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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 CORTEX_M_H
  26 #define CORTEX_M_H
  27
  28 #include "armv7m.h"
  29
  30 #define CORTEX_M_COMMON_MAGIC 0x1A451A45
  31
  32 #define SYSTEM_CONTROL_BASE 0x400FE000
  33
  34 #define ITM_TER0        0xE0000E00
  35 #define ITM_TPR         0xE0000E40
  36 #define ITM_TCR         0xE0000E80
  37 #define ITM_LAR         0xE0000FB0
  38 #define ITM_LAR_KEY     0xC5ACCE55
  39
  40 #define CPUID           0xE000ED00
  41 /* Debug Control Block */
  42 #define DCB_DHCSR       0xE000EDF0
  43 #define DCB_DCRSR       0xE000EDF4
  44 #define DCB_DCRDR       0xE000EDF8
  45 #define DCB_DEMCR       0xE000EDFC
  46
  47 #define DCRSR_WnR       (1 << 16)
  48
  49 #define DWT_CTRL        0xE0001000
  50 #define DWT_CYCCNT      0xE0001004
  51 #define DWT_COMP0       0xE0001020
  52 #define DWT_MASK0       0xE0001024
  53 #define DWT_FUNCTION0   0xE0001028
  54
  55 #define FP_CTRL         0xE0002000
  56 #define FP_REMAP        0xE0002004
  57 #define FP_COMP0        0xE0002008
  58 #define FP_COMP1        0xE000200C
  59 #define FP_COMP2        0xE0002010
  60 #define FP_COMP3        0xE0002014
  61 #define FP_COMP4        0xE0002018
  62 #define FP_COMP5        0xE000201C
  63 #define FP_COMP6        0xE0002020
  64 #define FP_COMP7        0xE0002024
  65
  66 #define FPU_CPACR       0xE000ED88
  67 #define FPU_FPCCR       0xE000EF34
  68 #define FPU_FPCAR       0xE000EF38
  69 #define FPU_FPDSCR      0xE000EF3C
  70
  71 #define TPIU_SSPSR      0xE0040000
  72 #define TPIU_CSPSR      0xE0040004
  73 #define TPIU_ACPR       0xE0040010
  74 #define TPIU_SPPR       0xE00400F0
  75 #define TPIU_FFSR       0xE0040300
  76 #define TPIU_FFCR       0xE0040304
  77 #define TPIU_FSCR       0xE0040308
  78
  79 /* DCB_DHCSR bit and field definitions */
  80 #define DBGKEY          (0xA05F << 16)
  81 #define C_DEBUGEN       (1 << 0)
  82 #define C_HALT          (1 << 1)
  83 #define C_STEP          (1 << 2)
  84 #define C_MASKINTS      (1 << 3)
  85 #define S_REGRDY        (1 << 16)
  86 #define S_HALT          (1 << 17)
  87 #define S_SLEEP         (1 << 18)
  88 #define S_LOCKUP        (1 << 19)
  89 #define S_RETIRE_ST     (1 << 24)
  90 #define S_RESET_ST      (1 << 25)
  91
  92 /* DCB_DEMCR bit and field definitions */
  93 #define TRCENA                  (1 << 24)
  94 #define VC_HARDERR              (1 << 10)
  95 #define VC_INTERR               (1 << 9)
  96 #define VC_BUSERR               (1 << 8)
  97 #define VC_STATERR              (1 << 7)
  98 #define VC_CHKERR               (1 << 6)
  99 #define VC_NOCPERR              (1 << 5)
 100 #define VC_MMERR                (1 << 4)
 101 #define VC_CORERESET    (1 << 0)
 102
 103 #define NVIC_ICTR               0xE000E004
 104 #define NVIC_ISE0               0xE000E100
 105 #define NVIC_ICSR               0xE000ED04
 106 #define NVIC_AIRCR              0xE000ED0C
 107 #define NVIC_SHCSR              0xE000ED24
 108 #define NVIC_CFSR               0xE000ED28
 109 #define NVIC_MMFSRb             0xE000ED28
 110 #define NVIC_BFSRb              0xE000ED29
 111 #define NVIC_USFSRh             0xE000ED2A
 112 #define NVIC_HFSR               0xE000ED2C
 113 #define NVIC_DFSR               0xE000ED30
 114 #define NVIC_MMFAR              0xE000ED34
 115 #define NVIC_BFAR               0xE000ED38
 116
 117 /* NVIC_AIRCR bits */
 118 #define AIRCR_VECTKEY           (0x5FA << 16)
 119 #define AIRCR_SYSRESETREQ       (1 << 2)
 120 #define AIRCR_VECTCLRACTIVE     (1 << 1)
