1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License.  See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 2004, 2005 Ralf Baechle
7 * Copyright (C) 2005 MIPS Technologies, Inc.
8 */
9#include <linux/compiler.h>
10#include <linux/errno.h>
11#include <linux/init.h>
12#include <linux/oprofile.h>
13#include <linux/smp.h>
14#include <asm/cpu-info.h>
15#include <asm/cpu-type.h>
16
17#include "op_impl.h"
18
19extern struct op_mips_model op_model_mipsxx_ops __weak;
20extern struct op_mips_model op_model_loongson2_ops __weak;
21extern struct op_mips_model op_model_loongson3_ops __weak;
22
23static struct op_mips_model *model;
24
25static struct op_counter_config ctr[20];
26
27static int op_mips_setup(void)
28{
29	/* Pre-compute the values to stuff in the hardware registers.  */
30	model->reg_setup(ctr);
31
32	/* Configure the registers on all cpus.	 */
33	on_each_cpu(model->cpu_setup, NULL, 1);
34
35	return 0;
36}
37
38static int op_mips_create_files(struct dentry *root)
39{
40	int i;
41
42	for (i = 0; i < model->num_counters; ++i) {
43		struct dentry *dir;
44		char buf[4];
45
46		snprintf(buf, sizeof buf, "%d", i);
47		dir = oprofilefs_mkdir(root, buf);
48
49		oprofilefs_create_ulong(dir, "enabled", &ctr[i].enabled);
50		oprofilefs_create_ulong(dir, "event", &ctr[i].event);
51		oprofilefs_create_ulong(dir, "count", &ctr[i].count);
52		oprofilefs_create_ulong(dir, "kernel", &ctr[i].kernel);
53		oprofilefs_create_ulong(dir, "user", &ctr[i].user);
54		oprofilefs_create_ulong(dir, "exl", &ctr[i].exl);
55		/* Dummy.  */
56		oprofilefs_create_ulong(dir, "unit_mask", &ctr[i].unit_mask);
57	}
58
59	return 0;
60}
61
62static int op_mips_start(void)
63{
64	on_each_cpu(model->cpu_start, NULL, 1);
65
66	return 0;
67}
68
69static void op_mips_stop(void)
70{
71	/* Disable performance monitoring for all counters.  */
72	on_each_cpu(model->cpu_stop, NULL, 1);
73}
74
75int __init oprofile_arch_init(struct oprofile_operations *ops)
76{
77	struct op_mips_model *lmodel = NULL;
78	int res;
79
80	switch (current_cpu_type()) {
81	case CPU_5KC:
82	case CPU_M14KC:
83	case CPU_M14KEC:
84	case CPU_20KC:
85	case CPU_24K:
86	case CPU_25KF:
87	case CPU_34K:
88	case CPU_1004K:
89	case CPU_74K:
90	case CPU_1074K:
91	case CPU_INTERAPTIV:
92	case CPU_PROAPTIV:
93	case CPU_P5600:
94	case CPU_M5150:
95	case CPU_LOONGSON1:
96	case CPU_SB1:
97	case CPU_SB1A:
98	case CPU_R10000:
99	case CPU_R12000:
100	case CPU_R14000:
101	case CPU_R16000:
102	case CPU_XLR:
103		lmodel = &op_model_mipsxx_ops;
104		break;
105
106	case CPU_LOONGSON2:
107		lmodel = &op_model_loongson2_ops;
108		break;
109	case CPU_LOONGSON3:
110		lmodel = &op_model_loongson3_ops;
111		break;
112	};
113
114	/*
115	 * Always set the backtrace. This allows unsupported CPU types to still
116	 * use timer-based oprofile.
117	 */
118	ops->backtrace = op_mips_backtrace;
119
120	if (!lmodel)
121		return -ENODEV;
122
123	res = lmodel->init();
124	if (res)
125		return res;
126
127	model = lmodel;
128
129	ops->create_files	= op_mips_create_files;
130	ops->setup		= op_mips_setup;
131	//ops->shutdown		= op_mips_shutdown;
132	ops->start		= op_mips_start;
133	ops->stop		= op_mips_stop;
134	ops->cpu_type		= lmodel->cpu_type;
135
136	printk(KERN_INFO "oprofile: using %s performance monitoring.\n",
137	       lmodel->cpu_type);
138
139	return 0;
140}
141
142void oprofile_arch_exit(void)
143{
144	if (model)
145		model->exit();
146}
147