1 /* $NetBSD: kvm_x86_64.c,v 1.5 2005/08/04 19:26:02 fvdl Exp $ */
4 * Copyright (c) 1989, 1992, 1993
5 * The Regents of the University of California. All rights reserved.
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.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
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.
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
36 #include <sys/cdefs.h>
37 #if defined(LIBC_SCCS) && !defined(lint)
39 static char sccsid
[] = "@(#)kvm_hp300.c 8.1 (Berkeley) 6/4/93";
41 __RCSID("$NetBSD: kvm_x86_64.c,v 1.5 2005/08/04 19:26:02 fvdl Exp $");
43 #endif /* LIBC_SCCS and not lint */
46 * x86-64 machine dependent routines for kvm.
49 #include <sys/param.h>
53 #include <sys/kcore.h>
54 #include <machine/kcore.h>
60 #include <uvm/uvm_extern.h>
65 #include "kvm_private.h"
67 #include <machine/pmap.h>
68 #include <machine/pte.h>
69 #include <machine/vmparam.h>
76 /* Not actually used for anything right now, but safe. */
91 * Translate a kernel virtual address to a physical address.
94 _kvm_kvatop(kd
, va
, pa
)
99 cpu_kcore_hdr_t
*cpu_kh
;
103 paddr_t pde_pa
, pte_pa
;
106 _kvm_err(kd
, 0, "vatop called in live kernel!");
110 cpu_kh
= kd
->cpu_data
;
111 page_off
= va
& PGOFSET
;
114 * Find and read all entries to get to the pa.
120 pde_pa
= cpu_kh
->ptdpaddr
+ (pl4_pi(va
) * sizeof(pd_entry_t
));
121 if (_kvm_pread(kd
, kd
->pmfd
, (void *)&pde
, sizeof(pde
),
122 _kvm_pa2off(kd
, pde_pa
)) != sizeof(pde
)) {
123 _kvm_syserr(kd
, 0, "could not read PT level 4 entry");
126 if ((pde
& PG_V
) == 0) {
127 _kvm_err(kd
, 0, "invalid translation (invalid level 4 PDE)");
134 pde_pa
= (pde
& PG_FRAME
) + (pl3_pi(va
) * sizeof(pd_entry_t
));
135 if (_kvm_pread(kd
, kd
->pmfd
, (void *)&pde
, sizeof(pde
),
136 _kvm_pa2off(kd
, pde_pa
)) != sizeof(pde
)) {
137 _kvm_syserr(kd
, 0, "could not read PT level 3 entry");
140 if ((pde
& PG_V
) == 0) {
141 _kvm_err(kd
, 0, "invalid translation (invalid level 3 PDE)");
148 pde_pa
= (pde
& PG_FRAME
) + (pl2_pi(va
) * sizeof(pd_entry_t
));
149 if (_kvm_pread(kd
, kd
->pmfd
, (void *)&pde
, sizeof(pde
),
150 _kvm_pa2off(kd
, pde_pa
)) != sizeof(pde
)) {
151 _kvm_syserr(kd
, 0, "could not read PT level 2 entry");
154 if ((pde
& PG_V
) == 0) {
155 _kvm_err(kd
, 0, "invalid translation (invalid level 2 PDE)");
163 pte_pa
= (pde
& PG_FRAME
) + (pl1_pi(va
) * sizeof(pt_entry_t
));
164 if (_kvm_pread(kd
, kd
->pmfd
, (void *) &pte
, sizeof(pte
),
165 _kvm_pa2off(kd
, pte_pa
)) != sizeof(pte
)) {
166 _kvm_syserr(kd
, 0, "could not read PTE");
170 * Validate the PTE and return the physical address.
172 if ((pte
& PG_V
) == 0) {
173 _kvm_err(kd
, 0, "invalid translation (invalid PTE)");
176 *pa
= (pte
& PG_FRAME
) + page_off
;
177 return (int)(NBPG
- page_off
);
185 * Translate a physical address to a file-offset in the crash dump.
192 cpu_kcore_hdr_t
*cpu_kh
;
193 phys_ram_seg_t
*ramsegs
;
197 cpu_kh
= kd
->cpu_data
;
198 ramsegs
= (void *)((char *)(void *)cpu_kh
+ ALIGN(sizeof *cpu_kh
));
201 for (i
= 0; i
< cpu_kh
->nmemsegs
; i
++) {
202 if (pa
>= ramsegs
[i
].start
&&
203 (pa
- ramsegs
[i
].start
) < ramsegs
[i
].size
) {
204 off
+= (pa
- ramsegs
[i
].start
);
207 off
+= ramsegs
[i
].size
;
210 return (kd
->dump_off
+ off
);
214 * Machine-dependent initialization for ALL open kvm descriptors,
215 * not just those for a kernel crash dump. Some architectures
216 * have to deal with these NOT being constants! (i.e. m68k)
223 kd
->usrstack
= USRSTACK
;
224 kd
->min_uva
= VM_MIN_ADDRESS
;
225 kd
->max_uva
= VM_MAXUSER_ADDRESS
;