xnu-792.22.5.tar.gz

[apple/xnu.git] / osfmk / console / i386 / text_console.c

diff --git a/osfmk/console/i386/text_console.c b/osfmk/console/i386/text_console.c
index a5b7cad905471944e9157c1e68e3398143c50be5..ba0fc3392632ac2069b994d4fe0df43a426c7f31 100644 (file)
--- a/osfmk/console/i386/text_console.c
+++ b/osfmk/console/i386/text_console.c
@@ -1,23 +1,29 @@
 /*
  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
  *
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
  * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
  * 
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 
 /*
@@ -26,7 +32,7 @@
  * VGA text console support.
  */
 
-#include <i386/pio.h>
+#include <architecture/i386/pio.h>
 #include <console/video_console.h>
 #include "text_console.h"
 
@@ -98,6 +104,7 @@ move_up( csrpos_t  from,
          csrpos_t  to,
          int       count)
 {
+    if (vram_start == 0) return;
     kd_slmscu( vram_start + from, vram_start + to, count );
 }
 
@@ -111,6 +118,7 @@ move_down( csrpos_t  from,
            csrpos_t  to,
            int       count )
 {
+    if (vram_start == 0) return;
     kd_slmscd( vram_start + from, vram_start + to, count );
 }
 
@@ -124,6 +132,7 @@ clear_block( csrpos_t  start,
              int       size,
              char      attr)
 {
+    if (vram_start == 0) return;
     kd_slmwd( vram_start + start, size,
               ((unsigned short) attr << 8) + SPACE_CHAR);
 }
@@ -171,6 +180,7 @@ display_char( csrpos_t    pos,      /* where to put it */
               char        ch,       /* the character */
               char        attr )    /* its attribute */
 {
+    if (vram_start == 0) return;
     *(vram_start + pos)     = ch;
     *(vram_start + pos + 1) = attr;
 }