150534Smpp/* $NetBSD: kvm_sun2.c,v 1.5 2010/09/20 23:23:16 jym Exp $ */ 250534Smpp 3322091Strasz/*- 431567Ssef * Copyright (c) 1992, 1993 579535Sru * The Regents of the University of California. All rights reserved. 631567Ssef * 732275Scharnier * This code is derived from software developed by the Computer Systems 831567Ssef * Engineering group at Lawrence Berkeley Laboratory under DARPA contract 932275Scharnier * BG 91-66 and contributed to Berkeley. 1068963Sru * 11295930Sjhb * Redistribution and use in source and binary forms, with or without 1231567Ssef * modification, are permitted provided that the following conditions 13153963Sbrian * are met: 1432275Scharnier * 1. Redistributions of source code must retain the above copyright 1568963Sru * notice, this list of conditions and the following disclaimer. 16295930Sjhb * 2. Redistributions in binary form must reproduce the above copyright 1732275Scharnier * notice, this list of conditions and the following disclaimer in the 18153963Sbrian * documentation and/or other materials provided with the distribution. 19165100Sru * 3. Neither the name of the University nor the names of its contributors 2031567Ssef * may be used to endorse or promote products derived from this software 2195124Scharnier * without specific prior written permission. 2295124Scharnier * 2395124Scharnier * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2431567Ssef * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2531567Ssef * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26168569Sdelphij * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2731567Ssef * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2831567Ssef * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2932275Scharnier * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30101283Smdodd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31148580Skeramida * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32107276Sru * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33107276Sru * SUCH DAMAGE. 34107276Sru */ 35295930Sjhb 36295930Sjhb#include <sys/cdefs.h> 37295930Sjhb#if defined(LIBC_SCCS) && !defined(lint) 38295930Sjhb#if 0 39101289Smdoddstatic char sccsid[] = "@(#)kvm_sparc.c 8.1 (Berkeley) 6/4/93"; 40107276Sru#else 41107276Sru__RCSID("$NetBSD: kvm_sun2.c,v 1.5 2010/09/20 23:23:16 jym Exp $"); 42107276Sru#endif 43192025Sdds#endif /* LIBC_SCCS and not lint */ 44289080Sbdrewery 45192025Sdds/* 46192025Sdds * Sun2 machine dependent routines for kvm. 47192025Sdds * 48192025Sdds * Note: This file has to build on ALL m68000 machines, 49101289Smdodd * so do NOT include any <machine / *.h> files here. 50107276Sru */ 51107276Sru#include <sys/param.h> 52107276Sru#include <sys/types.h> 53101285Smdodd#include <sys/kcore.h> 54101285Smdodd 55101285Smdodd#include <unistd.h> 56101285Smdodd#include <limits.h> 57101285Smdodd#include <nlist.h> 58101285Smdodd#include <kvm.h> 59295930Sjhb#include <db.h> 60295930Sjhb 6131567Ssef#include <m68k/kcore.h> 6231567Ssef 6331567Ssef#include "kvm_private.h" 6432275Scharnier#include "kvm_m68k.h" 6531567Ssef 6632275Scharnierint _kvm_sun2_initvtop(kvm_t *); 6732275Scharniervoid _kvm_sun2_freevtop(kvm_t *); 6832275Scharnierint _kvm_sun2_kvatop (kvm_t *, vaddr_t, paddr_t *); 6932275Scharnieroff_t _kvm_sun2_pa2off (kvm_t *, paddr_t); 70153963Sbrian 71153963Sbrianstruct kvm_ops _kvm_ops_sun2 = { 72153963Sbrian _kvm_sun2_initvtop, 73153963Sbrian _kvm_sun2_freevtop, 74153963Sbrian _kvm_sun2_kvatop, 75162792Sru _kvm_sun2_pa2off }; 76153963Sbrian 77153963Sbrian#define _kvm_pg_pa(v, s, pte) \ 78153963Sbrian (((pte) & (s)->pg_frame) << (v)->pgshift) 79153963Sbrian 8032275Scharnier#define _kvm_va_segnum(s, x) \ 8179755Sdd ((u_int)(x) >> (s)->segshift) 8231567Ssef#define _kvm_pte_num_mask(v) \ 8331567Ssef (0xf << (v)->pgshift) 84165100Sru#define _kvm_va_pte_num(v, va) \ 8531567Ssef (((va) & _kvm_pte_num_mask((v))) >> (v)->pgshift) 8631567Ssef 8731567Ssef/* 8831567Ssef * XXX Re-define these here, no other place for them. 8931567Ssef */ 9031567Ssef#define NKSEG 512 /* kernel segmap entries */ 9131567Ssef#define NPAGSEG 16 /* pages per segment */ 9231567Ssef 9370197Sru/* Finally, our local stuff... */ 9431567Ssefstruct private_vmstate { 95322090Strasz /* Page Map Entry Group (PMEG) */ 9631567Ssef int pmeg[NKSEG][NPAGSEG]; 97322090Strasz}; 98322090Strasz 9931567Ssef/* 100322090Strasz * Prepare for translation of kernel virtual addresses into offsets 101322090Strasz * into crash dump files. We use the MMU specific goop written at the 102187607Strhodes * beginning of a crash dump by dumpsys() 10331567Ssef * Note: sun2 MMU specific! 104322091Strasz */ 10532275Scharnierint 10631567Ssef_kvm_sun2_initvtop(kvm_t *kd) 107288957Sbdrewery{ 108288957Sbdrewery cpu_kcore_hdr_t *h = kd->cpu_data; 10931567Ssef char *p; 11031567Ssef 11132275Scharnier p = kd->cpu_data; 11232275Scharnier p += (h->page_size - sizeof(kcore_seg_t)); 11332275Scharnier kd->vmst->private = p; 11432275Scharnier 11556412Smpp return (0); 11656412Smpp} 11731567Ssef 118void 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 */ 131int 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 */ 177off_t 178_kvm_sun2_pa2off(kvm_t *kd, paddr_t pa) 179{ 180 return(kd->dump_off + pa); 181} 182