068654c200
Functions implemented on arm64 to check if a power_state parameter is valid and if the power_state implies context loss are not arm64 specific and should be moved to generic code so that they can be reused on arm systems too. This patch moves the functions handling the power_state parameter to generic PSCI firmware layer code. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: Will Deacon <will.deacon@arm.com> Acked-by: Sudeep Holla <sudeep.holla@arm.com> Tested-by: Jisheng Zhang <jszhang@marvell.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Mark Rutland <mark.rutland@arm.com>
55 lines
1.6 KiB
C
55 lines
1.6 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* Copyright (C) 2015 ARM Limited
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*/
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#ifndef __LINUX_PSCI_H
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#define __LINUX_PSCI_H
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#include <linux/init.h>
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#include <linux/types.h>
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#define PSCI_POWER_STATE_TYPE_STANDBY 0
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#define PSCI_POWER_STATE_TYPE_POWER_DOWN 1
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bool psci_tos_resident_on(int cpu);
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bool psci_power_state_loses_context(u32 state);
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bool psci_power_state_is_valid(u32 state);
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struct psci_operations {
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int (*cpu_suspend)(u32 state, unsigned long entry_point);
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int (*cpu_off)(u32 state);
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int (*cpu_on)(unsigned long cpuid, unsigned long entry_point);
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int (*migrate)(unsigned long cpuid);
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int (*affinity_info)(unsigned long target_affinity,
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unsigned long lowest_affinity_level);
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int (*migrate_info_type)(void);
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};
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extern struct psci_operations psci_ops;
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#if defined(CONFIG_ARM_PSCI_FW)
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int __init psci_dt_init(void);
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#else
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static inline int psci_dt_init(void) { return 0; }
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#endif
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#if defined(CONFIG_ARM_PSCI_FW) && defined(CONFIG_ACPI)
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int __init psci_acpi_init(void);
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bool __init acpi_psci_present(void);
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bool __init acpi_psci_use_hvc(void);
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#else
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static inline int psci_acpi_init(void) { return 0; }
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static inline bool acpi_psci_present(void) { return false; }
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#endif
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#endif /* __LINUX_PSCI_H */
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