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+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef POWER_MANAGER_H_
+#define POWER_MANAGER_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Maximum number of CPUS to manage */
+#define POWER_MGR_MAX_CPUS 64
+/**
+ * Initialize power management.
+ * Initializes resources and verifies the number of CPUs on the system.
+ * Wraps librte_power int rte_power_init(unsigned lcore_id);
+ *
+ * @return
+ * - 0 on success.
+ * - Negative on error.
+ */
+int power_manager_init(void);
+
+/**
+ * Exit power management. Must be called prior to exiting the application.
+ *
+ * @return
+ * - 0 on success.
+ * - Negative on error.
+ */
+int power_manager_exit(void);
+
+/**
+ * Scale up the frequency of the cores specified in core_mask.
+ * It is thread-safe.
+ *
+ * @param core_mask
+ * The uint64_t bit-mask of cores to change frequency.
+ *
+ * @return
+ * - 1 on success.
+ * - Negative on error.
+ */
+int power_manager_scale_mask_up(uint64_t core_mask);
+
+/**
+ * Scale down the frequency of the cores specified in core_mask.
+ * It is thread-safe.
+ *
+ * @param core_mask
+ * The uint64_t bit-mask of cores to change frequency.
+ *
+ * @return
+ * - 1 on success.
+ * - Negative on error.
+ */
+int power_manager_scale_mask_down(uint64_t core_mask);
+
+/**
+ * Scale to the minimum frequency of the cores specified in core_mask.
+ * It is thread-safe.
+ *
+ * @param core_mask
+ * The uint64_t bit-mask of cores to change frequency.
+ *
+ * @return
+ * - 1 on success.
+ * - Negative on error.
+ */
+int power_manager_scale_mask_min(uint64_t core_mask);
+
+/**
+ * Scale to the maximum frequency of the cores specified in core_mask.
+ * It is thread-safe.
+ *
+ * @param core_mask
+ * The uint64_t bit-mask of cores to change frequency.
+ *
+ * @return
+ * - 1 on success.
+ * - Negative on error.
+ */
+int power_manager_scale_mask_max(uint64_t core_mask);
+
+/**
+ * Scale up frequency for the core specified by core_num.
+ * It is thread-safe.
+ *
+ * @param core_num
+ * The core number to change frequency
+ *
+ * @return
+ * - 1 on success.
+ * - Negative on error.
+ */
+int power_manager_scale_core_up(unsigned core_num);
+
+/**
+ * Scale down frequency for the core specified by core_num.
+ * It is thread-safe.
+ *
+ * @param core_num
+ * The core number to change frequency
+ *
+ * @return
+ * - 1 on success.
+ * - 0 if frequency not changed.
+ * - Negative on error.
+ */
+int power_manager_scale_core_down(unsigned core_num);
+
+/**
+ * Scale to minimum frequency for the core specified by core_num.
+ * It is thread-safe.
+ *
+ * @param core_num
+ * The core number to change frequency
+ *
+ * @return
+ * - 1 on success.
+ * - 0 if frequency not changed.
+ * - Negative on error.
+ */
+int power_manager_scale_core_min(unsigned core_num);
+
+/**
+ * Scale to maximum frequency for the core specified by core_num.
+ * It is thread-safe.
+ *
+ * @param core_num
+ * The core number to change frequency
+ *
+ * @return
+ * - 1 on success.
+ * - 0 if frequency not changed.
+ * - Negative on error.
+ */
+int power_manager_scale_core_max(unsigned core_num);
+
+/**
+ * Get the current freuency of the core specified by core_num
+ *
+ * @param core_num
+ * The core number to get the current frequency
+ *
+ * @return
+ * - 0 on error
+ * - >0 for current frequency.
+ */
+uint32_t power_manager_get_current_frequency(unsigned core_num);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif /* POWER_MANAGER_H_ */