root / hw / watchdog.c @ 88b3be20
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1 | 9dd986cc | Richard W.M. Jones | /*
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2 | 9dd986cc | Richard W.M. Jones | * Virtual hardware watchdog.
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3 | 9dd986cc | Richard W.M. Jones | *
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4 | 9dd986cc | Richard W.M. Jones | * Copyright (C) 2009 Red Hat Inc.
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5 | 9dd986cc | Richard W.M. Jones | *
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6 | 9dd986cc | Richard W.M. Jones | * This program is free software; you can redistribute it and/or
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7 | 9dd986cc | Richard W.M. Jones | * modify it under the terms of the GNU General Public License
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8 | 9dd986cc | Richard W.M. Jones | * as published by the Free Software Foundation; either version 2
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9 | 9dd986cc | Richard W.M. Jones | * of the License, or (at your option) any later version.
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10 | 9dd986cc | Richard W.M. Jones | *
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11 | 9dd986cc | Richard W.M. Jones | * This program is distributed in the hope that it will be useful,
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12 | 9dd986cc | Richard W.M. Jones | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | 9dd986cc | Richard W.M. Jones | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 | 9dd986cc | Richard W.M. Jones | * GNU General Public License for more details.
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15 | 9dd986cc | Richard W.M. Jones | *
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16 | 9dd986cc | Richard W.M. Jones | * You should have received a copy of the GNU General Public License
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17 | 8167ee88 | Blue Swirl | * along with this program; if not, see <http://www.gnu.org/licenses/>.
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18 | 9dd986cc | Richard W.M. Jones | *
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19 | 9dd986cc | Richard W.M. Jones | * By Richard W.M. Jones (rjones@redhat.com).
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20 | 9dd986cc | Richard W.M. Jones | */
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21 | 9dd986cc | Richard W.M. Jones | |
22 | 9dd986cc | Richard W.M. Jones | #include "qemu-common.h" |
23 | 9dd986cc | Richard W.M. Jones | #include "sys-queue.h" |
24 | 9dd986cc | Richard W.M. Jones | #include "sysemu.h" |
25 | 9dd986cc | Richard W.M. Jones | #include "hw/watchdog.h" |
26 | 9dd986cc | Richard W.M. Jones | |
27 | 88b3be20 | Markus Armbruster | /* Possible values for action parameter. */
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28 | 88b3be20 | Markus Armbruster | #define WDT_RESET 1 /* Hard reset. */ |
29 | 88b3be20 | Markus Armbruster | #define WDT_SHUTDOWN 2 /* Shutdown. */ |
30 | 88b3be20 | Markus Armbruster | #define WDT_POWEROFF 3 /* Quit. */ |
31 | 88b3be20 | Markus Armbruster | #define WDT_PAUSE 4 /* Pause. */ |
32 | 88b3be20 | Markus Armbruster | #define WDT_DEBUG 5 /* Prints a message and continues running. */ |
33 | 88b3be20 | Markus Armbruster | #define WDT_NONE 6 /* Do nothing. */ |
34 | 88b3be20 | Markus Armbruster | |
35 | 88b3be20 | Markus Armbruster | static WatchdogTimerModel *watchdog;
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36 | 88b3be20 | Markus Armbruster | static int watchdog_action = WDT_RESET; |
37 | 9dd986cc | Richard W.M. Jones | static LIST_HEAD(watchdog_list, WatchdogTimerModel) watchdog_list;
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38 | 9dd986cc | Richard W.M. Jones | |
39 | 9dd986cc | Richard W.M. Jones | void watchdog_add_model(WatchdogTimerModel *model)
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40 | 9dd986cc | Richard W.M. Jones | { |
41 | 9dd986cc | Richard W.M. Jones | LIST_INSERT_HEAD(&watchdog_list, model, entry); |
42 | 9dd986cc | Richard W.M. Jones | } |
43 | 9dd986cc | Richard W.M. Jones | |
44 | 9dd986cc | Richard W.M. Jones | /* Returns:
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45 | 9dd986cc | Richard W.M. Jones | * 0 = continue
