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
 16#include "op_impl.h"
 17
 18extern struct op_mips_model op_model_mipsxx_ops __weak;
 19extern struct op_mips_model op_model_rm9000_ops __weak;
 20extern struct op_mips_model op_model_loongson2_ops __weak;
 21
 22static struct op_mips_model *model;
 23
 24static struct op_counter_config ctr[20];
 25
 26static int op_mips_setup(void)
 27{
 28	/* Pre-compute the values to stuff in the hardware registers.  */
 29	model->reg_setup(ctr);
 30
 31	/* Configure the registers on all cpus.  */
 32	on_each_cpu(model->cpu_setup, NULL, 1);
 33
 34        return 0;
 35}
 36
 37static int op_mips_create_files(struct super_block *sb, struct dentry *root)
 38{
 39	int i;
 40
 41	for (i = 0; i < model->num_counters; ++i) {
 42		struct dentry *dir;
 43		char buf[4];
 44
 45		snprintf(buf, sizeof buf, "%d", i);
 46		dir = oprofilefs_mkdir(sb, root, buf);
 47
 48		oprofilefs_create_ulong(sb, dir, "enabled", &ctr[i].enabled);
 49		oprofilefs_create_ulong(sb, dir, "event", &ctr[i].event);
 50		oprofilefs_create_ulong(sb, dir, "count", &ctr[i].count);
 51		oprofilefs_create_ulong(sb, dir, "kernel", &ctr[i].kernel);
 52		oprofilefs_create_ulong(sb, dir, "user", &ctr[i].user);
 53		oprofilefs_create_ulong(sb, dir, "exl", &ctr[i].exl);
 54		/* Dummy.  */
 55		oprofilefs_create_ulong(sb, dir, "unit_mask", &ctr[i].unit_mask);
 56	}
 57
 58	return 0;
 59}
 60
 61static int op_mips_start(void)
 62{
 63	on_each_cpu(model->cpu_start, NULL, 1);
 64
 65	return 0;
 66}
 67
 68static void op_mips_stop(void)
 69{
 70	/* Disable performance monitoring for all counters.  */
 71	on_each_cpu(model->cpu_stop, NULL, 1);
 72}
 73
 74int __init oprofile_arch_init(struct oprofile_operations *ops)
 75{
 76	struct op_mips_model *lmodel = NULL;
 77	int res;
 78
 79	switch (current_cpu_type()) {
 80	case CPU_5KC:
 81	case CPU_M14KC:
 82	case CPU_20KC:
 83	case CPU_24K:
 84	case CPU_25KF:
 85	case CPU_34K:
 86	case CPU_1004K:
 87	case CPU_74K:
 88	case CPU_SB1:
 89	case CPU_SB1A:
 90	case CPU_R10000:
 91	case CPU_R12000:
 92	case CPU_R14000:
 93		lmodel = &op_model_mipsxx_ops;
 94		break;
 95
 96	case CPU_RM9000:
 97		lmodel = &op_model_rm9000_ops;
 98		break;
 99	case CPU_LOONGSON2:
100		lmodel = &op_model_loongson2_ops;
101		break;
102	};
103
104	if (!lmodel)
105		return -ENODEV;
106
107	res = lmodel->init();
108	if (res)
109		return res;
110
111	model = lmodel;
112
113	ops->create_files	= op_mips_create_files;
114	ops->setup		= op_mips_setup;
115	//ops->shutdown         = op_mips_shutdown;
116	ops->start		= op_mips_start;
117	ops->stop		= op_mips_stop;
118	ops->cpu_type		= lmodel->cpu_type;
119	ops->backtrace		= op_mips_backtrace;
120
121	printk(KERN_INFO "oprofile: using %s performance monitoring.\n",
122	       lmodel->cpu_type);
123
124	return 0;
125}
126
127void oprofile_arch_exit(void)
128{
129	if (model)
130		model->exit();
131}