projects / apple / libc.git / blame
| Commit | Line | Data |
|---|---|---|
| e9ce8d39 | 1 | /* |
| 224c7076 A |
2 | * Copyright (c) 2007 Apple Inc. All rights reserved. |
| 3 | * Copyright (c) 2003-2006 Apple Computer, Inc. All rights reserved. | |
| e9ce8d39 A |
4 | * |
| 5 | * @APPLE_LICENSE_HEADER_START@ | |
| 6 | * | |
| 734aad71 A |
7 | * This file contains Original Code and/or Modifications of Original Code |
| 8 | * as defined in and that are subject to the Apple Public Source License | |
| 9 | * Version 2.0 (the 'License'). You may not use this file except in | |
| 10 | * compliance with the License. Please obtain a copy of the License at | |
| 11 | * http://www.opensource.apple.com/apsl/ and read it before using this | |
| 12 | * file. | |
| 13 | * | |
| 14 | * The Original Code and all software distributed under the License are | |
| 15 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| e9ce8d39 A |
16 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| 17 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 734aad71 A |
18 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
| 19 | * Please see the License for the specific language governing rights and | |
| 20 | * limitations under the License. | |
| e9ce8d39 A |
21 | * |
| 22 | * @APPLE_LICENSE_HEADER_END@ | |
| 23 | */ | |
| 224c7076 A |
24 | |
| 25 | ||
| 26 | #include <machine/cpu_capabilities.h> | |
| 27 | ||
| 28 | ||
| 9385eb3d A |
29 | .text |
| 30 | .align 4, 0x00 | |
| e9ce8d39 | 31 | |
| 9385eb3d | 32 | /* void sys_icache_invalidate(addr_t start, int length) */ |
| 224c7076 | 33 | |
| 1f2f436a | 34 | .globl _sys_icache_invalidate |
| 9385eb3d | 35 | _sys_icache_invalidate: |
| 1f2f436a A |
36 | // This is a NOP on intel processors, since the intent of the API |
| 37 | // is to make data executable, and Intel L1Is are coherent with L1D. | |
| 38 | ret | |
| 224c7076 A |
39 | |
| 40 | ||
| 41 | /* void sys_dcache_flush(addr_t start, int length) */ | |
| 42 | ||
| 1f2f436a | 43 | .globl _sys_dcache_flush |
| 224c7076 | 44 | _sys_dcache_flush: |
| 1f2f436a A |
45 | movl 8(%esp),%ecx // get length |
| 46 | movl 4(%esp),%edx // get ptr | |
| 47 | testl %ecx,%ecx // length 0? | |
| 48 | jz 2f // yes | |
| 49 | mfence // ensure previous stores make it to memory | |
| 50 | clflush -1(%edx,%ecx) // make sure last line is flushed | |
| 51 | 1: | |
| 52 | clflush (%edx) // flush a line | |
| 53 | addl $64,%edx | |
| 54 | subl $64,%ecx | |
| 55 | ja 1b | |
| 56 | mfence // make sure memory is updated before we return | |
| 57 | 2: | |
| 58 | ret |