text: /*
   * arch/sh/oprofile/init.c
   *
   * Copyright (C) 2003 - 2008  Paul Mundt
   *
   * Based on arch/mips/oprofile/common.c:
   *
   *	Copyright (C) 2004, 2005 Ralf Baechle
   *	Copyright (C) 2005 MIPS Technologies, Inc.
   *
   * This file is subject to the terms and conditions of the GNU General Public
   * License.  See the file "COPYING" in the main directory of this archive
   * for more details.
   */
  #include <linux/kernel.h>
  #include <linux/oprofile.h>
  #include <linux/init.h>
  #include <linux/errno.h>
  #include <linux/smp.h>
  #include <asm/processor.h>
  #include "op_impl.h"
  
  extern struct op_sh_model op_model_sh7750_ops __weak;
  extern struct op_sh_model op_model_sh4a_ops __weak;
  
  static struct op_sh_model *model;
  
  static struct op_counter_config ctr[20];
  
  extern void sh_backtrace(struct pt_regs * const regs, unsigned int depth);
  
  static int op_sh_setup(void)
  {
  	/* Pre-compute the values to stuff in the hardware registers.  */
  	model->reg_setup(ctr);
  
  	/* Configure the registers on all cpus.  */
  	on_each_cpu(model->cpu_setup, NULL, 1);
  
          return 0;
  }
  
  static int op_sh_create_files(struct super_block *sb, struct dentry *root)
  {
  	int i, ret = 0;
  
  	for (i = 0; i < model->num_counters; i++) {
  		struct dentry *dir;
  		char buf[4];
  
  		snprintf(buf, sizeof(buf), "%d", i);
  		dir = oprofilefs_mkdir(sb, root, buf);
  
  		ret |= oprofilefs_create_ulong(sb, dir, "enabled", &ctr[i].enabled);
  		ret |= oprofilefs_create_ulong(sb, dir, "event", &ctr[i].event);
  		ret |= oprofilefs_create_ulong(sb, dir, "kernel", &ctr[i].kernel);
  		ret |= oprofilefs_create_ulong(sb, dir, "user", &ctr[i].user);
  
  		if (model->create_files)
  			ret |= model->create_files(sb, dir);
  		else
  			ret |= oprofilefs_create_ulong(sb, dir, "count", &ctr[i].count);
  
  		/* Dummy entries */
  		ret |= oprofilefs_create_ulong(sb, dir, "unit_mask", &ctr[i].unit_mask);
  	}
  
  	return ret;
  }
  
  static int op_sh_start(void)
  {
  	/* Enable performance monitoring for all counters.  */
  	on_each_cpu(model->cpu_start, NULL, 1);
  
  	return 0;
  }
  
  static void op_sh_stop(void)
  {
  	/* Disable performance monitoring for all counters.  */
  	on_each_cpu(model->cpu_stop, NULL, 1);
  }
  
  int __init oprofile_arch_init(struct oprofile_operations *ops)
  {
  	struct op_sh_model *lmodel = NULL;
  	int ret;
  
  	/*
  	 * Always assign the backtrace op. If the counter initialization
  	 * fails, we fall back to the timer which will still make use of
  	 * this.
  	 */
  	ops->backtrace = sh_backtrace;
  
  	switch (current_cpu_data.type) {
  	/* SH-4 types */
  	case CPU_SH7750:
  	case CPU_SH7750S:
  		lmodel = &op_model_sh7750_ops;
  		break;
  
          /* SH-4A types */
  	case CPU_SH7763:
  	case CPU_SH7770:
  	case CPU_SH7780:
  	case CPU_SH7781:
  	case CPU_SH7785:
  	case CPU_SH7786:
  	case CPU_SH7723:
  	case CPU_SH7724:
  	case CPU_SHX3:
  		lmodel = &op_model_sh4a_ops;
  		break;
  
  	/* SH4AL-DSP types */
  	case CPU_SH7343:
  	case CPU_SH7722:
  	case CPU_SH7366:
  		lmodel = &op_model_sh4a_ops;
  		break;
  	}
  
  	if (!lmodel)
  		return -ENODEV;
  	if (!(current_cpu_data.flags & CPU_HAS_PERF_COUNTER))
  		return -ENODEV;
  
  	ret = lmodel->init();
  	if (unlikely(ret != 0))
  		return ret;
  
  	model = lmodel;
  
  	ops->setup		= op_sh_setup;
  	ops->create_files	= op_sh_create_files;
  	ops->start		= op_sh_start;
  	ops->stop		= op_sh_stop;
  	ops->cpu_type		= lmodel->cpu_type;
  
  	printk(KERN_INFO "oprofile: using %s performance monitoring.\n",
  	       lmodel->cpu_type);
  
  	return 0;
  }
  
  void oprofile_arch_exit(void)
  {
  	if (model && model->exit)
  		model->exit();
  }
  