| | 1 | /* |
| | 2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. |
| | 3 | * |
| | 4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
| | 5 | * |
| | 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. The rights granted to you under the License |
| | 10 | * may not be used to create, or enable the creation or redistribution of, |
| | 11 | * unlawful or unlicensed copies of an Apple operating system, or to |
| | 12 | * circumvent, violate, or enable the circumvention or violation of, any |
| | 13 | * terms of an Apple operating system software license agreement. |
| | 14 | * |
| | 15 | * Please obtain a copy of the License at |
| | 16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. |
| | 17 | * |
| | 18 | * The Original Code and all software distributed under the License are |
| | 19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| | 20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| | 21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| | 22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
| | 23 | * Please see the License for the specific language governing rights and |
| | 24 | * limitations under the License. |
| | 25 | * |
| | 26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
| | 27 | */ |
| | 28 | /* |
| | 29 | * @OSF_COPYRIGHT_INTERNAL_USE_ONLY@ |
| | 30 | */ |
| | 31 | |
| | 32 | /* |
| | 33 | Performance.s |
| | 34 | |
| | 35 | Handle things that should are related to the hardware performance monitor |
| | 36 | |
| | 37 | Lovingly crafted by Bill Angell using traditional methods and only natural or recycled materials. |
| | 38 | No more than 7500 chinchillas were killed in the production of the code. |
| | 39 | |
| | 40 | */ |
| | 41 | |
| | 42 | #include <ppc/asm.h> |
| | 43 | #include <ppc/proc_reg.h> |
| | 44 | #include <ppc/exception.h> |
| | 45 | #include <ppc/Performance.h> |
| | 46 | #include <mach/machine/vm_param.h> |
| | 47 | #include <assym.s> |
| | 48 | |
| | 49 | #if PERF_HIST |
| | 50 | /* |
| | 51 | * This routine is used to interface to the performance monitor |
| | 52 | */ |
| | 53 | |
| | 54 | ENTRY(PerfCtl, TAG_NO_FRAME_USED) |
| | 55 | |
| | 56 | lis r0,PerfCtlCall@h /* Get the top part of the SC number */ |
| | 57 | ori r0,r0,PerfCtlCall@l /* and the bottom part */ |
| | 58 | sc /* Do it to it */ |
| | 59 | blr /* Bye bye, Birdie... */ |
| | 60 | |
| | 61 | |
| | 62 | ENTRY(PerfCtlLL, TAG_NO_FRAME_USED) |
| | 63 | |
| | 64 | cmplwi r3,maxPerf /* See if we are within range */ |
| | 65 | mflr r11 /* Get the return point */ |
| | 66 | li r3,0 /* Show failure */ |
| | 67 | bgelrl- /* Load up current address and, also, leave if out of range */ |
| | 68 | prfBase: mflr r12 /* Get our address */ |
| | 69 | rlwinm r10,r3,2,0,31 /* Get displacement into branch table */ |
| | 70 | addi r12,r12,prfBrnch-prfBase /* Point to the branch address */ |
| | 71 | add r12,r12,r10 /* Point to the branch */ |
| | 72 | mtlr r12 /* Get it in the link register */ |
| | 73 | blr /* Vector to the specific performance command... */ |
| | 74 | |
| | 75 | prfBrnch: b prfClear /* Clear the histogram table */ |
| | 76 | b prfStart /* Start the performance monitor */ |
| | 77 | b prfStop /* Stop the performance monitor */ |
| | 78 | b prfMap /* Map the histogram into an address space */ |
| | 79 | .equ maxPerf, (.-prfBrnch)/4 /* Set the highest valid address */ |
| | 80 | |
| | 81 | /* |
| | 82 | * Clear the monitor histogram |
| | 83 | */ |
| | 84 | prfClear: |
| | 85 | li r4,PMIhist@l /* We know this to be in page 0, so no need for the high part */ |
| | 86 | lis r8,PMIHIST_SIZE@h /* Get high half of the table size */ |
| | 87 | lwz r4,0(r4) /* Get the real address of the histgram */ |
| | 88 | ori r8,r8,PMIHIST_SIZE@l /* Get the low half of the table size */ |
| | 89 | li r6,32 /* Get a displacement */ |
| | 90 | li r3,1 /* Set up a good return code */ |
| | 91 | mtlr r11 /* Restore the return address */ |
| | 92 | |
| | 93 | clrloop: subi r8,r8,32 /* Back off a cache line */ |
| | 94 | dcbz 0,r4 /* Do the even line */ |
| | 95 | sub. r8,r8,r6 /* Back off a second time (we only do this to generate a CR */ |
| | 96 | dcbz r6,r4 /* Clear the even line */ |
| | 97 | addi r4,r4,64 /* Move up to every other line */ |
| | 98 | bgt+ clrloop /* Go until we've done it all... */ |
| | 99 | |
| | 100 | blr /* Leave... */ |
| | 101 | |
| | 102 | /* |
| | 103 | * Start the monitor histogram |
| | 104 | */ |
| | 105 | prfStart: |
| | 106 | mtlr r11 /* Restore the return address */ |
| | 107 | blr /* Return... */ |
| | 108 | |
| | 109 | /* |
| | 110 | * Stop the monitor histogram |
| | 111 | */ |
| | 112 | prfStop: |
| | 113 | mtlr r11 /* Restore the return address */ |
| | 114 | blr /* Return... */ |
| | 115 | |
| | 116 | /* |
| | 117 | * Maps the monitor histogram into another address space |
| | 118 | */ |
| | 119 | prfMap: |
| | 120 | mtlr r11 /* Restore the return address */ |
| | 121 | blr /* Return... */ |
| | 122 | |
| | 123 | #endif |
| | 124 | |
projects / apple / xnu.git / blame_incremental