Finally, add the i386 timer-interrupt and perfctr drivers for i386
diff -X dontdiff -Naur linux-linus/arch/i386/Makefile linux-linus2/arch/i386/Makefile
--- linux-linus/arch/i386/Makefile Sun Oct 13 19:51:03 2002
+++ linux-linus2/arch/i386/Makefile Tue Oct 15 23:10:31 2002
@@ -57,6 +57,8 @@
arch/i386/$(MACHINE)/
drivers-$(CONFIG_MATH_EMULATION) += arch/i386/math-emu/
drivers-$(CONFIG_PCI) += arch/i386/pci/
+# FIXME: is drivers- right ?
+drivers-$(CONFIG_OPROFILE) += arch/i386/oprofile/
CFLAGS += -Iarch/i386/$(MACHINE)
AFLAGS += -Iarch/i386/$(MACHINE)
diff -X dontdiff -Naur linux-linus/arch/i386/config.in linux-linus2/arch/i386/config.in
--- linux-linus/arch/i386/config.in Tue Oct 15 22:23:10 2002
+++ linux-linus2/arch/i386/config.in Tue Oct 15 23:10:51 2002
@@ -442,12 +442,7 @@
source net/bluetooth/Config.in
-if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
- mainmenu_option next_comment
- comment 'Profiling support'
- bool 'Profiling support (EXPERIMENTAL)' CONFIG_PROFILING
- endmenu
-fi
+source arch/i386/oprofile/Config.in
mainmenu_option next_comment
comment 'Kernel hacking'
diff -X dontdiff -Naur linux-linus/arch/i386/oprofile/Config.help linux-linus2/arch/i386/oprofile/Config.help
--- linux-linus/arch/i386/oprofile/Config.help Thu Jan 1 01:00:00 1970
+++ linux-linus2/arch/i386/oprofile/Config.help Tue Oct 15 23:10:31 2002
@@ -0,0 +1,6 @@
+CONFIG_OPROFILE
+ OProfile is a profiling system capable of profiling the
+ whole system, include the kernel, kernel modules, libraries,
+ and applications.
+
+ If unsure, say N.
diff -X dontdiff -Naur linux-linus/arch/i386/oprofile/Config.in linux-linus2/arch/i386/oprofile/Config.in
--- linux-linus/arch/i386/oprofile/Config.in Thu Jan 1 01:00:00 1970
+++ linux-linus2/arch/i386/oprofile/Config.in Tue Oct 15 23:10:31 2002
@@ -0,0 +1,9 @@
+if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+ mainmenu_option next_comment
+ comment 'Profiling support'
+ bool 'Profiling support (EXPERIMENTAL)' CONFIG_PROFILING
+ if [ "$CONFIG_PROFILING" = "y" ]; then
+ tristate ' OProfile system profiling (EXPERIMENTAL)' CONFIG_OPROFILE
+ fi
+ endmenu
+fi
diff -X dontdiff -Naur linux-linus/arch/i386/oprofile/Makefile linux-linus2/arch/i386/oprofile/Makefile
--- linux-linus/arch/i386/oprofile/Makefile Thu Jan 1 01:00:00 1970
+++ linux-linus2/arch/i386/oprofile/Makefile Tue Oct 15 23:10:31 2002
@@ -0,0 +1,16 @@
+vpath %.c = . $(TOPDIR)/drivers/oprofile
+
+obj-$(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 )
+
+oprofile-objs := $(DRIVER_OBJS) init.o timer_int.o
+
+ifdef CONFIG_X86_LOCAL_APIC
+oprofile-objs += nmi_int.o op_model_athlon.o op_model_ppro.o
+endif
+
+include $(TOPDIR)/Rules.make
diff -X dontdiff -Naur linux-linus/arch/i386/oprofile/init.c linux-linus2/arch/i386/oprofile/init.c
--- linux-linus/arch/i386/oprofile/init.c Thu Jan 1 01:00:00 1970
+++ linux-linus2/arch/i386/oprofile/init.c Tue Oct 15 23:10:31 2002
@@ -0,0 +1,30 @@
+/**
+ * @file init.c
+ *
+ * @remark Copyright 2002 OProfile authors
+ * @remark Read the file COPYING
+ *
+ * @author John Levon <[email protected]>
+ */
+
+#include <linux/kernel.h>
+#include <linux/oprofile.h>
+#include <linux/init.h>
+
+/* We support CPUs that have performance counters like the Pentium Pro
+ * with NMI mode samples. Other x86 CPUs use a simple interrupt keyed
+ * off the timer interrupt, which cannot profile interrupts-disabled
+ * code unlike the NMI-based code.
