kvm_sun3x.c revision 1.8
1 /* $NetBSD: kvm_sun3x.c,v 1.8 2003/05/16 10:24:56 wiz 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 #include <sys/cdefs.h> 40 #if defined(LIBC_SCCS) && !defined(lint) 41 #if 0 42 static char sccsid[] = "@(#)kvm_sparc.c 8.1 (Berkeley) 6/4/93"; 43 #else 44 __RCSID("$NetBSD: kvm_sun3x.c,v 1.8 2003/05/16 10:24:56 wiz Exp $"); 45 #endif 46 #endif /* LIBC_SCCS and not lint */ 47 48 /* 49 * Sun3x machine dependent routines for kvm. 50 * 51 * Note: This file has to build on ALL m68k machines, 52 * so do NOT include any <machine / *.h> files here. 53 */ 54 55 #include <sys/types.h> 56 #include <sys/kcore.h> 57 58 #include <unistd.h> 59 #include <limits.h> 60 #include <nlist.h> 61 #include <kvm.h> 62 #include <db.h> 63 64 #include <m68k/kcore.h> 65 66 #include "kvm_private.h" 67 #include "kvm_m68k.h" 68 69 int _kvm_sun3x_initvtop __P((kvm_t *)); 70 void _kvm_sun3x_freevtop __P((kvm_t *)); 71 int _kvm_sun3x_kvatop __P((kvm_t *, u_long, u_long *)); 72 off_t _kvm_sun3x_pa2off __P((kvm_t *, u_long)); 73 74 struct kvm_ops _kvm_ops_sun3x = { 75 _kvm_sun3x_initvtop, 76 _kvm_sun3x_freevtop, 77 _kvm_sun3x_kvatop, 78 _kvm_sun3x_pa2off }; 79 80 #define _kvm_kvas_size(h) \ 81 (-((h)->kernbase)) 82 #define _kvm_nkptes(h, v) \ 83 (_kvm_kvas_size((h)) >> (v)->pgshift) 84 #define _kvm_pg_pa(pte, h) \ 85 ((pte) & (h)->pg_frame) 86 87 /* 88 * Prepare for translation of kernel virtual addresses into offsets 89 * into crash dump files. Nothing to do here. 90 */ 91 int 92 _kvm_sun3x_initvtop(kd) 93 kvm_t *kd; 94 { 95 return (0); 96 } 97 98 void 99 _kvm_sun3x_freevtop(kd) 100 kvm_t *kd; 101 { 102 } 103 104 /* 105 * Translate a kernel virtual address to a physical address using the 106 * mapping information in kd->vm. Returns the result in pa, and returns 107 * the number of bytes that are contiguously available from this 108 * physical address. This routine is used only for crash dumps. 109 */ 110 int 111 _kvm_sun3x_kvatop(kd, va, pap) 112 kvm_t *kd; 113 u_long va; 114 u_long *pap; 115 { 116 cpu_kcore_hdr_t *h = kd->cpu_data; 117 struct sun3x_kcore_hdr *s = &h->un._sun3x; 118 struct vmstate *v = kd->vmst; 119 int idx, len, offset, pte; 120 u_long pteva, pa; 121 122 if (ISALIVE(kd)) { 123 _kvm_err(kd, 0, "vatop called in live kernel!"); 124 return(0); 125 } 126 127 if (va < h->kernbase) { 128 _kvm_err(kd, 0, "not a kernel address"); 129 return(0); 130 } 131 132 /* 133 * If this VA is in the contiguous range, short-cut. 134 * Note that this ends our recursion when we call 135 * kvm_read to access the kernel page table, which 136 * is guaranteed to be in the contiguous range. 137 */ 138 if (va < s->contig_end) { 139 len = s->contig_end - va; 140 pa = va - h->kernbase; 141 goto done; 142 } 143 144 /* 145 * The KVA is beyond the contiguous range, so we must 146 * read the PTE for this KVA from the page table. 147 */ 148 idx = ((va - h->kernbase) >> v->pgshift); 149 pteva = s->kernCbase + (idx * 4); 150 if (kvm_read(kd, pteva, &pte, 4) != 4) { 151 _kvm_err(kd, 0, "can not read PTE!"); 152 return (0); 153 } 154 if ((pte & s->pg_valid) == 0) { 155 _kvm_err(kd, 0, "page not valid (VA=0x%lx)", va); 156 return (0); 157 } 158 offset = va & v->pgofset; 159 len = (h->page_size - offset); 160 pa = _kvm_pg_pa(pte, s) + offset; 161 162 done: 163 *pap = pa; 164 return (len); 165 } 166 167 /* 168 * Translate a physical address to a file-offset in the crash dump. 169 */ 170 off_t 171 _kvm_sun3x_pa2off(kd, pa) 172 kvm_t *kd; 173 u_long pa; 174 { 175 off_t off; 176 phys_ram_seg_t *rsp; 177 cpu_kcore_hdr_t *h = kd->cpu_data; 178 struct sun3x_kcore_hdr *s = &h->un._sun3x; 179 180 off = 0; 181 for (rsp = s->ram_segs; rsp->size; rsp++) { 182 if (pa >= rsp->start && pa < rsp->start + rsp->size) { 183 pa -= rsp->start; 184 break; 185 } 186 off += rsp->size; 187 } 188 return (kd->dump_off + off + pa); 189 } 190 191
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