xnu-517.tar.gz

[apple/xnu.git] / osfmk / console / i386 / kdasm.s

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
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 * @APPLE_LICENSE_HEADER_START@
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 * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
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 * 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
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 * http://www.opensource.apple.com/apsl/ and read it before using this
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 * Please see the License for the specific language governing rights and
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 * @APPLE_LICENSE_HEADER_END@
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/* CMU_ENDHIST */
/* 
 * Mach Operating System
 * Copyright (c) 1991,1990,1989 Carnegie Mellon University
 * All Rights Reserved.
 * 
 * Permission to use, copy, modify and distribute this software and its
 * documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 * 
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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 * Carnegie Mellon requests users of this software to return to
 * 
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 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
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 * any improvements or extensions that they make and grant Carnegie Mellon
 * the rights to redistribute these changes.
 */
/* 
 */
 
/* 
 * Some inline code to speed up major block copies to and from the
 * screen buffer.
 * 
 * Copyright Ing. C. Olivetti & C. S.p.A. 1988, 1989.
 *  All rights reserved.
 *
 * orc!eugene	28 Oct 1988
 *
 */
/*
 *   Copyright 1988, 1989 by Olivetti Advanced Technology Center, Inc.,
 * Cupertino, California.
 * 
 * 		All Rights Reserved
 * 
 *   Permission to use, copy, modify, and distribute this software and
 * its documentation for any purpose and without fee is hereby
 * granted, provided that the above copyright notice appears in all
 * copies and that both the copyright notice and this permission notice
 * appear in supporting documentation, and that the name of Olivetti
 * not be used in advertising or publicity pertaining to distribution
 * of the software without specific, written prior permission.
 * 
 *   OLIVETTI DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS,
 * IN NO EVENT SHALL OLIVETTI BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
 * LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
 * NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUR OF OR IN CONNECTION
 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

/* $ Header: $ */

 

/*
 * Function:	kd_slmwd()
 *
 *	This function "slams" a word (char/attr) into the screen memory using
 *	a block fill operation on the 386.
 *
 */

#define start 0x08(%ebp)
#define count 0x0c(%ebp)
#define value 0x10(%ebp)

	.text
	.align	2
	.globl	_kd_slmwd

_kd_slmwd:
	pushl	%ebp
	movl	%esp, %ebp
	pushl	%edi

	movl	start, %edi
	movl	count, %ecx
	movw	value, %ax
	cld
	rep
	stosw

	popl	%edi
	leave
	ret
#undef start
#undef count
#undef value

/*
 * "slam up"
 */

#define from  0x08(%ebp)
#define to    0x0c(%ebp)
#define count 0x10(%ebp)
	.align	2
	.globl	_kd_slmscu

_kd_slmscu:
	pushl	%ebp
	movl	%esp, %ebp
	pushl	%esi
	pushl	%edi

	movl	from, %esi
	movl	to, %edi
	movl	count, %ecx
	cmpl	%edi, %esi
	cld
	rep
	movsw

	popl	%edi
	popl	%esi
	leave
	ret

/*
 * "slam down"
 */
	.align	2
	.globl	_kd_slmscd

_kd_slmscd:
	pushl	%ebp
	movl	%esp, %ebp
	pushl	%esi
	pushl	%edi

	movl	from, %esi
	movl	to, %edi
	movl	count, %ecx
	cmpl	%edi, %esi
	std
	rep
	movsw
	cld

	popl	%edi
	popl	%esi
	leave
	ret
#undef from
#undef to
#undef count