1 /* $NetBSD: kvm_sparc64.c,v 1.11 2007/11/05 00:46:23 martin 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 1.11 2007/11/05 00:46:23 martin 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 */ 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 } else { 139 /* 140 * old format: just a textbase/size and database/size 141 */ 142 if (va > cpup->ktextbase && va < 143 (cpup->ktextbase + cpup->ktextsz)) { 144 u_long vaddr; 145 146 vaddr = va - cpup->ktextbase; 147 *pa = cpup->ktextp + vaddr; 148 return (int)(cpup->ktextsz - vaddr); 149 } 150 if (va > cpup->kdatabase && va < 151 (cpup->kdatabase + cpup->kdatasz)) { 152 u_long vaddr; 153 154 vaddr = va - cpup->kdatabase; 155 *pa = cpup->kdatap + vaddr; 156 return (int)(cpup->kdatasz - vaddr); 157 } 158 } 159 160 /* 161 * Parse kernel page table. 162 */ 163 pseg = (uint64_t *)(u_long)cpup->segmapoffset; 164 if (pread(kd->pmfd, &pdir, sizeof(pdir), 165 _kvm_pa2off(kd, (u_long)&pseg[va_to_seg(va)])) 166 != sizeof(pdir)) { 167 _kvm_syserr(kd, 0, "could not read L1 PTE"); 168 goto lose; 169 } 170 171 if (!pdir) { 172 _kvm_err(kd, 0, "invalid L1 PTE"); 173 goto lose; 174 } 175 176 if (pread(kd->pmfd, &ptbl, sizeof(ptbl), 177 _kvm_pa2off(kd, (u_long)&pdir[va_to_dir(va)])) 178 != sizeof(ptbl)) { 179 _kvm_syserr(kd, 0, "could not read L2 PTE"); 180 goto lose; 181 } 182 183 if (!ptbl) { 184 _kvm_err(kd, 0, "invalid L2 PTE"); 185 goto lose; 186 } 187 188 if (pread(kd->pmfd, &data, sizeof(data), 189 _kvm_pa2off(kd, (u_long)&ptbl[va_to_pte(va)])) 190 != sizeof(data)) { 191 _kvm_syserr(kd, 0, "could not read TTE"); 192 goto lose; 193 } 194 195 if (data >= 0) { 196 _kvm_err(kd, 0, "invalid L2 TTE"); 197 goto lose; 198 } 199 200 /* 201 * Calculate page offsets and things. 202 * 203 * XXXX -- We could support multiple page sizes. 204 */ 205 va = va & (kd->nbpg - 1); 206 data &= TLB_PA_MASK; 207 *pa = data + va; 208 209 /* 210 * Parse and trnslate our TTE. 211 */ 212 213 return (int)(kd->nbpg - va); 214 215 lose: 216 *pa = (u_long)-1; 217 _kvm_err(kd, 0, "invalid address (%lx)", va); 218 return (0); 219 } 220 221 222 /* 223 * Translate a physical address to a file-offset in the crash dump. 224 */ 225 off_t 226 _kvm_pa2off(kd, pa) 227 kvm_t *kd; 228 u_long pa; 229 { 230 cpu_kcore_hdr_t *cpup = kd->cpu_data; 231 phys_ram_seg_t *mp; 232 off_t off; 233 int nmem; 234 235 /* 236 * Layout of CPU segment: 237 * cpu_kcore_hdr_t; 238 * [alignment] 239 * phys_ram_seg_t[cpup->nmemseg]; 240 */ 241 mp = (phys_ram_seg_t *)((long)kd->cpu_data + cpup->memsegoffset); 242 off = 0; 243 244 /* Translate (sparse) pfnum to (packed) dump offset */ 245 for (nmem = cpup->nmemseg; --nmem >= 0; mp++) { 246 if (mp->start <= pa && pa < mp->start + mp->size) 247 break; 248 off += mp->size; 249 } 250 if (nmem < 0) { 251 _kvm_err(kd, 0, "invalid address (%lx)", pa); 252 return (-1); 253 } 254 255 return (kd->dump_off + off + pa - mp->start); 256 } 257 258 /* 259 * Machine-dependent initialization for ALL open kvm descriptors, 260 * not just those for a kernel crash dump. Some architectures 261 * have to deal with these NOT being constants! (i.e. m68k) 262 */ 263 int 264 _kvm_mdopen(kd) 265 kvm_t *kd; 266 { 267 u_long max_uva; 268 extern struct ps_strings *__ps_strings; 269 270 max_uva = (u_long) (__ps_strings + 1); 271 kd->usrstack = max_uva; 272 kd->max_uva = max_uva; 273 kd->min_uva = 0; 274 275 return (0); 276 } 277