kvm_sparc64.c revision 1.14
1 /* $NetBSD: kvm_sparc64.c,v 1.14 2010/09/19 02:07:00 jym 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_sparc64.c,v 1.14 2010/09/19 02:07:00 jym 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/user.h> 53 #include <sys/proc.h> 54 #include <sys/stat.h> 55 #include <sys/core.h> 56 #include <sys/kcore.h> 57 #include <unistd.h> 58 #include <nlist.h> 59 #include <kvm.h> 60 61 #include <uvm/uvm_extern.h> 62 63 #include <machine/pmap.h> 64 #include <machine/kcore.h> 65 #include <machine/vmparam.h> 66 67 #include <limits.h> 68 #include <db.h> 69 70 #include "kvm_private.h" 71 72 void 73 _kvm_freevtop(kvm_t *kd) 74 { 75 if (kd->vmst != 0) { 76 _kvm_err(kd, kd->program, "_kvm_freevtop: internal error"); 77 kd->vmst = 0; 78 } 79 } 80 81 /* 82 * Prepare for translation of kernel virtual addresses into offsets 83 * into crash dump files. We use the MMU specific goop written at the 84 * front of the crash dump by pmap_dumpmmu(). 85 * 86 * We should read in and cache the ksegs here to speed up operations... 87 */ 88 int 89 _kvm_initvtop(kvm_t *kd) 90 { 91 kd->nbpg = 0x2000; 92 93 return (0); 94 } 95 96 /* 97 * Translate a kernel virtual address to a physical address using the 98 * mapping information in kd->vm. Returns the result in pa, and returns 99 * the number of bytes that are contiguously available from this 100 * physical address. This routine is used only for crash dumps. 101 */ 102 int 103 _kvm_kvatop(kvm_t *kd, u_long va, u_long *pa) 104 { 105 cpu_kcore_hdr_t *cpup = kd->cpu_data; 106 u_long kernbase = cpup->kernbase; 107 uint64_t *pseg, *pdir, *ptbl; 108 struct cpu_kcore_4mbseg *ktlb; 109 int64_t data; 110 int i; 111 112 if (va < kernbase) 113 goto lose; 114 115 /* Handle the wired 4MB TTEs and per-CPU mappings */ 116 if (cpup->memsegoffset > sizeof(cpu_kcore_hdr_t) && 117 cpup->newmagic == SPARC64_KCORE_NEWMAGIC) { 118 /* 119 * new format: we have a list of 4 MB mappings 120 */ 121 ktlb = (struct cpu_kcore_4mbseg *) 122 ((uintptr_t)kd->cpu_data + cpup->off4mbsegs); 123 for (i = 0; i < cpup->num4mbsegs; i++) { 124 uint64_t start = ktlb[i].va; 125 if (va < start || va >= start+PAGE_SIZE_4M) 126 continue; 127 *pa = ktlb[i].pa + va - start; 128 return (int)(start+PAGE_SIZE_4M - va); 129 } 130 131 if (cpup->numcpuinfos > 0) { 132 /* we have per-CPU mapping info */ 133 uint64_t start, base; 134 135 base = cpup->cpubase - 32*1024; 136 if (va >= base && va < (base + cpup->percpusz)) { 137 start = va - base; 138 *pa = cpup->cpusp 139 + cpup->thiscpu*cpup->percpusz 140 + start; 141 return cpup->percpusz - start; 142 } 143 } 144 } else { 145 /* 146 * old format: just a textbase/size and database/size 147 */ 148 if (va > cpup->ktextbase && va < 149 (cpup->ktextbase + cpup->ktextsz)) { 150 u_long vaddr; 151 152 vaddr = va - cpup->ktextbase; 153 *pa = cpup->ktextp + vaddr; 154 return (int)(cpup->ktextsz - vaddr); 155 } 156 if (va > cpup->kdatabase && va < 157 (cpup->kdatabase + cpup->kdatasz)) { 158 u_long vaddr; 159 160 vaddr = va - cpup->kdatabase; 161 *pa = cpup->kdatap + vaddr; 162 return (int)(cpup->kdatasz - vaddr); 163 } 164 } 165 166 /* 167 * Parse kernel page table. 