kvm_sparc.c revision 1.13
1 /* $NetBSD: kvm_sparc.c,v 1.13 1997/08/15 02:22:03 mikel 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 #include <sys/cdefs.h> 41 #if defined(LIBC_SCCS) && !defined(lint) 42 #if 0 43 static char sccsid[] = "@(#)kvm_sparc.c 8.1 (Berkeley) 6/4/93"; 44 #else 45 __RCSID("$NetBSD: kvm_sparc.c,v 1.13 1997/08/15 02:22:03 mikel Exp $"); 46 #endif 47 #endif /* LIBC_SCCS and not lint */ 48 49 /* 50 * Sparc machine dependent routines for kvm. Hopefully, the forthcoming 51 * vm code will one day obsolete this module. 52 */ 53 54 #include <sys/param.h> 55 #include <sys/user.h> 56 #include <sys/proc.h> 57 #include <sys/stat.h> 58 #include <sys/core.h> 59 #include <sys/kcore.h> 60 #include <unistd.h> 61 #include <nlist.h> 62 #include <kvm.h> 63 64 #include <vm/vm.h> 65 #include <vm/vm_param.h> 66 #include <machine/autoconf.h> 67 #include <machine/kcore.h> 68 69 #include <limits.h> 70 #include <db.h> 71 72 #include "kvm_private.h" 73 74 75 static int cputyp = -1; 76 static int pgshift; 77 static int nptesg; /* [sun4/sun4c] only */ 78 79 #define VA_VPG(va) ((cputyp == CPU_SUN4C || cputyp == CPU_SUN4M) \ 80 ? VA_SUN4C_VPG(va) \ 81 : VA_SUN4_VPG(va)) 82 83 #define VA_OFF(va) (va & (kd->nbpg - 1)) 84 85 86 void 87 _kvm_freevtop(kd) 88 kvm_t *kd; 89 { 90 if (kd->vmst != 0) { 91 _kvm_err(kd, kd->program, "_kvm_freevtop: internal error"); 92 kd->vmst = 0; 93 } 94 } 95 96 /* 97 * Prepare for translation of kernel virtual addresses into offsets 98 * into crash dump files. We use the MMU specific goop written at the 99 * front of the crash dump by pmap_dumpmmu(). 100 */ 101 int 102 _kvm_initvtop(kd) 103 kvm_t *kd; 104 { 105 cpu_kcore_hdr_t *cpup = kd->cpu_data; 106 107 switch (cputyp = cpup->cputype) { 108 case CPU_SUN4: 109 kd->nbpg = 8196; 110 pgshift = 13; 111 break; 112 case CPU_SUN4C: 113 case CPU_SUN4M: 114 kd->nbpg = 4096; 115 pgshift = 12; 116 break; 117 default: 118 _kvm_err(kd, kd->program, "Unsupported CPU type"); 119 return (-1); 120 } 121 nptesg = NBPSG / kd->nbpg; 122 return (0); 123 } 124 125 /* 126 * Translate a kernel virtual address to a physical address using the 127 * mapping information in kd->vm. Returns the result in pa, and returns 128 * the number of bytes that are contiguously available from this 129 * physical address. This routine is used only for crashdumps. 130 */ 131 int 132 _kvm_kvatop(kd, va, pa) 133 kvm_t *kd; 134 u_long va; 135 u_long *pa; 136 { 137 if (cputyp == -1) 138 if (_kvm_initvtop(kd) != 0) 139 return (-1); 140 141 return ((cputyp == CPU_SUN4M) 142 ? _kvm_kvatop4m(kd, va, pa) 143 : _kvm_kvatop44c(kd, va, pa)); 144 } 145 146 /* 147 * (note: sun4 3-level MMU not yet supported) 148 */ 149 int 150 _kvm_kvatop44c(kd, va, pa) 151 kvm_t *kd; 152 u_long va; 153 u_long *pa; 154 { 155 register int vr, vs, pte; 156 cpu_kcore_hdr_t *cpup = kd->cpu_data; 157 struct regmap *rp; 158 struct segmap *sp; 159 int *ptes; 160 161 if (va < KERNBASE) 162 goto err; 163 164 /* 165 * Layout of CPU segment: 166 * cpu_kcore_hdr_t; 167 * [alignment] 168 * phys_ram_seg_t[cpup->nmemseg]; 