 121 #define AIRCR_VECTRESET         (1 << 0)
 122 /* NVIC_SHCSR bits */
 123 #define SHCSR_BUSFAULTENA       (1 << 17)
 124 /* NVIC_DFSR bits */
 125 #define DFSR_HALTED                     1
 126 #define DFSR_BKPT                       2
 127 #define DFSR_DWTTRAP            4
 128 #define DFSR_VCATCH                     8
 129
 130 #define FPCR_CODE 0
 131 #define FPCR_LITERAL 1
 132 #define FPCR_REPLACE_REMAP  (0 << 30)
 133 #define FPCR_REPLACE_BKPT_LOW  (1 << 30)
 134 #define FPCR_REPLACE_BKPT_HIGH  (2 << 30)
 135 #define FPCR_REPLACE_BKPT_BOTH  (3 << 30)
 136
 137 struct cortex_m_fp_comparator {
 138         int used;
 139         int type;
 140         uint32_t fpcr_value;
 141         uint32_t fpcr_address;
 142 };
 143
 144 struct cortex_m_dwt_comparator {
 145         int used;
 146         uint32_t comp;
 147         uint32_t mask;
 148         uint32_t function;
 149         uint32_t dwt_comparator_address;
 150 };
 151
 152 enum cortex_m_soft_reset_config {
 153         CORTEX_M_RESET_SYSRESETREQ,
 154         CORTEX_M_RESET_VECTRESET,
 155 };
 156
 157 enum cortex_m_isrmasking_mode {
 158         CORTEX_M_ISRMASK_AUTO,
 159         CORTEX_M_ISRMASK_OFF,
 160         CORTEX_M_ISRMASK_ON,
 161 };
 162
 163 struct cortex_m_common {
 164         int common_magic;
 165
 166         /* Context information */
 167         uint32_t dcb_dhcsr;
 168         uint32_t nvic_dfsr;  /* Debug Fault Status Register - shows reason for debug halt */
 169         uint32_t nvic_icsr;  /* Interrupt Control State Register - shows active and pending IRQ */
 170
 171         /* Flash Patch and Breakpoint (FPB) */
 172         int fp_num_lit;
 173         int fp_num_code;
 174         int fp_code_available;
 175         int fp_rev;
 176         int fpb_enabled;
 177         int auto_bp_type;
 178         struct cortex_m_fp_comparator *fp_comparator_list;
 179
 180         /* Data Watchpoint and Trace (DWT) */
 181         int dwt_num_comp;
 182         int dwt_comp_available;
 183         struct cortex_m_dwt_comparator *dwt_comparator_list;
 184         struct reg_cache *dwt_cache;
 185
 186         enum cortex_m_soft_reset_config soft_reset_config;
 187
 188         enum cortex_m_isrmasking_mode isrmasking_mode;
 189
 190         struct armv7m_common armv7m;
 191 };
 192
 193 static inline struct cortex_m_common *
 194 target_to_cm(struct target *target)
 195 {
 196         return container_of(target->arch_info,
 197                         struct cortex_m_common, armv7m);
 198 }
 199
 200 int cortex_m_examine(struct target *target);
 201 int cortex_m_set_breakpoint(struct target *target, struct breakpoint *breakpoint);
 202 int cortex_m_unset_breakpoint(struct target *target, struct breakpoint *breakpoint);
 203 int cortex_m_add_breakpoint(struct target *target, struct breakpoint *breakpoint);
 204 int cortex_m_remove_breakpoint(struct target *target, struct breakpoint *breakpoint);
 205 int cortex_m_set_watchpoint(struct target *target, struct watchpoint *watchpoint);
 206 int cortex_m_unset_watchpoint(struct target *target, struct watchpoint *watchpoint);
 207 int cortex_m_add_watchpoint(struct target *target, struct watchpoint *watchpoint);
 208 int cortex_m_remove_watchpoint(struct target *target, struct watchpoint *watchpoint);
 209 void cortex_m_enable_breakpoints(struct target *target);
 210 void cortex_m_enable_watchpoints(struct target *target);
 211 void cortex_m_dwt_setup(struct cortex_m_common *cm, struct target *target);
 212 void cortex_m_deinit_target(struct target *target);
 213
 214 #endif /* CORTEX_M_H */