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 enum psci_conduit { 28 PSCI_CONDUIT_NONE, 29 PSCI_CONDUIT_SMC, 30 PSCI_CONDUIT_HVC, 31 }; 32 33 enum smccc_version { 34 SMCCC_VERSION_1_0, 35 SMCCC_VERSION_1_1, 36 }; 37 38 struct psci_operations { 39 int (*cpu_suspend)(u32 state, unsigned long entry_point); 40 int (*cpu_off)(u32 state); 41 int (*cpu_on)(unsigned long cpuid, unsigned long entry_point); 42 int (*migrate)(unsigned long cpuid); 43 int (*affinity_info)(unsigned long target_affinity, 44 unsigned long lowest_affinity_level); 45 int (*migrate_info_type)(void); 46 enum psci_conduit conduit; 47 enum smccc_version smccc_version; 48 }; 49 50 extern struct psci_operations psci_ops; 51 52 #if defined(CONFIG_ARM_PSCI_FW) 53 int __init psci_dt_init(void); 54 #else psci_dt_init(void)55static inline int psci_dt_init(void) { return 0; } 56 #endif 57 58 #if defined(CONFIG_ARM_PSCI_FW) && defined(CONFIG_ACPI) 59 int __init psci_acpi_init(void); 60 bool __init acpi_psci_present(void); 61 bool __init acpi_psci_use_hvc(void); 62 #else psci_acpi_init(void)63static inline int psci_acpi_init(void) { return 0; } acpi_psci_present(void)64static inline bool acpi_psci_present(void) { return false; } 65 #endif 66 67 #endif /* __LINUX_PSCI_H */ 68