1 files changed, 168 insertions, 0 deletions

diff --git a/arch/blackfin/oprofile/common.c b/arch/blackfin/oprofile/common.c
new file mode 100644
index 000000000000..009a1700c854
--- /dev/null
+++ b/arch/blackfin/oprofile/common.c
@@ -0,0 +1,168 @@
+/*
+ * 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)
+{
+}