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46 | 9dd986cc | Richard W.M. Jones | * 1 = exit program with error
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47 | 9dd986cc | Richard W.M. Jones | * 2 = exit program without error
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48 | 9dd986cc | Richard W.M. Jones | */
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49 | 9dd986cc | Richard W.M. Jones | int select_watchdog(const char *p) |
50 | 9dd986cc | Richard W.M. Jones | { |
51 | 9dd986cc | Richard W.M. Jones | WatchdogTimerModel *model; |
52 | 9dd986cc | Richard W.M. Jones | |
53 | 9dd986cc | Richard W.M. Jones | if (watchdog) {
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54 | 9dd986cc | Richard W.M. Jones | fprintf(stderr, |
55 | 9dd986cc | Richard W.M. Jones | "qemu: only one watchdog option may be given\n");
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56 | 9dd986cc | Richard W.M. Jones | return 1; |
57 | 9dd986cc | Richard W.M. Jones | } |
58 | 9dd986cc | Richard W.M. Jones | |
59 | 9dd986cc | Richard W.M. Jones | /* -watchdog ? lists available devices and exits cleanly. */
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60 | 9dd986cc | Richard W.M. Jones | if (strcmp(p, "?") == 0) { |
61 | 9dd986cc | Richard W.M. Jones | LIST_FOREACH(model, &watchdog_list, entry) { |
62 | 9dd986cc | Richard W.M. Jones | fprintf(stderr, "\t%s\t%s\n",
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63 | 9dd986cc | Richard W.M. Jones | model->wdt_name, model->wdt_description); |
64 | 9dd986cc | Richard W.M. Jones | } |
65 | 9dd986cc | Richard W.M. Jones | return 2; |
66 | 9dd986cc | Richard W.M. Jones | } |
67 | 9dd986cc | Richard W.M. Jones | |
68 | 9dd986cc | Richard W.M. Jones | LIST_FOREACH(model, &watchdog_list, entry) { |
69 | 9dd986cc | Richard W.M. Jones | if (strcasecmp(model->wdt_name, p) == 0) { |
70 | 9dd986cc | Richard W.M. Jones | watchdog = model; |
71 | 9dd986cc | Richard W.M. Jones | return 0; |
72 | 9dd986cc | Richard W.M. Jones | } |
73 | 9dd986cc | Richard W.M. Jones | } |
74 | 9dd986cc | Richard W.M. Jones | |
75 | 9dd986cc | Richard W.M. Jones | fprintf(stderr, "Unknown -watchdog device. Supported devices are:\n");
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76 | 9dd986cc | Richard W.M. Jones | LIST_FOREACH(model, &watchdog_list, entry) { |
77 | 9dd986cc | Richard W.M. Jones | fprintf(stderr, "\t%s\t%s\n",
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78 | 9dd986cc | Richard W.M. Jones | model->wdt_name, model->wdt_description); |
79 | 9dd986cc | Richard W.M. Jones | } |
80 | 9dd986cc | Richard W.M. Jones | return 1; |
81 | 9dd986cc | Richard W.M. Jones | } |
82 | 9dd986cc | Richard W.M. Jones | |
83 | 9dd986cc | Richard W.M. Jones | int select_watchdog_action(const char *p) |
84 | 9dd986cc | Richard W.M. Jones | { |
85 | 9dd986cc | Richard W.M. Jones | if (strcasecmp(p, "reset") == 0) |
86 | 9dd986cc | Richard W.M. Jones | watchdog_action = WDT_RESET; |
87 | 9dd986cc | Richard W.M. Jones | else if (strcasecmp(p, "shutdown") == 0) |
88 | 9dd986cc | Richard W.M. Jones | watchdog_action = WDT_SHUTDOWN; |
89 | 9dd986cc | Richard W.M. Jones | else if (strcasecmp(p, "poweroff") == 0) |
90 | 9dd986cc | Richard W.M. Jones | watchdog_action = WDT_POWEROFF; |
91 | 9dd986cc | Richard W.M. Jones | else if (strcasecmp(p, "pause") == 0) |
92 | 9dd986cc | Richard W.M. Jones | watchdog_action = WDT_PAUSE; |
93 | 9dd986cc | Richard W.M. Jones | else if (strcasecmp(p, "debug") == 0) |
94 | 9dd986cc | Richard W.M. Jones | watchdog_action = WDT_DEBUG; |
95 | 9dd986cc | Richard W.M. Jones | else if (strcasecmp(p, "none") == 0) |
96 | 9dd986cc | Richard W.M. Jones | watchdog_action = WDT_NONE; |
97 | 9dd986cc | Richard W.M. Jones | else
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98 | 9dd986cc | Richard W.M. Jones | return -1; |
99 | 9dd986cc | Richard W.M. Jones | |
100 | 9dd986cc | Richard W.M. Jones | return 0; |
101 | 9dd986cc | Richard W.M. Jones | } |
102 | 9dd986cc | Richard W.M. Jones | |
103 | 9dd986cc | Richard W.M. Jones | /* This actually performs the "action" once a watchdog has expired,
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104 | 9dd986cc | Richard W.M. Jones | * ie. reboot, shutdown, exit, etc.
