1 /* $NetBSD: kvm_sparc64.c,v 1.4 2000/06/29 06:34:26 mrg 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 1.4 2000/06/29 06:34:26 mrg 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/kcore.h> 68 69 #include <limits.h> 70 #include <db.h> 71 72 #include "kvm_private.h" 73 74 int _kvm_kvatop __P((kvm_t *, u_long, u_long *)); 75 76 void 77 _kvm_freevtop(kd) 78 kvm_t *kd; 79 { 80 if (kd->vmst != 0) { 81 _kvm_err(kd, kd->program, "_kvm_freevtop: internal error"); 82 kd->vmst = 0; 83 } 84 } 85 86 /* 87 * Prepare for translation of kernel virtual addresses into offsets 88 * into crash dump files. We use the MMU specific goop written at the 89 * front of the crash dump by pmap_dumpmmu(). 90 */ 91 int 92 _kvm_initvtop(kd) 93 kvm_t *kd; 94 { 95 kd->nbpg = 8196; 96 return (0); 97 } 98 99 /* 100 * Translate a kernel virtual address to a physical address using the 101 * mapping information in kd->vm. Returns the result in pa, and returns 102 * the number of bytes that are contiguously available from this 103 * physical address. This routine is used only for crashdumps. 104 */ 105 int 106 _kvm_kvatop(kd, va, pa) 107 kvm_t *kd; 108 u_long va; 109 u_long *pa; 110 { 111 cpu_kcore_hdr_t *cpup = kd->cpu_data; 112 u_long kernbase = cpup->kernbase; 113 114 if (va < kernbase) 115 goto err; 116 117 /* Handle the wired 4MB TTE */ 118 if (va > cpup->kernbase && va < cpup->kernbase + 4*1024*1024) { 119 u_long vaddr; 120 121 vaddr = va - cpup->kernbase; 122 *pa = cpup->kphys + va; 123 return (4*1024*1024 - va); 124 } 125 #if 0 126 /* 127 * Layout of CPU segment: 128 * cpu_kcore_hdr_t; 129 * [alignment] 130 * phys_ram_seg_t[cpup->nmemseg]; 131 * segmap[cpup->nsegmap]; 132 * ptes[cpup->npmegs]; 133 */ 134 segmaps = (struct segmap *)((long)kd->cpu_data + cpup->segmapoffset); 135 ptes = (int *)((int)kd->cpu_data + cpup->pmegoffset); 136 nkreg = ((int)((-(unsigned)kernbase) / NBPRG)); 137 nureg = 256 - nkreg; 138 139 vr = VA_VREG(va); 140 vs = VA_VSEG(va); 141 142 sp = &segmaps[(vr-nureg)*NSEGRG + vs]; 143 if (sp->sg_npte == 0) 144 goto err; 145 if (sp->sg_pmeg == cpup->npmeg - 1) /* =seginval */ 146 goto err; 147 pte = ptes[sp->sg_pmeg * nptesg + VA_VPG(va)]; 148 if ((pte & PG_V) != 0) { 149 long p, off = VA_OFF(va); 150 151 p = (pte & PG_PFNUM) << pgshift; 152 *pa = p + off; 153 return (kd->nbpg - off); 154 } 155 #endif 156 err: 157 _kvm_err(kd, 0, "invalid address (%x)", va); 158 return (0); 159 } 160 161 162 /* 163 * Translate a physical address to a file-offset in the crash-dump. 164 */ 165 off_t 166 _kvm_pa2off(kd, pa) 167 kvm_t *kd; 168 u_long pa; 169 { 170 cpu_kcore_hdr_t *cpup = kd->cpu_data; 171 phys_ram_seg_t *mp; 172 off_t off; 173 int nmem; 174 175 /* 176 * Layout of CPU segment: 177 * cpu_kcore_hdr_t; 178 * [alignment] 179 * phys_ram_seg_t[cpup->nmemseg]; 180 */ 181 mp = (phys_ram_seg_t *)((long)kd->cpu_data + cpup->memsegoffset); 182 off = 0; 183 184 /* Translate (sparse) pfnum to (packed) dump offset */ 185 for (nmem = cpup->nmemseg; --nmem >= 0; mp++) { 186 if (mp->start <= pa && pa < mp->start + mp->size) 187 break; 188 off += mp->size; 189 } 190 if (nmem < 0) { 191 _kvm_err(kd, 0, "invalid address (%x)", pa); 192 return (-1); 193 } 194 195 return (kd->dump_off + off + pa - mp->start); 196 } 197 198 /* 199 * Machine-dependent initialization for ALL open kvm descriptors, 200 * not just those for a kernel crash dump. Some architectures 201 * have to deal with these NOT being constants! (i.e. m68k) 202 */ 203 int 204 _kvm_mdopen(kd) 205 kvm_t *kd; 206 { 207 u_long max_uva; 208 extern struct ps_strings *__ps_strings; 209 210 max_uva = (u_long) (__ps_strings + 1); 211 kd->usrstack = max_uva; 212 kd->max_uva = max_uva; 213 kd->min_uva = 0; 214 215 return (0); 216 } 217