1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * 4 * Copyright (C) 2015 ARM Limited 5 */ 6 7 #ifndef __LINUX_PSCI_H 8 #define __LINUX_PSCI_H 9 10 #include <linux/arm-smccc.h> 11 #include <linux/init.h> 12 #include <linux/types.h> 13 14 #define PSCI_POWER_STATE_TYPE_STANDBY 0 15 #define PSCI_POWER_STATE_TYPE_POWER_DOWN 1 16 17 bool psci_tos_resident_on(int cpu); 18 19 int psci_cpu_suspend_enter(u32 state); 20 bool psci_power_state_is_valid(u32 state); 21 22 enum smccc_version { 23 SMCCC_VERSION_1_0, 24 SMCCC_VERSION_1_1, 25 }; 26 27 struct psci_operations { 28 u32 (*get_version)(void); 29 int (*cpu_suspend)(u32 state, unsigned long entry_point); 30 int (*cpu_off)(u32 state); 31 int (*cpu_on)(unsigned long cpuid, unsigned long entry_point); 32 int (*migrate)(unsigned long cpuid); 33 int (*affinity_info)(unsigned long target_affinity, 34 unsigned long lowest_affinity_level); 35 int (*migrate_info_type)(void); 36 enum arm_smccc_conduit conduit; 37 enum smccc_version smccc_version; 38 }; 39 40 extern struct psci_operations psci_ops; 41 42 #if defined(CONFIG_ARM_PSCI_FW) 43 int __init psci_dt_init(void); 44 #else 45 static inline int psci_dt_init(void) { return 0; } 46 #endif 47 48 #if defined(CONFIG_ARM_PSCI_FW) && defined(CONFIG_ACPI) 49 int __init psci_acpi_init(void); 50 bool __init acpi_psci_present(void); 51 bool acpi_psci_use_hvc(void); 52 #else 53 static inline int psci_acpi_init(void) { return 0; } 54 static inline bool acpi_psci_present(void) { return false; } 55 static inline bool acpi_psci_use_hvc(void) {return false; } 56 #endif 57 58 #endif /* __LINUX_PSCI_H */ 59