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   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2006 by Magnus Lundin                                   *
   6  *   lundin@mlu.mine.nu                                                    *
   7  *                                                                         *
   8  *   Copyright (C) 2008 by Spencer Oliver                                  *
   9  *   spen@spen-soft.co.uk                                                  *
  10  *                                                                         *
  11  *   This program is free software; you can redistribute it and/or modify  *
  12  *   it under the terms of the GNU General Public License as published by  *
  13  *   the Free Software Foundation; either version 2 of the License, or     *
  14  *   (at your option) any later version.                                   *
  15  *                                                                         *
  16  *   This program is distributed in the hope that it will be useful,       *
  17  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  18  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  19  *   GNU General Public License for more details.                          *
  20  *                                                                         *
  21  *   You should have received a copy of the GNU General Public License     *
  22  *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
  23  ***************************************************************************/
  24
  25 #ifndef ARMV7M_COMMON_H
  26 #define ARMV7M_COMMON_H
  27
  28 #include "arm_adi_v5.h"
  29 #include "arm.h"
  30 #include "armv7m_trace.h"
  31
  32 extern const int armv7m_psp_reg_map[];
  33 extern const int armv7m_msp_reg_map[];
  34
  35 const char *armv7m_exception_string(int number);
  36
  37 /* offsets into armv7m core register cache */
  38 enum {
  39         /* for convenience, the first set of indices match
  40          * the Cortex-M3/-M4 DCRSR selectors
  41          */
  42         ARMV7M_R0,
  43         ARMV7M_R1,
  44         ARMV7M_R2,
  45         ARMV7M_R3,
  46
  47         ARMV7M_R4,
  48         ARMV7M_R5,
  49         ARMV7M_R6,
  50         ARMV7M_R7,
  51
  52         ARMV7M_R8,
  53         ARMV7M_R9,
  54         ARMV7M_R10,
  55         ARMV7M_R11,
  56
  57         ARMV7M_R12,
  58         ARMV7M_R13,
  59         ARMV7M_R14,
  60         ARMV7M_PC = 15,
  61
  62         ARMV7M_xPSR = 16,
  63         ARMV7M_MSP,
  64         ARMV7M_PSP,
  65
  66         /* this next set of indices is arbitrary */
  67         ARMV7M_PRIMASK,
  68         ARMV7M_BASEPRI,
  69         ARMV7M_FAULTMASK,
  70         ARMV7M_CONTROL,
  71
  72         /* 32bit Floating-point registers */
  73         ARMV7M_S0,
  74         ARMV7M_S1,
  75         ARMV7M_S2,
  76         ARMV7M_S3,
  77         ARMV7M_S4,
  78         ARMV7M_S5,
  79         ARMV7M_S6,
  80         ARMV7M_S7,
  81         ARMV7M_S8,
  82         ARMV7M_S9,
  83         ARMV7M_S10,
  84         ARMV7M_S11,
  85         ARMV7M_S12,
  86         ARMV7M_S13,
  87         ARMV7M_S14,
  88         ARMV7M_S15,
  89         ARMV7M_S16,
  90         ARMV7M_S17,
  91         ARMV7M_S18,
  92         ARMV7M_S19,
  93         ARMV7M_S20,
  94         ARMV7M_S21,
  95         ARMV7M_S22,
  96         ARMV7M_S23,
  97         ARMV7M_S24,
  98         ARMV7M_S25,
  99         ARMV7M_S26,
 100         ARMV7M_S27,
 101         ARMV7M_S28,
 102         ARMV7M_S29,
 103         ARMV7M_S30,
 104         ARMV7M_S31,
 105
 106         /* 64bit Floating-point registers */
 107         ARMV7M_D0,
 108         ARMV7M_D1,
 109         ARMV7M_D2,
 110         ARMV7M_D3,
 111         ARMV7M_D4,
 112         ARMV7M_D5,
 113         ARMV7M_D6,
 114         ARMV7M_D7,
 115         ARMV7M_D8,
 116         ARMV7M_D9,
 117         ARMV7M_D10,
 118         ARMV7M_D11,
 119         ARMV7M_D12,
 120         ARMV7M_D13,
 121         ARMV7M_D14,
