projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| 1c79356b A |
1 | /* |
| 2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. | |
| 3 | * | |
| 4 | * @APPLE_LICENSE_HEADER_START@ | |
| 5 | * | |
| ff6e181a A |
6 | * This file contains Original Code and/or Modifications of Original Code |
| 7 | * as defined in and that are subject to the Apple Public Source License | |
| 8 | * Version 2.0 (the 'License'). You may not use this file except in | |
| 9 | * compliance with the License. Please obtain a copy of the License at | |
| 10 | * http://www.opensource.apple.com/apsl/ and read it before using this | |
| 11 | * file. | |
| 1c79356b | 12 | * |
| ff6e181a A |
13 | * The Original Code and all software distributed under the License are |
| 14 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| 1c79356b A |
15 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| 16 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| ff6e181a A |
17 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
| 18 | * Please see the License for the specific language governing rights and | |
| 19 | * limitations under the License. | |
| 1c79356b A |
20 | * |
| 21 | * @APPLE_LICENSE_HEADER_END@ | |
| 22 | */ | |
| 23 | /* | |
| 24 | * @OSF_COPYRIGHT_INTERNAL_USE_ONLY@ | |
| 25 | */ | |
| 26 | ||
| 27 | /* | |
| 28 | Performance.s | |
| 29 | ||
| 30 | Handle things that should are related to the hardware performance monitor | |
| 31 | ||
| 32 | Lovingly crafted by Bill Angell using traditional methods and only natural or recycled materials. | |
| 33 | No more than 7500 chinchillas were killed in the production of the code. | |
| 34 | ||
| 35 | */ | |
| 36 | ||
| 37 | #include <ppc/asm.h> | |
| 38 | #include <ppc/proc_reg.h> | |
| 1c79356b A |
39 | #include <ppc/exception.h> |
| 40 | #include <ppc/Performance.h> | |
| 41 | #include <mach/machine/vm_param.h> | |
| 42 | #include <assym.s> | |
| 43 | ||
| 44 | #if PERF_HIST | |
| 45 | /* | |
| 46 | * This routine is used to interface to the performance monitor | |
| 47 | */ | |
| 48 | ||
| 49 | ENTRY(PerfCtl, TAG_NO_FRAME_USED) | |
| 50 | ||
| 51 | lis r0,PerfCtlCall@h /* Get the top part of the SC number */ | |
| 52 | ori r0,r0,PerfCtlCall@l /* and the bottom part */ | |
| 53 | sc /* Do it to it */ | |
| 54 | blr /* Bye bye, Birdie... */ | |
| 55 | ||
| 56 | ||
| 57 | ENTRY(PerfCtlLL, TAG_NO_FRAME_USED) | |
| 58 | ||
| 59 | cmplwi r3,maxPerf /* See if we are within range */ | |
| 60 | mflr r11 /* Get the return point */ | |
| 61 | li r3,0 /* Show failure */ | |
| 62 | bgelrl- /* Load up current address and, also, leave if out of range */ | |
| 63 | prfBase: mflr r12 /* Get our address */ | |
| 64 | rlwinm r10,r3,2,0,31 /* Get displacement into branch table */ | |
| 65 | addi r12,r12,prfBrnch-prfBase /* Point to the branch address */ | |
| 66 | add r12,r12,r10 /* Point to the branch */ | |
| 67 | mtlr r12 /* Get it in the link register */ | |
| 68 | blr /* Vector to the specific performance command... */ | |
| 69 | ||
| 70 | prfBrnch: b prfClear /* Clear the histogram table */ | |
| 71 | b prfStart /* Start the performance monitor */ | |
| 72 | b prfStop /* Stop the performance monitor */ | |
| 73 | b prfMap /* Map the histogram into an address space */ | |
| 74 | .equ maxPerf, (.-prfBrnch)/4 /* Set the highest valid address */ | |
| 75 | ||
| 76 | /* | |
| 77 | * Clear the monitor histogram | |
| 78 | */ | |
| 79 | prfClear: | |
| 80 | li r4,PMIhist@l /* We know this to be in page 0, so no need for the high part */ | |
| 81 | lis r8,PMIHIST_SIZE@h /* Get high half of the table size */ | |
| 82 | lwz r4,0(r4) /* Get the real address of the histgram */ | |
| 83 | ori r8,r8,PMIHIST_SIZE@l /* Get the low half of the table size */ | |
| 84 | li r6,32 /* Get a displacement */ | |
| 85 | li r3,1 /* Set up a good return code */ | |
| 86 | mtlr r11 /* Restore the return address */ | |
| 87 | ||
| 88 | clrloop: subi r8,r8,32 /* Back off a cache line */ | |
| 89 | dcbz 0,r4 /* Do the even line */ | |
| 90 | sub. r8,r8,r6 /* Back off a second time (we only do this to generate a CR */ | |
| 91 | dcbz r6,r4 /* Clear the even line */ | |
| 92 | addi r4,r4,64 /* Move up to every other line */ | |
| 93 | bgt+ clrloop /* Go until we've done it all... */ | |
| 94 | ||
| 95 | blr /* Leave... */ | |
| 96 | ||
| 97 | /* | |
| 98 | * Start the monitor histogram | |
| 99 | */ | |
| 100 | prfStart: | |
| 101 | mtlr r11 /* Restore the return address */ | |
| 102 | blr /* Return... */ | |
| 103 | ||
| 104 | /* | |
| 105 | * Stop the monitor histogram | |
| 106 | */ | |
| 107 | prfStop: | |
| 108 | mtlr r11 /* Restore the return address */ | |
| 109 | blr /* Return... */ | |
| 110 | ||
| 111 | /* | |
| 112 | * Maps the monitor histogram into another address space | |
| 113 | */ | |
| 114 | prfMap: | |
| 115 | mtlr r11 /* Restore the return address */ | |
| 116 | blr /* Return... */ | |
| 117 | ||
| 118 | #endif | |
| 119 |