1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
|
/* Copyright (c) 2010-2012, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/irq.h>
#include <linux/platform_device.h>
#include <asm/pmu.h>
#include <mach/irqs.h>
#include <mach/socinfo.h>
#if defined(CONFIG_ARCH_MSM_KRAITMP) || defined(CONFIG_ARCH_MSM_SCORPIONMP)
static DEFINE_PER_CPU(u32, pmu_irq_cookie);
static int
multicore_request_irq(int irq, irq_handler_t *handle_irq)
{
int err = 0;
int cpu;
err = request_percpu_irq(irq, *handle_irq, "l1-armpmu",
&pmu_irq_cookie);
if (!err) {
for_each_cpu(cpu, cpu_online_mask) {
smp_call_function_single(cpu,
enable_irq_callback, &irq, 1);
}
}
return err;
}
static void
multicore_free_irq(int irq)
{
int cpu;
struct irq_desc *desc = irq_to_desc(irq);
if ((irq >= 0) && desc) {
for_each_cpu(cpu, desc->percpu_enabled)
smp_call_function_single(cpu,
disable_irq_callback, &irq, 1);
free_percpu_irq(irq, &pmu_irq_cookie);
}
}
static struct arm_pmu_platdata multicore_data = {
.request_pmu_irq = multicore_request_irq,
.free_pmu_irq = multicore_free_irq,
};
#endif
static struct resource cpu_pmu_resource[] = {
{
.start = INT_ARMQC_PERFMON,
.end = INT_ARMQC_PERFMON,
.flags = IORESOURCE_IRQ,
},
};
#ifdef CONFIG_CPU_HAS_L2_PMU
static struct resource l2_pmu_resource[] = {
{
.start = SC_SICL2PERFMONIRPTREQ,
.end = SC_SICL2PERFMONIRPTREQ,
.flags = IORESOURCE_IRQ,
},
};
static struct platform_device l2_pmu_device = {
.name = "l2-arm-pmu",
.id = ARM_PMU_DEVICE_L2CC,
.resource = l2_pmu_resource,
.num_resources = ARRAY_SIZE(l2_pmu_resource),
};
#endif
static struct platform_device cpu_pmu_device = {
.name = "cpu-arm-pmu",
.id = ARM_PMU_DEVICE_CPU,
.resource = cpu_pmu_resource,
.num_resources = ARRAY_SIZE(cpu_pmu_resource),
};
static struct platform_device *pmu_devices[] = {
&cpu_pmu_device,
#ifdef CONFIG_CPU_HAS_L2_PMU
&l2_pmu_device,
#endif
};
static int __init msm_pmu_init(void)
{
/*
* For the targets we know are multicore's set the request/free IRQ
* handlers to call the percpu API.
* Defaults to unicore API {request,free}_irq().
* See arch/arm/kernel/perf_event.c
*/
#if defined(CONFIG_ARCH_MSM_KRAITMP) || defined(CONFIG_ARCH_MSM_SCORPIONMP)
cpu_pmu_device.dev.platform_data = &multicore_data;
#endif
return platform_add_devices(pmu_devices, ARRAY_SIZE(pmu_devices));
}
arch_initcall(msm_pmu_init);
|
