64 lines
1.3 KiB
C
64 lines
1.3 KiB
C
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/*
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* Copyright 2021 Carlo Caione <ccaione@baylibre.com>
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef ZEPHYR_INCLUDE_DRIVERS_PM_CPU_OPS_H_
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#define ZEPHYR_INCLUDE_DRIVERS_PM_CPU_OPS_H_
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/**
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* @file
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* @brief Public API for CPU Power Management
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*/
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#include <zephyr/types.h>
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#include <stddef.h>
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#include <device.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @defgroup power_management_cpu_api CPU Power Management
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* @{
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*/
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/**
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* @brief Power down the calling core
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*
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* This call is intended for use in hotplug. A core that is powered down by
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* cpu_off can only be powered up again in response to a cpu_on
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*
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* @retval The call does not return when successful
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* @retval -ENOTSUP If the operation is not supported
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*/
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int pm_cpu_off(void);
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/**
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* @brief Power up a core
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*
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* This call is used to power up cores that either have not yet been booted
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* into the calling supervisory software or have been previously powered down
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* with a cpu_off call
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*
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* @param cpuid CPU id to power on
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* @param entry_point Address at which the core must commence execution
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*
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* @retval 0 on success, a negative errno otherwise
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* @retval -ENOTSUP If the operation is not supported
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*/
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int pm_cpu_on(unsigned long cpuid, uintptr_t entry_point);
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#ifdef __cplusplus
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}
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#endif
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/**
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* @}
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*/
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#endif /* ZEPHYR_INCLUDE_DRIVERS_PM_CPU_OPS_H_ */
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