projects / apple / xnu.git / blame
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|---|---|---|
| 55e303ae A |
1 | /* |
| 2 | * Copyright (c) 2003 Apple Computer, Inc. All rights reserved. | |
| 3 | * | |
| 4 | * @APPLE_LICENSE_HEADER_START@ | |
| 5 | * | |
| e5568f75 A |
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. | |
| 55e303ae | 11 | * |
| e5568f75 A |
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 | |
| 55e303ae A |
14 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| 15 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
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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. | |
| 55e303ae A |
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 | .globl EXT(mach_absolute_time_32) | |
| 32 | .globl EXT(mach_absolute_time_64) | |
| 33 | ||
| 34 | ||
| 35 | // ********************************************* | |
| 36 | // * M A C H _ A B S O L U T E _ T I M E _ 3 2 * | |
| 37 | // ********************************************* | |
| 38 | ||
| 39 | mach_absolute_time_32: | |
| 40 | 1: | |
| 41 | mftbu r3 | |
| 42 | mftb r4 | |
| 43 | mftbu r5 | |
| 44 | cmplw r3,r5 | |
| 45 | beqlr+ | |
| 46 | b 1b | |
| 47 | ||
| 48 | COMMPAGE_DESCRIPTOR(mach_absolute_time_32,_COMM_PAGE_ABSOLUTE_TIME,0,k64Bit,0) | |
| 49 | ||
| 50 | ||
| 51 | // ********************************************* | |
| 52 | // * M A C H _ A B S O L U T E _ T I M E _ 6 4 * | |
| 53 | // ********************************************* | |
| 54 | // | |
| 55 | // Why bother to special case for 64-bit? Because the "mftb" variants | |
| 56 | // are 10 cycles each, and they are serialized. | |
| 57 | ||
| 58 | mach_absolute_time_64: | |
| 59 | mftb r4 | |
| 60 | srdi r3,r4,32 | |
| 61 | blr | |
| 62 | ||
| 63 | COMMPAGE_DESCRIPTOR(mach_absolute_time_64,_COMM_PAGE_ABSOLUTE_TIME,k64Bit,0,0) | |
| 64 | ||
| 65 |