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_I6400:
 95	case CPU_M5150:
 96	case CPU_LOONGSON1:
 97	case CPU_SB1:
 98	case CPU_SB1A:
 99	case CPU_R10000:
100	case CPU_R12000:
101	case CPU_R14000:
102	case CPU_R16000:
103	case CPU_XLR:
104		lmodel = &op_model_mipsxx_ops;
105		break;
106
107	case CPU_LOONGSON2:
108		lmodel = &op_model_loongson2_ops;
109		break;
110	case CPU_LOONGSON3:
111		lmodel = &op_model_loongson3_ops;
112		break;
113	};
114
115	/*
116	 * Always set the backtrace. This allows unsupported CPU types to still
117	 * use timer-based oprofile.
118	 */
119	ops->backtrace = op_mips_backtrace;
120
121	if (!lmodel)
122		return -ENODEV;
123
124	res = lmodel->init();
125	if (res)
126		return res;
127
128	model = lmodel;
129
130	ops->create_files	= op_mips_create_files;
131	ops->setup		= op_mips_setup;
132	//ops->shutdown		= op_mips_shutdown;
133	ops->start		= op_mips_start;
134	ops->stop		= op_mips_stop;
135	ops->cpu_type		= lmodel->cpu_type;
136
137	printk(KERN_INFO "oprofile: using %s performance monitoring.\n",
138	       lmodel->cpu_type);
139
140	return 0;
141}
142
143void oprofile_arch_exit(void)
144{
145	if (model)
146		model->exit();
147}