1 /* $NetBSD: db_machdep.c,v 1.12 2010/06/06 03:34:14 mrg Exp $ */
2
3 /*-
4 * Copyright (c) 1996 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Gordon W. Ross.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 /*
33 * Machine-dependent functions used by ddb
34 */
35
36 #include <sys/cdefs.h>
37 __KERNEL_RCSID(0, "$NetBSD: db_machdep.c,v 1.12 2010/06/06 03:34:14 mrg Exp $");
38
39 #include <sys/param.h>
40 #include <sys/proc.h>
41
42 #include <uvm/uvm_extern.h>
43
44 #include <machine/db_machdep.h>
45 #include <machine/promlib.h>
46 #include <machine/pte.h>
47
48 #include <sun2/sun2/machdep.h>
49 #include <sun2/sun2/control.h>
50
51 #include <ddb/db_command.h>
52 #include <ddb/db_output.h>
53 #include <ddb/db_interface.h>
54
55 static void db_mach_abort (db_expr_t, bool, db_expr_t, const char *);
56 static void db_mach_halt (db_expr_t, bool, db_expr_t, const char *);
57 static void db_mach_reboot (db_expr_t, bool, db_expr_t, const char *);
58 static void db_mach_pagemap(db_expr_t, bool, db_expr_t, const char *);
59
60 const struct db_command db_machine_command_table[] = {
61 { DDB_ADD_CMD("abort", db_mach_abort, 0,
62 "Calls prom_abort()", NULL, NULL) },
63 { DDB_ADD_CMD("halt", db_mach_halt, 0,
64 "Calls prom_halt()", NULL, NULL) },
65 { DDB_ADD_CMD("pgmap", db_mach_pagemap, CS_SET_DOT,
66 "Prints the PTE and segmap values", "virtual-address", NULL) },
67 { DDB_ADD_CMD("reboot", db_mach_reboot, 0,
68 "Calls prom_boot()", NULL, NULL) },
69 { DDB_ADD_CMD( NULL,NULL,0,NULL,NULL,NULL) }
70 };
71
72 /*
73 * Machine-specific ddb commands for the sun2:
74 * abort: Drop into monitor via abort (allows continue)
75 * halt: Exit to monitor as in halt(8)
76 * reboot: Reboot the machine as in reboot(8)
77 * pgmap: Given addr, Print addr, segmap, pagemap, pte
78 */
79
80 static void
db_mach_abort(db_expr_t addr,bool have_addr,db_expr_t count,const char * modif)81 db_mach_abort(db_expr_t addr, bool have_addr, db_expr_t count,
82 const char *modif)
83 {
84 prom_abort();
85 }
86
87 static void
db_mach_halt(db_expr_t addr,bool have_addr,db_expr_t count,const char * modif)88 db_mach_halt(db_expr_t addr, bool have_addr, db_expr_t count,
89 const char *modif)
90 {
91 prom_halt();
92 }
93
94 static void
db_mach_reboot(db_expr_t addr,bool have_addr,db_expr_t count,const char * modif)95 db_mach_reboot(db_expr_t addr, bool have_addr, db_expr_t count,
96 const char *modif)
97 {
98 prom_boot("");
99 }
100
101
102 static void pte_print(int);
103
104 static void
db_mach_pagemap(db_expr_t addr,bool have_addr,db_expr_t count,const char * modif)105 db_mach_pagemap(db_expr_t addr, bool have_addr, db_expr_t count,
106 const char *modif)
107 {
108 u_long va = m68k_trunc_page((u_long)addr);
109 int pte;
110 int sme;
111
112 sme = get_segmap(va);
113 if (sme == 0xFF) pte = 0;
114 else pte = get_pte(va);
115 db_printf("0x%08lx [%02x] 0x%08x", va, sme, pte);
116
117 pte_print(pte);
118 db_next = va + PAGE_SIZE;
119 }
120
121 static void
pte_print(int pte)122 pte_print(int pte)
123 {
124 int t;
125 static const char *pgt_names[] = {
126 "MEM", "OBIO", "VME0", "VME8",
127 };
128
129 if (pte & PG_VALID) {
130 db_printf(" V");
131 if (pte & PG_WRITE)
132 db_printf(" W");
133 if (pte & PG_SYSTEM)
134 db_printf(" S");
135 if (pte & PG_NC)
136 db_printf(" NC");
137 if (pte & PG_REF)
138 db_printf(" Ref");
139 if (pte & PG_MOD)
140 db_printf(" Mod");
141
142 t = (pte >> PG_TYPE_SHIFT) & 3;
143 db_printf(" %s", pgt_names[t]);
144 db_printf(" PA=0x%x\n", PG_PA(pte));
145 }
146 else db_printf(" INVALID\n");
147 }
148