168 */ 169 pseg = (uint64_t *)(u_long)cpup->segmapoffset; 170 if (_kvm_pread(kd, kd->pmfd, &pdir, sizeof(pdir), 171 _kvm_pa2off(kd, (u_long)&pseg[va_to_seg(va)])) 172 != sizeof(pdir)) { 173 _kvm_syserr(kd, 0, "could not read L1 PTE"); 174 goto lose; 175 } 176 177 if (!pdir) { 178 _kvm_err(kd, 0, "invalid L1 PTE"); 179 goto lose; 180 } 181 182 if (_kvm_pread(kd, kd->pmfd, &ptbl, sizeof(ptbl), 183 _kvm_pa2off(kd, (u_long)&pdir[va_to_dir(va)])) 184 != sizeof(ptbl)) { 185 _kvm_syserr(kd, 0, "could not read L2 PTE"); 186 goto lose; 187 } 188 189 if (!ptbl) { 190 _kvm_err(kd, 0, "invalid L2 PTE"); 191 goto lose; 192 } 193 194 if (_kvm_pread(kd, kd->pmfd, &data, sizeof(data), 195 _kvm_pa2off(kd, (u_long)&ptbl[va_to_pte(va)])) 196 != sizeof(data)) { 197 _kvm_syserr(kd, 0, "could not read TTE"); 198 goto lose; 199 } 200 201 if (data >= 0) { 202 _kvm_err(kd, 0, "invalid L2 TTE"); 203 goto lose; 204 } 205 206 /* 207 * Calculate page offsets and things. 208 * 209 * XXXX -- We could support multiple page sizes. 210 */ 211 va = va & (kd->nbpg - 1); 212 data &= TLB_PA_MASK; 213 *pa = data + va; 214 215 /* 216 * Parse and trnslate our TTE. 217 */ 218 219 return (int)(kd->nbpg - va); 220 221 lose: 222 *pa = (u_long)-1; 223 _kvm_err(kd, 0, "invalid address (%lx)", va); 224 return (0); 225 } 226 227 228 /* 229 * Translate a physical address to a file-offset in the crash dump. 230 */ 231 off_t 232 _kvm_pa2off(kvm_t *kd, u_long pa) 233 { 234 cpu_kcore_hdr_t *cpup = kd->cpu_data; 235 phys_ram_seg_t *mp; 236 off_t off; 237 int nmem; 238 239 /* 240 * Layout of CPU segment: 241 * cpu_kcore_hdr_t; 242 * [alignment] 243 * phys_ram_seg_t[cpup->nmemseg]; 244 */ 245 mp = (phys_ram_seg_t *)((long)kd->cpu_data + cpup->memsegoffset); 246 off = 0; 247 248 /* Translate (sparse) pfnum to (packed) dump offset */ 249 for (nmem = cpup->nmemseg; --nmem >= 0; mp++) { 250 if (mp->start <= pa && pa < mp->start + mp->size) 251 break; 252 off += mp->size; 253 } 254 if (nmem < 0) { 255 _kvm_err(kd, 0, "invalid address (%lx)", pa); 256 return (-1); 257 } 258 259 return (kd->dump_off + off + pa - mp->start); 260 } 261 262 /* 263 * Machine-dependent initialization for ALL open kvm descriptors, 264 * not just those for a kernel crash dump. Some architectures 265 * have to deal with these NOT being constants! (i.e. m68k) 266 */ 267 int 268 _kvm_mdopen(kvm_t *kd) 269 { 270 u_long max_uva; 271 extern struct ps_strings *__ps_strings; 272 273 max_uva = (u_long) (__ps_strings + 1); 274 kd->usrstack = max_uva; 275 kd->max_uva = max_uva; 276 kd->min_uva = 0; 277 278 return (0); 279 } 280
Indexes created Thu Sep 25 08:09:54 GMT 2025