1/* $NetBSD: kvm_sun3.c,v 1.14 2010/09/20 23:23:16 jym 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 39static char sccsid[] = "@(#)kvm_sparc.c 8.1 (Berkeley) 6/4/93"; 40#else 41__RCSID("$NetBSD: kvm_sun3.c,v 1.14 2010/09/20 23:23:16 jym Exp $"); 42#endif 43#endif /* LIBC_SCCS and not lint */ 44 45/* 46 * Sun3 machine dependent routines for kvm. 47 * 48 * Note: This file has to build on ALL m68k 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 66int _kvm_sun3_initvtop(kvm_t *); 67void _kvm_sun3_freevtop(kvm_t *); 68int _kvm_sun3_kvatop (kvm_t *, vaddr_t, paddr_t *); 69off_t _kvm_sun3_pa2off (kvm_t *, paddr_t); 70 71struct kvm_ops _kvm_ops_sun3 = { 72 _kvm_sun3_initvtop, 73 _kvm_sun3_freevtop, 74 _kvm_sun3_kvatop, 75 _kvm_sun3_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 256 /* kernel segmap entries */ 91#define NPAGSEG 16 /* pages per segment */ 92 93/* Finally, our local stuff... */ 94struct 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: sun3 MMU specific! 104 */ 105int 106_kvm_sun3_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 118void 119_kvm_sun3_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 */ 131int 132_kvm_sun3_kvatop(kvm_t *kd, vaddr_t va, paddr_t *pap) 133{ 134 cpu_kcore_hdr_t *h = kd->cpu_data; 135 struct sun3_kcore_hdr *s = &h->un._sun3; 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=%#"PRIxVADDR")", 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 */ 177off_t 178_kvm_sun3_pa2off(kvm_t *kd, paddr_t pa) 179{ 180 return(kd->dump_off + pa); 181} 182