1 /* 2 * This program is free software; you can redistribute it and/or modify 3 * it under the terms of the GNU General Public License version 2 as 4 * published by the Free Software Foundation. 5 * 6 * This program is distributed in the hope that it will be useful, 7 * but WITHOUT ANY WARRANTY; without even the implied warranty of 8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 9 * GNU General Public License for more details. 10 * 11 * Copyright (C) 2015 ARM Limited 12 */ 13 14 #ifndef __LINUX_PSCI_H 15 #define __LINUX_PSCI_H 16 17 #include <linux/init.h> 18 #include <linux/types.h> 19 20 #define PSCI_POWER_STATE_TYPE_STANDBY 0 21 #define PSCI_POWER_STATE_TYPE_POWER_DOWN 1 22 23 bool psci_tos_resident_on(int cpu); 24 bool psci_power_state_loses_context(u32 state); 25 bool psci_power_state_is_valid(u32 state); 26 27 int psci_cpu_init_idle(unsigned int cpu); 28 int psci_cpu_suspend_enter(unsigned long index); 29 30 struct psci_operations { 31 int (*cpu_suspend)(u32 state, unsigned long entry_point); 32 int (*cpu_off)(u32 state); 33 int (*cpu_on)(unsigned long cpuid, unsigned long entry_point); 34 int (*migrate)(unsigned long cpuid); 35 int (*affinity_info)(unsigned long target_affinity, 36 unsigned long lowest_affinity_level); 37 int (*migrate_info_type)(void); 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 __init 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 #endif 56 57 #endif /* __LINUX_PSCI_H */ 58