projects / apple / xnu.git / blame
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1 | /* |
| 2 | * Copyright (c) 2003 Apple Computer, Inc. All rights reserved. | |
| 3 | * | |
| 6601e61a | 4 | * @APPLE_LICENSE_HEADER_START@ |
| 55e303ae | 5 | * |
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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. | |
| 8f6c56a5 | 11 | * |
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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 | |
| 8f6c56a5 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. | |
| 8f6c56a5 | 19 | * |
| 6601e61a | 20 | * @APPLE_LICENSE_HEADER_END@ |
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21 | */ |
| 22 | ||
| 23 | #include <sys/appleapiopts.h> | |
| 24 | #include <ppc/asm.h> // EXT, LEXT | |
| 25 | #include <machine/cpu_capabilities.h> | |
| 26 | #include <machine/commpage.h> | |
| 27 | ||
| 28 | .text | |
| 29 | .align 2 | |
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30 | |
| 31 | #define USER_SPRG3 259 // user-mode-readable encoding for SPRG3 | |
| 32 | ||
| 33 | ||
| 91447636 A |
34 | // *********************************************************** |
| 35 | // * P T H R E A D _ G E T S P E C I F I C _ S P R G 3 _ 3 2 * | |
| 36 | // *********************************************************** | |
| 55e303ae | 37 | // |
| 91447636 | 38 | // For processors with user-readable SPRG3, in 32-bit mode. Called with: |
| 55e303ae A |
39 | // r3 = word number |
| 40 | // r4 = offset to thread specific data (_PTHREAD_TSD_OFFSET) | |
| 41 | ||
| 91447636 | 42 | pthread_getspecific_sprg3_32: |
| 55e303ae A |
43 | slwi r5,r3,2 // convert word# to byte offset |
| 44 | mfspr r3,USER_SPRG3 // get per-thread cookie | |
| 45 | add r5,r5,r4 // add in offset to first word | |
| 46 | lwzx r3,r3,r5 // get the thread-specific word | |
| 47 | blr | |
| 48 | ||
| 91447636 A |
49 | COMMPAGE_DESCRIPTOR(pthread_getspecific_sprg3_32,_COMM_PAGE_PTHREAD_GETSPECIFIC,k64Bit,0,kCommPage32) |
| 50 | ||
| 51 | ||
| 52 | // *********************************************************** | |
| 53 | // * P T H R E A D _ G E T S P E C I F I C _ S P R G 3 _ 6 4 * | |
| 54 | // *********************************************************** | |
| 55 | // | |
| 56 | // For processors with user-readable SPRG3, in 64-bit mode. This may not be used | |
| 57 | // because the 64-bit ABI uses r13 for the thread-local-data pointer. Called with: | |
| 58 | // r3 = word number | |
| 59 | // r4 = offset to thread specific data (_PTHREAD_TSD_OFFSET) | |
| 60 | ||
| 61 | pthread_getspecific_sprg3_64: | |
| 62 | sldi r5,r3,3 // convert double-word# to byte offset | |
| 63 | mfspr r3,USER_SPRG3 // get per-thread cookie | |
| 64 | add r5,r5,r4 // add in offset to first word | |
| 65 | ldx r3,r3,r5 // get the thread-specific doubleword | |
| 66 | blr | |
| 67 | ||
| 68 | COMMPAGE_DESCRIPTOR(pthread_getspecific_sprg3_64,_COMM_PAGE_PTHREAD_GETSPECIFIC,k64Bit,0,kCommPage64) | |
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69 | |
| 70 | ||
| 71 | // *************************************** | |
| 72 | // * P T H R E A D _ S E L F _ S P R G 3 * | |
| 73 | // *************************************** | |
| 74 | // | |
| 91447636 | 75 | // For processors with user-readable SPRG3. Useable both in 32 and 64-bit modes. |
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76 | |
| 77 | pthread_self_sprg3: | |
| 78 | mfspr r3,USER_SPRG3 // get per-thread cookie | |
| 79 | blr | |
| 80 | ||
| 91447636 | 81 | COMMPAGE_DESCRIPTOR(pthread_self_sprg3,_COMM_PAGE_PTHREAD_SELF,k64Bit,0,kCommPageBoth) |
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82 | |
| 83 | ||
| 84 | // ******************************************************* | |
| 85 | // * P T H R E A D _ G E T S P E C I F I C _ U F T R A P * | |
| 86 | // ******************************************************* | |
| 87 | // | |
| 88 | // For processors that use the Ultra-Fast-Trap to get the thread-specific ptr. | |
| 89 | // Called with: | |
| 90 | // r3 = word number | |
| 91 | // r4 = offset to thread specific data (_PTHREAD_TSD_OFFSET) | |
| 92 | ||
| 93 | pthread_getspecific_uftrap: | |
| 94 | slwi r5,r3,2 // convert word# to byte offset | |
| 95 | li r0,0x7FF2 // magic "pthread_self" ultra-fast trap code | |
| 96 | sc | |
| 97 | add r5,r5,r4 // add in offset to first word | |
| 98 | lwzx r3,r3,r5 // get the thread-specific word | |
| 99 | blr | |
| 100 | ||
| 91447636 | 101 | COMMPAGE_DESCRIPTOR(pthread_getspecific_uftrap,_COMM_PAGE_PTHREAD_GETSPECIFIC,0,k64Bit,kCommPage32) |
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102 | |
| 103 | ||
| 104 | // ***************************************** | |
| 105 | // * P T H R E A D _ S E L F _ U F T R A P * | |
| 106 | // ***************************************** | |
| 107 | // | |
| 108 | // For processors that use the Ultra-Fast-Trap to get the thread-specific ptr. | |
| 109 | ||
| 110 | pthread_self_uftrap: | |
| 111 | li r0,0x7FF2 // magic "pthread_self" ultra-fast trap code | |
| 112 | sc // get r3==TLDP | |
| 113 | blr | |
| 114 | ||
| 91447636 | 115 | COMMPAGE_DESCRIPTOR(pthread_self_uftrap,_COMM_PAGE_PTHREAD_SELF,0,k64Bit,kCommPage32) |