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   1 /***************************************************************************
   2  *   Copyright (C) 2008 digenius technology GmbH.                          *
   3  *   Michael Bruck                                                         *
   4  *                                                                         *
   5  *   Copyright (C) 2008 Georg Acher <acher@in.tum.de>                      *
   6  *                                                                         *
   7  *   This program is free software; you can redistribute it and/or modify  *
   8  *   it under the terms of the GNU General Public License as published by  *
   9  *   the Free Software Foundation; either version 2 of the License, or     *
  10  *   (at your option) any later version.                                   *
  11  *                                                                         *
  12  *   This program is distributed in the hope that it will be useful,       *
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  15  *   GNU General Public License for more details.                          *
  16  *                                                                         *
  17  *   You should have received a copy of the GNU General Public License     *
  18  *   along with this program; if not, write to the                         *
  19  *   Free Software Foundation, Inc.,                                       *
  20  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  21  ***************************************************************************/
  22
  23 #ifndef ARM11_H
  24 #define ARM11_H
  25
  26 #include <target/armv4_5.h>
  27 #include <target/arm_dpm.h>
  28
  29 #define ARM11_TAP_DEFAULT                       TAP_INVALID
  30
  31 #define CHECK_RETVAL(action)                    \
  32         do {                                    \
  33                 int __retval = (action);        \
  34                 if (__retval != ERROR_OK) {     \
  35                         LOG_DEBUG("error while calling \"%s\"", \
  36                                 # action );     \
  37                         return __retval;        \
  38                 }                               \
  39         } while (0)
  40
  41 /* bits from ARMv7 DIDR */
  42 enum arm11_debug_version
  43 {
  44         ARM11_DEBUG_V6                  = 0x01,
  45         ARM11_DEBUG_V61                 = 0x02,
  46         ARM11_DEBUG_V7                  = 0x03,
  47         ARM11_DEBUG_V7_CP14             = 0x04,
  48 };
  49
  50 struct arm11_common
  51 {
  52         struct arm      arm;
  53
  54         /** Debug module state. */
  55         struct arm_dpm dpm;
  56
  57         size_t  brp;                    /**< Number of Breakpoint Register Pairs from DIDR      */
  58         size_t  wrp;                    /**< Number of Watchpoint Register Pairs from DIDR      */
  59         size_t  free_brps;              /**< Number of breakpoints allocated */
  60
  61         uint32_t dscr;                  /**< Last retrieved DSCR value. */
  62
  63         uint32_t saved_rdtr;
  64         uint32_t saved_wdtr;
  65
  66         bool is_rdtr_saved;
  67         bool is_wdtr_saved;
  68
  69         bool    simulate_reset_on_next_halt;    /**< Perform cleanups of the ARM state on next halt */
  70
  71         struct arm_jtag jtag_info;
  72 };
  73
  74 static inline struct arm11_common *target_to_arm11(struct target *target)
  75 {
  76         return container_of(target->arch_info, struct arm11_common,
  77                         arm);
  78 }
  79
  80 /**
  81  * ARM11 DBGTAP instructions
  82  *
  83  * http://infocenter.arm.com/help/topic/com.arm.doc.ddi0301f/I1006229.html
  84  */
  85 enum arm11_instructions
  86 {
  87         ARM11_EXTEST    = 0x00,
  88         ARM11_SCAN_N    = 0x02,
  89         ARM11_RESTART   = 0x04,
  90         ARM11_HALT          = 0x08,
  91         ARM11_INTEST    = 0x0C,
  92         ARM11_ITRSEL    = 0x1D,
  93         ARM11_IDCODE    = 0x1E,
  94         ARM11_BYPASS    = 0x1F,
  95 };
  96
  97 enum arm11_dscr
  98 {
  99
 100         ARM11_DSCR_METHOD_OF_DEBUG_ENTRY_MASK                                   = 0x0F << 2,
 101         ARM11_DSCR_METHOD_OF_DEBUG_ENTRY_HALT                                   = 0x00 << 2,
 102         ARM11_DSCR_METHOD_OF_DEBUG_ENTRY_BREAKPOINT                             = 0x01 << 2,
 103         ARM11_DSCR_METHOD_OF_DEBUG_ENTRY_WATCHPOINT                             = 0x02 << 2,
 104         ARM11_DSCR_METHOD_OF_DEBUG_ENTRY_BKPT_INSTRUCTION               = 0x03 << 2,
 105         ARM11_DSCR_METHOD_OF_DEBUG_ENTRY_EDBGRQ                                 = 0x04 << 2,
 106         ARM11_DSCR_METHOD_OF_DEBUG_ENTRY_VECTOR_CATCH                   = 0x05 << 2,
 107 };
 108
 109 enum arm11_sc7
 110 {
 111         ARM11_SC7_NULL                          = 0,
 112         ARM11_SC7_VCR                           = 7,
 113         ARM11_SC7_PC                            = 8,
 114         ARM11_SC7_BVR0                          = 64,
 115         ARM11_SC7_BCR0                          = 80,
 116         ARM11_SC7_WVR0                          = 96,
 117         ARM11_SC7_WCR0                          = 112,
 118 };
 119
 120 #endif /* ARM11_H */