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zephyr/include/drivers/pm_cpu_ops/psci.h

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aarch64: pm_cpu_ops: Introduce pm_cpu_ops subsystem AArch64 has support for PSCI. This is especially useful for SMP because PSCI is used to power on the secordary cores. When the PSCI driver was introduced in Zephyr it was designed to rely on a very PSCI-centric subsystem / interface. There are two kinds of problems with this choice: 1. PSCI is only defined for the non-secure world and it is designed to boot CPU cores into non-secure state (that means that PSCI is only supposed to work if Zephyr is running in non-secure state) 2. There can be other ways or standards used to start / stop a core different from PSCI This patch is trying to fix the original wrong assumption by making the interface / subsystem a generic one, called 'pm_cpu_ops', and using PSCI only as an actual driver that is a user of this new interface / subsystem. For now the new subsystem is only exposing two methods: cpu_on and cpu_off, others will probably follow according to the needs. Signed-off-by: Carlo Caione <ccaione@baylibre.com>
2021-03-01 15:57:15 +08:00
/*
* Copyright 2020 Carlo Caione <ccaione@baylibre.com>
*
* SPDX-License-Identifier: Apache-2.0
*/
#ifndef ZEPHYR_INCLUDE_DRIVERS_PM_CPU_OPS_PSCI_H_
#define ZEPHYR_INCLUDE_DRIVERS_PM_CPU_OPS_PSCI_H_
#include <zephyr/types.h>
arm/arm64: Make ARM64 a standalone architecture Split ARM and ARM64 architectures. Details: - CONFIG_ARM64 is decoupled from CONFIG_ARM (not a subset anymore) - Arch and include AArch64 files are in a dedicated directory (arch/arm64 and include/arch/arm64) - AArch64 boards and SoC are moved to soc/arm64 and boards/arm64 - AArch64-specific DTS files are moved to dts/arm64 - The A72 support for the bcm_vk/viper board is moved in the boards/bcm_vk/viper directory Signed-off-by: Carlo Caione <ccaione@baylibre.com>
2021-03-25 18:56:15 +08:00
#include <arch/arm64/arm-smccc.h>
aarch64: pm_cpu_ops: Introduce pm_cpu_ops subsystem AArch64 has support for PSCI. This is especially useful for SMP because PSCI is used to power on the secordary cores. When the PSCI driver was introduced in Zephyr it was designed to rely on a very PSCI-centric subsystem / interface. There are two kinds of problems with this choice: 1. PSCI is only defined for the non-secure world and it is designed to boot CPU cores into non-secure state (that means that PSCI is only supposed to work if Zephyr is running in non-secure state) 2. There can be other ways or standards used to start / stop a core different from PSCI This patch is trying to fix the original wrong assumption by making the interface / subsystem a generic one, called 'pm_cpu_ops', and using PSCI only as an actual driver that is a user of this new interface / subsystem. For now the new subsystem is only exposing two methods: cpu_on and cpu_off, others will probably follow according to the needs. Signed-off-by: Carlo Caione <ccaione@baylibre.com>
2021-03-01 15:57:15 +08:00
#include <stddef.h>
#include <device.h>
#ifdef __cplusplus
extern "C" {
#endif
/* PSCI version decoding (independent of PSCI version) */
#define PSCI_VERSION_MAJOR_SHIFT 16
#define PSCI_VERSION_MINOR_MASK \
((1U << PSCI_VERSION_MAJOR_SHIFT) - 1)
#define PSCI_VERSION_MAJOR_MASK ~PSCI_VERSION_MINOR_MASK
#define PSCI_VERSION_MAJOR(ver) \
(((ver) & PSCI_VERSION_MAJOR_MASK) >> PSCI_VERSION_MAJOR_SHIFT)
#define PSCI_VERSION_MINOR(ver) \
((ver) & PSCI_VERSION_MINOR_MASK)
uint32_t psci_version(void);
#ifdef __cplusplus
}
#endif
#endif /* ZEPHYR_INCLUDE_DRIVERS_PM_CPU_OPS_PSCI_H_ */