src/target/armv7a.c

   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 #ifdef HAVE_CONFIG_H
  20 #include "config.h"
  21 #endif
  22
  23 #include "replacements.h"
  24
  25 #include "armv7a.h"
  26
  27 #include "target.h"
  28 #include "register.h"
  29 #include "log.h"
  30 #include "binarybuffer.h"
  31 #include "command.h"
  32
  33 #include <stdlib.h>
  34 #include <string.h>
  35 #include <unistd.h>
  36
  37 bitfield_desc_t armv7a_psr_bitfield_desc[] =
  38 {
  39         {"M[4:0]", 5},
  40         {"T", 1},
  41         {"F", 1},
  42         {"I", 1},
  43         {"A", 1},
  44         {"E", 1},
  45         {"IT[7:2]", 6},
  46         {"GE[3:0]", 4},
  47         {"reserved(DNM)", 4},
  48         {"J", 1},
  49         {"IT[0:1]", 2},
  50         {"Q", 1},
  51         {"V", 1},
  52         {"C", 1},
  53         {"Z", 1},
  54         {"N", 1},
  55 };
  56
  57 char* armv7a_core_reg_list[] =
  58 {
  59         "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
  60         "r8", "r9", "r10", "r11", "r12", "r13_usr", "lr_usr", "pc",
  61         "r8_fiq", "r9_fiq", "r10_fiq", "r11_fiq", "r12_fiq", "r13_fiq", "lr_fiq",
  62         "r13_irq", "lr_irq",
  63         "r13_svc", "lr_svc",
  64         "r13_abt", "lr_abt",
  65         "r13_und", "lr_und",
  66         "cpsr", "spsr_fiq", "spsr_irq", "spsr_svc", "spsr_abt", "spsr_und",
  67         "r13_mon", "lr_mon", "spsr_mon"
  68 };
  69
  70 char * armv7a_mode_strings_list[] =
  71 {
  72         "Illegal mode value", "System and User", "FIQ", "IRQ",
  73         "Supervisor", "Abort", "Undefined", "Monitor"
  74 };
  75
  76 /* Hack! Yuk! allow -1 index, which simplifies codepaths elsewhere in the code */
  77 char** armv7a_mode_strings = armv7a_mode_strings_list+1;
  78
  79 char* armv7a_state_strings[] =
  80 {
  81         "ARM", "Thumb", "Jazelle", "ThumbEE"
  82 };
  83
  84 armv7a_core_reg_t armv7a_core_reg_list_arch_info[] =
  85 {
  86         {0, ARMV4_5_MODE_ANY, NULL, NULL},
  87         {1, ARMV4_5_MODE_ANY, NULL, NULL},
  88         {2, ARMV4_5_MODE_ANY, NULL, NULL},
  89         {3, ARMV4_5_MODE_ANY, NULL, NULL},
  90         {4, ARMV4_5_MODE_ANY, NULL, NULL},
  91         {5, ARMV4_5_MODE_ANY, NULL, NULL},
  92         {6, ARMV4_5_MODE_ANY, NULL, NULL},
  93         {7, ARMV4_5_MODE_ANY, NULL, NULL},
  94         {8, ARMV4_5_MODE_ANY, NULL, NULL},
  95         {9, ARMV4_5_MODE_ANY, NULL, NULL},
  96         {10, ARMV4_5_MODE_ANY, NULL, NULL},
  97         {11, ARMV4_5_MODE_ANY, NULL, NULL},
  98         {12, ARMV4_5_MODE_ANY, NULL, NULL},
  99         {13, ARMV4_5_MODE_USR, NULL, NULL},
 100         {14, ARMV4_5_MODE_USR, NULL, NULL},
 101         {15, ARMV4_5_MODE_ANY, NULL, NULL},
 102
 103         {8, ARMV4_5_MODE_FIQ, NULL, NULL},
 104         {9, ARMV4_5_MODE_FIQ, NULL, NULL},
 105         {10, ARMV4_5_MODE_FIQ, NULL, NULL},
 106         {11, ARMV4_5_MODE_FIQ, NULL, NULL},
 107         {12, ARMV4_5_MODE_FIQ, NULL, NULL},
 108         {13, ARMV4_5_MODE_FIQ, NULL, NULL},
 109         {14, ARMV4_5_MODE_FIQ, NULL, NULL},
 110
 111         {13, ARMV4_5_MODE_IRQ, NULL, NULL},
 112         {14, ARMV4_5_MODE_IRQ, NULL, NULL},
 113
 114         {13, ARMV4_5_MODE_SVC, NULL, NULL},
 115         {14, ARMV4_5_MODE_SVC, NULL, NULL},
 116
 117         {13, ARMV4_5_MODE_ABT, NULL, NULL},
 118         {14, ARMV4_5_MODE_ABT, NULL, NULL},
 119
 120         {13, ARMV4_5_MODE_UND, NULL, NULL},
 121         {14, ARMV4_5_MODE_UND, NULL, NULL},
 122
 123         {16, ARMV4_5_MODE_ANY, NULL, NULL},
 124         {16, ARMV4_5_MODE_FIQ, NULL, NULL},
 125         {16, ARMV4_5_MODE_IRQ, NULL, NULL},
 126         {16, ARMV4_5_MODE_SVC, NULL, NULL},
 127         {16, ARMV4_5_MODE_ABT, NULL, NULL},
 128         {16, ARMV4_5_MODE_UND, NULL, NULL},
 129
