linux-headers/linux/psci.h

   1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2 /*
   3  * ARM Power State and Coordination Interface (PSCI) header
   4  *
   5  * This header holds common PSCI defines and macros shared
   6  * by: ARM kernel, ARM64 kernel, KVM ARM/ARM64 and user space.
   7  *
   8  * Copyright (C) 2014 Linaro Ltd.
   9  * Author: Anup Patel <anup.patel@linaro.org>
  10  */
  11
  12 #ifndef _LINUX_PSCI_H
  13 #define _LINUX_PSCI_H
  14
  15 /*
  16  * PSCI v0.1 interface
  17  *
  18  * The PSCI v0.1 function numbers are implementation defined.
  19  *
  20  * Only PSCI return values such as: SUCCESS, NOT_SUPPORTED,
  21  * INVALID_PARAMS, and DENIED defined below are applicable
  22  * to PSCI v0.1.
  23  */
  24
  25 /* PSCI v0.2 interface */
  26 #define PSCI_0_2_FN_BASE                        0x84000000
  27 #define PSCI_0_2_FN(n)                          (PSCI_0_2_FN_BASE + (n))
  28 #define PSCI_0_2_64BIT                          0x40000000
  29 #define PSCI_0_2_FN64_BASE                      \
  30                                         (PSCI_0_2_FN_BASE + PSCI_0_2_64BIT)
  31 #define PSCI_0_2_FN64(n)                        (PSCI_0_2_FN64_BASE + (n))
  32
  33 #define PSCI_0_2_FN_PSCI_VERSION                PSCI_0_2_FN(0)
  34 #define PSCI_0_2_FN_CPU_SUSPEND                 PSCI_0_2_FN(1)
  35 #define PSCI_0_2_FN_CPU_OFF                     PSCI_0_2_FN(2)
  36 #define PSCI_0_2_FN_CPU_ON                      PSCI_0_2_FN(3)
  37 #define PSCI_0_2_FN_AFFINITY_INFO               PSCI_0_2_FN(4)
  38 #define PSCI_0_2_FN_MIGRATE                     PSCI_0_2_FN(5)
  39 #define PSCI_0_2_FN_MIGRATE_INFO_TYPE           PSCI_0_2_FN(6)
  40 #define PSCI_0_2_FN_MIGRATE_INFO_UP_CPU         PSCI_0_2_FN(7)
  41 #define PSCI_0_2_FN_SYSTEM_OFF                  PSCI_0_2_FN(8)
  42 #define PSCI_0_2_FN_SYSTEM_RESET                PSCI_0_2_FN(9)
  43
  44 #define PSCI_0_2_FN64_CPU_SUSPEND               PSCI_0_2_FN64(1)
  45 #define PSCI_0_2_FN64_CPU_ON                    PSCI_0_2_FN64(3)
  46 #define PSCI_0_2_FN64_AFFINITY_INFO             PSCI_0_2_FN64(4)
  47 #define PSCI_0_2_FN64_MIGRATE                   PSCI_0_2_FN64(5)
  48 #define PSCI_0_2_FN64_MIGRATE_INFO_UP_CPU       PSCI_0_2_FN64(7)
  49
  50 #define PSCI_1_0_FN_PSCI_FEATURES               PSCI_0_2_FN(10)
  51 #define PSCI_1_0_FN_SYSTEM_SUSPEND              PSCI_0_2_FN(14)
  52
  53 #define PSCI_1_0_FN64_SYSTEM_SUSPEND            PSCI_0_2_FN64(14)
  54
  55 /* PSCI v0.2 power state encoding for CPU_SUSPEND function */
  56 #define PSCI_0_2_POWER_STATE_ID_MASK            0xffff
  57 #define PSCI_0_2_POWER_STATE_ID_SHIFT           0
  58 #define PSCI_0_2_POWER_STATE_TYPE_SHIFT         16
  59 #define PSCI_0_2_POWER_STATE_TYPE_MASK          \
