projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 00e6c923 JH |
1 | /* |
| 2 | * arch/metag/oprofile/common.c | |
| 3 | * | |
| 4 | * Copyright (C) 2013 Imagination Technologies Ltd. | |
| 5 | * | |
| 6 | * Based on arch/sh/oprofile/common.c: | |
| 7 | * | |
| 8 | * Copyright (C) 2003 - 2010 Paul Mundt | |
| 9 | * | |
| 10 | * Based on arch/mips/oprofile/common.c: | |
| 11 | * | |
| 12 | * Copyright (C) 2004, 2005 Ralf Baechle | |
| 13 | * Copyright (C) 2005 MIPS Technologies, Inc. | |
| 14 | * | |
| 15 | * This file is subject to the terms and conditions of the GNU General Public | |
| 16 | * License. See the file "COPYING" in the main directory of this archive | |
| 17 | * for more details. | |
| 18 | */ | |
| 19 | #include <linux/errno.h> | |
| 20 | #include <linux/init.h> | |
| 21 | #include <linux/oprofile.h> | |
| 22 | #include <linux/perf_event.h> | |
| 23 | #include <linux/slab.h> | |
| 24 | ||
| 25 | #include "backtrace.h" | |
| 26 | ||
| 27 | #ifdef CONFIG_HW_PERF_EVENTS | |
| 28 | /* | |
| 29 | * This will need to be reworked when multiple PMUs are supported. | |
| 30 | */ | |
| 31 | static char *metag_pmu_op_name; | |
| 32 | ||
| 33 | char *op_name_from_perf_id(void) | |
| 34 | { | |
| 35 | return metag_pmu_op_name; | |
| 36 | } | |
| 37 | ||
| 38 | int __init oprofile_arch_init(struct oprofile_operations *ops) | |
| 39 | { | |
| 40 | ops->backtrace = metag_backtrace; | |
| 41 | ||
| 42 | if (perf_num_counters() == 0) | |
| 43 | return -ENODEV; | |
| 44 | ||
| 45 | metag_pmu_op_name = kasprintf(GFP_KERNEL, "metag/%s", | |
| 46 | perf_pmu_name()); | |
| 47 | if (unlikely(!metag_pmu_op_name)) | |
| 48 | return -ENOMEM; | |
| 49 | ||
| 50 | return oprofile_perf_init(ops); | |
| 51 | } | |
| 52 | ||
| 53 | void oprofile_arch_exit(void) | |
| 54 | { | |
| 55 | oprofile_perf_exit(); | |
| 56 | kfree(metag_pmu_op_name); | |
| 57 | } | |
| 58 | #else | |
| 59 | int __init oprofile_arch_init(struct oprofile_operations *ops) | |
| 60 | { | |
| 61 | ops->backtrace = metag_backtrace; | |
| 62 | /* fall back to timer interrupt PC sampling */ | |
| 63 | return -ENODEV; | |
| 64 | } | |
| 65 | void oprofile_arch_exit(void) {} | |
| 66 | #endif /* CONFIG_HW_PERF_EVENTS */ |