 130         {13, ARMV7A_MODE_MON, NULL, NULL},
 131         {14, ARMV7A_MODE_MON, NULL, NULL},
 132         {16, ARMV7A_MODE_MON, NULL, NULL}
 133 };
 134
 135 /* map core mode (USR, FIQ, ...) and register number to indizes into the register cache */
 136 int armv7a_core_reg_map[8][17] =
 137 {
 138         {       /* USR */
 139                 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 31
 140         },
 141         {       /* FIQ */
 142                 0, 1, 2, 3, 4, 5, 6, 7, 16, 17, 18, 19, 20, 21, 22, 15, 32
 143         },
 144         {       /* IRQ */
 145                 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 23, 24, 15, 33
 146         },
 147         {       /* SVC */
 148                 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 25, 26, 15, 34
 149         },
 150         {       /* ABT */
 151                 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 27, 28, 15, 35
 152         },
 153         {       /* UND */
 154                 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 29, 30, 15, 36
 155         },
 156         {       /* SYS */
 157                 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 31
 158         },
 159         {       /* MON */
 160                 /* TODO Fix the register mapping for mon, we need r13_mon,
 161                  * r14_mon and spsr_mon
 162                  */
 163                 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 31
 164         }
 165 };
 166
 167 uint8_t armv7a_gdb_dummy_fp_value[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
 168
 169 reg_t armv7a_gdb_dummy_fp_reg =
 170 {
 171         "GDB dummy floating-point register", armv7a_gdb_dummy_fp_value,
 172                         0, 1, 96, NULL, 0, NULL, 0
 173 };
 174
 175 int armv7a_arch_state(struct target_s *target)
 176 {
 177         static const char *state[] =
 178         {
 179                 "disabled", "enabled"
 180         };
 181
 182         armv4_5_common_t *armv4_5 = target->arch_info;
 183         armv7a_common_t *armv7a = armv4_5->arch_info;
 184
 185         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 186         {
 187                 LOG_ERROR("BUG: called for a non-ARMv4/5 target");
 188                 exit(-1);
 189         }
 190
 191         LOG_USER("target halted in %s state due to %s, current mode: %s\n"
 192                          "%s: 0x%8.8x pc: 0x%8.8x\n"
 193                          "MMU: %s, D-Cache: %s, I-Cache: %s",
 194                  armv7a_state_strings[armv4_5->core_state],
 195                  Jim_Nvp_value2name_simple(nvp_target_debug_reason,
 196                                 target->debug_reason)->name,
 197                  armv7a_mode_strings[
 198                         armv7a_mode_to_number(armv4_5->core_mode)],
 199                  armv7a_core_reg_list[armv7a_core_reg_map[
 200                         armv7a_mode_to_number(armv4_5->core_mode)][16]],
 201                  buf_get_u32(ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
 202                                 armv4_5->core_mode, 16).value, 0, 32),
 203                  buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32),
 204                  state[armv7a->armv4_5_mmu.mmu_enabled],
 205                  state[armv7a->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled],
 206                  state[armv7a->armv4_5_mmu.armv4_5_cache.i_cache_enabled]);
 207
 208         return ERROR_OK;
 209 }
 210
 211
 212 static int handle_dap_baseaddr_command(struct command_context_s *cmd_ctx,
 213                 char *cmd, char **args, int argc)
 214 {
 215         target_t *target = get_current_target(cmd_ctx);
 216         armv4_5_common_t *armv4_5 = target->arch_info;
 217         armv7a_common_t *armv7a = armv4_5->arch_info;
