kvm_sparc.c revision 1.9
1 /* $NetBSD: kvm_sparc.c,v 1.9 1996/04/01 19:23:03 cgd 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. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the University of 22 * California, Berkeley and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 */ 39 40 #if defined(LIBC_SCCS) && !defined(lint) 41 #if 0 42 static char sccsid[] = "@(#)kvm_sparc.c 8.1 (Berkeley) 6/4/93"; 43 #else 44 static char *rcsid = "$NetBSD: kvm_sparc.c,v 1.9 1996/04/01 19:23:03 cgd Exp $"; 45 #endif 46 #endif /* LIBC_SCCS and not lint */ 47 48 /* 49 * Sparc machine dependent routines for kvm. Hopefully, the forthcoming 50 * vm code will one day obsolete this module. 51 */ 52 53 #include <sys/param.h> 54 #include <sys/user.h> 55 #include <sys/proc.h> 56 #include <sys/stat.h> 57 #include <sys/sysctl.h> 58 #include <sys/device.h> 59 #include <unistd.h> 60 #include <nlist.h> 61 #include <kvm.h> 62 63 #include <vm/vm.h> 64 #include <vm/vm_param.h> 65 #include <machine/autoconf.h> 66 67 #include <limits.h> 68 #include <db.h> 69 70 #include "kvm_private.h" 71 72 #define MA_SIZE 32 /* XXX */ 73 struct vmstate { 74 struct { 75 int x_seginval; /* [sun4/sun4c] only */ 76 int x_npmemarr; 77 struct memarr x_pmemarr[MA_SIZE]; 78 struct segmap x_segmap_store[NKREG*NSEGRG]; 79 } x; 80 #define seginval x.x_seginval 81 #define npmemarr x.x_npmemarr 82 #define pmemarr x.x_pmemarr 83 #define segmap_store x.x_segmap_store 84 int *pte; /* [sun4/sun4c] only */ 85 }; 86 #define NPMEG(vm) ((vm)->seginval+1) 87 88 static int cputyp = -1; 89 90 static int pgshift, nptesg; 91 92 #define VA_VPG(va) ((cputyp == CPU_SUN4C || cputyp == CPU_SUN4M) \ 93 ? VA_SUN4C_VPG(va) \ 94 : VA_SUN4_VPG(va)) 95 96 static int _kvm_mustinit __P((kvm_t *)); 97 98 #if 0 99 static int 100 getcputyp() 101 { 102 int mib[2]; 103 size_t size; 104 105 mib[0] = CTL_HW; 106 mib[1] = HW_CLASS; 107 size = sizeof cputyp; 108 if (sysctl(mib, 2, &cputyp, &size, NULL, 0) == -1) 109 return (-1); 110 } 111 #endif 112 113 static int 114 _kvm_mustinit(kd) 115 kvm_t *kd; 116 { 117 static struct nlist nlist[2] = { 118 # define X_CPUTYP 0 119 { "_cputyp" }, 120 { NULL }, 121 }; 122 off_t foff; 123 124 if (cputyp != -1) 125 return 0; 126 127 for (pgshift = 12; (1 << pgshift) != kd->nbpg; pgshift++) 128 ; 129 nptesg = NBPSG / kd->nbpg; 130 131 if (kvm_nlist(kd, nlist) != 0) { 132 _kvm_err(kd, kd->program, "cannot find `cputyp' symbol"); 133 return (-1); 134 } 135 /* Assume kernel mappings are all within first memory bank. */ 136 foff = nlist[X_CPUTYP].n_value - KERNBASE; 137 if (lseek(kd->pmfd, foff, 0) == -1 || 138 read(kd->pmfd, &cputyp, sizeof(cputyp)) < 0) { 139 _kvm_err(kd, kd->program, "cannot read `cputyp"); 140 return (-1); 141 } 142 if (cputyp != CPU_SUN4 && 143 cputyp != CPU_SUN4C && 144 cputyp != CPU_SUN4M) 145 return (-1); 146 147 return (0); 148 } 149 150 void 151 _kvm_freevtop(kd) 152 kvm_t *kd; 153 { 154 if (kd->vmst != 0) { 155 if (kd->vmst->pte != 0) 156 free(kd->vmst->pte); 157 free(kd->vmst); 158 kd->vmst = 0; 159 } 160 } 161 162 /* 163 * Translate a kernel virtual address to a physical address using the 164 * mapping information in kd->vm. Returns the result in pa, and returns 165 * the number of bytes that are contiguously available from this 166 * physical address. This routine is used only for crashdumps. 