 214 * phys_ram_seg_t[cpup->nmemseg]; 215 */ 216 mp = (phys_ram_seg_t *)((long)kd->cpu_data + cpup->memsegoffset); 217 off = 0; 218 219 /* Translate (sparse) pfnum to (packed) dump offset */ 220 for (nmem = cpup->nmemseg; --nmem >= 0; mp++) { 221 if (mp->start <= pa && pa < mp->start + mp->size) 222 break; 223 off += mp->size; 224 } 225 if (nmem < 0) { 226 _kvm_err(kd, 0, "invalid address (%lx)", pa); 227 return (-1); 228 } 229 230 return (kd->dump_off + off + pa - mp->start); 231 } 232 233