1 /* $NetBSD: kvm_sun3x.c,v 1.12 2011/09/14 12:37:55 christos 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #if defined(LIBC_SCCS) && !defined(lint) 34 #if 0 35 static char sccsid[] = "@(#)kvm_sparc.c 8.1 (Berkeley) 6/4/93"; 36 #else 37 __RCSID("$NetBSD: kvm_sun3x.c,v 1.12 2011/09/14 12:37:55 christos Exp $"); 38 #endif 39 #endif /* LIBC_SCCS and not lint */ 40 41 /* 42 * Sun3x machine dependent routines for kvm. 43 * 44 * Note: This file has to build on ALL m68k machines, 45 * so do NOT include any <machine / *.h> files here. 46 */ 47 #include <sys/param.h> 48 #include <sys/types.h> 49 #include <sys/kcore.h> 50 51 #include <unistd.h> 52 #include <limits.h> 53 #include <nlist.h> 54 #include <kvm.h> 55 #include <db.h> 56 57 #include <m68k/kcore.h> 58 59 #include "kvm_private.h" 60 #include "kvm_m68k.h" 61 62 int _kvm_sun3x_initvtop(kvm_t *); 63 void _kvm_sun3x_freevtop(kvm_t *); 64 int _kvm_sun3x_kvatop (kvm_t *, vaddr_t, paddr_t *); 65 off_t _kvm_sun3x_pa2off (kvm_t *, paddr_t); 66 67 struct kvm_ops _kvm_ops_sun3x = { 68 _kvm_sun3x_initvtop, 69 _kvm_sun3x_freevtop, 70 _kvm_sun3x_kvatop, 71 _kvm_sun3x_pa2off }; 72 73 #define _kvm_kvas_size(h) \ 74 (-((h)->kernbase)) 75 #define _kvm_nkptes(h, v) \ 76 (_kvm_kvas_size((h)) >> (v)->pgshift) 77 #define _kvm_pg_pa(pte, h) \ 78 ((pte) & (h)->pg_frame) 79 80 /* 81 * Prepare for translation of kernel virtual addresses into offsets 82 * into crash dump files. Nothing to do here. 83 */ 84 int 85 _kvm_sun3x_initvtop(kvm_t *kd) 86 { 87 return 0; 88 } 89 90 void 91 _kvm_sun3x_freevtop(kvm_t *kd) 92 { 93 } 94 95 /* 96 * Translate a kernel virtual address to a physical address using the 97 * mapping information in kd->vm. Returns the result in pa, and returns 98 * the number of bytes that are contiguously available from this 99 * physical address. This routine is used only for crash dumps. 100 */ 101 int 102 _kvm_sun3x_kvatop(kvm_t *kd, vaddr_t va, paddr_t *pap) 103 { 104 cpu_kcore_hdr_t *h = kd->cpu_data; 105 struct sun3x_kcore_hdr *s = &h->un._sun3x; 106 struct vmstate *v = kd->vmst; 107 int idx, len, offset, pte; 108 u_long pteva, pa; 109 110 if (ISALIVE(kd)) { 111 _kvm_err(kd, 0, "vatop called in live kernel!"); 112 return(0); 113 } 114 115 if (va < h->kernbase) { 116 _kvm_err(kd, 0, "not a kernel address"); 117 return(0); 118 } 119 120 /* 121 * If this VA is in the contiguous range, short-cut. 122 * Note that this ends our recursion when we call 123 * kvm_read to access the kernel page table, which 124 * is guaranteed to be in the contiguous range. 125 */ 126 if (va < s->contig_end) { 127 len = s->contig_end - va; 128 pa = va - h->kernbase; 129 goto done; 130 } 131 132 /* 133 * The KVA is beyond the contiguous range, so we must 134 * read the PTE for this KVA from the page table. 135 */ 136 idx = ((va - h->kernbase) >> v->pgshift); 137 pteva = s->kernCbase + (idx * 4); 138 if (kvm_read(kd, pteva, &pte, 4) != 4) { 139 _kvm_err(kd, 0, "can not read PTE!"); 140 return (0); 141 } 142 if ((pte & s->pg_valid) == 0) { 143 _kvm_err(kd, 0, "page not valid (VA=0x%lx)", va); 144 return (0); 145 } 146 offset = va & v->pgofset; 147 len = (h->page_size - offset); 148 pa = _kvm_pg_pa(pte, s) + offset; 149 150 done: 151 *pap = pa; 152 return (len); 153 } 154 155 /* 156 * Translate a physical address to a file-offset in the crash dump. 157 */ 158 off_t 159 _kvm_sun3x_pa2off(kvm_t *kd, paddr_t pa) 160 { 161 off_t off; 162 phys_ram_seg_t *rsp; 163 cpu_kcore_hdr_t *h = kd->cpu_data; 164 struct sun3x_kcore_hdr *s = &h->un._sun3x; 165 166 off = 0; 167 for (rsp = s->ram_segs; rsp->size; rsp++) { 168 if (pa >= rsp->start && pa < rsp->start + rsp->size) { 169 pa -= rsp->start; 170 break; 171 } 172 off += rsp->size; 173 } 174 return (kd->dump_off + off + pa); 175 } 176 177