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