167 */ 168 int 169 _kvm_kvatop(kd, va, pa) 170 kvm_t *kd; 171 u_long va; 172 u_long *pa; 173 { 174 if (_kvm_mustinit(kd) != 0) 175 return (-1); 176 177 return ((cputyp == CPU_SUN4M) 178 ? _kvm_kvatop4m(kd, va, pa) 179 : _kvm_kvatop44c(kd, va, pa)); 180 } 181 182 /* 183 * Prepare for translation of kernel virtual addresses into offsets 184 * into crash dump files. We use the MMU specific goop written at the 185 * and of crash dump by pmap_dumpmmu(). 186 * (note: sun4/sun4c 2-level MMU specific) 187 */ 188 int 189 _kvm_initvtop(kd) 190 kvm_t *kd; 191 { 192 if (_kvm_mustinit(kd) != 0) 193 return (-1); 194 195 return ((cputyp == CPU_SUN4M) 196 ? _kvm_initvtop4m(kd) 197 : _kvm_initvtop44c(kd)); 198 } 199 200 #define VA_OFF(va) (va & (kd->nbpg - 1)) 201 202 203 /* 204 * We use the MMU specific goop written at the end of crash dump 205 * by pmap_dumpmmu(). 206 * (note: sun4 3-level MMU not yet supported) 207 */ 208 int 209 _kvm_initvtop44c(kd) 210 kvm_t *kd; 211 { 212 register struct vmstate *vm; 213 register int i; 214 off_t foff; 215 struct stat st; 216 217 if ((vm = kd->vmst) == 0) { 218 kd->vmst = vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm)); 219 if (vm == 0) 220 return (-1); 221 } 222 223 if (fstat(kd->pmfd, &st) < 0) 224 return (-1); 225 /* 226 * Read segment table. 227 */ 228 229 foff = st.st_size - roundup(sizeof(vm->x), kd->nbpg); 230 errno = 0; 231 if (lseek(kd->pmfd, (off_t)foff, 0) == -1 && errno != 0 || 232 read(kd->pmfd, (char *)&vm->x, sizeof(vm->x)) < 0) { 233 _kvm_err(kd, kd->program, "cannot read segment map"); 234 return (-1); 235 } 236 237 vm->pte = (int *)_kvm_malloc(kd, NPMEG(vm) * nptesg * sizeof(int)); 238 if (vm->pte == 0) { 239 free(kd->vmst); 240 kd->vmst = 0; 241 return (-1); 242 } 243 244 /* 245 * Read PMEGs. 246 */ 247 foff = st.st_size - roundup(sizeof(vm->x), kd->nbpg) - 248 roundup(NPMEG(vm) * nptesg * sizeof(int), kd->nbpg); 249 250 errno = 0; 251 if (lseek(kd->pmfd, foff, 0) == -1 && errno != 0 || 252 read(kd->pmfd, (char *)vm->pte, NPMEG(vm) * nptesg * sizeof(int)) < 0) { 253 _kvm_err(kd, kd->program, "cannot read PMEG table"); 254 return (-1); 255 } 256 257 return (0); 258 } 259 260 int 261 _kvm_kvatop44c(kd, va, pa) 262 kvm_t *kd; 263 u_long va; 264 u_long *pa; 265 { 266 register int vr, vs, pte, off, nmem; 267 register struct vmstate *vm = kd->vmst; 268 struct regmap *rp; 269 struct segmap *sp; 270 struct memarr *mp; 271 272 if (va < KERNBASE) 273 goto err; 274 275 vr = VA_VREG(va); 276 vs = VA_VSEG(va); 277 278 sp = &vm->segmap_store[(vr-NUREG)*NSEGRG + vs]; 279 if (sp->sg_npte == 0) 280 goto err; 281 if (sp->sg_pmeg == vm->seginval) 282 goto err; 283 pte = vm->pte[sp->sg_pmeg * nptesg + VA_VPG(va)]; 284 if ((pte & PG_V) != 0) { 285 register long p, dumpoff = 0; 286 287 off = VA_OFF(va); 288 p = (pte & PG_PFNUM) << pgshift; 289 /* Translate (sparse) pfnum to (packed) dump offset */ 290 for (mp = vm->pmemarr, nmem = vm->npmemarr; --nmem >= 0; mp++) { 291 if (mp->addr <= p && p < mp->addr + mp->len) 292 break; 293 dumpoff += mp->len; 294 } 295 if (nmem < 0) 296 goto err; 297 *pa = (dumpoff + p - mp->addr) | off; 