projects / mirror_qemu.git / blame
| Commit | Line | Data |
|---|---|---|
| 188f24c2 XW |
1 | /* |
| 2 | * watchdog device diag288 support | |
| 3 | * | |
| 4 | * Copyright IBM, Corp. 2015 | |
| 5 | * | |
| 6 | * Authors: | |
| 7 | * Xu Wang <gesaint@linux.vnet.ibm.com> | |
| 8 | * | |
| 9 | * This work is licensed under the terms of the GNU GPL, version 2 or (at your | |
| 10 | * option) any later version. See the COPYING file in the top-level directory. | |
| 11 | * | |
| 12 | */ | |
| 13 | ||
| 14 | #include "sysemu/watchdog.h" | |
| 15 | #include "hw/sysbus.h" | |
| 16 | #include "qemu/timer.h" | |
| 17 | #include "hw/watchdog/wdt_diag288.h" | |
| 18 | ||
| 19 | static WatchdogTimerModel model = { | |
| 20 | .wdt_name = TYPE_WDT_DIAG288, | |
| 21 | .wdt_description = "diag288 device for s390x platform", | |
| 22 | }; | |
| 23 | ||
| 24 | static void wdt_diag288_reset(DeviceState *dev) | |
| 25 | { | |
| 26 | DIAG288State *diag288 = DIAG288(dev); | |
| 27 | ||
| 28 | diag288->enabled = false; | |
| 29 | timer_del(diag288->timer); | |
| 30 | } | |
| 31 | ||
| 32 | static void diag288_timer_expired(void *dev) | |
| 33 | { | |
| 34 | qemu_log_mask(CPU_LOG_RESET, "Watchdog timer expired.\n"); | |
| 35 | watchdog_perform_action(); | |
| 36 | wdt_diag288_reset(dev); | |
| 37 | } | |
| 38 | ||
| 39 | static int wdt_diag288_handle_timer(DIAG288State *diag288, | |
| 40 | uint64_t func, uint64_t timeout) | |
| 41 | { | |
| 42 | switch (func) { | |
| 43 | case WDT_DIAG288_INIT: | |
| 44 | diag288->enabled = true; | |
| 45 | /* fall through */ | |
| 46 | case WDT_DIAG288_CHANGE: | |
| 47 | if (!diag288->enabled) { | |
| 48 | return -1; | |
| 49 | } | |
| 50 | timer_mod(diag288->timer, | |
| 51 | qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + | |
| 52 | timeout * get_ticks_per_sec()); | |
| 53 | break; | |
| 54 | case WDT_DIAG288_CANCEL: | |
| 55 | if (!diag288->enabled) { | |
| 56 | return -1; | |
| 57 | } | |
| 58 | diag288->enabled = false; | |
| 59 | timer_del(diag288->timer); | |
| 60 | break; | |
| 61 | default: | |
| 62 | return -1; | |
| 63 | } | |
| 64 | ||
| 65 | return 0; | |
| 66 | } | |
| 67 | ||
| 68 | static void wdt_diag288_realize(DeviceState *dev, Error **errp) | |
| 69 | { | |
| 70 | DIAG288State *diag288 = DIAG288(dev); | |
| 71 | ||
| 72 | diag288->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, diag288_timer_expired, | |
| 73 | dev); | |
| 74 | } | |
| 75 | ||
| 76 | static void wdt_diag288_unrealize(DeviceState *dev, Error **errp) | |
| 77 | { | |
| 78 | DIAG288State *diag288 = DIAG288(dev); | |
| 79 | ||
| 80 | timer_del(diag288->timer); | |
| 81 | timer_free(diag288->timer); | |
| 82 | } | |
| 83 | ||
| 84 | static void wdt_diag288_class_init(ObjectClass *klass, void *data) | |
| 85 | { | |
| 86 | DeviceClass *dc = DEVICE_CLASS(klass); | |
| 87 | DIAG288Class *diag288 = DIAG288_CLASS(klass); | |
| 88 | ||
| 89 | dc->realize = wdt_diag288_realize; | |
| 90 | dc->unrealize = wdt_diag288_unrealize; | |
| 91 | dc->reset = wdt_diag288_reset; | |
| 92 | set_bit(DEVICE_CATEGORY_MISC, dc->categories); | |
| 93 | diag288->handle_timer = wdt_diag288_handle_timer; | |
| 94 | } | |
| 95 | ||
| 96 | static const TypeInfo wdt_diag288_info = { | |
| 97 | .class_init = wdt_diag288_class_init, | |
| 98 | .parent = TYPE_DEVICE, | |
| 99 | .name = TYPE_WDT_DIAG288, | |
| 100 | .instance_size = sizeof(DIAG288State), | |
| 101 | .class_size = sizeof(DIAG288Class), | |
| 102 | }; | |
| 103 | ||
| 104 | static void wdt_diag288_register_types(void) | |
| 105 | { | |
| 106 | watchdog_add_model(&model); | |
| 107 | type_register_static(&wdt_diag288_info); | |
| 108 | } | |
| 109 | ||
| 110 | type_init(wdt_diag288_register_types) |