1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
162 lines
3.6 KiB
C
162 lines
3.6 KiB
C
/*
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* PPC 32 oprofile support
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* Based on PPC64 oprofile support
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* Copyright (C) 2004 Anton Blanchard <anton@au.ibm.com>, IBM
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*
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* Copyright (C) Freescale Semiconductor, Inc 2004
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*
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* Author: Andy Fleming
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/oprofile.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/smp.h>
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#include <linux/errno.h>
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#include <asm/ptrace.h>
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#include <asm/system.h>
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#include <asm/perfmon.h>
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#include <asm/cputable.h>
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#include "op_impl.h"
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static struct op_ppc32_model *model;
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static struct op_counter_config ctr[OP_MAX_COUNTER];
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static struct op_system_config sys;
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static void op_handle_interrupt(struct pt_regs *regs)
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{
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model->handle_interrupt(regs, ctr);
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}
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static int op_ppc32_setup(void)
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{
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/* Install our interrupt handler into the existing hook. */
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if(request_perfmon_irq(&op_handle_interrupt))
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return -EBUSY;
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mb();
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/* Pre-compute the values to stuff in the hardware registers. */
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model->reg_setup(ctr, &sys, model->num_counters);
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#if 0
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/* FIXME: Make multi-cpu work */
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/* Configure the registers on all cpus. */
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on_each_cpu(model->reg_setup, NULL, 0, 1);
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#endif
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return 0;
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}
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static void op_ppc32_shutdown(void)
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{
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mb();
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/* Remove our interrupt handler. We may be removing this module. */
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free_perfmon_irq();
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}
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static void op_ppc32_cpu_start(void *dummy)
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{
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model->start(ctr);
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}
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static int op_ppc32_start(void)
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{
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on_each_cpu(op_ppc32_cpu_start, NULL, 0, 1);
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return 0;
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}
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static inline void op_ppc32_cpu_stop(void *dummy)
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{
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model->stop();
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}
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static void op_ppc32_stop(void)
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{
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on_each_cpu(op_ppc32_cpu_stop, NULL, 0, 1);
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}
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static int op_ppc32_create_files(struct super_block *sb, struct dentry *root)
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{
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int i;
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for (i = 0; i < model->num_counters; ++i) {
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struct dentry *dir;
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char buf[3];
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snprintf(buf, sizeof buf, "%d", i);
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dir = oprofilefs_mkdir(sb, root, buf);
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oprofilefs_create_ulong(sb, dir, "enabled", &ctr[i].enabled);
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oprofilefs_create_ulong(sb, dir, "event", &ctr[i].event);
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oprofilefs_create_ulong(sb, dir, "count", &ctr[i].count);
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oprofilefs_create_ulong(sb, dir, "kernel", &ctr[i].kernel);
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oprofilefs_create_ulong(sb, dir, "user", &ctr[i].user);
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/* FIXME: Not sure if this is used */
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oprofilefs_create_ulong(sb, dir, "unit_mask", &ctr[i].unit_mask);
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}
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oprofilefs_create_ulong(sb, root, "enable_kernel", &sys.enable_kernel);
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oprofilefs_create_ulong(sb, root, "enable_user", &sys.enable_user);
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/* Default to tracing both kernel and user */
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sys.enable_kernel = 1;
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sys.enable_user = 1;
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return 0;
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}
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static struct oprofile_operations oprof_ppc32_ops = {
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.create_files = op_ppc32_create_files,
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.setup = op_ppc32_setup,
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.shutdown = op_ppc32_shutdown,
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.start = op_ppc32_start,
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.stop = op_ppc32_stop,
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.cpu_type = NULL /* To be filled in below. */
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};
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int __init oprofile_arch_init(struct oprofile_operations *ops)
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{
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char *name;
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int cpu_id = smp_processor_id();
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#ifdef CONFIG_FSL_BOOKE
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model = &op_model_fsl_booke;
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#else
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return -ENODEV;
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#endif
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name = kmalloc(32, GFP_KERNEL);
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if (NULL == name)
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return -ENOMEM;
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sprintf(name, "ppc/%s", cur_cpu_spec[cpu_id]->cpu_name);
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oprof_ppc32_ops.cpu_type = name;
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model->num_counters = cur_cpu_spec[cpu_id]->num_pmcs;
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*ops = oprof_ppc32_ops;
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printk(KERN_INFO "oprofile: using %s performance monitoring.\n",
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oprof_ppc32_ops.cpu_type);
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return 0;
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}
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void oprofile_arch_exit(void)
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{
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kfree(oprof_ppc32_ops.cpu_type);
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oprof_ppc32_ops.cpu_type = NULL;
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}
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