1 /* $NetBSD: kvm_sparc.c,v 1.36 2022/01/10 19:51:30 christos 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_sparc.c,v 1.36 2022/01/10 19:51:30 christos 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/proc.h> 53 #include <sys/stat.h> 54 #include <sys/core.h> 55 #include <sys/kcore.h> 56 #include <unistd.h> 57 #include <nlist.h> 58 #include <kvm.h> 59 60 #include <uvm/uvm_extern.h> 61 62 #include <sparc/pmap.h> 63 #include <sparc/kcore.h> 64 65 #include <limits.h> 66 #include <db.h> 67 68 #include "kvm_private.h" 69 70 71 static int cputyp = -1; 72 static int pgshift; 73 static int nptesg; /* [sun4/sun4c] only */ 74 75 #undef VA_VPG 76 #define VA_VPG(va) ((cputyp == CPU_SUN4C || cputyp == CPU_SUN4M) \ 77 ? VA_SUN4C_VPG(va) \ 78 : VA_SUN4_VPG(va)) 79 80 #undef VA_OFF 81 #define VA_OFF(va) (va & (kd->nbpg - 1)) 82 83 int _kvm_kvatop44c(kvm_t *, vaddr_t, paddr_t *); 84 int _kvm_kvatop4m (kvm_t *, vaddr_t, paddr_t *); 85 int _kvm_kvatop4u (kvm_t *, vaddr_t, paddr_t *); 86 87 /* 88 * XXX 89 * taken from /sys/arch/sparc64/include/kcore.h. 90 * this is the same as the sparc one, except for the kphys addition, 91 * so luckily we can use this here... 92 */ 93 typedef struct sparc64_cpu_kcore_hdr { 94 int cputype; /* CPU type associated with this dump */ 95 u_long kernbase; /* copy of KERNBASE goes here */ 96 int nmemseg; /* # of physical memory segments */ 97 u_long memsegoffset; /* start of memseg array (relative */ 98 /* to the start of this header) */ 99 int nsegmap; /* # of segmaps following */ 100 u_long segmapoffset; /* start of segmap array (relative */ 101 /* to the start of this header) */ 102 int npmeg; /* # of PMEGs; [sun4/sun4c] only */ 103 u_long pmegoffset; /* start of pmeg array (relative */ 104 /* to the start of this header) */ 105 /* SPARC64 stuff */ 106 paddr_t kphys; /* Physical address of 4MB locked TLB */ 107 } sparc64_cpu_kcore_hdr_t; 108 109 void 110 _kvm_freevtop(kvm_t *kd) 111 { 112 if (kd->vmst != 0) { 113 _kvm_err(kd, kd->program, "_kvm_freevtop: internal error"); 114 kd->vmst = 0; 115 } 116 } 117 118 /* 119 * Prepare for translation of kernel virtual addresses into offsets 120 * into crash dump files. We use the MMU specific goop written at the 121 * front of the crash dump by pmap_dumpmmu(). 122 */ 123 int 124 _kvm_initvtop(kvm_t *kd) 125 { 126 sparc64_cpu_kcore_hdr_t *cpup = kd->cpu_data; 127 128 switch (cputyp = cpup->cputype) { 129 case CPU_SUN4: 130 case CPU_SUN4U: 131 kd->nbpg = 8196; 132 pgshift = 13; 133 break; 134 case CPU_SUN4C: 135 case CPU_SUN4M: 136 kd->nbpg = 4096; 137 pgshift = 12; 138 break; 139 default: 140 _kvm_err(kd, kd->program, "Unsupported CPU type"); 141 return (-1); 142 } 143 nptesg = NBPSG / kd->nbpg; 144 return (0); 145 } 146 147 /* 148 * Translate a kernel virtual address to a physical address using the 149 * mapping information in kd->vm. Returns the result in pa, and returns 150 * the number of bytes that are contiguously available from this 151 * physical address. This routine is used only for crash dumps. 