Initialize the UEFI console

xtldr2/CMakeLists.txt

@@ -8,6 +8,7 @@ include_directories(
 
 # Specify list of source code files
 list(APPEND XTLDR_SOURCE
+    ${XTLDR_SOURCE_DIR}/console.c
     ${XTLDR_SOURCE_DIR}/globals.c
     ${XTLDR_SOURCE_DIR}/xtldr.c)
 

xtldr2/console.c

@@ -0,0 +1,48 @@
+/**
+ * PROJECT:         ExectOS
+ * COPYRIGHT:       See COPYING.md in the top level directory
+ * FILE:            xtldr/console.c
+ * DESCRIPTION:     EFI console support
+ * DEVELOPERS:      Rafal Kupiec <belliash@codingworkshop.eu.org>
+ */
+
+#include <xtbm.h>
+
+
+/**
+ * This routine clears the UEFI console screen.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTCDECL
+VOID
+BmClearScreen()
+{
+    /* Clear screen */
+    EfiSystemTable->ConOut->ClearScreen(EfiSystemTable->ConOut);
+}
+
+/**
+ * This routine initializes the EFI console.
+ *
+ * @return This routine returns status code.
+ *
+ * @since XT 1.0
+ */
+XTCDECL
+VOID
+BmInitializeConsole()
+{
+    /* Clear console buffers */
+    EfiSystemTable->ConIn->Reset(EfiSystemTable->ConIn, TRUE);
+    EfiSystemTable->ConOut->Reset(EfiSystemTable->ConOut, TRUE);
+    EfiSystemTable->StdErr->Reset(EfiSystemTable->StdErr, TRUE);
+
+    /* Clear screen */
+    BmClearScreen();
+
+    /* Enable cursor */
+    EfiSystemTable->ConOut->EnableCursor(EfiSystemTable->ConOut, TRUE);
+}

xtldr2/includes/xtbm.h

@@ -21,6 +21,14 @@ EXTERN PEFI_SYSTEM_TABLE EfiSystemTable;
 
 
 /* XTLDR routines forward references */
+XTCDECL
+VOID
+BmClearScreen();
+
+XTCDECL
+VOID
+BmInitializeConsole();
+
 XTCDECL
 EFI_STATUS
 BmStartXtLoader(IN EFI_HANDLE ImageHandle,

xtldr2/xtldr.c

@@ -33,6 +33,9 @@ BmStartXtLoader(IN EFI_HANDLE ImageHandle,
     EfiImageHandle = ImageHandle;
     EfiSystemTable = SystemTable;
 
+    /* Initialize UEFI console */
+    BmInitializeConsole();
+
     /* This point should be never reached, if this happen return error code */
     return STATUS_EFI_LOAD_ERROR;
 }