 122         ARMV7M_D15,
 123
 124         /* Floating-point status registers */
 125         ARMV7M_FPSID,
 126         ARMV7M_FPSCR,
 127         ARMV7M_FPEXC,
 128
 129         ARMV7M_LAST_REG,
 130 };
 131
 132 enum {
 133         FP_NONE = 0,
 134         FPv4_SP,
 135 };
 136
 137 #define ARMV7M_NUM_CORE_REGS (ARMV7M_xPSR + 1)
 138 #define ARMV7M_NUM_CORE_REGS_NOFP (ARMV7M_NUM_CORE_REGS + 6)
 139
 140 #define ARMV7M_COMMON_MAGIC 0x2A452A45
 141
 142 struct armv7m_common {
 143         struct arm      arm;
 144
 145         int common_magic;
 146         int exception_number;
 147
 148         /* AP this processor is connected to in the DAP */
 149         struct adiv5_ap *debug_ap;
 150
 151         int fp_feature;
 152         uint32_t demcr;
 153
 154         /* stlink is a high level adapter, does not support all functions */
 155         bool stlink;
 156
 157         struct armv7m_trace_config trace_config;
 158
 159         /* Direct processor core register read and writes */
 160         int (*load_core_reg_u32)(struct target *target, uint32_t num, uint32_t *value);
 161         int (*store_core_reg_u32)(struct target *target, uint32_t num, uint32_t value);
 162
 163         int (*examine_debug_reason)(struct target *target);
 164         int (*post_debug_entry)(struct target *target);
 165
 166         void (*pre_restore_context)(struct target *target);
 167 };
 168
 169 static inline struct armv7m_common *
 170 target_to_armv7m(struct target *target)
 171 {
 172         return container_of(target->arch_info, struct armv7m_common, arm);
 173 }
 174
 175 static inline bool is_armv7m(struct armv7m_common *armv7m)
 176 {
 177         return armv7m->common_magic == ARMV7M_COMMON_MAGIC;
 178 }
 179
 180 struct armv7m_algorithm {
 181         int common_magic;
 182
 183         enum arm_mode core_mode;
 184
 185         uint32_t context[ARMV7M_LAST_REG]; /* ARMV7M_NUM_REGS */
 186 };
 187
 188 struct reg_cache *armv7m_build_reg_cache(struct target *target);
 189 void armv7m_free_reg_cache(struct target *target);
 190
 191 enum armv7m_mode armv7m_number_to_mode(int number);
 192 int armv7m_mode_to_number(enum armv7m_mode mode);
 193
 194 int armv7m_arch_state(struct target *target);
 195 int armv7m_get_gdb_reg_list(struct target *target,
 196                 struct reg **reg_list[], int *reg_list_size,
 197                 enum target_register_class reg_class);
 198
 199 int armv7m_init_arch_info(struct target *target, struct armv7m_common *armv7m);
 200
 201 int armv7m_run_algorithm(struct target *target,
 202                 int num_mem_params, struct mem_param *mem_params,
 203                 int num_reg_params, struct reg_param *reg_params,
 204                 uint32_t entry_point, uint32_t exit_point,
 205                 int timeout_ms, void *arch_info);
 206
 207 int armv7m_start_algorithm(struct target *target,
 208                 int num_mem_params, struct mem_param *mem_params,
 209                 int num_reg_params, struct reg_param *reg_params,
 210                 uint32_t entry_point, uint32_t exit_point,
 211                 void *arch_info);
 212
 213 int armv7m_wait_algorithm(struct target *target,
 214                 int num_mem_params, struct mem_param *mem_params,
 215                 int num_reg_params, struct reg_param *reg_params,
 216                 uint32_t exit_point, int timeout_ms,
 217                 void *arch_info);
 218
 219 int armv7m_invalidate_core_regs(struct target *target);
 220
 221 int armv7m_restore_context(struct target *target);
 222
 223 int armv7m_checksum_memory(struct target *target,
 224                 uint32_t address, uint32_t count, uint32_t *checksum);
 225 int armv7m_blank_check_memory(struct target *target,
 226                 uint32_t address, uint32_t count, uint32_t *blank);
 227
 228 int armv7m_maybe_skip_bkpt_inst(struct target *target, bool *inst_found);
 229
 230 extern const struct command_registration armv7m_command_handlers[];
 231
 232 #endif /* ARMV7M_H */