summaryrefslogtreecommitdiffstats
path: root/arch/blackfin/oprofile
diff options
context:
space:
mode:
Diffstat (limited to 'arch/blackfin/oprofile')
-rw-r--r--arch/blackfin/oprofile/Kconfig29
-rw-r--r--arch/blackfin/oprofile/Makefile14
-rw-r--r--arch/blackfin/oprofile/common.c168
-rw-r--r--arch/blackfin/oprofile/op_blackfin.h98
-rw-r--r--arch/blackfin/oprofile/op_model_bf533.c161
-rw-r--r--arch/blackfin/oprofile/timer_int.c74
6 files changed, 544 insertions, 0 deletions
diff --git a/arch/blackfin/oprofile/Kconfig b/arch/blackfin/oprofile/Kconfig
new file mode 100644
index 000000000000..0a2fd999c941
--- /dev/null
+++ b/arch/blackfin/oprofile/Kconfig
@@ -0,0 +1,29 @@
+menu "Profiling support"
+depends on EXPERIMENTAL
+
+config PROFILING
+ bool "Profiling support (EXPERIMENTAL)"
+ help
+ Say Y here to enable the extended profiling support mechanisms used
+ by profilers such as OProfile.
+
+config OPROFILE
+ tristate "OProfile system profiling (EXPERIMENTAL)"
+ depends on PROFILING
+ help
+ OProfile is a profiling system capable of profiling the
+ whole system, include the kernel, kernel modules, libraries,
+ and applications.
+
+ If unsure, say N.
+
+config HARDWARE_PM
+ tristate "Hardware Performance Monitor Profiling"
+ depends on PROFILING
+ help
+ take use of hardware performance monitor to profiling the kernel
+ and application.
+
+ If unsure, say N.
+
+endmenu
diff --git a/arch/blackfin/oprofile/Makefile b/arch/blackfin/oprofile/Makefile
new file mode 100644
index 000000000000..634e300d67e2
--- /dev/null
+++ b/arch/blackfin/oprofile/Makefile
@@ -0,0 +1,14 @@
+#
+# arch/blackfin/oprofile/Makefile
+#
+
+obj-$(CONFIG_OPROFILE) += oprofile.o
+
+DRIVER_OBJS := $(addprefix ../../../drivers/oprofile/, \
+ oprof.o cpu_buffer.o buffer_sync.o \
+ event_buffer.o oprofile_files.o \
+ oprofilefs.o oprofile_stats.o \
+ timer_int.o )
+
+oprofile-y := $(DRIVER_OBJS) common.o
+oprofile-$(CONFIG_HARDWARE_PM) += op_model_bf533.o
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)
+{
+}
diff --git a/arch/blackfin/oprofile/op_blackfin.h b/arch/blackfin/oprofile/op_blackfin.h
new file mode 100644
index 000000000000..f88f446c814f
--- /dev/null
+++ b/arch/blackfin/oprofile/op_blackfin.h
@@ -0,0 +1,98 @@
+/*
+ * File: arch/blackfin/oprofile/op_blackfin.h
+ * Based on:
+ * 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
+ */
+
+#ifndef OP_BLACKFIN_H
+#define OP_BLACKFIN_H 1
+
+#define OP_MAX_COUNTER 2
+
+#include <asm/blackfin.h>
+
+/* Per-counter configuration as set via oprofilefs. */
+struct op_counter_config {
+ unsigned long valid;
+ unsigned long enabled;
+ unsigned long event;
+ unsigned long count;
+ unsigned long kernel;
+ unsigned long user;
+ unsigned long unit_mask;
+};
+
+/* System-wide configuration as set via oprofilefs. */
+struct op_system_config {
+ unsigned long enable_kernel;
+ unsigned long enable_user;
+};
+
+/* Per-arch configuration */
+struct op_bfin533_model {
+ int (*reg_setup) (struct op_counter_config *);
+ int (*start) (struct op_counter_config *);
+ void (*stop) (void);
+ int num_counters;
+ char *name;
+};
+
+extern struct op_bfin533_model op_model_bfin533;
+
+static inline unsigned int ctr_read(void)
+{
+ unsigned int tmp;
+
+ tmp = bfin_read_PFCTL();
+ __builtin_bfin_csync();
+
+ return tmp;
+}
+
+static inline void ctr_write(unsigned int val)
+{
+ bfin_write_PFCTL(val);
+ __builtin_bfin_csync();
+}
+
+static inline void count_read(unsigned int *count)
+{
+ count[0] = bfin_read_PFCNTR0();
+ count[1] = bfin_read_PFCNTR1();
+ __builtin_bfin_csync();
+}
+
+static inline void count_write(unsigned int *count)
+{
+ bfin_write_PFCNTR0(count[0]);
+ bfin_write_PFCNTR1(count[1]);
+ __builtin_bfin_csync();
+}
+
+extern int pm_overflow_handler(int irq, struct pt_regs *regs);
+
+#endif
diff --git a/arch/blackfin/oprofile/op_model_bf533.c b/arch/blackfin/oprofile/op_model_bf533.c
new file mode 100644
index 000000000000..b7a20a006b49
--- /dev/null
+++ b/arch/blackfin/oprofile/op_model_bf533.c
@@ -0,0 +1,161 @@
+/*
+ * File: arch/blackfin/oprofile/op_model_bf533.c
+ * Based on:
