profiler.h

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/*
 * Copyright (c) 2016 The University of Manchester
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
 
#ifndef PROFILER_H
#define PROFILER_H
 
#define PROFILER_N_HEADER_WORDS 1
 
//---------------------------------------
// Declared functions
//---------------------------------------
 
void profiler_init(uint32_t* data_region);
 
void profiler_finalise(void);
 
struct profiler_region {
    uint32_t count;
    uint32_t samples[];
};
 
struct profiler_state {
    uint32_t *count;
    uint32_t samples_remaining;
    uint32_t *output;
};
 
#ifdef PROFILER_ENABLED
 
#include <stdint.h>
#include <spin1_api.h>
 
//---------------------------------------
// Macros
//---------------------------------------
 
enum profiler_event {
    PROFILER_ENTER = 1 << 31,
    PROFILER_EXIT = 0
};
 
//---------------------------------------
// Externals
//---------------------------------------
 
extern struct profiler_state profiler_state;
 
//---------------------------------------
// Inline functions
//---------------------------------------
 
static inline void profiler_write_entry(uint32_t tag) {
    if (profiler_state.samples_remaining > 0) {
        *profiler_state.output++ = tc[T2_COUNT];
        *profiler_state.output++ = tag;
        profiler_state.samples_remaining--;
    }
}
 
static inline void profiler_write_entry_disable_irq_fiq(uint32_t tag) {
    uint sr = spin1_irq_disable();
    spin1_fiq_disable();
    profiler_write_entry(tag);
    spin1_mode_restore(sr);
}
 
static inline void profiler_write_entry_disable_fiq(uint32_t tag) {
    uint sr = spin1_fiq_disable();
    profiler_write_entry(tag);
    spin1_mode_restore(sr);
}
#else // PROFILER_ENABLED
 
static inline void __profiler_skip(void) { return; }
 
#define profiler_write_entry(tag) __profiler_skip()
#define profiler_write_entry_disable_irq_fiq(tag) __profiler_skip()
#define profiler_write_entry_disable_fiq(tag) __profiler_skip()
 
#endif  // PROFILER_ENABLED
 
#endif  // PROFILER_H