include/linux/psci.h

   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 int psci_set_osi_mode(void);
  22 bool psci_has_osi_support(void);
  23
  24 enum smccc_version {
  25         SMCCC_VERSION_1_0,
  26         SMCCC_VERSION_1_1,
  27 };
  28
  29 struct psci_operations {
  30         u32 (*get_version)(void);
  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         enum arm_smccc_conduit conduit;
  39         enum smccc_version smccc_version;
  40 };
  41
  42 extern struct psci_operations psci_ops;
  43
  44 #if defined(CONFIG_ARM_PSCI_FW)
  45 int __init psci_dt_init(void);
  46 #else
  47 static inline int psci_dt_init(void) { return 0; }
  48 #endif
  49
  50 #if defined(CONFIG_ARM_PSCI_FW) && defined(CONFIG_ACPI)
  51 int __init psci_acpi_init(void);
  52 bool __init acpi_psci_present(void);
  53 bool acpi_psci_use_hvc(void);
  54 #else
  55 static inline int psci_acpi_init(void) { return 0; }
  56 static inline bool acpi_psci_present(void) { return false; }
  57 static inline bool acpi_psci_use_hvc(void) {return false; }
  58 #endif
  59
  60 #endif /* __LINUX_PSCI_H */