+ */
+
+extern int nmi_init(struct oprofile_operations ** ops, enum oprofile_cpu * cpu);
+extern void timer_init(struct oprofile_operations ** ops, enum oprofile_cpu * cpu);
+
+int __init oprofile_arch_init(struct oprofile_operations ** ops, enum oprofile_cpu * cpu)
+{
+#ifdef CONFIG_X86_LOCAL_APIC
+ if (!nmi_init(ops, cpu))
+#endif
+ timer_init(ops, cpu);
+ return 0;
+}
diff -X dontdiff -Naur linux-linus/arch/i386/oprofile/nmi_int.c linux-linus2/arch/i386/oprofile/nmi_int.c
--- linux-linus/arch/i386/oprofile/nmi_int.c Thu Jan 1 01:00:00 1970
+++ linux-linus2/arch/i386/oprofile/nmi_int.c Tue Oct 15 23:10:31 2002
@@ -0,0 +1,258 @@
+/**
+ * @file nmi_int.c
+ *
+ * @remark Copyright 2002 OProfile authors
+ * @remark Read the file COPYING
+ *
+ * @author John Levon <[email protected]>
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/notifier.h>
+#include <linux/smp.h>
+#include <linux/oprofile.h>
+#include <linux/pm.h>
+#include <asm/thread_info.h>
+#include <asm/nmi.h>
+#include <asm/ptrace.h>
+#include <asm/msr.h>
+#include <asm/apic.h>
+#include <asm/bitops.h>
+#include <asm/processor.h>
+
+#include "op_counter.h"
+#include "op_x86_model.h"
+
+static struct op_x86_model_spec const * model;
+static struct op_msrs cpu_msrs[NR_CPUS];
+static unsigned long saved_lvtpc[NR_CPUS];
+static unsigned long kernel_only;
+
+static int nmi_start(void);
+static void nmi_stop(void);
+
+static struct pm_dev * oprofile_pmdev;
+
+/* We're at risk of causing big trouble unless we
+ * make sure to not cause any NMI interrupts when
+ * suspended.
+ */
+static int oprofile_pm_callback(struct pm_dev * dev,
+ pm_request_t rqst, void * data)
+{
+ switch (rqst) {
+ case PM_SUSPEND:
+ nmi_stop();
+ break;
+ case PM_RESUME:
+ nmi_start();
+ break;
+ }
+ return 0;
+}
+
+
+// FIXME: kernel_only
+static int nmi_callback(struct pt_regs * regs, int cpu)
+{
+ return (model->check_ctrs(cpu, &cpu_msrs[cpu], regs));
+}
+
+
+static void nmi_save_registers(struct op_msrs * msrs)
+{
+ unsigned int const nr_ctrs = model->num_counters;
+ unsigned int const nr_ctrls = model->num_controls;
+ struct op_msr_group * counters = &msrs->counters;
+ struct op_msr_group * controls = &msrs->controls;
+ int i;
+
+ for (i = 0; i < nr_ctrs; ++i) {
+ rdmsr(counters->addrs[i],
+ counters->saved[i].low,
+ counters->saved[i].high);
+ }
+
+ for (i = 0; i < nr_ctrls; ++i) {
+ rdmsr(controls->addrs[i],
+ controls->saved[i].low,
+ controls->saved[i].high);
+ }
+}
+
+
+static void nmi_cpu_setup(void * dummy)
+{
+ int cpu = smp_processor_id();
+ struct op_msrs * msrs = &cpu_msrs[cpu];
+ model->fill_in_addresses(msrs);
+ nmi_save_registers(msrs);
+ spin_lock(&oprofilefs_lock);
+ model->setup_ctrs(msrs);
+ spin_unlock(&oprofilefs_lock);
+ saved_lvtpc[cpu] = apic_read(APIC_LVTPC);
+ apic_write(APIC_LVTPC, APIC_DM_NMI);
+}
+
+
+static int nmi_setup(void)
+{
+ /* We walk a thin line between law and rape here.
