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-rw-r--r--arch/ppc64/oprofile/common.c186
1 files changed, 186 insertions, 0 deletions
diff --git a/arch/ppc64/oprofile/common.c b/arch/ppc64/oprofile/common.c
new file mode 100644
index 000000000000..b28bfda23d94
--- /dev/null
+++ b/arch/ppc64/oprofile/common.c
@@ -0,0 +1,186 @@
+/*
+ * Copyright (C) 2004 Anton Blanchard <anton@au.ibm.com>, IBM
+ *
+ * Based on alpha version.
+ *
+ * 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.
+ */
+
+#include <linux/oprofile.h>
+#include <linux/init.h>
+#include <linux/smp.h>
+#include <linux/errno.h>
+#include <asm/ptrace.h>
+#include <asm/system.h>
+#include <asm/pmc.h>
+
+#include "op_impl.h"
+
+extern struct op_ppc64_model op_model_rs64;
+extern struct op_ppc64_model op_model_power4;
+static struct op_ppc64_model *model;
+
+static struct op_counter_config ctr[OP_MAX_COUNTER];
+static struct op_system_config sys;
+
+static void op_handle_interrupt(struct pt_regs *regs)
+{
+ model->handle_interrupt(regs, ctr);
+}
+
+static int op_ppc64_setup(void)
+{
+ int err;
+
+ /* Grab the hardware */
+ err = reserve_pmc_hardware(op_handle_interrupt);
+ if (err)
+ return err;
+
+ /* Pre-compute the values to stuff in the hardware registers. */
+ model->reg_setup(ctr, &sys, model->num_counters);
+
+ /* Configure the registers on all cpus. */
+ on_each_cpu(model->cpu_setup, NULL, 0, 1);
+
+ return 0;
+}
+
+static void op_ppc64_shutdown(void)
+{
+ release_pmc_hardware();
+}
+
+static void op_ppc64_cpu_start(void *dummy)
+{
+ model->start(ctr);
+}
+
+static int op_ppc64_start(void)
+{
+ on_each_cpu(op_ppc64_cpu_start, NULL, 0, 1);
+ return 0;
+}
+
+static inline void op_ppc64_cpu_stop(void *dummy)
+{
+ model->stop();
+}
+
+static void op_ppc64_stop(void)
+{
+ on_each_cpu(op_ppc64_cpu_stop, NULL, 0, 1);
+}
+
+static int op_ppc64_create_files(struct super_block *sb, struct dentry *root)
+{
+ int i;
+
+ /*
+ * There is one mmcr0, mmcr1 and mmcra for setting the events for
+ * all of the counters.
+ */
+ oprofilefs_create_ulong(sb, root, "mmcr0", &sys.mmcr0);
+ oprofilefs_create_ulong(sb, root, "mmcr1", &sys.mmcr1);
+ oprofilefs_create_ulong(sb, root, "mmcra", &sys.mmcra);
+
+ for (i = 0; i < model->num_counters; ++i) {
+ struct dentry *dir;
+ char buf[3];
+
+ 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);
+ }
+
+ oprofilefs_create_ulong(sb, root, "enable_kernel", &sys.enable_kernel);
+ oprofilefs_create_ulong(sb, root, "enable_user", &sys.enable_user);
+ oprofilefs_create_ulong(sb, root, "backtrace_spinlocks",
+ &sys.backtrace_spinlocks);
+
+ /* Default to tracing both kernel and user */
+ sys.enable_kernel = 1;
+ sys.enable_user = 1;
+
+ /* Turn on backtracing through spinlocks by default */
+ sys.backtrace_spinlocks = 1;
+
+ return 0;
+}
+
+int __init oprofile_arch_init(struct oprofile_operations *ops)
+{
+ unsigned int pvr;
+
+ pvr = mfspr(SPRN_PVR);
+
+ switch (PVR_VER(pvr)) {
+ case PV_630:
+ case PV_630p:
+ model = &op_model_rs64;
+ model->num_counters = 8;
+ ops->cpu_type = "ppc64/power3";
+ break;
+
+ case PV_NORTHSTAR:
+ case PV_PULSAR:
+ case PV_ICESTAR:
+ case PV_SSTAR:
+ model = &op_model_rs64;
+ model->num_counters = 8;
+ ops->cpu_type = "ppc64/rs64";
+ break;
+
+ case PV_POWER4:
+ case PV_POWER4p:
+ model = &op_model_power4;
+ model->num_counters = 8;
+ ops->cpu_type = "ppc64/power4";
+ break;
+
+ case PV_970:
+ case PV_970FX:
+ model = &op_model_power4;
+ model->num_counters = 8;
+ ops->cpu_type = "ppc64/970";
+ break;
+
+ case PV_POWER5:
+ case PV_POWER5p:
+ model = &op_model_power4;
+ model->num_counters = 6;
+ ops->cpu_type = "ppc64/power5";
+ break;
+
+ default:
+ return -ENODEV;
+ }
+
+ ops->create_files = op_ppc64_create_files;
+ ops->setup = op_ppc64_setup;
+ ops->shutdown = op_ppc64_shutdown;
+ ops->start = op_ppc64_start;
+ ops->stop = op_ppc64_stop;
+
+ printk(KERN_INFO "oprofile: using %s performance monitoring.\n",
+ ops->cpu_type);
+
+ return 0;
+}
+
+void oprofile_arch_exit(void)
+{
+}