1 /* $NetBSD: kvm_sparc64.c,v 1.17 2014/02/21 18:00:09 palle 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 1.17 2014/02/21 18:00:09 palle 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/proc.h> 53 #include <sys/stat.h> 54 #include <sys/core.h> 55 #include <sys/kcore.h> 56 #include <sys/types.h> 57 58 #include <unistd.h> 59 #include <nlist.h> 60 #include <kvm.h> 61 62 #include <uvm/uvm_extern.h> 63 64 #include <machine/pmap.h> 65 #include <machine/kcore.h> 66 #include <machine/vmparam.h> 67 #include <machine/param.h> 68 69 #include <limits.h> 70 #include <db.h> 71 72 #include "kvm_private.h" 73 74 void 75 _kvm_freevtop(kvm_t *kd) 76 { 77 if (kd->vmst != 0) { 78 _kvm_err(kd, kd->program, "_kvm_freevtop: internal error"); 79 kd->vmst = 0; 80 } 81 } 82 83 /* 84 * Prepare for translation of kernel virtual addresses into offsets 85 * into crash dump files. We use the MMU specific goop written at the 86 * front of the crash dump by pmap_dumpmmu(). 87 * 88 * We should read in and cache the ksegs here to speed up operations... 89 */ 90 int 91 _kvm_initvtop(kvm_t *kd) 92 { 93 kd->nbpg = 0x2000; 94 95 return (0); 96 } 97 98 /* 99 * Translate a kernel virtual address to a physical address using the 100 * mapping information in kd->vm. Returns the result in pa, and returns 101 * the number of bytes that are contiguously available from this 102 * physical address. This routine is used only for crash dumps. 103 */ 104 int 105 _kvm_kvatop(kvm_t *kd, vaddr_t va, paddr_t *pa) 106 { 107 cpu_kcore_hdr_t *cpup = kd->cpu_data; 108 u_long kernbase = cpup->kernbase; 109 uint64_t *pseg, *pdir, *ptbl; 110 struct cpu_kcore_4mbseg *ktlb; 111 int64_t data; 112 int i; 113 114 if (va < kernbase) 115 goto lose; 116 117 /* Handle the wired 4MB TTEs and per-CPU mappings */ 118 if (cpup->memsegoffset > sizeof(cpu_kcore_hdr_t) && 119 cpup->newmagic == SPARC64_KCORE_NEWMAGIC) { 120 /* 121 * new format: we have a list of 4 MB mappings 122 */ 123 ktlb = (struct cpu_kcore_4mbseg *) 124 ((uintptr_t)kd->cpu_data + cpup->off4mbsegs); 125 for (i = 0; i < cpup->num4mbsegs; i++) { 126 uint64_t start = ktlb[i].va; 127 if (va < start || va >= start+PAGE_SIZE_4M) 128 continue; 129 *pa = ktlb[i].pa + va - start; 130 return (int)(start+PAGE_SIZE_4M - va); 131 } 132 133 if (cpup->numcpuinfos > 0) { 134 /* we have per-CPU mapping info */ 135 uint64_t start, base; 136 137 base = cpup->cpubase - 32*1024; 138 if (va >= base && va < (base + cpup->percpusz)) { 139 start = va - base; 140 *pa = cpup->cpusp 141 + cpup->thiscpu*cpup->percpusz 142 + start; 143 return cpup->percpusz - start; 144 } 145 } 146 } else { 147 /* 148 * old format: just a textbase/size and database/size 149 */ 150 if (va > cpup->ktextbase && va < 151 (cpup->ktextbase + cpup->ktextsz)) { 152 u_long vaddr; 153 154 vaddr = va - cpup->ktextbase; 155 *pa = cpup->ktextp + vaddr; 156 return (int)(cpup->ktextsz - vaddr); 157 } 158 if (va > cpup->kdatabase && va < 159 (cpup->kdatabase + cpup->kdatasz)) { 160 u_long vaddr; 161 162 vaddr = va - cpup->kdatabase; 163 *pa = cpup->kdatap + vaddr; 164 return (int)(cpup->kdatasz - vaddr); 165 } 166 } 167 168 /* 169 * Parse kernel page table. 