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105 | 9dd986cc | Richard W.M. Jones | */
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106 | 9dd986cc | Richard W.M. Jones | void watchdog_perform_action(void) |
107 | 9dd986cc | Richard W.M. Jones | { |
108 | 9dd986cc | Richard W.M. Jones | switch(watchdog_action) {
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109 | 9dd986cc | Richard W.M. Jones | case WDT_RESET: /* same as 'system_reset' in monitor */ |
110 | 9dd986cc | Richard W.M. Jones | qemu_system_reset_request(); |
111 | 9dd986cc | Richard W.M. Jones | break;
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112 | 9dd986cc | Richard W.M. Jones | |
113 | 9dd986cc | Richard W.M. Jones | case WDT_SHUTDOWN: /* same as 'system_powerdown' in monitor */ |
114 | 9dd986cc | Richard W.M. Jones | qemu_system_powerdown_request(); |
115 | 9dd986cc | Richard W.M. Jones | break;
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116 | 9dd986cc | Richard W.M. Jones | |
117 | 9dd986cc | Richard W.M. Jones | case WDT_POWEROFF: /* same as 'quit' command in monitor */ |
118 | 9dd986cc | Richard W.M. Jones | exit(0);
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119 | 9dd986cc | Richard W.M. Jones | break;
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120 | 9dd986cc | Richard W.M. Jones | |
121 | 9dd986cc | Richard W.M. Jones | case WDT_PAUSE: /* same as 'stop' command in monitor */ |
122 | 9dd986cc | Richard W.M. Jones | vm_stop(0);
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123 | 9dd986cc | Richard W.M. Jones | break;
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124 | 9dd986cc | Richard W.M. Jones | |
125 | 9dd986cc | Richard W.M. Jones | case WDT_DEBUG:
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126 | 9dd986cc | Richard W.M. Jones | fprintf(stderr, "watchdog: timer fired\n");
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127 | 9dd986cc | Richard W.M. Jones | break;
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128 | 9dd986cc | Richard W.M. Jones | |
129 | 9dd986cc | Richard W.M. Jones | case WDT_NONE:
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130 | 9dd986cc | Richard W.M. Jones | break;
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131 | 9dd986cc | Richard W.M. Jones | } |
132 | 9dd986cc | Richard W.M. Jones | } |
133 | 9dd986cc | Richard W.M. Jones | |
134 | 9dd986cc | Richard W.M. Jones | void watchdog_pc_init(PCIBus *pci_bus)
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135 | 9dd986cc | Richard W.M. Jones | { |
136 | 9dd986cc | Richard W.M. Jones | if (watchdog)
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137 | 9dd986cc | Richard W.M. Jones | watchdog->wdt_pc_init(pci_bus); |
138 | 9dd986cc | Richard W.M. Jones | } |
139 | 9dd986cc | Richard W.M. Jones | |
140 | 9dd986cc | Richard W.M. Jones | void register_watchdogs(void) |
141 | 9dd986cc | Richard W.M. Jones | { |
142 | 9dd986cc | Richard W.M. Jones | wdt_ib700_init(); |
143 | 9dd986cc | Richard W.M. Jones | wdt_i6300esb_init(); |
144 | 9dd986cc | Richard W.M. Jones | } |