LXR linux/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
  17bool psci_tos_resident_on(int cpu);
  18
  19int psci_cpu_suspend_enter(u32 state);
  20bool psci_power_state_is_valid(u32 state);
  21int psci_set_osi_mode(bool enable);
  22bool psci_has_osi_support(void);
  23
  24struct 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
  35extern struct psci_operations psci_ops;
  36
  37struct psci_0_1_function_ids {
  38        u32 cpu_suspend;
  39        u32 cpu_on;
  40        u32 cpu_off;
  41        u32 migrate;
  42};
  43
  44struct psci_0_1_function_ids get_psci_0_1_function_ids(void);
  45
  46#if defined(CONFIG_ARM_PSCI_FW)
  47int __init psci_dt_init(void);
  48#else
  49static inline int psci_dt_init(void) { return 0; }
  50#endif
  51
  52#if defined(CONFIG_ARM_PSCI_FW) && defined(CONFIG_ACPI)
  53int __init psci_acpi_init(void);
  54bool __init acpi_psci_present(void);
  55bool acpi_psci_use_hvc(void);
  56#else
  57static inline int psci_acpi_init(void) { return 0; }
  58static inline bool acpi_psci_present(void) { return false; }
  59static inline bool acpi_psci_use_hvc(void) {return false; }
  60#endif
  61
  62#endif /* __LINUX_PSCI_H */
  63