1 /* 2 * Copyright (c) 2014 Apple 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 #define IOKIT_ENABLE_SHARED_PTR 30 31 #include <IOKit/IOInterruptAccountingPrivate.h> 32 #include <IOKit/IOKernelReporters.h> 33 34 uint32_t gInterruptAccountingStatisticBitmask = 35 #if !defined(__arm__) 36 /* Disable timestamps for older ARM platforms; they are expensive. */ 37 IA_GET_ENABLE_BIT(kInterruptAccountingFirstLevelTimeIndex) | 38 IA_GET_ENABLE_BIT(kInterruptAccountingSecondLevelCPUTimeIndex) | 39 IA_GET_ENABLE_BIT(kInterruptAccountingSecondLevelSystemTimeIndex) | 40 #endif 41 IA_GET_ENABLE_BIT(kInterruptAccountingFirstLevelCountIndex) | 42 IA_GET_ENABLE_BIT(kInterruptAccountingSecondLevelCountIndex); 43 44 IOLock * gInterruptAccountingDataListLock = NULL; 45 queue_head_t gInterruptAccountingDataList; 46 47 void 48 interruptAccountingInit(void) 49 { 50 int bootArgValue = 0; 51 52 if (PE_parse_boot_argn("interrupt_accounting", &bootArgValue, sizeof(bootArgValue))) { 53 gInterruptAccountingStatisticBitmask = bootArgValue; 54 } 55 56 gInterruptAccountingDataListLock = IOLockAlloc(); 57 58 assert(gInterruptAccountingDataListLock); 59 60 queue_init(&gInterruptAccountingDataList); 61 } 62 63 void 64 interruptAccountingDataAddToList(IOInterruptAccountingData * data) 65 { 66 IOLockLock(gInterruptAccountingDataListLock); 67 queue_enter(&gInterruptAccountingDataList, data, IOInterruptAccountingData *, chain); 68 IOLockUnlock(gInterruptAccountingDataListLock); 69 } 70 71 void 72 interruptAccountingDataRemoveFromList(IOInterruptAccountingData * data) 73 { 74 IOLockLock(gInterruptAccountingDataListLock); 75 queue_remove(&gInterruptAccountingDataList, data, IOInterruptAccountingData *, chain); 76 IOLockUnlock(gInterruptAccountingDataListLock); 77 } 78 79 void 80 interruptAccountingDataUpdateChannels(IOInterruptAccountingData * data, IOSimpleReporter * reporter) 81 { 82 uint64_t i = 0; 83 84 for (i = 0; i < IA_NUM_INTERRUPT_ACCOUNTING_STATISTICS; i++) { 85 if (IA_GET_STATISTIC_ENABLED(i)) { 86 reporter->setValue(IA_GET_CHANNEL_ID(data->interruptIndex, i), data->interruptStatistics[i]); 87 } 88 } 89 } 90 91 void 92 interruptAccountingDataInheritChannels(IOInterruptAccountingData * data, IOSimpleReporter * reporter) 93 { 94 uint64_t i = 0; 95 96 for (i = 0; i < IA_NUM_INTERRUPT_ACCOUNTING_STATISTICS; i++) { 97 if (IA_GET_STATISTIC_ENABLED(i)) { 98 data->interruptStatistics[i] = reporter->getValue(IA_GET_CHANNEL_ID(data->interruptIndex, i)); 99 } 100 } 101 } 102