1 /* $NetBSD: kvm_hppa.c,v 1.8 2022/01/10 19:51:30 christos 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
39 static char sccsid[] = "@(#)kvm_hp300.c 8.1 (Berkeley) 6/4/93";
40 #else
41 __RCSID("$NetBSD: kvm_hppa.c,v 1.8 2022/01/10 19:51:30 christos 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/proc.h>
53 #include <sys/stat.h>
54 #include <sys/kcore.h>
55 #include <sys/types.h>
56
57 #include <stdlib.h>
58 #include <unistd.h>
59 #include <nlist.h>
60 #include <kvm.h>
61
62 #include <uvm/uvm_extern.h>
63
64 #include <limits.h>
65 #include <db.h>
66
67 #include "kvm_private.h"
68
69 #include <machine/kcore.h>
70 #include <machine/pmap.h>
71 #include <machine/pte.h>
72 #include <machine/vmparam.h>
73
74 #ifndef btop
75 #define btop(x) (((unsigned)(x)) >> PGSHIFT) /* XXX */
76 #define ptob(x) ((caddr_t)((x) << PGSHIFT)) /* XXX */
77 #endif
78
79 void
_kvm_freevtop(kvm_t * kd)80 _kvm_freevtop(kvm_t *kd)
81 {
82
83 /* Not actually used for anything right now, but safe. */
84 if (kd->vmst != 0)
85 free(kd->vmst);
86 }
87
88 /*ARGSUSED*/
89 int
_kvm_initvtop(kvm_t * kd)90 _kvm_initvtop(kvm_t *kd)
91 {
92
93 return 0;
94 }
95
96 /*
97 * Translate a kernel virtual address to a physical address.
98 */
99 int
_kvm_kvatop(kvm_t * kd,vaddr_t va,paddr_t * pa)100 _kvm_kvatop(kvm_t *kd, vaddr_t va, paddr_t *pa)
101 {
102 #if 0
103 cpu_kcore_hdr_t *cpu_kh;
104 u_long page_off;
105 pd_entry_t pde;
106 pt_entry_t pte;
107 u_long pde_pa, pte_pa;
108 #endif
109
110 if (ISALIVE(kd)) {
111 _kvm_err(kd, 0, "vatop called in live kernel!");
112 return 0;
113 }
114
115 _kvm_syserr(kd, 0, "could not read PTE");
116
117 #if 0
118 cpu_kh = kd->cpu_data;
119 page_off = va & PGOFSET;
120
121 /*
122 * Find and read the page directory entry.
123 */
124 pde_pa = cpu_kh->ptdpaddr + (pdei(va) * sizeof(pd_entry_t));
125 if (_kvm_pread(kd, kd->pmfd, (void *)&pde, sizeof(pde),
126 _kvm_pa2off(kd, pde_pa)) != sizeof(pde)) {
127 _kvm_syserr(kd, 0, "could not read PDE");
128 goto lose;
129 }
130
131 /*
132 * Find and read the page table entry.
133 */
134 if ((pde & PG_V) == 0) {
135 _kvm_err(kd, 0, "invalid translation (invalid PDE)");
136 goto lose;
137 }
138 pte_pa = (pde & PG_FRAME) + (ptei(va) * sizeof(pt_entry_t));
139 if (_kvm_pread(kd, kd->pmfd, (void *) &pte, sizeof(pte),
140 _kvm_pa2off(kd, pte_pa)) != sizeof(pte)) {
141 _kvm_syserr(kd, 0, "could not read PTE");
142 goto lose;
143 }
144
145 /*
146 * Validate the PTE and return the physical address.
147 */
148 if ((pte & PG_V) == 0) {
149 _kvm_err(kd, 0, "invalid translation (invalid PTE)");
150 goto lose;
151 }
152 *pa = (pte & PG_FRAME) + page_off;
153 return (int)(NBPG - page_off);
154
155 lose:
156 #endif
157 *pa = (u_long)~0L;
158 return 0;
159 }
160
161 /*
162 * Translate a physical address to a file-offset in the crash dump.
163 */
164 off_t
_kvm_pa2off(kvm_t * kd,paddr_t pa)165 _kvm_pa2off(kvm_t *kd, paddr_t pa)
166 {
167 #if 0
168 cpu_kcore_hdr_t *cpu_kh;
169 phys_ram_seg_t *ramsegs;
170 off_t off;
171 int i;
172
173 cpu_kh = kd->cpu_data;
174 ramsegs = (void *)((char *)(void *)cpu_kh + ALIGN(sizeof *cpu_kh));
175
176 off = 0;
177 for (i = 0; i < cpu_kh->nmemsegs; i++) {
178 if (pa >= ramsegs[i].start &&
179 (pa - ramsegs[i].start) < ramsegs[i].size) {
180 off += (pa - ramsegs[i].start);
181 break;
182 }
183 off += ramsegs[i].size;
184 }
185
186 return kd->dump_off + off;
187 #endif
188 return 0;
189 }
190
191 /*
192 * Machine-dependent initialization for ALL open kvm descriptors,
193 * not just those for a kernel crash dump. Some architectures
194 * have to deal with these NOT being constants! (i.e. m68k)
195 */
196 int
_kvm_mdopen(kvm_t * kd)197 _kvm_mdopen(kvm_t *kd)
198 {
199
200 kd->min_uva = VM_MIN_ADDRESS;
201 kd->max_uva = VM_MAXUSER_ADDRESS;
202
203 return 0;
204 }
205