170 */ 171 pseg = (uint64_t *)(u_long)cpup->segmapoffset; 172 if (_kvm_pread(kd, kd->pmfd, &pdir, sizeof(pdir), 173 _kvm_pa2off(kd, (paddr_t)&pseg[va_to_seg(va)])) 174 != sizeof(pdir)) { 175 _kvm_syserr(kd, 0, "could not read L1 PTE"); 176 goto lose; 177 } 178 179 if (!pdir) { 180 _kvm_err(kd, 0, "invalid L1 PTE"); 181 goto lose; 182 } 183 184 if (_kvm_pread(kd, kd->pmfd, &ptbl, sizeof(ptbl), 185 _kvm_pa2off(kd, (paddr_t)&pdir[va_to_dir(va)])) 186 != sizeof(ptbl)) { 187 _kvm_syserr(kd, 0, "could not read L2 PTE"); 188 goto lose; 189 } 190 191 if (!ptbl) { 192 _kvm_err(kd, 0, "invalid L2 PTE"); 193 goto lose; 194 } 195 196 if (_kvm_pread(kd, kd->pmfd, &data, sizeof(data), 197 _kvm_pa2off(kd, (paddr_t)&ptbl[va_to_pte(va)])) 198 != sizeof(data)) { 199 _kvm_syserr(kd, 0, "could not read TTE"); 200 goto lose; 201 } 202 203 if (data >= 0) { 204 _kvm_err(kd, 0, "invalid L2 TTE"); 205 goto lose; 206 } 207 208 /* 209 * Calculate page offsets and things. 210 * 211 * XXXX -- We could support multiple page sizes. 212 */ 213 va = va & (kd->nbpg - 1); 214 data &= SUN4U_TLB_PA_MASK; /* XXX handle sun4u/sun4v */ 215 *pa = data + va; 216 217 /* 218 * Parse and trnslate our TTE. 219 */ 220 221 return (int)(kd->nbpg - va); 222 223 lose: 224 *pa = (u_long)-1; 225 _kvm_err(kd, 0, "invalid address (%#"PRIxVADDR")", va); 226 return (0); 227 } 228 229 230 /* 231 * Translate a physical address to a file-offset in the crash dump. 232 */ 233 off_t 234 _kvm_pa2off(kvm_t *kd, paddr_t pa) 235 { 236 cpu_kcore_hdr_t *cpup = kd->cpu_data; 237 phys_ram_seg_t *mp; 238 off_t off; 239 int nmem; 240 241 /* 242 * Layout of CPU segment: 243 * cpu_kcore_hdr_t; 244 * [alignment] 245 * phys_ram_seg_t[cpup->nmemseg]; 246 */ 247 mp = (phys_ram_seg_t *)((long)kd->cpu_data + cpup->memsegoffset); 248 off = 0; 249 250 /* Translate (sparse) pfnum to (packed) dump offset */ 251 for (nmem = cpup->nmemseg; --nmem >= 0; mp++) { 252 if (mp->start <= pa && pa < mp->start + mp->size) 253 break; 254 off += mp->size; 255 } 256 if (nmem < 0) { 257 _kvm_err(kd, 0, "invalid address (%#"PRIxPADDR")", pa); 258 return (-1); 259 } 260 261 return (kd->dump_off + off + pa - mp->start); 262 } 263 264 /* 265 * Machine-dependent initialization for ALL open kvm descriptors, 266 * not just those for a kernel crash dump. Some architectures 267 * have to deal with these NOT being constants! (i.e. m68k) 268 */ 269 int 270 _kvm_mdopen(kvm_t *kd) 271 { 272 u_long max_uva; 273 extern struct ps_strings *__ps_strings; 274 275 max_uva = (u_long) (__ps_strings + 1); 276 kd->usrstack = max_uva; 277 kd->max_uva = max_uva; 278 kd->min_uva = 0; 279 280 return (0); 281 } 282