+ * We need to be careful to install our NMI handler
+ * without actually triggering any NMIs as this will
+ * break the core code horrifically.
+ */
+ smp_call_function(nmi_cpu_setup, NULL, 0, 1);
+ nmi_cpu_setup(0);
+ set_nmi_callback(nmi_callback);
+ oprofile_pmdev = set_nmi_pm_callback(oprofile_pm_callback);
+ return 0;
+}
+
+
+static void nmi_restore_registers(struct op_msrs * msrs)
+{
+ unsigned int const nr_ctrs = model->num_counters;
+ unsigned int const nr_ctrls = model->num_controls;
+ struct op_msr_group * counters = &msrs->counters;
+ struct op_msr_group * controls = &msrs->controls;
+ int i;
+
+ for (i = 0; i < nr_ctrls; ++i) {
+ wrmsr(controls->addrs[i],
+ controls->saved[i].low,
+ controls->saved[i].high);
+ }
+
+ for (i = 0; i < nr_ctrs; ++i) {
+ wrmsr(counters->addrs[i],
+ counters->saved[i].low,
+ counters->saved[i].high);
+ }
+}
+
+
+static void nmi_cpu_shutdown(void * dummy)
+{
+ int cpu = smp_processor_id();
+ struct op_msrs * msrs = &cpu_msrs[cpu];
+ apic_write(APIC_LVTPC, saved_lvtpc[cpu]);
+ nmi_restore_registers(msrs);
+}
+
+
+static void nmi_shutdown(void)
+{
+ unset_nmi_pm_callback(oprofile_pmdev);
+ unset_nmi_callback();
+ smp_call_function(nmi_cpu_shutdown, NULL, 0, 1);
+ nmi_cpu_shutdown(0);
+}
+
+
+static void nmi_cpu_start(void * dummy)
+{
+ struct op_msrs const * msrs = &cpu_msrs[smp_processor_id()];
+ model->start(msrs);
+}
+
+
+static int nmi_start(void)
+{
+ smp_call_function(nmi_cpu_start, NULL, 0, 1);
+ nmi_cpu_start(0);
+ return 0;
+}
+
+
+static void nmi_cpu_stop(void * dummy)
+{
+ struct op_msrs const * msrs = &cpu_msrs[smp_processor_id()];
+ model->stop(msrs);
+}
+
+
+static void nmi_stop(void)
+{
+ smp_call_function(nmi_cpu_stop, NULL, 0, 1);
+ nmi_cpu_stop(0);
+}
+
+
+struct op_counter_config counter_config[OP_MAX_COUNTER];
+
+static int nmi_create_files(struct super_block * sb, struct dentry * root)
+{
+ int i;
+
+ for (i = 0; i < model->num_counters; ++i) {
+ struct dentry * dir;
+ char buf[2];
+
+ snprintf(buf, 2, "%d", i);
+ dir = oprofilefs_mkdir(sb, root, buf);
