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	/* 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
40IOLock * gInterruptAccountingDataListLock = NULL;
41queue_head_t gInterruptAccountingDataList;
42
43void 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
57void interruptAccountingDataAddToList(IOInterruptAccountingData * data)
58{
59	IOLockLock(gInterruptAccountingDataListLock);
60	queue_enter(&gInterruptAccountingDataList, data, IOInterruptAccountingData *, chain);
61	IOLockUnlock(gInterruptAccountingDataListLock);
62}
63
64void interruptAccountingDataRemoveFromList(IOInterruptAccountingData * data)
65{
66	IOLockLock(gInterruptAccountingDataListLock);
67	queue_remove(&gInterruptAccountingDataList, data, IOInterruptAccountingData *, chain);
68	IOLockUnlock(gInterruptAccountingDataListLock);
69}
70
71void 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
81void 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