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/*
* arch/metag/oprofile/common.c
*
* Copyright (C) 2013 Imagination Technologies Ltd.
*
* Based on arch/sh/oprofile/common.c:
*
* Copyright (C) 2003 - 2010 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/errno.h>
#include <linux/init.h>
#include <linux/oprofile.h>
#include <linux/perf_event.h>
#include <linux/slab.h>
#include "backtrace.h"
#ifdef CONFIG_HW_PERF_EVENTS
/*
* This will need to be reworked when multiple PMUs are supported.
*/
static char *metag_pmu_op_name;
char *op_name_from_perf_id(void)
{
return metag_pmu_op_name;
}
int __init oprofile_arch_init(struct oprofile_operations *ops)
{
ops->backtrace = metag_backtrace;
if (perf_num_counters() == 0)
return -ENODEV;
metag_pmu_op_name = kasprintf(GFP_KERNEL, "metag/%s",
perf_pmu_name());
if (unlikely(!metag_pmu_op_name))
return -ENOMEM;
return oprofile_perf_init(ops);
}
void oprofile_arch_exit(void)
{
oprofile_perf_exit();
kfree(metag_pmu_op_name);
}
#else
int __init oprofile_arch_init(struct oprofile_operations *ops)
{
ops->backtrace = metag_backtrace;
/* fall back to timer interrupt PC sampling */
return -ENODEV;
}
void oprofile_arch_exit(void) {}
#endif /* CONFIG_HW_PERF_EVENTS */
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