152 */ 153 int 154 _kvm_kvatop(kvm_t *kd, vaddr_t va, paddr_t *pa) 155 { 156 if (cputyp == -1) 157 if (_kvm_initvtop(kd) != 0) 158 return (-1); 159 160 switch (cputyp) { 161 case CPU_SUN4: 162 case CPU_SUN4C: 163 return _kvm_kvatop44c(kd, va, pa); 164 break; 165 case CPU_SUN4M: 166 return _kvm_kvatop4m(kd, va, pa); 167 break; 168 case CPU_SUN4U: 169 default: 170 return _kvm_kvatop4u(kd, va, pa); 171 } 172 } 173 174 /* 175 * (note: sun4 3-level MMU not yet supported) 176 */ 177 int 178 _kvm_kvatop44c(kvm_t *kd, vaddr_t va, paddr_t *pa) 179 { 180 int vr, vs, pte; 181 sparc64_cpu_kcore_hdr_t *cpup = kd->cpu_data; 182 struct segmap *sp, *segmaps; 183 int *ptes; 184 int nkreg, nureg; 185 u_long kernbase = cpup->kernbase; 186 187 if (va < kernbase) 188 goto err; 189 190 /* 191 * Layout of CPU segment: 192 * cpu_kcore_hdr_t; 193 * [alignment] 194 * phys_ram_seg_t[cpup->nmemseg]; 195 * segmap[cpup->nsegmap]; 196 * ptes[cpup->npmegs]; 197 */ 198 segmaps = (struct segmap *)((long)kd->cpu_data + cpup->segmapoffset); 199 ptes = (int *)((int)kd->cpu_data + cpup->pmegoffset); 200 nkreg = ((int)((-(unsigned)kernbase) / NBPRG)); 201 nureg = 256 - nkreg; 202 203 vr = VA_VREG(va); 204 vs = VA_VSEG(va); 205 206 sp = &segmaps[(vr-nureg)*NSEGRG + vs]; 207 if (sp->sg_npte == 0) 208 goto err; 209 if (sp->sg_pmeg == cpup->npmeg - 1) /* =seginval */ 210 goto err; 211 pte = ptes[sp->sg_pmeg * nptesg + VA_VPG(va)]; 212 if ((pte & PG_V) != 0) { 213 paddr_t p, off = VA_OFF(va); 214 215 p = (pte & PG_PFNUM) << pgshift; 216 *pa = p + off; 217 return (kd->nbpg - off); 218 } 219 err: 220 _kvm_err(kd, 0, "invalid address (%#"PRIxVADDR")", va); 221 return (0); 222 } 223 224 int 225 _kvm_kvatop4m(kvm_t *kd, vaddr_t va, paddr_t *pa) 226 { 227 sparc64_cpu_kcore_hdr_t *cpup = kd->cpu_data; 228 int vr, vs; 229 int pte; 230 off_t foff; 231 struct segmap *sp, *segmaps; 232 int nkreg, nureg; 233 u_long kernbase = cpup->kernbase; 234 235 if (va < kernbase) 236 goto err; 237 238 /* 239 * Layout of CPU segment: 240 * cpu_kcore_hdr_t; 241 * [alignment] 242 * phys_ram_seg_t[cpup->nmemseg]; 243 * segmap[cpup->nsegmap]; 244 */ 245 segmaps = (struct segmap *)((long)kd->cpu_data + cpup->segmapoffset); 246 nkreg = ((int)((-(unsigned)kernbase) / NBPRG)); 247 nureg = 256 - nkreg; 248 249 vr = VA_VREG(va); 250 vs = VA_VSEG(va); 251 252 sp = &segmaps[(vr-nureg)*NSEGRG + vs]; 253 if (sp->sg_npte == 0) 254 goto err; 255 256 /* XXX - assume page tables in initial kernel DATA or BSS. */ 257 foff = _kvm_pa2off(kd, (u_long)&sp->sg_pte[VA_VPG(va)] - kernbase); 258 if (foff == (off_t)-1) 259 return (0); 260 261 if (_kvm_pread(kd, kd->pmfd, &pte, sizeof(pte), foff) != sizeof(pte)) { 262 _kvm_syserr(kd, kd->program, "cannot read pte for " 263 "%#" PRIxVADDR, va); 264 return (0); 265 } 266 267 if ((pte & SRMMU_TETYPE) == SRMMU_TEPTE) { 268 long p, off = VA_OFF(va); 269 270 p = (pte & SRMMU_PPNMASK) << SRMMU_PPNPASHIFT; 271 *pa = p + off; 272 return (kd->nbpg - off); 273 } 274 err: 275 _kvm_err(kd, 0, "invalid address (%#"PRIxVADDR")", va); 276 return (0); 277 } 278 279 /* 280 * sparc64 pmap's 32-bit page table format 281 */ 282 int 283 _kvm_kvatop4u(kvm_t *kd, vaddr_t va, paddr_t *pa) 284 { 285 sparc64_cpu_kcore_hdr_t *cpup = kd->cpu_data; 286 int64_t **segmaps; 287 int64_t *ptes; 288 int64_t pte; 289 int64_t kphys = cpup->kphys; 290 u_long kernbase = cpup->kernbase; 291 292 if (va < kernbase) 293 goto err; 294 295 /* 296 * Kernel layout: 297 * 298 * kernbase: 299 * 4MB locked TLB (text+data+BSS) 300 * Random other stuff. 