include/atf_common.h

   1 /* SPDX-License-Identifier: BSD-3-Clause */
   2 /*
   3  * This is from the ARM TF Project,
   4  * Repository: https://github.com/TrustedFirmware-A/trusted-firmware-a.git
   5  * File: include/common/bl_common.h
   6  * Portions copyright (c) 2013-2016, ARM Limited and Contributors. All rights
   7  * reserved.
   8  * Copyright (C) 2016-2017 Rockchip Electronic Co.,Ltd
   9  */
  10
  11 #ifndef __BL_COMMON_H__
  12 #define __BL_COMMON_H__
  13
  14 #define ATF_PARAM_EP            0x01
  15 #define ATF_PARAM_IMAGE_BINARY  0x02
  16 #define ATF_PARAM_BL31          0x03
  17 #define ATF_PARAM_BL_PARAMS     0x05
  18
  19 #define ATF_VERSION_1   0x01
  20 #define ATF_VERSION_2   0x02
  21
  22 #define ATF_BL31_IMAGE_ID       0x03
  23 #define ATF_BL32_IMAGE_ID       0x04
  24 #define ATF_BL33_IMAGE_ID       0x05
  25
  26 #define ATF_EP_SECURE   0x0
  27 #define ATF_EP_NON_SECURE       0x1
  28
  29 #define SET_PARAM_HEAD(_p, _type, _ver, _attr) do { \
  30         (_p)->h.type = (uint8_t)(_type); \
  31         (_p)->h.version = (uint8_t)(_ver); \
  32         (_p)->h.size = (uint16_t)sizeof(*_p); \
  33         (_p)->h.attr = (uint32_t)(_attr) ; \
  34         } while (0)
  35
  36 #define MODE_RW_SHIFT   0x4
  37 #define MODE_RW_MASK    0x1
  38 #define MODE_RW_64      0x0
  39 #define MODE_RW_32      0x1
  40
  41 #define MODE_EL_SHIFT   0x2
  42 #define MODE_EL_MASK    0x3
  43 #define MODE_EL3        0x3
  44 #define MODE_EL2        0x2
  45 #define MODE_EL1        0x1
  46 #define MODE_EL0        0x0
  47
  48 #define MODE_SP_SHIFT   0x0
  49 #define MODE_SP_MASK    0x1
  50 #define MODE_SP_EL0     0x0
  51 #define MODE_SP_ELX     0x1
  52
  53 #define SPSR_DAIF_SHIFT 6
  54 #define SPSR_DAIF_MASK  0x0f
  55
  56 #define SPSR_64(el, sp, daif)           \
  57         (MODE_RW_64 << MODE_RW_SHIFT |  \
  58          ((el) & MODE_EL_MASK) << MODE_EL_SHIFT |       \
  59          ((sp) & MODE_SP_MASK) << MODE_SP_SHIFT |       \
  60          ((daif) & SPSR_DAIF_MASK) << SPSR_DAIF_SHIFT)
  61
  62 #define SPSR_FIQ             (1 << 6)
  63 #define SPSR_IRQ             (1 << 7)
  64 #define SPSR_SERROR          (1 << 8)
  65 #define SPSR_DEBUG           (1 << 9)
  66 #define SPSR_EXCEPTION_MASK  (SPSR_FIQ | SPSR_IRQ | SPSR_SERROR | SPSR_DEBUG)
  67
  68 #define DAIF_FIQ_BIT (1<<0)
  69 #define DAIF_IRQ_BIT (1<<1)
  70 #define DAIF_ABT_BIT (1<<2)
  71 #define DAIF_DBG_BIT (1<<3)
  72 #define DISABLE_ALL_EXECPTIONS  \
  73         (DAIF_FIQ_BIT | DAIF_IRQ_BIT | DAIF_ABT_BIT | DAIF_DBG_BIT)
  74
  75 #ifndef __ASSEMBLY__
  76
  77 #include <linux/types.h>
  78
  79 /*******************************************************************************
  80  * Structure used for telling the next BL how much of a particular type of
  81  * memory is available for its use and how much is already used.
