1 /* $FreeBSD: src/lib/libkvm/kvm_alpha.c,v 1.4 1999/12/27 07:14:56 peter Exp $ */
2 /* $DragonFly: src/lib/libkvm/Attic/kvm_alpha.c,v 1.2 2003/06/17 04:26:49 dillon Exp $ */
3 /* $NetBSD: kvm_alpha.c,v 1.7.2.1 1997/11/02 20:34:26 mellon Exp $ */
6 * Copyright (c) 1994, 1995 Carnegie-Mellon University.
9 * Author: Chris G. Demetriou
11 * Permission to use, copy, modify and distribute this software and
12 * its documentation is hereby granted, provided that both the copyright
13 * notice and this permission notice appear in all copies of the
14 * software, derivative works or modified versions, and any portions
15 * thereof, and that both notices appear in supporting documentation.
17 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
18 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
19 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
21 * Carnegie Mellon requests users of this software to return to
23 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
24 * School of Computer Science
25 * Carnegie Mellon University
26 * Pittsburgh PA 15213-3890
28 * any improvements or extensions that they make and grant Carnegie the
29 * rights to redistribute these changes.
32 #include <sys/param.h>
36 #include <sys/types.h>
43 #include <vm/vm_param.h>
47 #include <machine/pmap.h>
48 #include "kvm_private.h"
50 static off_t _kvm_pa2off(kvm_t *kd, u_long pa);
53 u_int64_t lev1map_pa; /* PA of Lev1map */
54 u_int64_t page_size; /* Page size */
55 u_int64_t nmemsegs; /* Number of RAM segm */
63 /* Not actually used for anything right now, but safe. */
73 struct nlist nlist[2];
76 vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm));
78 _kvm_err(kd, kd->program, "cannot allocate vm");
82 vm->page_size = ALPHA_PGBYTES;
84 nlist[0].n_name = "_Lev1map";
87 if (kvm_nlist(kd, nlist) != 0) {
88 _kvm_err(kd, kd->program, "bad namelist");
93 if (kvm_read(kd, (nlist[0].n_value), &pa, sizeof(pa)) != sizeof(pa)) {
94 _kvm_err(kd, kd->program, "cannot read Lev1map");
98 if (kvm_read(kd, (nlist[0].n_value), &pa, sizeof(pa)) != sizeof(pa)) {
99 _kvm_err(kd, kd->program, "cannot read Lev1map");
108 _kvm_kvatop(kd, va, pa)
113 u_int64_t lev1map_pa; /* PA of Lev1map */
116 alpha_pt_entry_t pte;
123 _kvm_err(kd, 0, "vatop called in live kernel!");
126 lev1map_pa = vm->lev1map_pa;
127 page_size = vm->page_size;
129 page_off = va & (page_size - 1);
130 if (va >= ALPHA_K0SEG_BASE && va <= ALPHA_K0SEG_END) {
132 * Direct-mapped address: just convert it.
135 *pa = ALPHA_K0SEG_TO_PHYS(va);
136 rv = page_size - page_off;
137 } else if (va >= ALPHA_K1SEG_BASE && va <= ALPHA_K1SEG_END) {
139 * Real kernel virtual address: do the translation.
141 #define PTMASK ((1 << ALPHA_PTSHIFT) - 1)
142 #define pmap_lev1_index(va) (((va) >> ALPHA_L1SHIFT) & PTMASK)
143 #define pmap_lev2_index(va) (((va) >> ALPHA_L2SHIFT) & PTMASK)
144 #define pmap_lev3_index(va) (((va) >> ALPHA_L3SHIFT) & PTMASK)
146 /* Find and read the L1 PTE. */
147 pteoff = lev1map_pa +
148 pmap_lev1_index(va) * sizeof(alpha_pt_entry_t);
149 if (lseek(kd->pmfd, _kvm_pa2off(kd, pteoff), 0) == -1 ||
150 read(kd->pmfd, (char *)&pte, sizeof(pte)) != sizeof(pte)) {
151 _kvm_syserr(kd, 0, "could not read L1 PTE");
155 /* Find and read the L2 PTE. */
156 if ((pte & ALPHA_PTE_VALID) == 0) {
157 _kvm_err(kd, 0, "invalid translation (invalid L1 PTE)");
160 pteoff = ALPHA_PTE_TO_PFN(pte) * page_size +
161 pmap_lev2_index(va) * sizeof(alpha_pt_entry_t);
162 if (lseek(kd->pmfd, _kvm_pa2off(kd, pteoff), 0) == -1 ||
163 read(kd->pmfd, (char *)&pte, sizeof(pte)) != sizeof(pte)) {
164 _kvm_syserr(kd, 0, "could not read L2 PTE");
168 /* Find and read the L3 PTE. */
169 if ((pte & ALPHA_PTE_VALID) == 0) {
170 _kvm_err(kd, 0, "invalid translation (invalid L2 PTE)");
173 pteoff = ALPHA_PTE_TO_PFN(pte) * page_size +
174 pmap_lev3_index(va) * sizeof(alpha_pt_entry_t);
175 if (lseek(kd->pmfd, _kvm_pa2off(kd, pteoff), 0) == -1 ||
176 read(kd->pmfd, (char *)&pte, sizeof(pte)) != sizeof(pte)) {
177 _kvm_syserr(kd, 0, "could not read L3 PTE");
181 /* Fill in the PA. */
182 if ((pte & ALPHA_PTE_VALID) == 0) {
183 _kvm_err(kd, 0, "invalid translation (invalid L3 PTE)");
186 *pa = ALPHA_PTE_TO_PFN(pte) * page_size + page_off;
187 rv = page_size - page_off;
190 * Bogus address (not in KV space): punt.
193 _kvm_err(kd, 0, "invalid kernel virtual address");
203 * Translate a physical address to a file-offset in the crash-dump.
210 return ALPHA_K0SEG_TO_PHYS(pa);