301 */ 302 if (va >= kernbase && va < kernbase + 4*1024*1024) 303 return (va - kernbase) + kphys; 304 305 /* XXX: from sparc64/include/pmap.h */ 306 #define SPARC64_PTSZ (kd->nbpg/8) 307 #define SPARC64_STSZ (SPARC64_PTSZ) 308 #define SPARC64_PTMASK (SPARC64_PTSZ-1) 309 #define SPARC64_PTSHIFT (13) 310 #define SPARC64_PDSHIFT (10+SPARC64_PTSHIFT) 311 #define SPARC64_STSHIFT (10+SPARC64_PDSHIFT) 312 #define SPARC64_STMASK (SPARC64_STSZ-1) 313 #define sparc64_va_to_seg(v) (int)((((int64_t)(v))>>SPARC64_STSHIFT)&SPARC64_STMASK) 314 #define sparc64_va_to_pte(v) (int)((((int64_t)(v))>>SPARC64_PTSHIFT)&SPARC64_PTMASK) 315 316 /* XXX: from sparc64/include/pte.h */ 317 #define SPARC64_TLB_V 0x8000000000000000LL 318 #define SPARC64_TLB_PA_MASK 0x000001ffffffe000LL 319 320 /* 321 * Layout of CPU segment: 322 * cpu_kcore_hdr_t; 323 * [alignment] 324 * phys_ram_seg_t[cpup->nmemseg]; 325 * segmap[cpup->nsegmap]; 326 */ 327 segmaps = (int64_t **)((long)kd->cpu_data + cpup->segmapoffset); 328 ptes = (int64_t *)(intptr_t)_kvm_pa2off(kd, 329 (paddr_t)(intptr_t)segmaps[sparc64_va_to_seg(va)]); 330 pte = ptes[sparc64_va_to_pte(va)]; 331 if ((pte & SPARC64_TLB_V) != 0) 332 return ((pte & SPARC64_TLB_PA_MASK) | (va & (kd->nbpg - 1))); 333 err: 334 _kvm_err(kd, 0, "invalid address (%#"PRIxVADDR")", va); 335 return (0); 336 } 337 338 339 /* 340 * Translate a physical address to a file-offset in the crash dump. 341 */ 342 off_t 343 _kvm_pa2off(kvm_t *kd, paddr_t pa) 344 { 345 sparc64_cpu_kcore_hdr_t *cpup = kd->cpu_data; 346 phys_ram_seg_t *mp; 347 off_t off; 348 int nmem; 349 350 /* 351 * Layout of CPU segment: 352 * cpu_kcore_hdr_t; 353 * [alignment] 354 * phys_ram_seg_t[cpup->nmemseg]; 355 */ 356 mp = (phys_ram_seg_t *)((int)kd->cpu_data + cpup->memsegoffset); 357 off = 0; 358 359 /* Translate (sparse) pfnum to (packed) dump offset */ 360 for (nmem = cpup->nmemseg; --nmem >= 0; mp++) { 361 if (mp->start <= pa && pa < mp->start + mp->size) 362 break; 363 off += mp->size; 364 } 365 if (nmem < 0) { 366 _kvm_err(kd, 0, "invalid address (%#"PRIxPADDR")", pa); 367 return (-1); 368 } 369 370 return (kd->dump_off + off + pa - mp->start); 371 } 372 373 /* 374 * Machine-dependent initialization for ALL open kvm descriptors, 375 * not just those for a kernel crash dump. Some architectures 376 * have to deal with these NOT being constants! (i.e. m68k) 377 */ 378 int 379 _kvm_mdopen(kvm_t *kd) 380 { 381 u_long max_uva; 382 extern struct ps_strings *__ps_strings; 383 384 max_uva = (u_long) (__ps_strings + 1); 385 kd->max_uva = max_uva; 386 kd->min_uva = 0; 387 388 return (0); 389 } 390
Indexes created Sat Sep 20 22:09:52 GMT 2025