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
32uint32_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
42IOLock * gInterruptAccountingDataListLock = NULL;
43queue_head_t gInterruptAccountingDataList;
44
45void 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
59void interruptAccountingDataAddToList(IOInterruptAccountingData * data)
60{
61 IOLockLock(gInterruptAccountingDataListLock);
62 queue_enter(&gInterruptAccountingDataList, data, IOInterruptAccountingData *, chain);
63 IOLockUnlock(gInterruptAccountingDataListLock);
64}
65
66void interruptAccountingDataRemoveFromList(IOInterruptAccountingData * data)
67{
68 IOLockLock(gInterruptAccountingDataListLock);
69 queue_remove(&gInterruptAccountingDataList, data, IOInterruptAccountingData *, chain);
70 IOLockUnlock(gInterruptAccountingDataListLock);
71}
72
73void 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
83void 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