This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / powerpc / oprofile / common.c

diff --git a/arch/powerpc/oprofile/common.c b/arch/powerpc/oprofile/common.c
new file mode 100644 (file)
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+++ b/arch/powerpc/oprofile/common.c
@@ -0,0 +1,173 @@
+/*
+ * 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>
+#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;
+
+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.  */
+       on_each_cpu(model->cpu_setup, NULL, 0, 1);
+
+       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 CONFIG_PPC64
+       /*
+        * 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
+
+       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);
+
+               /*
+                * Classic PowerPC doesn't support per-counter
+                * control like this, but the options are
+                * expected, so they remain.  For Freescale
+                * Book-E style performance monitors, we do
+                * support 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);
+
+       /* Default to tracing both kernel and user */
+       sys.enable_kernel = 1;
+       sys.enable_user = 1;
+
+       return 0;
+}
+
+int __init oprofile_arch_init(struct oprofile_operations *ops)
+{
+       if (!cur_cpu_spec->oprofile_cpu_type)
+               return -ENODEV;
+
+       switch (cur_cpu_spec->oprofile_type) {
+#ifdef CONFIG_PPC64
+               case PPC_OPROFILE_RS64:
+                       model = &op_model_rs64;
+                       break;
+               case PPC_OPROFILE_POWER4:
+                       model = &op_model_power4;
+                       break;
+#else
+               case PPC_OPROFILE_G4:
+                       model = &op_model_7450;
+                       break;
+#endif
+#ifdef CONFIG_FSL_BOOKE
+               case PPC_OPROFILE_BOOKE:
+                       model = &op_model_fsl_booke;
+                       break;
+#endif
+               default:
+                       return -ENODEV;
+       }
+
+       model->num_counters = cur_cpu_spec->num_pmcs;
+
+       ops->cpu_type = cur_cpu_spec->oprofile_cpu_type;
+       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;
+       ops->backtrace = op_powerpc_backtrace;
+
+       printk(KERN_INFO "oprofile: using %s performance monitoring.\n",
+              ops->cpu_type);
+
+       return 0;
+}
+
+void oprofile_arch_exit(void)
+{
+}