LXR linux/include/linux/psci.h

   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
  23bool psci_tos_resident_on(int cpu);
  24bool psci_power_state_loses_context(u32 state);
  25bool psci_power_state_is_valid(u32 state);
  26
  27int psci_cpu_init_idle(unsigned int cpu);
  28int psci_cpu_suspend_enter(unsigned long index);
  29
  30struct 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
  40extern struct psci_operations psci_ops;
  41
  42#if defined(CONFIG_ARM_PSCI_FW)
  43int __init psci_dt_init(void);
  44#else
  45static inline int psci_dt_init(void) { return 0; }
  46#endif
  47
  48#if defined(CONFIG_ARM_PSCI_FW) && defined(CONFIG_ACPI)
  49int __init psci_acpi_init(void);
  50bool __init acpi_psci_present(void);
  51bool __init acpi_psci_use_hvc(void);
  52#else
  53static inline int psci_acpi_init(void) { return 0; }
  54static inline bool acpi_psci_present(void) { return false; }
  55#endif
  56
  57#endif /* __LINUX_PSCI_H */
  58