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