+ oprofilefs_create_ulong(sb, dir, "enabled", &counter_config[i].enabled);
+ oprofilefs_create_ulong(sb, dir, "event", &counter_config[i].event);
+ oprofilefs_create_ulong(sb, dir, "count", &counter_config[i].count);
+ oprofilefs_create_ulong(sb, dir, "unit_mask", &counter_config[i].unit_mask);
+ oprofilefs_create_ulong(sb, dir, "kernel", &counter_config[i].kernel);
+ oprofilefs_create_ulong(sb, dir, "user", &counter_config[i].user);
+ }
+
+ oprofilefs_create_ulong(sb, root, "kernel_only", &kernel_only);
+ return 0;
+}
+
+
+struct oprofile_operations nmi_ops = {
+ .create_files = nmi_create_files,
+ .setup = nmi_setup,
+ .shutdown = nmi_shutdown,
+ .start = nmi_start,
+ .stop = nmi_stop
+};
+
+
+int __init nmi_init(struct oprofile_operations ** ops, enum oprofile_cpu * cpu)
+{
+ __u8 vendor = current_cpu_data.x86_vendor;
+ __u8 family = current_cpu_data.x86;
+ __u8 cpu_model = current_cpu_data.x86_model;
+
+ if (!cpu_has_apic)
+ return 0;
+
+ switch (vendor) {
+ case X86_VENDOR_AMD:
+ /* Needs to be at least an Athlon (or hammer in 32bit mode) */
+ if (family < 6)
+ return 0;
+ model = &op_athlon_spec;
+ *cpu = OPROFILE_CPU_ATHLON;
+ break;
+
+ case X86_VENDOR_INTEL:
+ /* Less than a P6-class processor */
+ if (family != 6)
+ return 0;
+
+ if (cpu_model > 5) {
+ *cpu = OPROFILE_CPU_PIII;
+ } else if (cpu_model > 2) {
+ *cpu = OPROFILE_CPU_PII;
+ } else {
+ *cpu = OPROFILE_CPU_PPRO;
+ }
+
+ model = &op_ppro_spec;
+ break;
+
+ default:
+ return 0;
+ }
+
+ *ops = &nmi_ops;
+ printk(KERN_INFO "oprofile: using NMI interrupt.\n");
+ return 1;
+}
diff -X dontdiff -Naur linux-linus/arch/i386/oprofile/op_counter.h linux-linus2/arch/i386/oprofile/op_counter.h
--- linux-linus/arch/i386/oprofile/op_counter.h Thu Jan 1 01:00:00 1970
+++ linux-linus2/arch/i386/oprofile/op_counter.h Tue Oct 15 23:10:31 2002
@@ -0,0 +1,29 @@
+/**
+ * @file op_counter.h
+ *
+ * @remark Copyright 2002 OProfile authors
+ * @remark Read the file COPYING
+ *
+ * @author John Levon
+ */
+
+#ifndef OP_COUNTER_H
+#define OP_COUNTER_H
+
+#define OP_MAX_COUNTER 4
+
+/* Per-perfctr configuration as set via
+ * oprofilefs.
