kvm_m68k_cmn.c revision 1.7
1 /* $NetBSD: kvm_m68k_cmn.c,v 1.7 1997/10/12 11:01:23 briggs Exp $ */ 2 3 /*- 4 * Copyright (c) 1997 Jason R. Thorpe. All rights reserved. 5 * Copyright (c) 1989, 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software developed by the Computer Systems 9 * Engineering group at Lawrence Berkeley Laboratory under DARPA contract 10 * BG 91-66 and contributed to Berkeley. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 */ 40 41 #include <sys/cdefs.h> 42 #if defined(LIBC_SCCS) && !defined(lint) 43 #if 0 44 static char sccsid[] = "@(#)kvm_hp300.c 8.1 (Berkeley) 6/4/93"; 45 #else 46 __RCSID("$NetBSD: kvm_m68k_cmn.c,v 1.7 1997/10/12 11:01:23 briggs Exp $"); 47 #endif 48 #endif /* LIBC_SCCS and not lint */ 49 50 /* 51 * Common m68k machine dependent routines for kvm. 52 * 53 * Note: This file has to build on ALL m68k machines, 54 * so do NOT include any <machine / *.h> files here. 55 */ 56 57 #include <sys/types.h> 58 #include <sys/kcore.h> 59 60 #include <unistd.h> 61 #include <limits.h> 62 #include <nlist.h> 63 #include <kvm.h> 64 #include <db.h> 65 66 #include <m68k/cpu.h> 67 #include <m68k/kcore.h> 68 69 #include "kvm_private.h" 70 #include "kvm_m68k.h" 71 72 int _kvm_cmn_initvtop __P((kvm_t *)); 73 void _kvm_cmn_freevtop __P((kvm_t *)); 74 int _kvm_cmn_kvatop __P((kvm_t *, u_long, u_long *)); 75 off_t _kvm_cmn_pa2off __P((kvm_t *, u_long)); 76 77 struct kvm_ops _kvm_ops_cmn = { 78 _kvm_cmn_initvtop, 79 _kvm_cmn_freevtop, 80 _kvm_cmn_kvatop, 81 _kvm_cmn_pa2off }; 82 83 static int vatop_030 __P((kvm_t *, u_int32_t, u_long, u_long *)); 84 static int vatop_040 __P((kvm_t *, u_int32_t, u_long, u_long *)); 85 86 #define _kvm_btop(v, a) (((unsigned)(a)) >> (v)->pgshift) 87 88 #define KREAD(kd, addr, p)\ 89 (kvm_read(kd, addr, (char *)(p), sizeof(*(p))) != sizeof(*(p))) 90 91 void 92 _kvm_cmn_freevtop(kd) 93 kvm_t *kd; 94 { 95 /* No private state information to keep. */ 96 } 97 98 int 99 _kvm_cmn_initvtop(kd) 100 kvm_t *kd; 101 { 102 /* No private state information to keep. */ 103 return (0); 104 } 105 106 int 107 _kvm_cmn_kvatop(kd, va, pa) 108 kvm_t *kd; 109 u_long va; 110 u_long *pa; 111 { 112 cpu_kcore_hdr_t *h = kd->cpu_data; 113 struct m68k_kcore_hdr *m = &h->un._m68k; 114 int (*vtopf) __P((kvm_t *, u_int32_t, u_long, u_long *)); 115 116 if (ISALIVE(kd)) { 117 _kvm_err(kd, 0, "vatop called in live kernel!"); 118 return (0); 119 } 120 121 /* 122 * 68040 and 68060 use same translation functions, 123 * as do 68030, 68851, HP MMU. 124 */ 125 if (m->mmutype == MMU_68040 || m->mmutype == MMU_68060) 126 vtopf = vatop_040; 127 else 128 vtopf = vatop_030; 129 130 return ((*vtopf)(kd, m->sysseg_pa, va, pa)); 131 } 132 133 /* 134 * Translate a physical address to a file-offset in the crash-dump. 135 */ 136 off_t 137 _kvm_cmn_pa2off(kd, pa) 138 kvm_t *kd; 139 u_long pa; 140 { 141 cpu_kcore_hdr_t *h = kd->cpu_data; 142 struct m68k_kcore_hdr *m = &h->un._m68k; 143 phys_ram_seg_t *rsp; 144 off_t off; 145 int i; 146 147 off = 0; 148 rsp = m->ram_segs; 149 for (i = 0; i < M68K_NPHYS_RAM_SEGS && rsp[i].size != 0; i++) { 150 if (pa >= rsp[i].start && 151 pa < (rsp[i].start + rsp[i].size)) { 152 pa -= rsp[i].start; 153 break; 154 } 155 off += rsp[i].size; 156 } 157 return (kd->dump_off + off + pa); 158 } 159 160 /***************************************************************** 161 * Local stuff... 162 */ 163 164 static int 165 vatop_030(kd, stpa, va, pa) 166 kvm_t *kd; 167 u_int32_t stpa; 168 u_long va; 169 u_long *pa; 170 { 171 cpu_kcore_hdr_t *h = kd->cpu_data; 172 struct m68k_kcore_hdr *m = &h->un._m68k; 173 struct vmstate *vm = kd->vmst; 174 u_long addr; 175 u_int32_t ste, pte; 176 u_int p, offset; 177 178 offset = va & vm->pgofset; 179 180 /* 181 * We may be called before address translation is initialized. 