1 /* $NetBSD: kvm_sparc64.c,v 1.9 2003/05/16 10:24:56 wiz 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_sparc64.c,v 1.9 2003/05/16 10:24:56 wiz 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/exec.h> 56 #include <sys/user.h> 57 #include <sys/proc.h> 58 #include <sys/stat.h> 59 #include <sys/core.h> 60 #include <sys/kcore.h> 61 #include <unistd.h> 62 #include <nlist.h> 63 #include <kvm.h> 64 65 #include <uvm/uvm_extern.h> 66 67 #include <machine/pmap.h> 68 #include <machine/kcore.h> 69 #include <machine/vmparam.h> 70 71 #include <limits.h> 72 #include <db.h> 73 74 #include "kvm_private.h" 75 76 int _kvm_kvatop __P((kvm_t *, u_long, u_long *)); 77 78 void 79 _kvm_freevtop(kd) 80 kvm_t *kd; 81 { 82 if (kd->vmst != 0) { 83 _kvm_err(kd, kd->program, "_kvm_freevtop: internal error"); 84 kd->vmst = 0; 85 } 86 } 87 88 /* 89 * Prepare for translation of kernel virtual addresses into offsets 90 * into crash dump files. We use the MMU specific goop written at the 91 * front of the crash dump by pmap_dumpmmu(). 92 * 93 * We should read in and cache the ksegs here to speed up operations... 94 */ 95 int 96 _kvm_initvtop(kd) 97 kvm_t *kd; 98 { 99 kd->nbpg = 0x2000; 100 101 return (0); 102 } 103 104 /* 105 * Translate a kernel virtual address to a physical address using the 106 * mapping information in kd->vm. Returns the result in pa, and returns 107 * the number of bytes that are contiguously available from this 108 * physical address. This routine is used only for crash dumps. 109 */ 110 int 111 _kvm_kvatop(kd, va, pa) 112 kvm_t *kd; 113 u_long va; 114 u_long *pa; 115 { 116 cpu_kcore_hdr_t *cpup = kd->cpu_data; 117 u_long kernbase = cpup->kernbase; 118 uint64_t *pseg, *pdir, *ptbl; 119 int64_t data; 120 121 if (va < kernbase) 122 goto lose; 123 124 /* Handle the wired 4MB TTEs */ 125 if (va > cpup->ktextbase && va < (cpup->ktextbase + cpup->ktextsz)) { 126 u_long vaddr; 127 128 vaddr = va - cpup->ktextbase; 129 *pa = cpup->ktextp + vaddr; 130 return (cpup->ktextsz - vaddr); 131 } 132 133 if (va > cpup->kdatabase && va < (cpup->kdatabase + cpup->kdatasz)) { 134 u_long vaddr; 135 136 vaddr = va - cpup->kdatabase; 137 *pa = cpup->kdatap + vaddr; 138 return (cpup->kdatasz - vaddr); 139 } 140 141 142 /* 143 * Parse kernel page table. 144 */ 145 pseg = (uint64_t *)(u_long)cpup->segmapoffset; 146 if (pread(kd->pmfd, &pdir, sizeof(pdir), 147 _kvm_pa2off(kd, (u_long)&pseg[va_to_seg(va)])) 148 != sizeof(pdir)) { 149 _kvm_syserr(kd, 0, "could not read L1 PTE"); 150 goto lose; 151 } 152 153 if (!pdir) { 154 _kvm_err(kd, 0, "invalid L1 PTE"); 155 goto lose; 156 } 157 158 if (pread(kd->pmfd, &ptbl, sizeof(ptbl), 159 _kvm_pa2off(kd, (u_long)&pdir[va_to_dir(va)])) 160 != sizeof(ptbl)) { 161 _kvm_syserr(kd, 0, "could not read L2 PTE"); 162 goto lose; 163 } 164 165 if (!ptbl) { 166 _kvm_err(kd, 0, "invalid L2 PTE"); 167 goto lose; 168 } 169 170 if (pread(kd->pmfd, &data, sizeof(data), 171 _kvm_pa2off(kd, (u_long)&ptbl[va_to_pte(va)])) 172 != sizeof(data)) { 173 _kvm_syserr(kd, 0, "could not read TTE"); 174 goto lose; 175 } 176 177 if (data >= 0) { 178 _kvm_err(kd, 0, "invalid L2 TTE"); 179 goto lose; 180 } 181 182 /* 183 * Calculate page offsets and things. 184 * 185 * XXXX -- We could support multiple page sizes. 186 */ 187 va = va & (kd->nbpg - 1); 188 data &= TLB_PA_MASK; 189 *pa = data + va; 190 191 /* 192 * Parse and trnslate our TTE. 193 */ 194 195 return (kd->nbpg - va); 196 197 lose: 198 *pa = -1; 199 _kvm_err(kd, 0, "invalid address (%lx)", va); 200 return (0); 201 } 202 203 204 /* 205 * Translate a physical address to a file-offset in the crash dump. 206 */ 207 off_t 208 _kvm_pa2off(kd, pa) 209 kvm_t *kd; 210 u_long pa; 211 { 212 cpu_kcore_hdr_t *cpup = kd->cpu_data; 213 phys_ram_seg_t *mp; 214 off_t off; 215 int nmem; 216 217 /* 218 * Layout of CPU segment: 219 * cpu_kcore_hdr_t; 220 * [alignment] 221 * phys_ram_seg_t[cpup->nmemseg]; 222 */ 223 mp = (phys_ram_seg_t *)((long)kd->cpu_data + cpup->memsegoffset); 224 off = 0; 225 226 /* Translate (sparse) pfnum to (packed) dump offset */ 227 for (nmem = cpup->nmemseg; --nmem >= 0; mp++) { 228 if (mp->start <= pa && pa < mp->start + mp->size) 229 break; 230 off += mp->size; 231 } 232 if (nmem < 0) { 233 _kvm_err(kd, 0, "invalid address (%lx)", pa); 234 return (-1); 235 } 236 237 return (kd->dump_off + off + pa - mp->start); 238 } 239 240 /* 241 * Machine-dependent initialization for ALL open kvm descriptors, 242 * not just those for a kernel crash dump. Some architectures 243 * have to deal with these NOT being constants! (i.e. m68k) 244 */ 245 int 246 _kvm_mdopen(kd) 247 kvm_t *kd; 248 { 249 u_long max_uva; 250 extern struct ps_strings *__ps_strings; 251 252 max_uva = (u_long) (__ps_strings + 1); 253 kd->usrstack = max_uva; 254 kd->max_uva = max_uva; 255 kd->min_uva = 0; 256 257 return (0); 258 } 259