linux-headers/linux/psci.h

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