Implement KD subsystem, add serial & framebuffer debug providers

xtoskrnl/includes/globals.h

@@ -36,8 +36,24 @@ EXTERN HL_SCROLL_REGION_DATA HlpScrollRegionData;
 /* System information */
 EXTERN ACPI_SYSTEM_INFO HlpSystemInfo;
 
-/* Pointer to boot loader provided DbgPrint() routine */
-EXTERN VOID (*KeDbgPrint)(IN PCWSTR Format, IN ...);
+/* Pointer to DbgPrint() routine */
+EXTERN PKD_PRINT_ROUTINE KdPrint;
+
+/* Kernel Debugger mode */
+EXTERN KD_DEBUG_MODE KdpDebugMode;
+
+/* Debugger I/O providers initialization routines */
+EXTERN PKD_INIT_ROUTINE KdpIoProvidersInitRoutines[KDBG_PROVIDERS_COUNT];
+
+/* List of active I/O providers */
+EXTERN LIST_ENTRY KdpProviders;
+
+/* Debugger's serial port handle */
+EXTERN CPPORT KdpSerialPort;
+
+/* Pre-defined serial port addresses */
+EXTERN ULONG KdpSerialPortList[COMPORT_COUNT];
+
 
 /* Kernel initialization block passed by boot loader */
 EXTERN PKERNEL_INITIALIZATION_BLOCK KeInitializationBlock;

xtoskrnl/includes/kdi.h

@@ -0,0 +1,44 @@
+/**
+ * PROJECT:         ExectOS
+ * COPYRIGHT:       See COPYING.md in the top level directory
+ * FILE:            xtoskrnl/includes/kdi.h
+ * DESCRIPTION:     Kernel Debugger routines
+ * DEVELOPERS:      Aiken Harris <harraiken91@gmail.com>
+ */
+
+#ifndef __XTOSKRNL_KDI_H
+#define __XTOSKRNL_KDI_H
+
+#include <xtos.h>
+
+
+/* Kernel Debugger routines forward references */
+XTAPI
+XTSTATUS
+KdInitializeDebugIoProviders(VOID);
+
+XTAPI
+VOID
+KdSetPrintRoutine(PVOID DebugPrintRoutine);
+
+XTCDECL
+VOID
+KdpDebugPrint(PCWSTR Format, ...);
+
+XTAPI
+XTSTATUS
+KdpDetectDebugPorts(VOID);
+
+XTAPI
+XTSTATUS
+KdpInitializeFrameBufferProvider(VOID);
+
+XTAPI
+XTSTATUS
+KdpInitializeSerialPortProvider(VOID);
+
+XTCDECL
+XTSTATUS
+KdpSerialWriteCharacter(WCHAR Character);
+
+#endif /* __XTOSKRNL_KDI_H */

xtoskrnl/includes/xtos.h

@@ -15,6 +15,7 @@
 /* Kernel specific headers */
 #include "globals.h"
 #include "hli.h"
+#include "kdi.h"
 #include "kei.h"
 #include "mmi.h"
 #include "poi.h"