kvm_sun3x.c revision 1.3
1 /* $NetBSD: kvm_sun3x.c,v 1.3 1997/07/17 22:42:00 gwr Exp $ */ 2 3 /*- 4 * Copyright (c) 1997 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Gordon W. Ross. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #if defined(LIBC_SCCS) && !defined(lint) 40 #if 0 41 static char sccsid[] = "@(#)kvm_sparc.c 8.1 (Berkeley) 6/4/93"; 42 #else 43 static char *rcsid = "$NetBSD: kvm_sun3x.c,v 1.3 1997/07/17 22:42:00 gwr Exp $"; 44 #endif 45 #endif /* LIBC_SCCS and not lint */ 46 47 /* 48 * Sun3x machine dependent routines for kvm. 49 * 50 * Note: This file has to build on ALL m68k machines, 51 * so do NOT include any <machine/*.h> files here. 52 */ 53 54 #include <sys/types.h> 55 #include <sys/kcore.h> 56 57 #include <unistd.h> 58 #include <limits.h> 59 #include <nlist.h> 60 #include <kvm.h> 61 #include <db.h> 62 63 #include <m68k/kcore.h> 64 65 #include "kvm_private.h" 66 #include "kvm_m68k.h" 67 68 int _kvm_sun3x_initvtop __P((kvm_t *)); 69 void _kvm_sun3x_freevtop __P((kvm_t *)); 70 int _kvm_sun3x_kvatop __P((kvm_t *, u_long, u_long *)); 71 off_t _kvm_sun3x_pa2off __P((kvm_t *, u_long)); 72 73 struct kvm_ops _kvm_ops_sun3x = { 74 _kvm_sun3x_initvtop, 75 _kvm_sun3x_freevtop, 76 _kvm_sun3x_kvatop, 77 _kvm_sun3x_pa2off }; 78 79 #define _kvm_kvas_size(h) \ 80 (-((h)->kernbase)) 81 #define _kvm_nkptes(h, v) \ 82 (_kvm_kvas_size((h)) >> (v)->pgshift) 83 #define _kvm_pg_pa(pte, h) \ 84 ((pte) & (h)->pg_frame) 85 86 /* 87 * Prepare for translation of kernel virtual addresses into offsets 88 * into crash dump files. Nothing to do here. 89 */ 90 int 91 _kvm_sun3x_initvtop(kd) 92 kvm_t *kd; 93 { 94 return (0); 95 } 96 97 void 98 _kvm_sun3x_freevtop(kd) 99 kvm_t *kd; 100 { 101 } 102 103 /* 104 * Translate a kernel virtual address to a physical address using the 105 * mapping information in kd->vm. Returns the result in pa, and returns 106 * the number of bytes that are contiguously available from this 107 * physical address. This routine is used only for crashdumps. 108 */ 109 int 110 _kvm_sun3x_kvatop(kd, va, pap) 111 kvm_t *kd; 112 u_long va; 113 u_long *pap; 114 { 115 cpu_kcore_hdr_t *h = kd->cpu_data; 116 struct sun3x_kcore_hdr *s = &h->un._sun3x; 117 struct vmstate *v = kd->vmst; 118 int idx, len, offset, pte; 119 u_long pteva, pa; 120 121 if (ISALIVE(kd)) { 122 _kvm_err(kd, 0, "vatop called in live kernel!"); 123 return(0); 124 } 125 126 if (va < h->kernbase) { 127 _kvm_err(kd, 0, "not a kernel address"); 128 return(0); 129 } 130 131 /* 132 * If this VA is in the contiguous range, short-cut. 133 * Note that this ends our recursion when we call 134 * kvm_read to access the kernel page table, which 135 * is guaranteed to be in the contiguous range. 136 */ 137 if (va < s->contig_end) { 138 len = s->contig_end - va; 139 pa = va - h->kernbase; 140 goto done; 141 } 142 143 /* 144 * The KVA is beyond the contiguous range, so we must 145 * read the PTE for this KVA from the page table. 146 */ 147 idx = ((va - h->kernbase) >> v->pgshift); 148 pteva = s->kernCbase + (idx * 4); 149 if (kvm_read(kd, pteva, &pte, 4) != 4) { 150 _kvm_err(kd, 0, "can not read PTE!"); 151 return (0); 152 } 153 if ((pte & s->pg_valid) == 0) { 154 _kvm_err(kd, 0, "page not valid (VA=0x%x)", va); 155 return (0); 156 } 157 offset = va & v->pgofset; 158 len = (h->page_size - offset); 159 pa = _kvm_pg_pa(pte, s) + offset; 160 161 done: 162 *pap = pa; 163 return (len); 164 } 165 166 /* 167 * Translate a physical address to a file-offset in the crash-dump. 168 */ 169 off_t 170 _kvm_sun3x_pa2off(kd, pa) 171 kvm_t *kd; 172 u_long pa; 173 { 174 off_t off; 175 phys_ram_seg_t *rsp; 176 cpu_kcore_hdr_t *h = kd->cpu_data; 177 struct sun3x_kcore_hdr *s = &h->un._sun3x; 178 179 off = 0; 180 for (rsp = s->ram_segs; rsp->size; rsp++) { 181 if (pa >= rsp->start && pa < rsp->start + rsp->size) { 182 pa -= rsp->start; 183 break; 184 } 185 off += rsp->size; 186 } 187 return (kd->dump_off + off + pa); 188 } 189 190
Indexes created Wed Sep 24 05:09:52 GMT 2025