sw/device/lib/util.h

/*
 * Copyright 2023 Google LLC
 *
 * 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
 *
 *      http://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 SW_DEVICE_LIB_UTIL_H_
#define SW_DEVICE_LIB_UTIL_H_

#include <stdbool.h>
#include <stdint.h>

#ifndef MIN
#define MIN(X, Y) (X < Y ? X : Y)
#endif

inline void cycle_count_enable(bool enable) {
    unsigned int val = enable ? 0x0 : 0xFFFFFFFF;
    asm volatile("csrw 0x320, %0" : : "r"(val));
}

inline uint32_t cycle_count_read(void) {
    uint32_t ret;
    asm volatile("csrr %0, mcycle" : "=r"(ret));
    return ret;
}

#endif  // SW_DEVICE_LIB_UTIL_H_