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(bool enable);
  22 bool psci_has_osi_support(void);
  23
  24 struct psci_operations {
  25         u32 (*get_version)(void);
  26         int (*cpu_suspend)(u32 state, unsigned long entry_point);
  27         int (*cpu_off)(u32 state);
  28         int (*cpu_on)(unsigned long cpuid, unsigned long entry_point);
  29         int (*migrate)(unsigned long cpuid);
  30         int (*affinity_info)(unsigned long target_affinity,
  31                         unsigned long lowest_affinity_level);
  32         int (*migrate_info_type)(void);
  33 };
  34
  35 extern struct psci_operations psci_ops;
  36
  37 struct psci_0_1_function_ids {
  38         u32 cpu_suspend;
  39         u32 cpu_on;
  40         u32 cpu_off;
  41         u32 migrate;
  42 };
  43
  44 struct psci_0_1_function_ids get_psci_0_1_function_ids(void);
  45
  46 #if defined(CONFIG_ARM_PSCI_FW)
  47 int __init psci_dt_init(void);
  48 #else
  49 static inline int psci_dt_init(void) { return 0; }
  50 #endif
  51
  52 #if defined(CONFIG_ARM_PSCI_FW) && defined(CONFIG_ACPI)
  53 int __init psci_acpi_init(void);
  54 bool __init acpi_psci_present(void);
  55 bool acpi_psci_use_hvc(void);
  56 #else
  57 static inline int psci_acpi_init(void) { return 0; }
  58 static inline bool acpi_psci_present(void) { return false; }
  59 static inline bool acpi_psci_use_hvc(void) {return false; }
  60 #endif
  61
  62 #endif /* __LINUX_PSCI_H */