+ */
+struct op_counter_config {
+ unsigned long count;
+ unsigned long enabled;
+ unsigned long event;
+ unsigned long kernel;
+ unsigned long user;
+ unsigned long unit_mask;
+};
+
+extern struct op_counter_config counter_config[];
+
+#endif /* OP_COUNTER_H */
diff -X dontdiff -Naur linux-linus/arch/i386/oprofile/op_model_athlon.c linux-linus2/arch/i386/oprofile/op_model_athlon.c
--- linux-linus/arch/i386/oprofile/op_model_athlon.c Thu Jan 1 01:00:00 1970
+++ linux-linus2/arch/i386/oprofile/op_model_athlon.c Tue Oct 15 23:10:31 2002
@@ -0,0 +1,149 @@
+/**
+ * @file op_model_athlon.h
+ * athlon / K7 model-specific MSR operations
+ *
+ * @remark Copyright 2002 OProfile authors
+ * @remark Read the file COPYING
+ *
+ * @author John Levon
+ * @author Philippe Elie
+ * @author Graydon Hoare
+ */
+
+#include <linux/oprofile.h>
+#include <asm/ptrace.h>
+#include <asm/msr.h>
+
+#include "op_x86_model.h"
+#include "op_counter.h"
+
+#define NUM_COUNTERS 4
+#define NUM_CONTROLS 4
+
+#define CTR_READ(l,h,msrs,c) do {rdmsr(msrs->counters.addrs[(c)], (l), (h));} while (0)
+#define CTR_WRITE(l,msrs,c) do {wrmsr(msrs->counters.addrs[(c)], -(unsigned int)(l), -1);} while (0)
+#define CTR_OVERFLOWED(n) (!((n) & (1U<<31)))
+
+#define CTRL_READ(l,h,msrs,c) do {rdmsr(msrs->controls.addrs[(c)], (l), (h));} while (0)
+#define CTRL_WRITE(l,h,msrs,c) do {wrmsr(msrs->controls.addrs[(c)], (l), (h));} while (0)
+#define CTRL_SET_ACTIVE(n) (n |= (1<<22))
+#define CTRL_SET_INACTIVE(n) (n &= ~(1<<22))
+#define CTRL_CLEAR(x) (x &= (1<<21))
+#define CTRL_SET_ENABLE(val) (val |= 1<<20)
+#define CTRL_SET_USR(val,u) (val |= ((u & 1) << 16))
+#define CTRL_SET_KERN(val,k) (val |= ((k & 1) << 17))
+#define CTRL_SET_UM(val, m) (val |= (m << 8))
+#define CTRL_SET_EVENT(val, e) (val |= e)
+
+static unsigned long reset_value[NUM_COUNTERS];
+
+static void athlon_fill_in_addresses(struct op_msrs * const msrs)
+{
+ msrs->counters.addrs[0] = MSR_K7_PERFCTR0;
+ msrs->counters.addrs[1] = MSR_K7_PERFCTR1;
+ msrs->counters.addrs[2] = MSR_K7_PERFCTR2;
+ msrs->counters.addrs[3] = MSR_K7_PERFCTR3;
+
+ msrs->controls.addrs[0] = MSR_K7_EVNTSEL0;
+ msrs->controls.addrs[1] = MSR_K7_EVNTSEL1;
+ msrs->controls.addrs[2] = MSR_K7_EVNTSEL2;
+ msrs->controls.addrs[3] = MSR_K7_EVNTSEL3;
+}
+
+
+static void athlon_setup_ctrs(struct op_msrs const * const msrs)
+{
+ unsigned int low, high;
+ int i;
+
+ /* clear all counters */
+ for (i = 0 ; i < NUM_CONTROLS; ++i) {
+ CTRL_READ(low, high, msrs, i);
+ CTRL_CLEAR(low);
+ CTRL_WRITE(low, high, msrs, i);
+ }
+
+ /* avoid a false detection of ctr overflows in NMI handler */
+ for (i = 0; i < NUM_COUNTERS; ++i) {
+ CTR_WRITE(1, msrs, i);
+ }
+
+ /* enable active counters */
+ for (i = 0; i < NUM_COUNTERS; ++i) {
+ if (counter_config[i].event) {
+ reset_value[i] = counter_config[i].count;