298 return (kd->nbpg - off); 299 } 300 err: 301 _kvm_err(kd, 0, "invalid address (%x)", va); 302 return (0); 303 } 304 305 /* 306 * Prepare for translation of kernel virtual addresses into offsets 307 * into crash dump files. Since the sun4m pagetables are all in memory, 308 * we use nlist to bootstrap the translation tables. This assumes that 309 * the kernel mappings all reside in the first physical memory bank. 310 */ 311 int 312 _kvm_initvtop4m(kd) 313 kvm_t *kd; 314 { 315 register int i; 316 register off_t foff; 317 register struct vmstate *vm; 318 struct stat st; 319 static struct nlist nlist[4] = { 320 # define X_KSEGSTORE 0 321 { "_kernel_segmap_store" }, 322 # define X_PMEMARR 1 323 { "_pmemarr" }, 324 # define X_NPMEMARR 2 325 { "_npmemarr" }, 326 { NULL }, 327 }; 328 329 if ((vm = kd->vmst) == 0) { 330 kd->vmst = vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm)); 331 if (vm == 0) 332 return (-1); 333 } 334 335 if (kvm_nlist(kd, nlist) != 0) { 336 _kvm_err(kd, kd->program, "cannot read symbols"); 337 return (-1); 338 } 339 340 /* Assume kernel mappings are all within first memory bank. */ 341 foff = nlist[X_KSEGSTORE].n_value - KERNBASE; 342 if (lseek(kd->pmfd, foff, 0) == -1 || 343 read(kd->pmfd, vm->segmap_store, sizeof(vm->segmap_store)) < 0) { 344 _kvm_err(kd, kd->program, "cannot read segment map"); 345 return (-1); 346 } 347 348 foff = nlist[X_PMEMARR].n_value - KERNBASE; 349 if (lseek(kd->pmfd, foff, 0) == -1 || 350 read(kd->pmfd, vm->pmemarr, sizeof(vm->pmemarr)) < 0) { 351 _kvm_err(kd, kd->program, "cannot read pmemarr"); 352 return (-1); 353 } 354 355 foff = nlist[X_NPMEMARR].n_value - KERNBASE; 356 if (lseek(kd->pmfd, foff, 0) == -1 || 357 read(kd->pmfd, &vm->npmemarr, sizeof(vm->npmemarr)) < 0) { 358 _kvm_err(kd, kd->program, "cannot read npmemarr"); 359 return (-1); 360 } 361 362 return (0); 363 } 364 365 int 366 _kvm_kvatop4m(kd, va, pa) 367 kvm_t *kd; 368 u_long va; 369 u_long *pa; 370 { 371 register struct vmstate *vm = kd->vmst; 372 register int vr, vs, nmem, off; 373 int pte; 374 off_t foff; 375 struct regmap *rp; 376 struct segmap *sp; 377 struct memarr *mp; 378 379 if (va < KERNBASE) 380 goto err; 381 382 vr = VA_VREG(va); 383 vs = VA_VSEG(va); 384 385 sp = &vm->segmap_store[(vr-NUREG)*NSEGRG + vs]; 386 if (sp->sg_npte == 0) 387 goto err; 388 389 /* Assume kernel mappings are all within first memory bank. */ 390 foff = (long)&sp->sg_pte[VA_VPG(va)] - KERNBASE; 391 if (lseek(kd->pmfd, foff, 0) == -1 || 392 read(kd->pmfd, (void *)&pte, sizeof(pte)) < 0) { 393 _kvm_err(kd, kd->program, "cannot read pte"); 394 goto err; 395 } 396 397 if ((pte & SRMMU_TETYPE) == SRMMU_TEPTE) { 398 register long p, dumpoff = 0; 399 400 off = VA_OFF(va); 401 p = (pte & SRMMU_PPNMASK) << SRMMU_PPNPASHIFT; 402 /* Translate (sparse) pfnum to (packed) dump offset */ 403 for (mp = vm->pmemarr, nmem = vm->npmemarr; --nmem >= 0; mp++) { 404 if (mp->addr <= p && p < mp->addr + mp->len) 405 break; 406 dumpoff += mp->len; 407 } 408 if (nmem < 0) 409 goto err; 410 *pa = (dumpoff + p - mp->addr) | off; 411 return (kd->nbpg - off); 412 } 413 err: 414 _kvm_err(kd, 0, "invalid address (%x)", va); 415 return (0); 416 } 417
Indexes created Sat Sep 27 14:09:57 GMT 2025