xnu-792.6.56.tar.gz

[apple/xnu.git] / pexpert / ppc / pe_misc.s

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_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. 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, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
#include <mach/ppc/asm.h>

/* 
**      PE_get_timebase()
** 
**      Entry   - R3 contains pointer to 64 bit structure.
**
**      Exit    - 64 bit structure filled in.
**
*/
ENTRY(PE_get_timebase, TAG_NO_FRAME_USED)
loop:
        mftbu   r4
        mftb    r5
        mftbu   r6
        cmpw    r6, r4
        bne     loop
   
        stw     r4, 0(r3)
        stw     r5, 4(r3)

        blr