kvm_sun3.c revision 1.8
1 /* $NetBSD: kvm_sun3.c,v 1.8 1997/10/12 11:04:18 briggs 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_sun3.c,v 1.8 1997/10/12 11:04:18 briggs Exp $"); 46 #endif 47 #endif /* LIBC_SCCS and not lint */ 48 49 /* 50 * Sun3 machine dependent routines for kvm. 51 * 52 * Note: This file has to build on ALL m68k machines, 53 * so do NOT include any <machine / *.h> files here. 54 */ 55 56 #include <sys/types.h> 57 #include <sys/kcore.h> 58 59 #include <unistd.h> 60 #include <limits.h> 61 #include <nlist.h> 62 #include <kvm.h> 63 #include <db.h> 64 65 #include <m68k/kcore.h> 66 67 #include "kvm_private.h" 68 #include "kvm_m68k.h" 69 70 int _kvm_sun3_initvtop __P((kvm_t *)); 71 void _kvm_sun3_freevtop __P((kvm_t *)); 72 int _kvm_sun3_kvatop __P((kvm_t *, u_long, u_long *)); 73 off_t _kvm_sun3_pa2off __P((kvm_t *, u_long)); 74 75 struct kvm_ops _kvm_ops_sun3 = { 76 _kvm_sun3_initvtop, 77 _kvm_sun3_freevtop, 78 _kvm_sun3_kvatop, 79 _kvm_sun3_pa2off }; 80 81 #define _kvm_pg_pa(v, s, pte) \ 82 (((pte) & (s)->pg_frame) << (v)->pgshift) 83 84 #define _kvm_va_segnum(s, x) \ 85 ((u_int)(x) >> (s)->segshift) 86 #define _kvm_pte_num_mask(v) \ 87 (0xf << (v)->pgshift) 88 #define _kvm_va_pte_num(v, va) \ 89 (((va) & _kvm_pte_num_mask((v))) >> (v)->pgshift) 90 91 /* 92 * XXX Re-define these here, no other place for them. 93 */ 94 #define NKSEG 256 /* kernel segmap entries */ 95 #define NPAGSEG 16 /* pages per segment */ 96 97 /* Finally, our local stuff... */ 98 struct private_vmstate { 99 /* Page Map Entry Group (PMEG) */ 100 int pmeg[NKSEG][NPAGSEG]; 101 }; 102 103 /* 104 * Prepare for translation of kernel virtual addresses into offsets 105 * into crash dump files. We use the MMU specific goop written at the 106 * beginning of a crash dump by dumpsys() 107 * Note: sun3 MMU specific! 108 */ 109 int 110 _kvm_sun3_initvtop(kd) 111 kvm_t *kd; 112 { 113 cpu_kcore_hdr_t *h = kd->cpu_data; 114 char *p; 115 116 p = kd->cpu_data; 117 p += (h->page_size - sizeof(kcore_seg_t)); 118 kd->vmst->private = p; 119 120 return (0); 121 } 122 123 void 124 _kvm_sun3_freevtop(kd) 125 kvm_t *kd; 126 { 127 /* This was set by pointer arithmetic, not allocation. */ 128 kd->vmst->private = (void*)0; 129 } 130 131 /* 132 * Translate a kernel virtual address to a physical address using the 133 * mapping information in kd->vm. Returns the result in pa, and returns 134 * the number of bytes that are contiguously available from this 135 * physical address. This routine is used only for crashdumps. 136 */ 137 int 138 _kvm_sun3_kvatop(kd, va, pap) 139 kvm_t *kd; 140 u_long va; 141 u_long *pap; 142 { 143 cpu_kcore_hdr_t *h = kd->cpu_data; 144 struct sun3_kcore_hdr *s = &h->un._sun3; 145 struct vmstate *v = kd->vmst; 146 struct private_vmstate *pv = v->private; 147 int pte, offset; 148 u_int segnum, sme, ptenum; 149 u_long pa; 150 151 if (ISALIVE(kd)) { 152 _kvm_err(kd, 0, "vatop called in live kernel!"); 153 return(0); 154 } 155 156 if (va < h->kernbase) { 157 _kvm_err(kd, 0, "not a kernel address"); 158 return(0); 159 } 160 161 /* 162 * Get the segmap entry (sme) from the kernel segmap. 163 * Note: only have segmap entries from KERNBASE to end. 164 */ 165 segnum = _kvm_va_segnum(s, va - h->kernbase); 166 ptenum = _kvm_va_pte_num(v, va); 167 offset = va & v->pgofset; 168 169 /* The segmap entry selects a PMEG. */ 170 sme = s->ksegmap[segnum]; 171 pte = pv->pmeg[sme][ptenum]; 172 173 if ((pte & (s)->pg_valid) == 0) { 174 _kvm_err(kd, 0, "page not valid (VA=0x%x)", va); 175 return (0); 176 } 177 pa = _kvm_pg_pa(v, s, pte) + offset; 178 179 *pap = pa; 180 return (h->page_size - offset); 181 } 182 183 /* 184 * Translate a physical address to a file-offset in the crash-dump. 185 */ 186 off_t 187 _kvm_sun3_pa2off(kd, pa) 188 kvm_t *kd; 189 u_long pa; 190 { 191 return(kd->dump_off + pa); 192 } 193
Indexes created Thu Sep 25 08:09:54 GMT 2025