+
+ CTR_WRITE(counter_config[i].count, msrs, i);
+
+ CTRL_READ(low, high, msrs, i);
+ CTRL_CLEAR(low);
+ CTRL_SET_ENABLE(low);
+ CTRL_SET_USR(low, counter_config[i].user);
+ CTRL_SET_KERN(low, counter_config[i].kernel);
+ CTRL_SET_UM(low, counter_config[i].unit_mask);
+ CTRL_SET_EVENT(low, counter_config[i].event);
+ CTRL_WRITE(low, high, msrs, i);
+ } else {
+ reset_value[i] = 0;
+ }
+ }
+}
+
+
+static int athlon_check_ctrs(unsigned int const cpu,
+ struct op_msrs const * const msrs,
+ struct pt_regs * const regs)
+{
+ unsigned int low, high;
+ int handled = 0;
+ int i;
+ for (i = 0 ; i < NUM_COUNTERS; ++i) {
+ CTR_READ(low, high, msrs, i);
+ if (CTR_OVERFLOWED(low)) {
+ oprofile_add_sample(regs->eip, i, cpu);
+ CTR_WRITE(reset_value[i], msrs, i);
+ handled = 1;
+ }
+ }
+ return handled;
+}
+
+
+static void athlon_start(struct op_msrs const * const msrs)
+{
+ unsigned int low, high;
+ int i;
+ for (i = 0 ; i < NUM_COUNTERS ; ++i) {
+ if (reset_value[i]) {
+ CTRL_READ(low, high, msrs, i);
+ CTRL_SET_ACTIVE(low);
+ CTRL_WRITE(low, high, msrs, i);
+ }
+ }
+}
+
+
+static void athlon_stop(struct op_msrs const * const msrs)
+{
+ unsigned int low,high;
+ int i;
+
+ /* Subtle: stop on all counters to avoid race with
+ * setting our pm callback */
+ for (i = 0 ; i < NUM_COUNTERS ; ++i) {
+ CTRL_READ(low, high, msrs, i);
+ CTRL_SET_INACTIVE(low);
+ CTRL_WRITE(low, high, msrs, i);
+ }
+}
+
+
+struct op_x86_model_spec const op_athlon_spec = {
+ .num_counters = NUM_COUNTERS,
+ .num_controls = NUM_CONTROLS,
+ .fill_in_addresses = &athlon_fill_in_addresses,
+ .setup_ctrs = &athlon_setup_ctrs,
+ .check_ctrs = &athlon_check_ctrs,
+ .start = &athlon_start,
+ .stop = &athlon_stop
+};
diff -X dontdiff -Naur linux-linus/arch/i386/oprofile/op_model_ppro.c linux-linus2/arch/i386/oprofile/op_model_ppro.c
--- linux-linus/arch/i386/oprofile/op_model_ppro.c Thu Jan 1 01:00:00 1970
+++ linux-linus2/arch/i386/oprofile/op_model_ppro.c Tue Oct 15 23:10:31 2002
@@ -0,0 +1,133 @@
+/**
+ * @file op_model_ppro.h
+ * pentium pro / P6 model-specific MSR operations
+ *
+ * @remark Copyright 2002 OProfile authors
+ * @remark Read the file COPYING
+ *
+ * @author John Levon
+ * @author Philippe Elie
+ * @author Graydon Hoare
+ */
+
+#include <linux/oprofile.h>
+#include <asm/ptrace.h>
+#include <asm/msr.h>
+
+#include "op_x86_model.h"
+#include "op_counter.h"
+
+#define NUM_COUNTERS 2
+#define NUM_CONTROLS 2
+
+#define CTR_READ(l,h,msrs,c) do {rdmsr(msrs->counters.addrs[(c)], (l), (h));} while (0)
+#define CTR_WRITE(l,msrs,c) do {wrmsr(msrs->counters.addrs[(c)], -(u32)(l), -1);} while (0)
+#define CTR_OVERFLOWED(n) (!((n) & (1U<<31)))
+
+#define CTRL_READ(l,h,msrs,c) do {rdmsr((msrs->controls.addrs[(c)]), (l), (h));} while (0)
+#define CTRL_WRITE(l,h,msrs,c) do {wrmsr((msrs->controls.addrs[(c)]), (l), (h));} while (0)
