Initial Deferred Procedure Call (DPC) support

sdk/xtdk/ketypes.h

@@ -75,6 +75,15 @@ typedef enum _KAPC_ENVIRONMENT
     InsertApcEnvironment
 } KAPC_ENVIRONMENT, *PKAPC_ENVIRONMENT;
 
+/* DPC importance enumeration list */
+typedef enum _KDPC_IMPORTANCE
+{
+    LowImportance,
+    MediumImportance,
+    HighImportance,
+    MediumHighImportance
+} KDPC_IMPORTANCE, *PKDPC_IMPORTANCE;
+
 /* Kernel objects */
 typedef enum _KOBJECTS
 {

sdk/xtdk/xtstruct.h

@@ -39,6 +39,7 @@ typedef enum _EFI_UART_PARITY_TYPE EFI_UART_PARITY_TYPE, *PEFI_UART_PARITY_TYPE;
 typedef enum _EFI_UART_STOP_BITS_TYPE EFI_UART_STOP_BITS_TYPE, *PEFI_UART_STOP_BITS_TYPE;
 typedef enum _EFI_UNIVERSA_GRAPHICS_BLT_OPERATION EFI_UNIVERSA_GRAPHICS_BLT_OPERATION, *PEFI_UNIVERSA_GRAPHICS_BLT_OPERATION;
 typedef enum _KAPC_ENVIRONMENT KAPC_ENVIRONMENT, *PKAPC_ENVIRONMENT;
+typedef enum _KDPC_IMPORTANCE KDPC_IMPORTANCE, *PKDPC_IMPORTANCE;
 typedef enum _KOBJECTS KOBJECTS, *PKOBJECTS;
 typedef enum _KPROCESS_STATE KPROCESS_STATE, *PKPROCESS_STATE;
 typedef enum _KTHREAD_STATE KTHREAD_STATE, *PKTHREAD_STATE;

xtoskrnl/CMakeLists.txt

@@ -17,6 +17,7 @@ list(APPEND XTOSKRNL_SOURCE
     ${XTOSKRNL_SOURCE_DIR}/hl/globals.c
     ${XTOSKRNL_SOURCE_DIR}/hl/${ARCH}/ioport.c
     ${XTOSKRNL_SOURCE_DIR}/ke/apc.c
+    ${XTOSKRNL_SOURCE_DIR}/ke/dpc.c
     ${XTOSKRNL_SOURCE_DIR}/ke/globals.c
     ${XTOSKRNL_SOURCE_DIR}/ke/kprocess.c
     ${XTOSKRNL_SOURCE_DIR}/ke/krnlinit.c

xtoskrnl/ke/dpc.c

@@ -0,0 +1,60 @@
+/**
+ * PROJECT:         ExectOS
+ * COPYRIGHT:       See COPYING.md in the top level directory
+ * FILE:            xtoskrnl/ke/dpc.c
+ * DESCRIPTION:     Deferred Procedure Call (DPC) support
+ * DEVELOPERS:      Rafal Kupiec <belliash@codingworkshop.eu.org>
+ */
+
+#include <xtos.h>
+
+
+/**
+ * Initializes Deferred Procedure Call (DPC) object.
+ *
+ * @param Dpc
+ *        Supplies a pointer to the DPC being initialized.
+ *
+ * @param DpcRoutine
+ *        Supplies a pointer to the DPC routine being called on object removal.
+ *
+ * @param DpcContext
+ *        Supplies a pointer to memory area containing context data for DPC routine.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since NT 3.5
+ */
+XTAPI
+VOID
+KeInitializeDpc(IN PKDPC Dpc,
+                IN PKDEFERRED_ROUTINE DpcRoutine,
+                IN PVOID DpcContext)
+{
+    /* Initialize DPC */
+    Dpc->Type = DpcObject;
+    Dpc->Number = 0;
+    Dpc->Importance = MediumImportance;
+
+    /* Initialize DPC routine and context data */
+    Dpc->DeferredContext = DpcContext;
+    Dpc->DeferredRoutine = DpcRoutine;
+    Dpc->DpcData = NULL;
+}
+
+/**
+ * Retires the expired DPC objects found in the DPC list.
+ *
+ * @param Prcb
+ *        Supplies apointer to the Prcessor Control Block (PRCB).
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTFASTCALL
+VOID
+KepRetireDpcList(IN PKPROCESSOR_CONTROL_BLOCK Prcb)
+{
+    UNIMPLEMENTED;
+}