  82  ******************************************************************************/
  83 struct aapcs64_params {
  84         unsigned long arg0;
  85         unsigned long arg1;
  86         unsigned long arg2;
  87         unsigned long arg3;
  88         unsigned long arg4;
  89         unsigned long arg5;
  90         unsigned long arg6;
  91         unsigned long arg7;
  92 };
  93
  94 /***************************************************************************
  95  * This structure provides version information and the size of the
  96  * structure, attributes for the structure it represents
  97  ***************************************************************************/
  98 struct param_header {
  99         uint8_t type;           /* type of the structure */
 100         uint8_t version;    /* version of this structure */
 101         uint16_t size;      /* size of this structure in bytes */
 102         uint32_t attr;      /* attributes: unused bits SBZ */
 103 };
 104
 105 /*****************************************************************************
 106  * This structure represents the superset of information needed while
 107  * switching exception levels. The only two mechanisms to do so are
 108  * ERET & SMC. Security state is indicated using bit zero of header
 109  * attribute
 110  * NOTE: BL1 expects entrypoint followed by spsr at an offset from the start
 111  * of this structure defined by the macro `ENTRY_POINT_INFO_PC_OFFSET` while
 112  * processing SMC to jump to BL31.
 113  *****************************************************************************/
 114 struct entry_point_info {
 115         struct param_header h;
 116         uintptr_t pc;
 117         uint32_t spsr;
 118         struct aapcs64_params args;
 119 };
 120
 121 /*****************************************************************************
 122  * Image info binary provides information from the image loader that
 123  * can be used by the firmware to manage available trusted RAM.
 124  * More advanced firmware image formats can provide additional
 125  * information that enables optimization or greater flexibility in the
 126  * common firmware code
 127  *****************************************************************************/
 128 struct atf_image_info {
 129         struct param_header h;
 130         uintptr_t image_base;   /* physical address of base of image */
 131         uint32_t image_size;    /* bytes read from image file */
 132 #if CONFIG_IS_ENABLED(ATF_LOAD_IMAGE_V2)
 133         uint32_t image_max_size;
 134 #endif
 135 };
 136
 137 /*****************************************************************************
 138  * The image descriptor struct definition.
 139  *****************************************************************************/
 140 struct image_desc {
 141         /* Contains unique image id for the image. */
 142         unsigned int image_id;
 143         /*
 144          * This member contains Image state information.
 145          * Refer IMAGE_STATE_XXX defined above.
 146          */
 147         unsigned int state;
 148         uint32_t copied_size;   /* image size copied in blocks */
 149         struct atf_image_info atf_image_info;
 150         struct entry_point_info ep_info;
 151 };
 152
 153 /*******************************************************************************
 154  * This structure represents the superset of information that can be passed to
 155  * BL31 e.g. while passing control to it from BL2. The BL32 parameters will be
 156  * populated only if BL2 detects its presence. A pointer to a structure of this
 157  * type should be passed in X0 to BL31's cold boot entrypoint.
 158  *
 159  * Use of this structure and the X0 parameter is not mandatory: the BL31
 160  * platform code can use other mechanisms to provide the necessary information
 161  * about BL32 and BL33 to the common and SPD code.
 162  *
 163  * BL31 image information is mandatory if this structure is used. If either of
 164  * the optional BL32 and BL33 image information is not provided, this is
 165  * indicated by the respective image_info pointers being zero.
 166  ******************************************************************************/
 167 struct bl31_params {
 168         struct param_header h;
 169         struct atf_image_info *bl31_image_info;
 170         struct entry_point_info *bl32_ep_info;
 171         struct atf_image_info *bl32_image_info;
 172         struct entry_point_info *bl33_ep_info;
 173         struct atf_image_info *bl33_image_info;
 174 };
 175
 176 /* BL image node in the BL image execution sequence */
 177 struct bl_params_node {
 178         unsigned int image_id;
 179         struct atf_image_info *image_info;
 180         struct entry_point_info *ep_info;
 181         struct bl_params_node *next_params_info;
 182 };
 183
 184 /*
 185  * BL image head node in the BL image execution sequence
 186  * It is also used to pass information to next BL image.
 187  */
 188 struct bl_params {
 189         struct param_header h;
 190         struct bl_params_node *head;
 191 };
 192
 193 #define for_each_bl_params_node(bl_params, node) \
 194         for ((node) = (bl_params)->head; \
 195              (node); \
 196              (node) = (node)->next_params_info)
 197
 198 #endif /*__ASSEMBLY__ */
 199
 200 #endif /* __BL_COMMON_H__ */