+ * 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/interrupt.h>
+#include <asm/ptrace.h>
+#include <asm/system.h>
+#include <asm/processor.h>
+#include <asm/blackfin.h>
+#include <asm/irq.h>
+#include <asm/io.h>
+
+#include "op_blackfin.h"
+
+#define PM_ENABLE 0x01;
+#define PM_CTL1_ENABLE 0x18
+#define PM_CTL0_ENABLE 0xC000
+#define COUNT_EDGE_ONLY 0x3000000
+
+static int oprofile_running;
+
+static unsigned curr_pfctl, curr_count[2];
+
+static int bfin533_reg_setup(struct op_counter_config *ctr)
+{
+ unsigned int pfctl = ctr_read();
+ unsigned int count[2];
+
+ /* set Blackfin perf monitor regs with ctr */
+ if (ctr[0].enabled) {
+ pfctl |= (PM_CTL0_ENABLE | ((char)ctr[0].event << 5));
+ count[0] = 0xFFFFFFFF - ctr[0].count;
+ curr_count[0] = count[0];
+ }
+ if (ctr[1].enabled) {
+ pfctl |= (PM_CTL1_ENABLE | ((char)ctr[1].event << 16));
+ count[1] = 0xFFFFFFFF - ctr[1].count;
+ curr_count[1] = count[1];
+ }
+
+ pr_debug("ctr[0].enabled=%d,ctr[1].enabled=%d,ctr[0].event<<5=0x%x,ctr[1].event<<16=0x%x\n", ctr[0].enabled, ctr[1].enabled, ctr[0].event << 5, ctr[1].event << 16);
+ pfctl |= COUNT_EDGE_ONLY;
+ curr_pfctl = pfctl;
+
+ pr_debug("write 0x%x to pfctl\n", pfctl);
+ ctr_write(pfctl);
+ count_write(count);
+
+ return 0;
+}
+
+static int bfin533_start(struct op_counter_config *ctr)
+{
+ unsigned int pfctl = ctr_read();
+
+ pfctl |= PM_ENABLE;
+ curr_pfctl = pfctl;
+
+ ctr_write(pfctl);
+
+ oprofile_running = 1;
+ pr_debug("start oprofile counter \n");
+
+ return 0;
+}
+
+static void bfin533_stop(void)
+{
+ int pfctl;
+
+ pfctl = ctr_read();
+ pfctl &= ~PM_ENABLE;
+ /* freeze counters */
+ ctr_write(pfctl);
+
+ oprofile_running = 0;
+ pr_debug("stop oprofile counter \n");
+}
+
+static int get_kernel(void)
+{
+ int ipend, is_kernel;
+
+ ipend = bfin_read_IPEND();
+
+ /* test bit 15 */
+ is_kernel = ((ipend & 0x8000) != 0);
+
+ return is_kernel;
+}
+
+int pm_overflow_handler(int irq, struct pt_regs *regs)
+{
+ int is_kernel;
+ int i, cpu;
+ unsigned int pc, pfctl;
+ unsigned int count[2];
+
+ pr_debug("get interrupt in %s\n", __FUNCTION__);
+ if (oprofile_running == 0) {
+ pr_debug("error: entering interrupt when oprofile is stopped.\n\r");
+ return -1;
+ }
+
+ is_kernel = get_kernel();
+ cpu = smp_processor_id();
+ pc = regs->pc;
+ pfctl = ctr_read();
+
+ /* read the two event counter regs */
+ count_read(count);
+
+ /* if the counter overflows, add sample to oprofile buffer */
+ for (i = 0; i < 2; ++i) {
+ if (oprofile_running) {
+ oprofile_add_sample(regs, i);
+ }
+ }
+
+ /* reset the perfmon counter */
+ ctr_write(curr_pfctl);
+ count_write(curr_count);
+ return 0;
+}
+
+struct op_bfin533_model op_model_bfin533 = {
+ .reg_setup = bfin533_reg_setup,
+ .start = bfin533_start,
+ .stop = bfin533_stop,
+ .num_counters = 2,
+ .name = "blackfin/bf533"
+};
diff --git a/arch/blackfin/oprofile/timer_int.c b/arch/blackfin/oprofile/timer_int.c
new file mode 100644
index 000000000000..8fba16c846c9
--- /dev/null
+++ b/arch/blackfin/oprofile/timer_int.c
@@ -0,0 +1,74 @@
+/*
+ * File: arch/blackfin/oprofile/timer_int.c
+ * Based on:
+ * Author: Michael Kang
+ *
+ * Created:
+ * Description:
+ *
+ * Modified:
+ * 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/init.h>
+#include <linux/smp.h>
+#include <linux/irq.h>
+#include <linux/oprofile.h>
+
+#include <asm/ptrace.h>
+
+static void enable_sys_timer0()
+{
+}
+static void disable_sys_timer0()
+{
+}
+
+static irqreturn_t sys_timer0_int_handler(int irq, void *dev_id,
+ struct pt_regs *regs)
+{
+ oprofile_add_sample(regs, 0);
+ return IRQ_HANDLED;
+}
+
+static int sys_timer0_start(void)
+{
+ enable_sys_timer0();
+ return request_irq(IVG11, sys_timer0_int_handler, 0, "sys_timer0", NULL);
+}
+
+static void sys_timer0_stop(void)
+{
+ disable_sys_timer();
+}
+
+int __init sys_timer0_init(struct oprofile_operations *ops)
+{
+ extern int nmi_active;
+
+ if (nmi_active <= 0)
+ return -ENODEV;
+
+ ops->start = timer_start;
+ ops->stop = timer_stop;
+ ops->cpu_type = "timer";
+ printk(KERN_INFO "oprofile: using NMI timer interrupt.\n");
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-23 12:54:20 +0000