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);
  24
  25int psci_cpu_init_idle(unsigned int cpu);
  26int psci_cpu_suspend_enter(unsigned long index);
  27
  28enum psci_conduit {
  29        PSCI_CONDUIT_NONE,
  30        PSCI_CONDUIT_SMC,
  31        PSCI_CONDUIT_HVC,
  32};
  33
  34enum smccc_version {
  35        SMCCC_VERSION_1_0,
  36        SMCCC_VERSION_1_1,
  37};
  38
  39struct psci_operations {
  40        u32 (*get_version)(void);
  41        int (*cpu_suspend)(u32 state, unsigned long entry_point);
  42        int (*cpu_off)(u32 state);
  43        int (*cpu_on)(unsigned long cpuid, unsigned long entry_point);
  44        int (*migrate)(unsigned long cpuid);
  45        int (*affinity_info)(unsigned long target_affinity,
  46                        unsigned long lowest_affinity_level);
  47        int (*migrate_info_type)(void);
  48        enum psci_conduit conduit;
  49        enum smccc_version smccc_version;
  50};
  51
  52extern struct psci_operations psci_ops;
  53
  54#if defined(CONFIG_ARM_PSCI_FW)
  55int __init psci_dt_init(void);
  56#else
  57static inline int psci_dt_init(void) { return 0; }
  58#endif
  59
  60#if defined(CONFIG_ARM_PSCI_FW) && defined(CONFIG_ACPI)
  61int __init psci_acpi_init(void);
  62bool __init acpi_psci_present(void);
  63bool acpi_psci_use_hvc(void);
  64#else
  65static inline int psci_acpi_init(void) { return 0; }
  66static inline bool acpi_psci_present(void) { return false; }
  67static inline bool acpi_psci_use_hvc(void) {return false; }
  68#endif
  69
  70#endif /* __LINUX_PSCI_H */
  71