xnu-792.22.5.tar.gz

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

/*
 * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 * 
 * 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.
 * 
 * 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,
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 */

#include <types.h>
#include <console/video_console.h>

extern void bcopy(const void *, void *, size_t);

void video_scroll_up(unsigned long start,
                     unsigned long end,
                     unsigned long dest)
{
    bcopy((void *) start, (void *) dest, (end - start) << 2);
}

void video_scroll_down(unsigned long start,  /* HIGH addr */
                       unsigned long end,    /* LOW addr */
                       unsigned long dest)   /* HIGH addr */
{
    bcopy((void *) end, (void *) dest, (start - end) << 2);
}