 218         swjdp_common_t *swjdp = &armv7a->swjdp_info;
 219
 220         return dap_baseaddr_command(cmd_ctx, swjdp, args, argc);
 221 }
 222
 223 static int handle_dap_memaccess_command(struct command_context_s *cmd_ctx,
 224                 char *cmd, char **args, int argc)
 225 {
 226         target_t *target = get_current_target(cmd_ctx);
 227         armv4_5_common_t *armv4_5 = target->arch_info;
 228         armv7a_common_t *armv7a = armv4_5->arch_info;
 229         swjdp_common_t *swjdp = &armv7a->swjdp_info;
 230
 231         return dap_memaccess_command(cmd_ctx, swjdp, args, argc);
 232 }
 233
 234 static int handle_dap_apsel_command(struct command_context_s *cmd_ctx,
 235                 char *cmd, char **args, int argc)
 236 {
 237         target_t *target = get_current_target(cmd_ctx);
 238         armv4_5_common_t *armv4_5 = target->arch_info;
 239         armv7a_common_t *armv7a = armv4_5->arch_info;
 240         swjdp_common_t *swjdp = &armv7a->swjdp_info;
 241
 242         return dap_apsel_command(cmd_ctx, swjdp, args, argc);
 243 }
 244
 245 static int handle_dap_apid_command(struct command_context_s *cmd_ctx,
 246                 char *cmd, char **args, int argc)
 247 {
 248         target_t *target = get_current_target(cmd_ctx);
 249         armv4_5_common_t *armv4_5 = target->arch_info;
 250         armv7a_common_t *armv7a = armv4_5->arch_info;
 251         swjdp_common_t *swjdp = &armv7a->swjdp_info;
 252
 253         return dap_apid_command(cmd_ctx, swjdp, args, argc);
 254 }
 255
 256 static int handle_dap_info_command(struct command_context_s *cmd_ctx,
 257                 char *cmd, char **args, int argc)
 258 {
 259         target_t *target = get_current_target(cmd_ctx);
 260         armv4_5_common_t *armv4_5 = target->arch_info;
 261         armv7a_common_t *armv7a = armv4_5->arch_info;
 262         swjdp_common_t *swjdp = &armv7a->swjdp_info;
 263         uint32_t apsel;
 264
 265         apsel =  swjdp->apsel;
 266         if (argc > 0)
 267                 apsel = strtoul(args[0], NULL, 0);
 268
 269         return dap_info_command(cmd_ctx, swjdp, apsel);
 270 }
 271
 272 int armv7a_register_commands(struct command_context_s *cmd_ctx)
 273 {
 274         command_t *arm_adi_v5_dap_cmd;
 275
 276         arm_adi_v5_dap_cmd = register_command(cmd_ctx, NULL, "dap",
 277                         NULL, COMMAND_ANY,
 278                         "cortex dap specific commands");
 279
 280         register_command(cmd_ctx, arm_adi_v5_dap_cmd, "info",
 281                         handle_dap_info_command, COMMAND_EXEC,
 282                         "dap info for ap [num], "
 283                         "default currently selected AP");
 284         register_command(cmd_ctx, arm_adi_v5_dap_cmd, "apsel",
 285                         handle_dap_apsel_command, COMMAND_EXEC,
 286                         "select a different AP [num] (default 0)");
 287         register_command(cmd_ctx, arm_adi_v5_dap_cmd, "apid",
 288                         handle_dap_apid_command, COMMAND_EXEC,
 289                         "return id reg from AP [num], "
 290                         "default currently selected AP");
 291         register_command(cmd_ctx, arm_adi_v5_dap_cmd, "baseaddr",
 292                         handle_dap_baseaddr_command, COMMAND_EXEC,
 293                         "return debug base address from AP [num], "
 294                         "default currently selected AP");
 295         register_command(cmd_ctx, arm_adi_v5_dap_cmd, "memaccess",
 296                         handle_dap_memaccess_command, COMMAND_EXEC,
 297                         "set/get number of extra tck for mem-ap memory "
 298                         "bus access [0-255]");
 299
 300         return ERROR_OK;
 301 }