1 /* $NetBSD: kvm_sun2.c,v 1.6 2011/09/14 12:37:55 christos 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. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #if defined(LIBC_SCCS) && !defined(lint) 38 #if 0 39 static char sccsid[] = "@(#)kvm_sparc.c 8.1 (Berkeley) 6/4/93"; 40 #else 41 __RCSID("$NetBSD: kvm_sun2.c,v 1.6 2011/09/14 12:37:55 christos Exp $"); 42 #endif 43 #endif /* LIBC_SCCS and not lint */ 44 45 /* 46 * Sun2 machine dependent routines for kvm. 47 * 48 * Note: This file has to build on ALL m68000 machines, 49 * so do NOT include any <machine / *.h> files here. 50 */ 51 #include <sys/param.h> 52 #include <sys/types.h> 53 #include <sys/kcore.h> 54 55 #include <unistd.h> 56 #include <limits.h> 57 #include <nlist.h> 58 #include <kvm.h> 59 #include <db.h> 60 61 #include <m68k/kcore.h> 62 63 #include "kvm_private.h" 64 #include "kvm_m68k.h" 65 66 int _kvm_sun2_initvtop(kvm_t *); 67 void _kvm_sun2_freevtop(kvm_t *); 68 int _kvm_sun2_kvatop (kvm_t *, vaddr_t, paddr_t *); 69 off_t _kvm_sun2_pa2off (kvm_t *, paddr_t); 70 71 struct kvm_ops _kvm_ops_sun2 = { 72 _kvm_sun2_initvtop, 73 _kvm_sun2_freevtop, 74 _kvm_sun2_kvatop, 75 _kvm_sun2_pa2off }; 76 77 #define _kvm_pg_pa(v, s, pte) \ 78 (((pte) & (s)->pg_frame) << (v)->pgshift) 79 80 #define _kvm_va_segnum(s, x) \ 81 ((u_int)(x) >> (s)->segshift) 82 #define _kvm_pte_num_mask(v) \ 83 (0xf << (v)->pgshift) 84 #define _kvm_va_pte_num(v, va) \ 85 (((va) & _kvm_pte_num_mask((v))) >> (v)->pgshift) 86 87 /* 88 * XXX Re-define these here, no other place for them. 89 */ 90 #define NKSEG 512 /* kernel segmap entries */ 91 #define NPAGSEG 16 /* pages per segment */ 92 93 /* Finally, our local stuff... */ 94 struct private_vmstate { 95 /* Page Map Entry Group (PMEG) */ 96 int pmeg[NKSEG][NPAGSEG]; 97 }; 98 99 /* 100 * Prepare for translation of kernel virtual addresses into offsets 101 * into crash dump files. We use the MMU specific goop written at the 102 * beginning of a crash dump by dumpsys() 103 * Note: sun2 MMU specific! 104 */ 105 int 106 _kvm_sun2_initvtop(kvm_t *kd) 107 { 108 cpu_kcore_hdr_t *h = kd->cpu_data; 109 char *p; 110 111 p = kd->cpu_data; 112 p += (h->page_size - sizeof(kcore_seg_t)); 113 kd->vmst->private = p; 114 115 return (0); 116 } 117 118 void 119 _kvm_sun2_freevtop(kvm_t *kd) 120 { 121 /* This was set by pointer arithmetic, not allocation. */ 122 kd->vmst->private = (void*)0; 123 } 124 125 /* 126 * Translate a kernel virtual address to a physical address using the 127 * mapping information in kd->vm. Returns the result in pa, and returns 128 * the number of bytes that are contiguously available from this 129 * physical address. This routine is used only for crash dumps. 130 */ 131 int 132 _kvm_sun2_kvatop(kvm_t *kd, vaddr_t va, paddr_t *pap) 133 { 134 cpu_kcore_hdr_t *h = kd->cpu_data; 135 struct sun2_kcore_hdr *s = &h->un._sun2; 136 struct vmstate *v = kd->vmst; 137 struct private_vmstate *pv = v->private; 138 int pte, offset; 139 u_int segnum, sme, ptenum; 140 paddr_t pa; 141 142 if (ISALIVE(kd)) { 143 _kvm_err(kd, 0, "vatop called in live kernel!"); 144 return(0); 145 } 146 147 if (va < h->kernbase) { 148 _kvm_err(kd, 0, "not a kernel address"); 149 return(0); 150 } 151 152 /* 153 * Get the segmap entry (sme) from the kernel segmap. 154 * Note: only have segmap entries from KERNBASE to end. 155 */ 156 segnum = _kvm_va_segnum(s, va - h->kernbase); 157 ptenum = _kvm_va_pte_num(v, va); 158 offset = va & v->pgofset; 159 160 /* The segmap entry selects a PMEG. */ 161 sme = s->ksegmap[segnum]; 162 pte = pv->pmeg[sme][ptenum]; 163 164 if ((pte & (s)->pg_valid) == 0) { 165 _kvm_err(kd, 0, "page not valid (VA=0x%lx)", va); 166 return (0); 167 } 168 pa = _kvm_pg_pa(v, s, pte) + offset; 169 170 *pap = pa; 171 return (h->page_size - offset); 172 } 173 174 /* 175 * Translate a physical address to a file-offset in the crash dump. 176 */ 177 off_t 178 _kvm_sun2_pa2off(kvm_t *kd, paddr_t pa) 179 { 180 return(kd->dump_off + pa); 181 } 182