kvm_powerpc64.c revision 1.1
1 /* $NetBSD: kvm_powerpc64.c,v 1.1 2006/07/01 19:21:11 ross Exp $ */ 2 3 /* 4 * Copyright (c) 2005 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Allen Briggs for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 /*- 38 * Copyright (C) 1996 Wolfgang Solfrank. 39 * Copyright (C) 1996 TooLs GmbH. 40 * All rights reserved. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. All advertising materials mentioning features or use of this software 51 * must display the following acknowledgement: 52 * This product includes software developed by TooLs GmbH. 53 * 4. The name of TooLs GmbH may not be used to endorse or promote products 54 * derived from this software without specific prior written permission. 55 * 56 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 57 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 58 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 59 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 60 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 61 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 62 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 63 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 64 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 65 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 66 */ 67 68 /* 69 * PowerPC machine dependent routines for kvm. 70 */ 71 72 #include <sys/param.h> 73 #include <sys/exec.h> 74 75 #include <uvm/uvm_extern.h> 76 77 #include <db.h> 78 #include <limits.h> 79 #include <kvm.h> 80 #include <stdlib.h> 81 #include <unistd.h> 82 83 #include "kvm_private.h" 84 85 #include <sys/kcore.h> 86 #include <machine/kcore.h> 87 88 #include <powerpc/spr.h> 89 #include <powerpc/oea/bat.h> 90 #include <powerpc/oea/pte.h> 91 92 static int _kvm_match_601bat(kvm_t *kd, u_long va, u_long *pa, int *off); 93 static int _kvm_match_bat(kvm_t *kd, u_long va, u_long *pa, int *off); 94 static int _kvm_match_sr(kvm_t *kd, u_long va, u_long *pa, int *off); 95 static struct pte *_kvm_scan_pteg(struct pteg *pteg, uint32_t vsid, 96 uint32_t api, int secondary); 97 98 void 99 _kvm_freevtop(kd) 100 kvm_t *kd; 101 { 102 if (kd->vmst != 0) 103 free(kd->vmst); 104 } 105 106 /*ARGSUSED*/ 107 int 108 _kvm_initvtop(kd) 109 kvm_t *kd; 110 { 111 112 return 0; 113 } 114 115 #define SR_VSID_HASH_MASK 0x0007ffff 116 117 static struct pte * 118 _kvm_scan_pteg(pteg, vsid, api, secondary) 119 struct pteg *pteg; 120 uint32_t vsid; 121 uint32_t api; 122 int secondary; 123 { 124 struct pte *pte; 125 u_long ptehi; 126 int i; 127 128 for (i=0 ; i<8 ; i++) { 129 pte = &pteg->pt[i]; 130 ptehi = (u_long) pte->pte_hi; 131 if ((ptehi & PTE_VALID) == 0) 132 continue; 133 if ((ptehi & PTE_HID) != secondary) 134 continue; 135 if (((ptehi & PTE_VSID) >> PTE_VSID_SHFT) != vsid) 136 continue; 137 if (((ptehi & PTE_API) >> PTE_API_SHFT) != api) 138 continue; 139 return pte; 140 } 141 return NULL; 142 } 143 144 #define HASH_MASK 0x0007ffff 145 146 static int 147 _kvm_match_sr(kd, va, pa, off) 148 kvm_t *kd; 149 u_long va; 150 u_long *pa; 151 int *off; 152 { 153 cpu_kcore_hdr_t *cpu_kh; 154 struct pteg pteg; 155 struct pte *pte; 156 uint32_t sr, pgoff, vsid, pgidx, api, hash; 157 uint32_t htaborg, htabmask, mhash; 158 u_long pteg_vaddr; 159 160 cpu_kh = kd->cpu_data; 161 162 sr = cpu_kh->sr[(va >> 28) & 0xf]; 163 if ((sr & SR_TYPE) != 0) { 164 /* Direct-store segment (shouldn't be) */ 165 return 0; 166 } 167 168 pgoff = va & ADDR_POFF; 169 vsid = sr & SR_VSID; 170 pgidx = (va & ADDR_PIDX) >> ADDR_PIDX_SHFT; 171 api = pgidx >> 10; 172 hash = (vsid & HASH_MASK) ^ pgidx; 173 174 htaborg = cpu_kh->sdr1 & 0xffff0000; 175 htabmask = cpu_kh->sdr1 & 0x1ff; 176 177 mhash = (hash >> 10) & htabmask; 178 179 pteg_vaddr = ( htaborg & 0xfe000000) | ((hash & 0x3ff) << 6) 180 | ((htaborg & 0x01ff0000) | (mhash << 16)); 181 182 if (pread(kd->pmfd, (void *) &pteg, sizeof(pteg), 183 _kvm_pa2off(kd, pteg_vaddr)) != sizeof(pteg)) { 184 _kvm_syserr(kd, 0, "could not read primary PTEG"); 185 return 0; 186 } 187 188 if ((pte = _kvm_scan_pteg(&pteg, vsid, api, 0)) != NULL) { 189 *pa = (pte->pte_lo & PTE_RPGN) | pgoff; 190 *off = NBPG - pgoff; 191 return 1; 192 } 193 194 hash = (~hash) & HASH_MASK; 195 mhash = (hash >> 10) & htabmask; 196 197 pteg_vaddr = ( htaborg & 0xfe000000) | ((hash & 0x3ff) << 6) 198 | ((htaborg & 0x01ff0000) | (mhash << 16)); 199 200 if (pread(kd->pmfd, (void *) &pteg, sizeof(pteg), 201 _kvm_pa2off(kd, pteg_vaddr)) != sizeof(pteg)) { 202 _kvm_syserr(kd, 0, "could not read secondary PTEG"); 203 return 0; 204 } 205 206 if ((pte = _kvm_scan_pteg(&pteg, vsid, api, 0)) != NULL) { 207 *pa = (pte->pte_lo & PTE_RPGN) | pgoff; 208 *off = NBPG - pgoff; 209 return 1; 210 } 211 212 return 0; 213 } 214 215 /* 216 * Translate a KVA to a PA 217 */ 218 int 219 _kvm_kvatop(kd, va, pa) 220 kvm_t *kd; 221 u_long va; 222 u_long *pa; 223 { 224 cpu_kcore_hdr_t *cpu_kh; 225 int offs; 226 uint32_t pvr; 227 228 if (ISALIVE(kd)) { 229 _kvm_err(kd, 0, "vatop called in live kernel!"); 230 return 0; 231 } 232 233 cpu_kh = kd->cpu_data; 234 235 pvr = (cpu_kh->pvr >> 16); 236 237 switch (pvr) { 238 239 if (_kvm_match_sr(kd, va, pa, &offs)) 240 return offs; 241 242 /* No hit -- no translation */ 243 *pa = (u_long)~0UL; 244 return 0; 245 } 246 247 off_t 248 _kvm_pa2off(kd, pa) 249 kvm_t *kd; 250 u_long pa; 251 { 252 cpu_kcore_hdr_t *cpu_kh; 253 phys_ram_seg_t *ram; 254 off_t off; 255 void *e; 256 257 cpu_kh = kd->cpu_data; 258 e = (char *) kd->cpu_data + kd->cpu_dsize; 259 ram = (void *)((char *)(void *)cpu_kh + ALIGN(sizeof *cpu_kh)); 260 off = kd->dump_off; 261 do { 262 if (pa >= ram->start && (pa - ram->start) < ram->size) { 263 return off + (pa - ram->start); 264 } 265 ram++; 266 off += ram->size; 267 } while ((void *) ram < e && ram->size); 268 269 _kvm_err(kd, 0, "pa2off failed for pa 0x%08lx\n", pa); 270 return (off_t) -1; 271 } 272 273 /* 274 * Machine-dependent initialization for ALL open kvm descriptors, 275 * not just those for a kernel crash dump. Some architectures 276 * have to deal with these NOT being constants! (i.e. m68k) 277 */ 278 int 279 _kvm_mdopen(kd) 280 kvm_t *kd; 281 { 282 uintptr_t max_uva; 283 extern struct ps_strings *__ps_strings; 284 285 #if 0 /* XXX - These vary across powerpc machines... */ 286 kd->usrstack = USRSTACK; 287 kd->min_uva = VM_MIN_ADDRESS; 288 kd->max_uva = VM_MAXUSER_ADDRESS; 289 #endif 290 /* This is somewhat hack-ish, but it works. */ 291 max_uva = (uintptr_t) (__ps_strings + 1); 292 kd->usrstack = max_uva; 293 kd->max_uva = max_uva; 294 kd->min_uva = 0; 295 296 return (0); 297 } 298
Indexes created Tue Sep 30 10:09:55 GMT 2025