1 files changed, 195 insertions, 0 deletions

diff --git a/arch/powerpc/oprofile/common.c b/arch/powerpc/oprofile/common.c
new file mode 100644
index 000000000000..af2c05d20ba5
--- /dev/null
+++ b/arch/powerpc/oprofile/common.c
@@ -0,0 +1,195 @@
+/*
+ * PPC 64 oprofile support:
+ * Copyright (C) 2004 Anton Blanchard <anton@au.ibm.com>, IBM
+ * PPC 32 oprofile support: (based on PPC 64 support)
+ * Copyright (C) Freescale Semiconductor, Inc 2004
+ *      Author: Andy Fleming
+ *
+ * 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>
+#ifndef __powerpc64__
+#include <linux/slab.h>
+#endif /* ! __powerpc64__ */
+#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 <asm/cputable.h>
+#include <asm/oprofile_impl.h>
+
+static struct op_powerpc_model *model;
+
+static struct op_counter_config ctr[OP_MAX_COUNTER];
+static struct op_system_config sys;
+
+#ifndef __powerpc64__
+static char *cpu_type;
+#endif /* ! __powerpc64__ */
+
+static void op_handle_interrupt(struct pt_regs *regs)
+{
+        model->handle_interrupt(regs, ctr);
+}
+
+static int op_powerpc_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.  */
+#ifdef __powerpc64__
+        on_each_cpu(model->cpu_setup, NULL, 0, 1);
+#else /* __powerpc64__ */
+#if 0
+        /* FIXME: Make multi-cpu work */
+        on_each_cpu(model->reg_setup, NULL, 0, 1);
+#endif
+#endif /* __powerpc64__ */
+
+        return 0;
+}
+
+static void op_powerpc_shutdown(void)
+{
+        release_pmc_hardware();
+}
+
+static void op_powerpc_cpu_start(void *dummy)
+{
+        model->start(ctr);
+}
+
+static int op_powerpc_start(void)
+{
+        on_each_cpu(op_powerpc_cpu_start, NULL, 0, 1);
+        return 0;
+}
+
+static inline void op_powerpc_cpu_stop(void *dummy)
+{
+        model->stop();
+}
+
+static void op_powerpc_stop(void)
+{
+        on_each_cpu(op_powerpc_cpu_stop, NULL, 0, 1);
+}
+
+static int op_powerpc_create_files(struct super_block *sb, struct dentry *root)
+{
+        int i;
+
+#ifdef __powerpc64__
+        /*
+         * 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);
+#endif /* __powerpc64__ */
+
+        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);
+#ifdef __powerpc64__
+                /*
+                 * We dont support per counter user/kernel selection, but
+                 * we leave the entries because userspace expects them
+                 */
+#endif /* __powerpc64__ */
+                oprofilefs_create_ulong(sb, dir, "kernel", &ctr[i].kernel);
+                oprofilefs_create_ulong(sb, dir, "user", &ctr[i].user);
+
+#ifndef __powerpc64__
+                /* FIXME: Not sure if this is used */
+#endif /* ! __powerpc64__ */
+                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);
+#ifdef __powerpc64__
+        oprofilefs_create_ulong(sb, root, "backtrace_spinlocks",
+                                &sys.backtrace_spinlocks);
+#endif /* __powerpc64__ */
+
+        /* Default to tracing both kernel and user */
+        sys.enable_kernel = 1;
+        sys.enable_user = 1;
+#ifdef __powerpc64__
+        /* Turn on backtracing through spinlocks by default */
+        sys.backtrace_spinlocks = 1;
+#endif /* __powerpc64__ */
+
+        return 0;
+}
+
+int __init oprofile_arch_init(struct oprofile_operations *ops)
+{
+#ifndef __powerpc64__
+#ifdef CONFIG_FSL_BOOKE
+        model = &op_model_fsl_booke;
+#else
+        return -ENODEV;
+#endif
+
+        cpu_type = kmalloc(32, GFP_KERNEL);
+        if (NULL == cpu_type)
+                return -ENOMEM;
+
+        sprintf(cpu_type, "ppc/%s", cur_cpu_spec->cpu_name);
+
+        model->num_counters = cur_cpu_spec->num_pmcs;
+
+        ops->cpu_type = cpu_type;
+#else /* __powerpc64__ */
+        if (!cur_cpu_spec->oprofile_model || !cur_cpu_spec->oprofile_cpu_type)
+                return -ENODEV;
+        model = cur_cpu_spec->oprofile_model;
+        model->num_counters = cur_cpu_spec->num_pmcs;
+
+        ops->cpu_type = cur_cpu_spec->oprofile_cpu_type;
+#endif /* __powerpc64__ */
+        ops->create_files = op_powerpc_create_files;
+        ops->setup = op_powerpc_setup;
+        ops->shutdown = op_powerpc_shutdown;
+        ops->start = op_powerpc_start;
+        ops->stop = op_powerpc_stop;
+
+        printk(KERN_INFO "oprofile: using %s performance monitoring.\n",
+               ops->cpu_type);
+
+        return 0;
+}
+
+void oprofile_arch_exit(void)
+{
+#ifndef __powerpc64__
+        kfree(cpu_type);
+        cpu_type = NULL;
+#endif /* ! __powerpc64__ */
+}