ARM64: initial port

src/sys/devtimer.c

@@ -0,0 +1,124 @@
+/**
+ * @file sys/devtimer.c
+ *
+ * @copyright 2015-2021 Bill Zissimopoulos
+ */
+/*
+ * This file is part of WinFsp.
+ *
+ * You can redistribute it and/or modify it under the terms of the GNU
+ * General Public License version 3 as published by the Free Software
+ * Foundation.
+ *
+ * Licensees holding a valid commercial license may use this software
+ * in accordance with the commercial license agreement provided in
+ * conjunction with the software.  The terms and conditions of any such
+ * commercial license agreement shall govern, supersede, and render
+ * ineffective any application of the GPLv3 license to this software,
+ * notwithstanding of any reference thereto in the software or
+ * associated repository.
+ */
+
+#include <sys/driver.h>
+
+/*
+ * IoTimer Emulation.
+ *
+ * This is required because IoInitializeTimer and friends is missing from Windows on ARM64.
+ */
+
+static LIST_ENTRY FspDeviceTimerList;
+static KSPIN_LOCK FspDeviceTimerLock;
+static KDPC FspDeviceTimerDpc;
+static KTIMER FspDeviceTimer;
+
+static KDEFERRED_ROUTINE FspDeviceTimerRoutine;
+
+NTSTATUS FspDeviceInitializeAllTimers(VOID)
+{
+    LARGE_INTEGER DueTime;
+    LONG Period;
+
+    InitializeListHead(&FspDeviceTimerList);
+    KeInitializeSpinLock(&FspDeviceTimerLock);
+
+    KeInitializeDpc(&FspDeviceTimerDpc, FspDeviceTimerRoutine, 0);
+    KeInitializeTimerEx(&FspDeviceTimer, SynchronizationTimer);
+
+    DueTime.QuadPart = 1000/*ms*/ * -10000;
+    Period = 1000/*ms*/;
+    KeSetTimerEx(&FspDeviceTimer, DueTime, Period, &FspDeviceTimerDpc);
+
+    return STATUS_SUCCESS;
+}
+
+VOID FspDeviceFinalizeAllTimers(VOID)
+{
+    KeCancelTimer(&FspDeviceTimer);
+
+#if DBG
+    KIRQL Irql;
+    KeAcquireSpinLock(&FspDeviceTimerLock, &Irql);
+    ASSERT(IsListEmpty(&FspDeviceTimerList));
+    KeReleaseSpinLock(&FspDeviceTimerLock, Irql);
+#endif
+}
+
+static VOID FspDeviceTimerRoutine(
+    PKDPC Dpc,
+    PVOID DeferredContext,
+    PVOID SystemArgument1,
+    PVOID SystemArgument2)
+{
+    FSP_DEVICE_TIMER *Timer;
+    PLIST_ENTRY ListEntry;
+    KIRQL Irql;
+
+    KeAcquireSpinLock(&FspDeviceTimerLock, &Irql);
+    for (ListEntry = FspDeviceTimerList.Flink;
+        &FspDeviceTimerList != ListEntry;
+        ListEntry = ListEntry->Flink)
+    {
+        Timer = CONTAINING_RECORD(ListEntry, FSP_DEVICE_TIMER, ListEntry);
+        Timer->TimerRoutine(Timer->DeviceObject, Timer->Context);
+    }
+    KeReleaseSpinLock(&FspDeviceTimerLock, Irql);
+}
+
+NTSTATUS FspDeviceInitializeTimer(PDEVICE_OBJECT DeviceObject,
+    PIO_TIMER_ROUTINE TimerRoutine, PVOID Context)
+{
+    FSP_DEVICE_EXTENSION *DeviceExtension;
+
+    DeviceExtension = FspDeviceExtension(DeviceObject);
+
+    DeviceExtension->DeviceTimer.TimerRoutine = TimerRoutine;
+    DeviceExtension->DeviceTimer.DeviceObject = DeviceObject;
+    DeviceExtension->DeviceTimer.Context = Context;
+
+    return STATUS_SUCCESS;
+}
+
+VOID FspDeviceStartTimer(PDEVICE_OBJECT DeviceObject)
+{
+    FSP_DEVICE_EXTENSION *DeviceExtension;
+    KIRQL Irql;
+
+    DeviceExtension = FspDeviceExtension(DeviceObject);
+
+    KeAcquireSpinLock(&FspDeviceTimerLock, &Irql);
+    InsertTailList(&FspDeviceTimerList, &DeviceExtension->DeviceTimer.ListEntry);
+    KeReleaseSpinLock(&FspDeviceTimerLock, Irql);
+}
+
+VOID FspDeviceStopTimer(PDEVICE_OBJECT DeviceObject)
+{
+    FSP_DEVICE_EXTENSION *DeviceExtension;
+    KIRQL Irql;
+
+    DeviceExtension = FspDeviceExtension(DeviceObject);
+
+    KeAcquireSpinLock(&FspDeviceTimerLock, &Irql);
+    RemoveEntryList(&DeviceExtension->DeviceTimer.ListEntry);
+    KeReleaseSpinLock(&FspDeviceTimerLock, Irql);
+}