  60                                 (0x1 << PSCI_0_2_POWER_STATE_TYPE_SHIFT)
  61 #define PSCI_0_2_POWER_STATE_AFFL_SHIFT         24
  62 #define PSCI_0_2_POWER_STATE_AFFL_MASK          \
  63                                 (0x3 << PSCI_0_2_POWER_STATE_AFFL_SHIFT)
  64
  65 /* PSCI extended power state encoding for CPU_SUSPEND function */
  66 #define PSCI_1_0_EXT_POWER_STATE_ID_MASK        0xfffffff
  67 #define PSCI_1_0_EXT_POWER_STATE_ID_SHIFT       0
  68 #define PSCI_1_0_EXT_POWER_STATE_TYPE_SHIFT     30
  69 #define PSCI_1_0_EXT_POWER_STATE_TYPE_MASK      \
  70                                 (0x1 << PSCI_1_0_EXT_POWER_STATE_TYPE_SHIFT)
  71
  72 /* PSCI v0.2 affinity level state returned by AFFINITY_INFO */
  73 #define PSCI_0_2_AFFINITY_LEVEL_ON              0
  74 #define PSCI_0_2_AFFINITY_LEVEL_OFF             1
  75 #define PSCI_0_2_AFFINITY_LEVEL_ON_PENDING      2
  76
  77 /* PSCI v0.2 multicore support in Trusted OS returned by MIGRATE_INFO_TYPE */
  78 #define PSCI_0_2_TOS_UP_MIGRATE                 0
  79 #define PSCI_0_2_TOS_UP_NO_MIGRATE              1
  80 #define PSCI_0_2_TOS_MP                         2
  81
  82 /* PSCI version decoding (independent of PSCI version) */
  83 #define PSCI_VERSION_MAJOR_SHIFT                16
  84 #define PSCI_VERSION_MINOR_MASK                 \
  85                 ((1U << PSCI_VERSION_MAJOR_SHIFT) - 1)
  86 #define PSCI_VERSION_MAJOR_MASK                 ~PSCI_VERSION_MINOR_MASK
  87 #define PSCI_VERSION_MAJOR(ver)                 \
  88                 (((ver) & PSCI_VERSION_MAJOR_MASK) >> PSCI_VERSION_MAJOR_SHIFT)
  89 #define PSCI_VERSION_MINOR(ver)                 \
  90                 ((ver) & PSCI_VERSION_MINOR_MASK)
  91 #define PSCI_VERSION(maj, min)                                          \
  92         ((((maj) << PSCI_VERSION_MAJOR_SHIFT) & PSCI_VERSION_MAJOR_MASK) | \
  93          ((min) & PSCI_VERSION_MINOR_MASK))
  94
  95 /* PSCI features decoding (>=1.0) */
  96 #define PSCI_1_0_FEATURES_CPU_SUSPEND_PF_SHIFT  1
  97 #define PSCI_1_0_FEATURES_CPU_SUSPEND_PF_MASK   \
  98                         (0x1 << PSCI_1_0_FEATURES_CPU_SUSPEND_PF_SHIFT)
  99
 100 /* PSCI return values (inclusive of all PSCI versions) */
 101 #define PSCI_RET_SUCCESS                        0
 102 #define PSCI_RET_NOT_SUPPORTED                  -1
 103 #define PSCI_RET_INVALID_PARAMS                 -2
 104 #define PSCI_RET_DENIED                         -3
 105 #define PSCI_RET_ALREADY_ON                     -4
 106 #define PSCI_RET_ON_PENDING                     -5
 107 #define PSCI_RET_INTERNAL_FAILURE               -6
 108 #define PSCI_RET_NOT_PRESENT                    -7
 109 #define PSCI_RET_DISABLED                       -8
 110 #define PSCI_RET_INVALID_ADDRESS                -9
 111
 112 #endif /* _LINUX_PSCI_H */