projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| 55e303ae A |
1 | /* |
| 2 | * Copyright (c) 2003 Apple Computer, Inc. All rights reserved. | |
| 3 | * | |
| 4 | * @APPLE_LICENSE_HEADER_START@ | |
| 5 | * | |
| 6 | * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved. | |
| 7 | * | |
| 8 | * This file contains Original Code and/or Modifications of Original Code | |
| 9 | * as defined in and that are subject to the Apple Public Source License | |
| 10 | * Version 2.0 (the 'License'). You may not use this file except in | |
| 11 | * compliance with the License. Please obtain a copy of the License at | |
| 12 | * http://www.opensource.apple.com/apsl/ and read it before using this | |
| 13 | * file. | |
| 14 | * | |
| 15 | * The Original Code and all software distributed under the License are | |
| 16 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| 17 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, | |
| 18 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 19 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. | |
| 20 | * Please see the License for the specific language governing rights and | |
| 21 | * limitations under the License. | |
| 22 | * | |
| 23 | * @APPLE_LICENSE_HEADER_END@ | |
| 24 | */ | |
| 25 | ||
| 26 | #define ASSEMBLER | |
| 27 | #include <sys/appleapiopts.h> | |
| 28 | #include <ppc/asm.h> // EXT, LEXT | |
| 29 | #include <machine/cpu_capabilities.h> | |
| 30 | #include <machine/commpage.h> | |
| 31 | ||
| 32 | .text | |
| 33 | .align 2 | |
| 34 | .globl EXT(mach_absolute_time_32) | |
| 35 | .globl EXT(mach_absolute_time_64) | |
| 36 | ||
| 37 | ||
| 38 | // ********************************************* | |
| 39 | // * M A C H _ A B S O L U T E _ T I M E _ 3 2 * | |
| 40 | // ********************************************* | |
| 41 | ||
| 42 | mach_absolute_time_32: | |
| 43 | 1: | |
| 44 | mftbu r3 | |
| 45 | mftb r4 | |
| 46 | mftbu r5 | |
| 47 | cmplw r3,r5 | |
| 48 | beqlr+ | |
| 49 | b 1b | |
| 50 | ||
| 51 | COMMPAGE_DESCRIPTOR(mach_absolute_time_32,_COMM_PAGE_ABSOLUTE_TIME,0,k64Bit,0) | |
| 52 | ||
| 53 | ||
| 54 | // ********************************************* | |
| 55 | // * M A C H _ A B S O L U T E _ T I M E _ 6 4 * | |
| 56 | // ********************************************* | |
| 57 | // | |
| 58 | // Why bother to special case for 64-bit? Because the "mftb" variants | |
| 59 | // are 10 cycles each, and they are serialized. | |
| 60 | ||
| 61 | mach_absolute_time_64: | |
| 62 | mftb r4 | |
| 63 | srdi r3,r4,32 | |
| 64 | blr | |
| 65 | ||
| 66 | COMMPAGE_DESCRIPTOR(mach_absolute_time_64,_COMM_PAGE_ABSOLUTE_TIME,k64Bit,0,0) | |
| 67 | ||
| 68 |