src/target/armv7a.h

   1 /***************************************************************************
   2  *    Copyright (C) 2009 by David Brownell                                 *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  18  ***************************************************************************/
  19 #ifndef ARMV7A_H
  20 #define ARMV7A_H
  21
  22 #include "register.h"
  23 #include "target.h"
  24 #include "log.h"
  25 #include "arm_adi_v5.h"
  26 #include "armv4_5.h"
  27 #include "armv4_5_mmu.h"
  28 #include "armv4_5_cache.h"
  29
  30 typedef enum armv7a_mode
  31 {
  32         ARMV7A_MODE_USR = 16,
  33         ARMV7A_MODE_FIQ = 17,
  34         ARMV7A_MODE_IRQ = 18,
  35         ARMV7A_MODE_SVC = 19,
  36         ARMV7A_MODE_ABT = 23,
  37         ARMV7A_MODE_UND = 27,
  38         ARMV7A_MODE_SYS = 31,
  39         ARMV7A_MODE_MON = 22,
  40         ARMV7A_MODE_ANY = -1
  41 } armv7a_t;
  42
  43 extern char **armv7a_mode_strings;
  44
  45 typedef enum armv7a_state
  46 {
  47         ARMV7A_STATE_ARM,
  48         ARMV7A_STATE_THUMB,
  49         ARMV7A_STATE_JAZELLE,
  50         ARMV7A_STATE_THUMBEE,
  51 } armv7a_state_t;
  52
  53 extern char *armv7a_state_strings[];
  54
  55 extern int armv7a_core_reg_map[8][17];
  56
  57 #define ARMV7A_CORE_REG_MODE(cache, mode, num) \
  58                 cache->reg_list[armv7a_core_reg_map[armv7a_mode_to_number(mode)][num]]
  59 #define ARMV7A_CORE_REG_MODENUM(cache, mode, num) \
  60                 cache->reg_list[armv7a_core_reg_map[mode][num]]
  61
  62 enum
  63 {
  64         ARM_PC  = 15,
  65         ARM_CPSR = 16
  66 }
  67 ;
  68 /* offsets into armv4_5 core register cache */
  69 enum
  70 {
  71         ARMV7A_CPSR = 31,
  72         ARMV7A_SPSR_FIQ = 32,
  73         ARMV7A_SPSR_IRQ = 33,
  74         ARMV7A_SPSR_SVC = 34,
  75         ARMV7A_SPSR_ABT = 35,
  76         ARMV7A_SPSR_UND = 36
  77 };
  78
  79 #define ARMV4_5_COMMON_MAGIC 0x0A450A45
  80 #define ARMV7_COMMON_MAGIC 0x0A450999
  81
  82 /* VA to PA translation operations opc2 values*/
  83 #define V2PCWPR  0
  84 #define V2PCWPW  1
  85 #define V2PCWUR  2
  86 #define V2PCWUW  3
  87 #define V2POWPR  4
  88 #define V2POWPW  5
  89 #define V2POWUR  6
  90 #define V2POWUW  7
  91
  92 struct armv7a_common
  93 {
  94         int common_magic;
  95         struct reg_cache *core_cache;
  96         enum armv7a_mode core_mode;
  97         enum armv7a_state core_state;
  98
  99         /* arm adp debug port */
 100         struct swjdp_common swjdp_info;
 101
 102         /* Core Debug Unit */
 103         uint32_t debug_base;
 104         uint8_t debug_ap;
 105         uint8_t memory_ap;
 106
 107         /* Cache and Memory Management Unit */
 108         struct armv4_5_mmu_common armv4_5_mmu;
 109         armv4_5_common_t armv4_5_common;
 110
 111 //      int (*full_context)(struct target_s *target);
 112 //      int (*read_core_reg)(struct target_s *target, int num, enum armv7a_mode mode);
 113 //      int (*write_core_reg)(struct target_s *target, int num, enum armv7a_mode mode, u32 value);
 114         int (*read_cp15)(struct target_s *target,
 115                         uint32_t op1, uint32_t op2,
 116                         uint32_t CRn, uint32_t CRm, uint32_t *value);
 117         int (*write_cp15)(struct target_s *target,
 118                         uint32_t op1, uint32_t op2,
 119                         uint32_t CRn, uint32_t CRm, uint32_t value);
 120
 121         int (*examine_debug_reason)(target_t *target);
 122         void (*post_debug_entry)(target_t *target);
 123
 124         void (*pre_restore_context)(target_t *target);
 125         void (*post_restore_context)(target_t *target);
 126
 127 };
 128
 129 static inline struct armv7a_common *
 130 target_to_armv7a(struct target_s *target)
 131 {
 132         return container_of(target->arch_info, struct armv7a_common,
 133                         armv4_5_common);
 134 }
 135
 136 struct armv7a_algorithm
 137 {
 138         int common_magic;
 139
 140         enum armv7a_mode core_mode;
 141         enum armv7a_state core_state;
 142 };
 143
 144 struct armv7a_core_reg
 145 {
 146         int num;
 147         enum armv7a_mode mode;
 148         target_t *target;
 149         struct armv7a_common *armv7a_common;
 150 };
 151
 152 int armv7a_arch_state(struct target_s *target);
 153 struct reg_cache *armv7a_build_reg_cache(target_t *target,
 154                 struct armv7a_common *armv7a_common);
 155 int armv7a_register_commands(struct command_context_s *cmd_ctx);
 156 int armv7a_init_arch_info(target_t *target, struct armv7a_common *armv7a);
 157
 158 /* map psr mode bits to linear number */
 159 static inline int armv7a_mode_to_number(enum armv7a_mode mode)
 160 {
 161         switch (mode)
 162         {
 163                 case ARMV7A_MODE_USR: return 0; break;
 164                 case ARMV7A_MODE_FIQ: return 1; break;
 165                 case ARMV7A_MODE_IRQ: return 2; break;
 166                 case ARMV7A_MODE_SVC: return 3; break;
 167                 case ARMV7A_MODE_ABT: return 4; break;
 168                 case ARMV7A_MODE_UND: return 5; break;
 169                 case ARMV7A_MODE_SYS: return 6; break;
 170                 case ARMV7A_MODE_MON: return 7; break;
 171                 case ARMV7A_MODE_ANY: return 0; break;  /* map MODE_ANY to user mode */
 172                 default:
 173                         LOG_ERROR("invalid mode value encountered, val %d", mode);
 174                         return -1;
 175         }
 176 }
 177
 178 /* map linear number to mode bits */
 179 static inline enum armv7a_mode armv7a_number_to_mode(int number)
 180 {
 181         switch(number)
 182         {
 183                 case 0: return ARMV7A_MODE_USR; break;
 184                 case 1: return ARMV7A_MODE_FIQ; break;
 185                 case 2: return ARMV7A_MODE_IRQ; break;
 186                 case 3: return ARMV7A_MODE_SVC; break;
 187                 case 4: return ARMV7A_MODE_ABT; break;
 188                 case 5: return ARMV7A_MODE_UND; break;
 189                 case 6: return ARMV7A_MODE_SYS; break;
 190                 case 7: return ARMV7A_MODE_MON; break;
 191                 default:
 192                         LOG_ERROR("mode index out of bounds");
 193                         return ARMV7A_MODE_ANY;
 194         }
 195 };
 196
 197
 198 #endif /* ARMV4_5_H */