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/init.h> 11 #include <linux/types.h> 12 13 #define PSCI_POWER_STATE_TYPE_STANDBY 0 14 #define PSCI_POWER_STATE_TYPE_POWER_DOWN 1 15 16 bool psci_tos_resident_on(int cpu); 17 18 int psci_cpu_init_idle(unsigned int cpu); 19 int psci_cpu_suspend_enter(unsigned long index); 20 21 enum psci_conduit { 22 PSCI_CONDUIT_NONE, 23 PSCI_CONDUIT_SMC, 24 PSCI_CONDUIT_HVC, 25 }; 26 27 enum smccc_version { 28 SMCCC_VERSION_1_0, 29 SMCCC_VERSION_1_1, 30 }; 31 32 struct psci_operations { 33 u32 (*get_version)(void); 34 int (*cpu_suspend)(u32 state, unsigned long entry_point); 35 int (*cpu_off)(u32 state); 36 int (*cpu_on)(unsigned long cpuid, unsigned long entry_point); 37 int (*migrate)(unsigned long cpuid); 38 int (*affinity_info)(unsigned long target_affinity, 39 unsigned long lowest_affinity_level); 40 int (*migrate_info_type)(void); 41 enum psci_conduit conduit; 42 enum smccc_version smccc_version; 43 }; 44 45 extern struct psci_operations psci_ops; 46 47 #if defined(CONFIG_ARM_PSCI_FW) 48 int __init psci_dt_init(void); 49 #else 50 static inline int psci_dt_init(void) { return 0; } 51 #endif 52 53 #if defined(CONFIG_ARM_PSCI_FW) && defined(CONFIG_ACPI) 54 int __init psci_acpi_init(void); 55 bool __init acpi_psci_present(void); 56 bool acpi_psci_use_hvc(void); 57 #else 58 static inline int psci_acpi_init(void) { return 0; } 59 static inline bool acpi_psci_present(void) { return false; } 60 static inline bool acpi_psci_use_hvc(void) {return false; } 61 #endif 62 63 #endif /* __LINUX_PSCI_H */ 64