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Annotation of qemu/hw/watchdog.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Virtual hardware watchdog.
        !             3:  *
        !             4:  * Copyright (C) 2009 Red Hat Inc.
        !             5:  *
        !             6:  * This program is free software; you can redistribute it and/or
        !             7:  * modify it under the terms of the GNU General Public License
        !             8:  * as published by the Free Software Foundation; either version 2
        !             9:  * of the License, or (at your option) any later version.
        !            10:  *
        !            11:  * This program is distributed in the hope that it will be useful,
        !            12:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            13:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            14:  * GNU General Public License for more details.
        !            15:  *
        !            16:  * You should have received a copy of the GNU General Public License
        !            17:  * along with this program; if not, see <http://www.gnu.org/licenses/>.
        !            18:  *
        !            19:  * By Richard W.M. Jones ([email protected]).
        !            20:  */
        !            21: 
        !            22: #include "qemu-common.h"
        !            23: #include "sys-queue.h"
        !            24: #include "sysemu.h"
        !            25: #include "hw/watchdog.h"
        !            26: 
        !            27: static LIST_HEAD(watchdog_list, WatchdogTimerModel) watchdog_list;
        !            28: 
        !            29: void watchdog_add_model(WatchdogTimerModel *model)
        !            30: {
        !            31:     LIST_INSERT_HEAD(&watchdog_list, model, entry);
        !            32: }
        !            33: 
        !            34: /* Returns:
        !            35:  *   0 = continue
        !            36:  *   1 = exit program with error
        !            37:  *   2 = exit program without error
        !            38:  */
        !            39: int select_watchdog(const char *p)
        !            40: {
        !            41:     WatchdogTimerModel *model;
        !            42: 
        !            43:     if (watchdog) {
        !            44:         fprintf(stderr,
        !            45:                  "qemu: only one watchdog option may be given\n");
        !            46:         return 1;
        !            47:     }
        !            48: 
        !            49:     /* -watchdog ? lists available devices and exits cleanly. */
        !            50:     if (strcmp(p, "?") == 0) {
        !            51:         LIST_FOREACH(model, &watchdog_list, entry) {
        !            52:             fprintf(stderr, "\t%s\t%s\n",
        !            53:                      model->wdt_name, model->wdt_description);
        !            54:         }
        !            55:         return 2;
        !            56:     }
        !            57: 
        !            58:     LIST_FOREACH(model, &watchdog_list, entry) {
        !            59:         if (strcasecmp(model->wdt_name, p) == 0) {
        !            60:             watchdog = model;
        !            61:             return 0;
        !            62:         }
        !            63:     }
        !            64: 
        !            65:     fprintf(stderr, "Unknown -watchdog device. Supported devices are:\n");
        !            66:     LIST_FOREACH(model, &watchdog_list, entry) {
        !            67:         fprintf(stderr, "\t%s\t%s\n",
        !            68:                  model->wdt_name, model->wdt_description);
        !            69:     }
        !            70:     return 1;
        !            71: }
        !            72: 
        !            73: int select_watchdog_action(const char *p)
        !            74: {
        !            75:     if (strcasecmp(p, "reset") == 0)
        !            76:         watchdog_action = WDT_RESET;
        !            77:     else if (strcasecmp(p, "shutdown") == 0)
        !            78:         watchdog_action = WDT_SHUTDOWN;
        !            79:     else if (strcasecmp(p, "poweroff") == 0)
        !            80:         watchdog_action = WDT_POWEROFF;
        !            81:     else if (strcasecmp(p, "pause") == 0)
        !            82:         watchdog_action = WDT_PAUSE;
        !            83:     else if (strcasecmp(p, "debug") == 0)
        !            84:         watchdog_action = WDT_DEBUG;
        !            85:     else if (strcasecmp(p, "none") == 0)
        !            86:         watchdog_action = WDT_NONE;
        !            87:     else
        !            88:         return -1;
        !            89: 
        !            90:     return 0;
        !            91: }
        !            92: 
        !            93: /* This actually performs the "action" once a watchdog has expired,
        !            94:  * ie. reboot, shutdown, exit, etc.
        !            95:  */
        !            96: void watchdog_perform_action(void)
        !            97: {
        !            98:     switch(watchdog_action) {
        !            99:     case WDT_RESET:             /* same as 'system_reset' in monitor */
        !           100:         qemu_system_reset_request();
        !           101:         break;
        !           102: 
        !           103:     case WDT_SHUTDOWN:          /* same as 'system_powerdown' in monitor */
        !           104:         qemu_system_powerdown_request();
        !           105:         break;
        !           106: 
        !           107:     case WDT_POWEROFF:          /* same as 'quit' command in monitor */
        !           108:         exit(0);
        !           109:         break;
        !           110: 
        !           111:     case WDT_PAUSE:             /* same as 'stop' command in monitor */
        !           112:         vm_stop(0);
        !           113:         break;
        !           114: 
        !           115:     case WDT_DEBUG:
        !           116:         fprintf(stderr, "watchdog: timer fired\n");
        !           117:         break;
        !           118: 
        !           119:     case WDT_NONE:
        !           120:         break;
        !           121:     }
        !           122: }
        !           123: 
        !           124: void watchdog_pc_init(PCIBus *pci_bus)
        !           125: {
        !           126:     if (watchdog)
        !           127:         watchdog->wdt_pc_init(pci_bus);
        !           128: }
        !           129: 
        !           130: void register_watchdogs(void)
        !           131: {
        !           132:     wdt_ib700_init();
        !           133:     wdt_i6300esb_init();
        !           134: }

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