projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| 1c79356b A |
1 | /* |
| 2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. | |
| 3 | * | |
| 6601e61a | 4 | * @APPLE_LICENSE_HEADER_START@ |
| 1c79356b | 5 | * |
| 6601e61a 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. | |
| 8f6c56a5 | 11 | * |
| 6601e61a 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 | |
| 8f6c56a5 A |
14 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| 15 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 6601e61a A |
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@ |
| 1c79356b A |
21 | */ |
| 22 | /* | |
| 23 | * @OSF_COPYRIGHT_INTERNAL_USE_ONLY@ | |
| 24 | */ | |
| 25 | ||
| 26 | /* | |
| 27 | Performance.s | |
| 28 | ||
| 29 | Handle things that should are related to the hardware performance monitor | |
| 30 | ||
| 31 | Lovingly crafted by Bill Angell using traditional methods and only natural or recycled materials. | |
| 32 | No more than 7500 chinchillas were killed in the production of the code. | |
| 33 | ||
| 34 | */ | |
| 35 | ||
| 36 | #include <ppc/asm.h> | |
| 37 | #include <ppc/proc_reg.h> | |
| 1c79356b A |
38 | #include <ppc/exception.h> |
| 39 | #include <ppc/Performance.h> | |
| 40 | #include <mach/machine/vm_param.h> | |
| 41 | #include <assym.s> | |
| 42 | ||
| 43 | #if PERF_HIST | |
| 44 | /* | |
| 45 | * This routine is used to interface to the performance monitor | |
| 46 | */ | |
| 47 | ||
| 48 | ENTRY(PerfCtl, TAG_NO_FRAME_USED) | |
| 49 | ||
| 50 | lis r0,PerfCtlCall@h /* Get the top part of the SC number */ | |
| 51 | ori r0,r0,PerfCtlCall@l /* and the bottom part */ | |
| 52 | sc /* Do it to it */ | |
| 53 | blr /* Bye bye, Birdie... */ | |
| 54 | ||
| 55 | ||
| 56 | ENTRY(PerfCtlLL, TAG_NO_FRAME_USED) | |
| 57 | ||
| 58 | cmplwi r3,maxPerf /* See if we are within range */ | |
| 59 | mflr r11 /* Get the return point */ | |
| 60 | li r3,0 /* Show failure */ | |
| 61 | bgelrl- /* Load up current address and, also, leave if out of range */ | |
| 62 | prfBase: mflr r12 /* Get our address */ | |
| 63 | rlwinm r10,r3,2,0,31 /* Get displacement into branch table */ | |
| 64 | addi r12,r12,prfBrnch-prfBase /* Point to the branch address */ | |
| 65 | add r12,r12,r10 /* Point to the branch */ | |
| 66 | mtlr r12 /* Get it in the link register */ | |
| 67 | blr /* Vector to the specific performance command... */ | |
| 68 | ||
| 69 | prfBrnch: b prfClear /* Clear the histogram table */ | |
| 70 | b prfStart /* Start the performance monitor */ | |
| 71 | b prfStop /* Stop the performance monitor */ | |
| 72 | b prfMap /* Map the histogram into an address space */ | |
| 73 | .equ maxPerf, (.-prfBrnch)/4 /* Set the highest valid address */ | |
| 74 | ||
| 75 | /* | |
| 76 | * Clear the monitor histogram | |
| 77 | */ | |
| 78 | prfClear: | |
| 79 | li r4,PMIhist@l /* We know this to be in page 0, so no need for the high part */ | |
| 80 | lis r8,PMIHIST_SIZE@h /* Get high half of the table size */ | |
| 81 | lwz r4,0(r4) /* Get the real address of the histgram */ | |
| 82 | ori r8,r8,PMIHIST_SIZE@l /* Get the low half of the table size */ | |
| 83 | li r6,32 /* Get a displacement */ | |
| 84 | li r3,1 /* Set up a good return code */ | |
| 85 | mtlr r11 /* Restore the return address */ | |
| 86 | ||
| 87 | clrloop: subi r8,r8,32 /* Back off a cache line */ | |
| 88 | dcbz 0,r4 /* Do the even line */ | |
| 89 | sub. r8,r8,r6 /* Back off a second time (we only do this to generate a CR */ | |
| 90 | dcbz r6,r4 /* Clear the even line */ | |
| 91 | addi r4,r4,64 /* Move up to every other line */ | |
| 92 | bgt+ clrloop /* Go until we've done it all... */ | |
| 93 | ||
| 94 | blr /* Leave... */ | |
| 95 | ||
| 96 | /* | |
| 97 | * Start the monitor histogram | |
| 98 | */ | |
| 99 | prfStart: | |
| 100 | mtlr r11 /* Restore the return address */ | |
| 101 | blr /* Return... */ | |
| 102 | ||
| 103 | /* | |
| 104 | * Stop the monitor histogram | |
| 105 | */ | |
| 106 | prfStop: | |
| 107 | mtlr r11 /* Restore the return address */ | |
| 108 | blr /* Return... */ | |
| 109 | ||
| 110 | /* | |
| 111 | * Maps the monitor histogram into another address space | |
| 112 | */ | |
| 113 | prfMap: | |
| 114 | mtlr r11 /* Restore the return address */ | |
| 115 | blr /* Return... */ | |
| 116 | ||
| 117 | #endif | |
| 118 |