+#define CTRL_SET_ACTIVE(n) (n |= (1<<22))
+#define CTRL_SET_INACTIVE(n) (n &= ~(1<<22))
+#define CTRL_CLEAR(x) (x &= (1<<21))
+#define CTRL_SET_ENABLE(val) (val |= 1<<20)
+#define CTRL_SET_USR(val,u) (val |= ((u & 1) << 16))
+#define CTRL_SET_KERN(val,k) (val |= ((k & 1) << 17))
+#define CTRL_SET_UM(val, m) (val |= (m << 8))
+#define CTRL_SET_EVENT(val, e) (val |= e)
+
+static unsigned long reset_value[NUM_COUNTERS];
+
+static void ppro_fill_in_addresses(struct op_msrs * const msrs)
+{
+ msrs->counters.addrs[0] = MSR_P6_PERFCTR0;
+ msrs->counters.addrs[1] = MSR_P6_PERFCTR1;
+
+ msrs->controls.addrs[0] = MSR_P6_EVNTSEL0;
+ msrs->controls.addrs[1] = MSR_P6_EVNTSEL1;
+}
+
+
+static void ppro_setup_ctrs(struct op_msrs const * const msrs)
+{
+ unsigned int low, high;
+ int i;
+
+ /* clear all counters */
+ for (i = 0 ; i < NUM_CONTROLS; ++i) {
+ CTRL_READ(low, high, msrs, i);
+ CTRL_CLEAR(low);
+ CTRL_WRITE(low, high, msrs, i);
+ }
+
+ /* avoid a false detection of ctr overflows in NMI handler */
+ for (i = 0; i < NUM_COUNTERS; ++i) {
+ CTR_WRITE(1, msrs, i);
+ }
+
+ /* enable active counters */
+ for (i = 0; i < NUM_COUNTERS; ++i) {
+ if (counter_config[i].event) {
+ reset_value[i] = counter_config[i].count;
+
+ CTR_WRITE(counter_config[i].count, msrs, i);
+
+ CTRL_READ(low, high, msrs, i);
+ CTRL_CLEAR(low);
+ CTRL_SET_ENABLE(low);
+ CTRL_SET_USR(low, counter_config[i].user);
+ CTRL_SET_KERN(low, counter_config[i].kernel);
+ CTRL_SET_UM(low, counter_config[i].unit_mask);
+ CTRL_SET_EVENT(low, counter_config[i].event);
+ CTRL_WRITE(low, high, msrs, i);
+ }
+ }
+}
+
+
+static int ppro_check_ctrs(unsigned int const cpu,
+ struct op_msrs const * const msrs,
+ struct pt_regs * const regs)
+{
+ unsigned int low, high;
+ int i;
+ int handled = 0;
+
+ for (i = 0 ; i < NUM_COUNTERS; ++i) {
+ CTR_READ(low, high, msrs, i);
+ if (CTR_OVERFLOWED(low)) {
+ oprofile_add_sample(regs->eip, i, cpu);
+ CTR_WRITE(reset_value[i], msrs, i);
+ handled = 1;
+ }
+ }
+ return handled;
+}
+
+
+static void ppro_start(struct op_msrs const * const msrs)
+{
+ unsigned int low,high;
+ CTRL_READ(low, high, msrs, 0);
+ CTRL_SET_ACTIVE(low);
+ CTRL_WRITE(low, high, msrs, 0);
+}
+
+
+static void ppro_stop(struct op_msrs const * const msrs)
+{
+ unsigned int low,high;
+ CTRL_READ(low, high, msrs, 0);
+ CTRL_SET_INACTIVE(low);
+ CTRL_WRITE(low, high, msrs, 0);
+}
+
+
+struct op_x86_model_spec const op_ppro_spec = {
+ .num_counters = NUM_COUNTERS,
+ .num_controls = NUM_CONTROLS,
+ .fill_in_addresses = &ppro_fill_in_addresses,
+ .setup_ctrs = &ppro_setup_ctrs,
+ .check_ctrs = &ppro_check_ctrs,
+ .start = &ppro_start,
+ .stop = &ppro_stop
+};
diff -X dontdiff -Naur linux-linus/arch/i386/oprofile/op_x86_model.h linux-linus2/arch/i386/oprofile/op_x86_model.h
--- linux-linus/arch/i386/oprofile/op_x86_model.h Thu Jan 1 01:00:00 1970
