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-rw-r--r--arch/blackfin/oprofile/common.c168
1 files changed, 168 insertions, 0 deletions
diff --git a/arch/blackfin/oprofile/common.c b/arch/blackfin/oprofile/common.c
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+/*
+ * File: arch/blackfin/oprofile/common.c
+ * Based on: arch/alpha/oprofile/common.c
+ * Author: Anton Blanchard <anton@au.ibm.com>
+ *
+ * Created:
+ * Description:
+ *
+ * Modified:
+ * Copyright (C) 2004 Anton Blanchard <anton@au.ibm.com>, IBM
+ * Copyright 2004-2006 Analog Devices Inc.
+ *
+ * Bugs: Enter bugs at http://blackfin.uclinux.org/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <linux/oprofile.h>
+#include <linux/init.h>
+#include <linux/smp.h>
+#include <linux/errno.h>
+#include <linux/mutex.h>
+
+#include <asm/ptrace.h>
+#include <asm/system.h>
+#include <asm/blackfin.h>
+#include <asm/irq.h>
+#include <asm/io.h>
+
+#include "op_blackfin.h"
+
+#define BFIN_533_ID 0xE5040003
+#define BFIN_537_ID 0xE5040002
+
+static int pfmon_enabled;
+static struct mutex pfmon_lock;
+
+struct op_bfin533_model *model;
+
+struct op_counter_config ctr[OP_MAX_COUNTER];
+
+static int op_bfin_setup(void)
+{
+ int ret;
+
+ /* Pre-compute the values to stuff in the hardware registers. */
+ spin_lock(&oprofilefs_lock);
+ ret = model->reg_setup(ctr);
+ spin_unlock(&oprofilefs_lock);
+
+ return ret;
+}
+
+static void op_bfin_shutdown(void)
+{
+#if 0
+ /* what is the difference between shutdown and stop? */
+#endif
+}
+
+static int op_bfin_start(void)
+{
+ int ret = -EBUSY;
+
+ printk(KERN_INFO "KSDBG:in %s\n", __FUNCTION__);
+ mutex_lock(&pfmon_lock);
+ if (!pfmon_enabled) {
+ ret = model->start(ctr);
+ pfmon_enabled = !ret;
+ }
+ mutex_unlock(&pfmon_lock);
+
+ return ret;
+}
+
+static void op_bfin_stop(void)
+{
+ mutex_lock(&pfmon_lock);
+ if (pfmon_enabled) {
+ model->stop();
+ pfmon_enabled = 0;
+ }
+ mutex_unlock(&pfmon_lock);
+}
+
+static int op_bfin_create_files(struct super_block *sb, struct dentry *root)
+{
+ int i;
+
+ for (i = 0; i < model->num_counters; ++i) {
+ struct dentry *dir;
+ char buf[3];
+ printk(KERN_INFO "Oprofile: creating files... \n");
+
+ snprintf(buf, sizeof buf, "%d", i);
+ dir = oprofilefs_mkdir(sb, root, buf);
+
+ oprofilefs_create_ulong(sb, dir, "enabled", &ctr[i].enabled);
+ oprofilefs_create_ulong(sb, dir, "event", &ctr[i].event);
+ oprofilefs_create_ulong(sb, dir, "count", &ctr[i].count);
+ /*
+ * We dont support per counter user/kernel selection, but
+ * we leave the entries because userspace expects them
+ */
+ oprofilefs_create_ulong(sb, dir, "kernel", &ctr[i].kernel);
+ oprofilefs_create_ulong(sb, dir, "user", &ctr[i].user);
+ oprofilefs_create_ulong(sb, dir, "unit_mask",
+ &ctr[i].unit_mask);
+ }
+
+ return 0;
+}
+int __init oprofile_arch_init(struct oprofile_operations *ops)
+{
+#ifdef CONFIG_HARDWARE_PM
+ unsigned int dspid;
+
+ mutex_init(&pfmon_lock);
+
+ dspid = bfin_read_DSPID();
+
+ printk(KERN_INFO "Oprofile got the cpu id is 0x%x. \n", dspid);
+
+ switch (dspid) {
+ case BFIN_533_ID:
+ model = &op_model_bfin533;
+ model->num_counters = 2;
+ break;
+ case BFIN_537_ID:
+ model = &op_model_bfin533;
+ model->num_counters = 2;
+ break;
+ default:
+ return -ENODEV;
+ }
+
+ ops->cpu_type = model->name;
+ ops->create_files = op_bfin_create_files;
+ ops->setup = op_bfin_setup;
+ ops->shutdown = op_bfin_shutdown;
+ ops->start = op_bfin_start;
+ ops->stop = op_bfin_stop;
+
+ printk(KERN_INFO "oprofile: using %s performance monitoring.\n",
+ ops->cpu_type);
+
+ return 0;
+#else
+ return -1;
+#endif
+}
+
+void oprofile_arch_exit(void)
+{
+}