osfmk/console/i386/video_scroll.c

   1 /*
   2  * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 #include <types.h>
  25 #include <console/video_console.h>
  26
  27 extern void bcopy(const void *, void *, size_t);
  28
  29 void video_scroll_up(unsigned long start,
  30                      unsigned long end,
  31                      unsigned long dest)
  32 {
  33     bcopy((void *) start, (void *) dest, (end - start) << 2);
  34 }
  35
  36 void video_scroll_down(unsigned long start,  /* HIGH addr */
  37                        unsigned long end,    /* LOW addr */
  38                        unsigned long dest)   /* HIGH addr */
  39 {
  40     bcopy((void *) end, (void *) dest, (start - end) << 2);
  41 }