+++ linux-linus2/arch/i386/oprofile/op_x86_model.h Tue Oct 15 23:10:31 2002
@@ -0,0 +1,52 @@
+/**
+ * @file op_x86_model.h
+ * interface to x86 model-specific MSR operations
+ *
+ * @remark Copyright 2002 OProfile authors
+ * @remark Read the file COPYING
+ *
+ * @author Graydon Hoare
+ */
+
+#ifndef OP_X86_MODEL_H
+#define OP_X86_MODEL_H
+
+/* will need re-working for Pentium IV */
+#define MAX_MSR 4
+
+struct op_saved_msr {
+ unsigned int high;
+ unsigned int low;
+};
+
+struct op_msr_group {
+ unsigned int addrs[MAX_MSR];
+ struct op_saved_msr saved[MAX_MSR];
+};
+
+struct op_msrs {
+ struct op_msr_group counters;
+ struct op_msr_group controls;
+};
+
+struct pt_regs;
+
+/* The model vtable abstracts the differences between
+ * various x86 CPU model's perfctr support.
+ */
+struct op_x86_model_spec {
+ unsigned int const num_counters;
+ unsigned int const num_controls;
+ void (*fill_in_addresses)(struct op_msrs * const msrs);
+ void (*setup_ctrs)(struct op_msrs const * const msrs);
+ int (*check_ctrs)(unsigned int const cpu,
+ struct op_msrs const * const msrs,
+ struct pt_regs * const regs);
+ void (*start)(struct op_msrs const * const msrs);
+ void (*stop)(struct op_msrs const * const msrs);
+};
+
+extern struct op_x86_model_spec const op_ppro_spec;
+extern struct op_x86_model_spec const op_athlon_spec;
+
+#endif /* OP_X86_MODEL_H */
diff -X dontdiff -Naur linux-linus/arch/i386/oprofile/timer_int.c linux-linus2/arch/i386/oprofile/timer_int.c
--- linux-linus/arch/i386/oprofile/timer_int.c Thu Jan 1 01:00:00 1970
+++ linux-linus2/arch/i386/oprofile/timer_int.c Tue Oct 15 23:10:31 2002
@@ -0,0 +1,57 @@
+/**
+ * @file timer_int.c
+ *
+ * @remark Copyright 2002 OProfile authors
+ * @remark Read the file COPYING
+ *
+ * @author John Levon <[email protected]>
+ */
+
+#include <linux/kernel.h>
+#include <linux/notifier.h>
+#include <linux/smp.h>
+#include <linux/irq.h>
+#include <linux/oprofile.h>
+#include <asm/ptrace.h>
+
+#include "op_counter.h"
+
+static int timer_notify(struct notifier_block * self, unsigned long val, void * data)
+{
+ struct pt_regs * regs = (struct pt_regs *)data;
+ int cpu = smp_processor_id();
+
+ oprofile_add_sample(regs->eip, 0, cpu);
+ return 0;
+}
+
+
+static struct notifier_block timer_notifier = {
+ .notifier_call = timer_notify,
+};
+
+
+static int timer_start(void)
+{
+ return register_profile_notifier(&timer_notifier);
+}
+
+
+static void timer_stop(void)
+{
+ unregister_profile_notifier(&timer_notifier);
+}
+
+
+static struct oprofile_operations timer_ops = {
+ .start = timer_start,
+ .stop = timer_stop
+};
+
+
+void __init timer_init(struct oprofile_operations ** ops, enum oprofile_cpu * cpu)
+{
+ *ops = &timer_ops;
+ *cpu = OPROFILE_CPU_TIMER;
+ printk(KERN_INFO "oprofile: using timer interrupt.\n");
+}