osfmk/ppc/commpage/mach_absolute_time.s

   1 /*
   2  * Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22
  23 #define ASSEMBLER
  24 #include <sys/appleapiopts.h>
  25 #include <ppc/asm.h>                                    // EXT, LEXT
  26 #include <machine/cpu_capabilities.h>
  27 #include <machine/commpage.h>
  28
  29         .text
  30         .align  2
  31
  32
  33 // *********************************************
  34 // * M A C H _ A B S O L U T E _ T I M E _ 3 2 *
  35 // *********************************************
  36
  37 mach_absolute_time_32:
  38 1:
  39         mftbu   r3
  40         mftb    r4
  41         mftbu   r5
  42         cmplw   r3,r5
  43         beqlr+
  44         b               1b
  45
  46         COMMPAGE_DESCRIPTOR(mach_absolute_time_32,_COMM_PAGE_ABSOLUTE_TIME,0,k64Bit,kCommPage32)
  47
  48
  49 // *********************************************
  50 // * M A C H _ A B S O L U T E _ T I M E _ 6 4 *
  51 // *********************************************
  52 //
  53 // This is the version that is called in 32-bit mode, so we return the TBR in r3 and r4.
  54
  55 mach_absolute_time_64:
  56         mftb    r4
  57         srdi    r3,r4,32
  58         blr
  59
  60         COMMPAGE_DESCRIPTOR(mach_absolute_time_64,_COMM_PAGE_ABSOLUTE_TIME,k64Bit,0,kCommPage32)
  61
  62
  63 // *************************************************
  64 // * M A C H _ A B S O L U T E _ T I M E _ L P 6 4 *
  65 // *************************************************
  66 //
  67 // This is the version that is called in 64-bit mode, so we return the TBR in r3.
  68
  69 mach_absolute_time_lp64:
  70         mftb    r3
  71         blr
  72
  73         COMMPAGE_DESCRIPTOR(mach_absolute_time_lp64,_COMM_PAGE_ABSOLUTE_TIME,k64Bit,0,kCommPage64)
  74
  75