1/*	$NetBSD: kvm_hppa.c,v 1.5 2010/06/24 20:46:11 skrll Exp $	*/
2
3/*-
4 * Copyright (c) 1989, 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_hp300.c	8.1 (Berkeley) 6/4/93";
40#else
41__RCSID("$NetBSD: kvm_hppa.c,v 1.5 2010/06/24 20:46:11 skrll Exp $");
42#endif
43#endif /* LIBC_SCCS and not lint */
44
45/*
46 * hppa machine dependent routines for kvm.
47 * XXX fredette - largely unimplemented so far.  what is here
48 * is lifted and disabled.
49 */
50
51#include <sys/param.h>
52#include <sys/user.h>
53#include <sys/proc.h>
54#include <sys/stat.h>
55#include <sys/kcore.h>
56#include <sys/types.h>
57
58#include <stdlib.h>
59#include <unistd.h>
60#include <nlist.h>
61#include <kvm.h>
62
63#include <uvm/uvm_extern.h>
64
65#include <limits.h>
66#include <db.h>
67
68#include "kvm_private.h"
69
70#include <machine/kcore.h>
71#include <machine/pmap.h>
72#include <machine/pte.h>
73#include <machine/vmparam.h>
74
75#ifndef btop
76#define	btop(x)		(((unsigned)(x)) >> PGSHIFT)	/* XXX */
77#define	ptob(x)		((caddr_t)((x) << PGSHIFT))	/* XXX */
78#endif
79
80void
81_kvm_freevtop(kvm_t *kd)
82{
83
84	/* Not actually used for anything right now, but safe. */
85	if (kd->vmst != 0)
86		free(kd->vmst);
87}
88
89/*ARGSUSED*/
90int
91_kvm_initvtop(kvm_t *kd)
92{
93
94	return 0;
95}
96
97/*
98 * Translate a kernel virtual address to a physical address.
99 */
100int
101_kvm_kvatop(kvm_t *kd, vaddr_t va, paddr_t *pa)
102{
103#if 0
104	cpu_kcore_hdr_t *cpu_kh;
105	u_long page_off;
106	pd_entry_t pde;
107	pt_entry_t pte;
108	u_long pde_pa, pte_pa;
109#endif
110
111	if (ISALIVE(kd)) {
112		_kvm_err(kd, 0, "vatop called in live kernel!");
113		return 0;
114	}
115
116	_kvm_syserr(kd, 0, "could not read PTE");
117
118#if 0
119	cpu_kh = kd->cpu_data;
120	page_off = va & PGOFSET;
121
122	/*
123	 * Find and read the page directory entry.
124	 */
125	pde_pa = cpu_kh->ptdpaddr + (pdei(va) * sizeof(pd_entry_t));
126	if (_kvm_pread(kd, kd->pmfd, (void *)&pde, sizeof(pde),
127	    _kvm_pa2off(kd, pde_pa)) != sizeof(pde)) {
128		_kvm_syserr(kd, 0, "could not read PDE");
129		goto lose;
130	}
131
132	/*
133	 * Find and read the page table entry.
134	 */
135	if ((pde & PG_V) == 0) {
136		_kvm_err(kd, 0, "invalid translation (invalid PDE)");
137		goto lose;
138	}
139	pte_pa = (pde & PG_FRAME) + (ptei(va) * sizeof(pt_entry_t));
140	if (_kvm_pread(kd, kd->pmfd, (void *) &pte, sizeof(pte),
141	    _kvm_pa2off(kd, pte_pa)) != sizeof(pte)) {
142		_kvm_syserr(kd, 0, "could not read PTE");
143		goto lose;
144	}
145
146	/*
147	 * Validate the PTE and return the physical address.
148	 */
149	if ((pte & PG_V) == 0) {
150		_kvm_err(kd, 0, "invalid translation (invalid PTE)");
151		goto lose;
152	}
153	*pa = (pte & PG_FRAME) + page_off;
154	return (int)(NBPG - page_off);
155
156 lose:
157#endif
158	*pa = (u_long)~0L;
159	return 0;
160}
161
162/*
163 * Translate a physical address to a file-offset in the crash dump.
164 */
165off_t
166_kvm_pa2off(kvm_t *kd, paddr_t pa)
167{
168#if 0
169	cpu_kcore_hdr_t *cpu_kh;
170	phys_ram_seg_t *ramsegs;
171	off_t off;
172	int i;
173
174	cpu_kh = kd->cpu_data;
175	ramsegs = (void *)((char *)(void *)cpu_kh + ALIGN(sizeof *cpu_kh));
176
177	off = 0;
178	for (i = 0; i < cpu_kh->nmemsegs; i++) {
179		if (pa >= ramsegs[i].start &&
180		    (pa - ramsegs[i].start) < ramsegs[i].size) {
181			off += (pa - ramsegs[i].start);
182			break;
183		}
184		off += ramsegs[i].size;
185	}
186
187	return kd->dump_off + off;
188#endif
189	return 0;
190}
191
192/*
193 * Machine-dependent initialization for ALL open kvm descriptors,
194 * not just those for a kernel crash dump.  Some architectures
195 * have to deal with these NOT being constants!  (i.e. m68k)
196 */
197int
198_kvm_mdopen(kvm_t *kd)
199{
200
201	kd->usrstack = USRSTACK;
202	kd->min_uva = VM_MIN_ADDRESS;
203	kd->max_uva = VM_MAXUSER_ADDRESS;
204
205	return 0;
206}
207