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authorYang Zhang <yang.z.zhang@intel.com>2015-08-28 09:58:54 +0800
committerYang Zhang <yang.z.zhang@intel.com>2015-09-01 12:44:00 +0800
commite44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch)
tree66b09f592c55df2878107a468a91d21506104d3f /qemu/hw/watchdog/wdt_diag288.c
parent9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff)
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5 Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/hw/watchdog/wdt_diag288.c')
-rw-r--r--qemu/hw/watchdog/wdt_diag288.c130
1 files changed, 130 insertions, 0 deletions
diff --git a/qemu/hw/watchdog/wdt_diag288.c b/qemu/hw/watchdog/wdt_diag288.c
new file mode 100644
index 000000000..2a885a447
--- /dev/null
+++ b/qemu/hw/watchdog/wdt_diag288.c
@@ -0,0 +1,130 @@
+/*
+ * watchdog device diag288 support
+ *
+ * Copyright IBM, Corp. 2015
+ *
+ * Authors:
+ * Xu Wang <gesaint@linux.vnet.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at your
+ * option) any later version. See the COPYING file in the top-level directory.
+ *
+ */
+
+#include "sysemu/watchdog.h"
+#include "hw/sysbus.h"
+#include "qemu/timer.h"
+#include "hw/watchdog/wdt_diag288.h"
+
+static WatchdogTimerModel model = {
+ .wdt_name = TYPE_WDT_DIAG288,
+ .wdt_description = "diag288 device for s390x platform",
+};
+
+static const VMStateDescription vmstate_diag288 = {
+ .name = "vmstate_diag288",
+ .version_id = 0,
+ .minimum_version_id = 0,
+ .fields = (VMStateField[]) {
+ VMSTATE_TIMER_PTR(timer, DIAG288State),
+ VMSTATE_BOOL(enabled, DIAG288State),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static void wdt_diag288_reset(DeviceState *dev)
+{
+ DIAG288State *diag288 = DIAG288(dev);
+
+ diag288->enabled = false;
+ timer_del(diag288->timer);
+}
+
+static void diag288_reset(void *opaque)
+{
+ DeviceState *diag288 = opaque;
+
+ wdt_diag288_reset(diag288);
+}
+
+static void diag288_timer_expired(void *dev)
+{
+ qemu_log_mask(CPU_LOG_RESET, "Watchdog timer expired.\n");
+ watchdog_perform_action();
+ wdt_diag288_reset(dev);
+}
+
+static int wdt_diag288_handle_timer(DIAG288State *diag288,
+ uint64_t func, uint64_t timeout)
+{
+ switch (func) {
+ case WDT_DIAG288_INIT:
+ diag288->enabled = true;
+ /* fall through */
+ case WDT_DIAG288_CHANGE:
+ if (!diag288->enabled) {
+ return -1;
+ }
+ timer_mod(diag288->timer,
+ qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
+ timeout * get_ticks_per_sec());
+ break;
+ case WDT_DIAG288_CANCEL:
+ if (!diag288->enabled) {
+ return -1;
+ }
+ diag288->enabled = false;
+ timer_del(diag288->timer);
+ break;
+ default:
+ return -1;
+ }
+
+ return 0;
+}
+
+static void wdt_diag288_realize(DeviceState *dev, Error **errp)
+{
+ DIAG288State *diag288 = DIAG288(dev);
+
+ qemu_register_reset(diag288_reset, diag288);
+ diag288->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, diag288_timer_expired,
+ dev);
+}
+
+static void wdt_diag288_unrealize(DeviceState *dev, Error **errp)
+{
+ DIAG288State *diag288 = DIAG288(dev);
+
+ timer_del(diag288->timer);
+ timer_free(diag288->timer);
+}
+
+static void wdt_diag288_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ DIAG288Class *diag288 = DIAG288_CLASS(klass);
+
+ dc->realize = wdt_diag288_realize;
+ dc->unrealize = wdt_diag288_unrealize;
+ dc->reset = wdt_diag288_reset;
+ set_bit(DEVICE_CATEGORY_MISC, dc->categories);
+ dc->vmsd = &vmstate_diag288;
+ diag288->handle_timer = wdt_diag288_handle_timer;
+}
+
+static const TypeInfo wdt_diag288_info = {
+ .class_init = wdt_diag288_class_init,
+ .parent = TYPE_DEVICE,
+ .name = TYPE_WDT_DIAG288,
+ .instance_size = sizeof(DIAG288State),
+ .class_size = sizeof(DIAG288Class),
+};
+
+static void wdt_diag288_register_types(void)
+{
+ watchdog_add_model(&model);
+ type_register_static(&wdt_diag288_info);
+}
+
+type_init(wdt_diag288_register_types)