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authorStephen Rothwell <sfr@canb.auug.org.au>2005-09-19 23:24:08 +1000
committerPaul Mackerras <paulus@samba.org>2005-09-21 19:21:08 +1000
commit86a5cddbd9676b129cfa2ed7a1a11759d3b2b512 (patch)
tree7d5d4fdda4df9067c43870f5dcb3d5c714fdf227 /arch/powerpc/oprofile/common.c
parent654810ec899ea5f2fc2138fca1793b603d481ff4 (diff)
downloadlinaro-lsk-86a5cddbd9676b129cfa2ed7a1a11759d3b2b512.tar.gz
[PATCH] powerpc: merge the rest of arch/ppc*/oprofile
- merge common.c - move model specific files - remove stub Makefiles - clean up arch/ppc*/Makefile Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/oprofile/common.c')
-rw-r--r--arch/powerpc/oprofile/common.c214
1 files changed, 214 insertions, 0 deletions
diff --git a/arch/powerpc/oprofile/common.c b/arch/powerpc/oprofile/common.c
new file mode 100644
index 00000000000..486314a0def
--- /dev/null
+++ b/arch/powerpc/oprofile/common.c
@@ -0,0 +1,214 @@
+/*
+ * 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>
+#ifdef __powerpc64__
+#include <asm/pmc.h>
+#else /* __powerpc64__ */
+#include <asm/perfmon.h>
+#endif /* __powerpc64__ */
+#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)
+{
+#ifdef __powerpc64__
+ int err;
+
+ /* Grab the hardware */
+ err = reserve_pmc_hardware(op_handle_interrupt);
+ if (err)
+ return err;
+#else /* __powerpc64__ */
+ /* Install our interrupt handler into the existing hook. */
+ if (request_perfmon_irq(&op_handle_interrupt))
+ return -EBUSY;
+ mb();
+#endif /* __powerpc64__ */
+
+ /* 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)
+{
+#ifdef __powerpc64__
+ release_pmc_hardware();
+#else /* __powerpc64__ */
+ mb();
+ /* Remove our interrupt handler. We may be removing this module. */
+ free_perfmon_irq();
+#endif /* __powerpc64__ */
+}
+
+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__
+ int cpu_id = smp_processor_id();
+
+#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_id]->cpu_name);
+
+ model->num_counters = cur_cpu_spec[cpu_id]->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__ */
+}