Implement KD subsystem, add serial & framebuffer debug providers

xtoskrnl/ke/amd64/krnlinit.c

@@ -109,7 +109,6 @@ KepStartKernel(VOID)
     CurrentProcess->ActiveProcessors |= (ULONG_PTR)1 << Prcb->CpuNumber;
 
     /* Enter infinite loop */
-    HlClearScreen(0x7F7F7FFF);
     DebugPrint(L"KepStartKernel() finished. Entering infinite loop.\n");
     for(;;);
 }

xtoskrnl/ke/i686/krnlinit.c

@@ -109,7 +109,6 @@ KepStartKernel(VOID)
     CurrentProcess->ActiveProcessors |= (ULONG_PTR)1 << Prcb->CpuNumber;
 
     /* Enter infinite loop */
-    HlClearScreen(0x7F7F7FFF);
     DebugPrint(L"KepStartKernel() finished. Entering infinite loop.\n");
     for(;;);
 }

xtoskrnl/ke/krnlinit.c

@@ -39,7 +39,21 @@ KeStartXtSystem(IN PKERNEL_INITIALIZATION_BLOCK Parameters)
     if(DEBUG && KeInitializationBlock->LoaderInformation.DbgPrint)
     {
         /* Use loader's provided DbgPrint() routine for early printing to serial console */
-        KeDbgPrint = KeInitializationBlock->LoaderInformation.DbgPrint;
+        KdSetPrintRoutine(KeInitializationBlock->LoaderInformation.DbgPrint);
+        DebugPrint(L"Initializing ExectOS v%d.%d for %s\n", XTOS_VERSION_MAJOR, XTOS_VERSION_MINOR, _ARCH_NAME);
+    }
+
+    /* Initialize boot CPU */
+    ArInitializeProcessor(NULL);
+
+    /* Initialize system resources */
+    KepInitializeSystemResources();
+
+    /* Check if debugging enabled */
+    if(DEBUG)
+    {
+        /* Initialize debug I/O */
+        KdInitializeDebugIoProviders();
     }
 
     /* Announce kernel startup */
@@ -48,12 +62,6 @@ KeStartXtSystem(IN PKERNEL_INITIALIZATION_BLOCK Parameters)
                XTOS_VERSION_BUILD, XTOS_VERSION_ARCH, XTOS_VERSION_HASH,
                XTOS_COMPILER_NAME, XTOS_COMPILER_VERSION);
 
-    /* Initialize boot CPU */
-    ArInitializeProcessor(NULL);
-
-    /* Initialize system resources */
-    KepInitializeSystemResources();
-
     /* Architecture specific kernel initialization */
     KepInitializeMachine();
 

xtoskrnl/ke/panic.c

@@ -76,6 +76,6 @@ KePanicEx(IN ULONG Code,
           IN ULONG_PTR Parameter3,
           IN ULONG_PTR Parameter4)
 {
-    KeDbgPrint(L"Fatal System Error: 0x%08lx\nKernel Panic!\n\n", Code);
+    KdPrint(L"Fatal System Error: 0x%08lx\nKernel Panic!\n\n", Code);
     KeHaltSystem();
 }