182 * This is typically used to find the dump magic number. This 183 * means we do not yet have the kernel page tables available, 184 * so we must to a simple relocation. 185 */ 186 if (va < m->relocend) { 187 *pa = (va - h->kernbase) + m->reloc; 188 return (h->page_size - offset); 189 } 190 191 addr = stpa + ((va >> m->sg_ishift) * sizeof(u_int32_t)); 192 193 /* 194 * Can't use KREAD to read kernel segment table entries. 195 * Fortunately it is 1-to-1 mapped so we don't have to. 196 */ 197 if (stpa == m->sysseg_pa) { 198 if (lseek(kd->pmfd, _kvm_cmn_pa2off(kd, addr), 0) == -1 || 199 read(kd->pmfd, (char *)&ste, sizeof(ste)) < 0) 200 goto invalid; 201 } else if (KREAD(kd, addr, &ste)) 202 goto invalid; 203 if ((ste & m->sg_v) == 0) { 204 _kvm_err(kd, 0, "invalid segment (%x)", ste); 205 return(0); 206 } 207 p = _kvm_btop(vm, va & m->sg_pmask); 208 addr = (ste & m->sg_frame) + (p * sizeof(u_int32_t)); 209 210 /* 211 * Address from STE is a physical address so don't use kvm_read. 212 */ 213 if (lseek(kd->pmfd, _kvm_cmn_pa2off(kd, addr), 0) == -1 || 214 read(kd->pmfd, (char *)&pte, sizeof(pte)) < 0) 215 goto invalid; 216 addr = pte & m->pg_frame; 217 if ((pte & m->pg_v) == 0) { 218 _kvm_err(kd, 0, "page not valid"); 219 return (0); 220 } 221 *pa = addr + offset; 222 223 return (h->page_size - offset); 224 invalid: 225 _kvm_err(kd, 0, "invalid address (%x)", va); 226 return (0); 227 } 228 229 static int 230 vatop_040(kd, stpa, va, pa) 231 kvm_t *kd; 232 u_int32_t stpa; 233 u_long va; 234 u_long *pa; 235 { 236 cpu_kcore_hdr_t *h = kd->cpu_data; 237 struct m68k_kcore_hdr *m = &h->un._m68k; 238 struct vmstate *vm = kd->vmst; 239 u_long addr; 240 u_int32_t stpa2; 241 u_int32_t ste, pte; 242 u_int offset; 243 244 offset = va & vm->pgofset; 245 246 /* 247 * We may be called before address translation is initialized. 248 * This is typically used to find the dump magic number. This 249 * means we do not yet have the kernel page tables available, 250 * so we must to a simple relocation. 251 */ 252 if (va < m->relocend) { 253 *pa = (va - h->kernbase) + m->reloc; 254 return (h->page_size - offset); 255 } 256 257 addr = stpa + ((va >> m->sg40_shift1) * sizeof(u_int32_t)); 258 259 /* 260 * Can't use KREAD to read kernel segment table entries. 261 * Fortunately it is 1-to-1 mapped so we don't have to. 262 */ 263 if (stpa == m->sysseg_pa) { 264 if (lseek(kd->pmfd, _kvm_cmn_pa2off(kd, addr), 0) == -1 || 265 read(kd->pmfd, (char *)&ste, sizeof(ste)) < 0) 266 goto invalid; 267 } else if (KREAD(kd, addr, &ste)) 268 goto invalid; 269 if ((ste & m->sg_v) == 0) { 270 _kvm_err(kd, 0, "invalid level 1 descriptor (%x)", 271 ste); 272 return((off_t)0); 273 } 274 stpa2 = (ste & m->sg40_addr1); 275 addr = stpa2 + (((va & m->sg40_mask2) >> m->sg40_shift2) * 276 sizeof(u_int32_t)); 277 278 /* 279 * Address from level 1 STE is a physical address, 280 * so don't use kvm_read. 281 */ 282 if (lseek(kd->pmfd, _kvm_cmn_pa2off(kd, addr), 0) == -1 || 283 read(kd->pmfd, (char *)&ste, sizeof(ste)) < 0) 284 goto invalid; 285 if ((ste & m->sg_v) == 0) { 286 _kvm_err(kd, 0, "invalid level 2 descriptor (%x)", 287 ste); 288 return((off_t)0); 289 } 290 stpa2 = (ste & m->sg40_addr2); 291 addr = stpa2 + (((va & m->sg40_mask3) >> m->sg40_shift3) * 292 sizeof(u_int32_t)); 293 294 /* 295 * Address from STE is a physical address so don't use kvm_read. 296 */ 297 if (lseek(kd->pmfd, _kvm_cmn_pa2off(kd, addr), 0) == -1 || 298 read(kd->pmfd, (char *)&pte, sizeof(pte)) < 0) 299 goto invalid; 300 addr = pte & m->pg_frame; 301 if ((pte & m->pg_v) == 0) { 302 _kvm_err(kd, 0, "page not valid"); 303 return (0); 304 } 305 *pa = addr + offset; 306 307 return (h->page_size - offset); 308 309 invalid: 310 _kvm_err(kd, 0, "invalid address (%x)", va); 311 return (0); 312 } 313
Indexes created Sat Sep 20 22:09:52 GMT 2025