169 * ptes[cpup->npmegs]; 170 */ 171 ptes = (int *)((int)kd->cpu_data + cpup->pmegoffset); 172 173 vr = VA_VREG(va); 174 vs = VA_VSEG(va); 175 176 sp = &cpup->segmap_store[(vr-NUREG)*NSEGRG + vs]; 177 if (sp->sg_npte == 0) 178 goto err; 179 if (sp->sg_pmeg == cpup->npmeg - 1) /* =seginval */ 180 goto err; 181 pte = ptes[sp->sg_pmeg * nptesg + VA_VPG(va)]; 182 if ((pte & PG_V) != 0) { 183 register long p, off = VA_OFF(va); 184 185 p = (pte & PG_PFNUM) << pgshift; 186 *pa = p + off; 187 return (kd->nbpg - off); 188 } 189 err: 190 _kvm_err(kd, 0, "invalid address (%x)", va); 191 return (0); 192 } 193 194 int 195 _kvm_kvatop4m(kd, va, pa) 196 kvm_t *kd; 197 u_long va; 198 u_long *pa; 199 { 200 cpu_kcore_hdr_t *cpup = kd->cpu_data; 201 register int vr, vs; 202 int pte; 203 off_t foff; 204 struct regmap *rp; 205 struct segmap *sp; 206 207 if (va < KERNBASE) 208 goto err; 209 210 /* 211 * Layout of CPU segment: 212 * cpu_kcore_hdr_t; 213 * [alignment] 214 * phys_ram_seg_t[cpup->nmemseg]; 215 */ 216 217 vr = VA_VREG(va); 218 vs = VA_VSEG(va); 219 220 sp = &cpup->segmap_store[(vr-NUREG)*NSEGRG + vs]; 221 if (sp->sg_npte == 0) 222 goto err; 223 224 /* XXX - assume page tables in initial kernel DATA or BSS. */ 225 foff = _kvm_pa2off(kd, (u_long)&sp->sg_pte[VA_VPG(va)] - KERNBASE); 226 if (foff == (off_t)-1) 227 return (0); 228 229 if (lseek(kd->pmfd, foff, 0) == -1 || 230 read(kd->pmfd, (void *)&pte, sizeof(pte)) < 0) { 231 _kvm_err(kd, kd->program, "cannot read pte for %x", va); 232 return (0); 233 } 234 235 if ((pte & SRMMU_TETYPE) == SRMMU_TEPTE) { 236 register long p, off = VA_OFF(va); 237 238 p = (pte & SRMMU_PPNMASK) << SRMMU_PPNPASHIFT; 239 *pa = p + off; 240 return (kd->nbpg - off); 241 } 242 err: 243 _kvm_err(kd, 0, "invalid address (%x)", va); 244 return (0); 245 } 246 247 /* 248 * Translate a physical address to a file-offset in the crash-dump. 249 */ 250 off_t 251 _kvm_pa2off(kd, pa) 252 kvm_t *kd; 253 u_long pa; 254 { 255 cpu_kcore_hdr_t *cpup = kd->cpu_data; 256 phys_ram_seg_t *mp; 257 off_t off; 258 int nmem; 259 260 /* 261 * Layout of CPU segment: 262 * cpu_kcore_hdr_t; 263 * [alignment] 264 * phys_ram_seg_t[cpup->nmemseg]; 265 */ 266 mp = (phys_ram_seg_t *)((int)kd->cpu_data + cpup->memsegoffset); 267 off = 0; 268 269 /* Translate (sparse) pfnum to (packed) dump offset */ 270 for (nmem = cpup->nmemseg; --nmem >= 0; mp++) { 271 if (mp->start <= pa && pa < mp->start + mp->size) 272 break; 273 off += mp->size; 274 } 275 if (nmem < 0) { 276 _kvm_err(kd, 0, "invalid address (%x)", pa); 277 return (-1); 278 } 279 280 return (kd->dump_off + off + pa - mp->start); 281 } 282 283 /* 284 * Machine-dependent initialization for ALL open kvm descriptors, 285 * not just those for a kernel crash dump. Some architectures 286 * have to deal with these NOT being constants! (i.e. m68k) 287 */ 288 int 289 _kvm_mdopen(kd) 290 kvm_t *kd; 291 { 292 293 kd->usrstack = USRSTACK; 294 kd->min_uva = VM_MIN_ADDRESS; 295 kd->max_uva = VM_MAXUSER_ADDRESS; 296 297 return (0); 298 } 299
Indexes created Thu Sep 25 02:09:54 GMT 2025