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   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2007,2008 Øyvind Harboe                                      *
   6  *   oyvind.harboe@zylin.com                                               *
   7  *                                                                         *
   8  *   This program is free software; you can redistribute it and/or modify  *
   9  *   it under the terms of the GNU General Public License as published by  *
  10  *   the Free Software Foundation; either version 2 of the License, or     *
  11  *   (at your option) any later version.                                   *
  12  *                                                                         *
  13  *   This program is distributed in the hope that it will be useful,       *
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  16  *   GNU General Public License for more details.                          *
  17  *                                                                         *
  18  *   You should have received a copy of the GNU General Public License     *
  19  *   along with this program; if not, write to the                         *
  20  *   Free Software Foundation, Inc.,                                       *
  21  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  22  ***************************************************************************/
  23 #ifndef XSCALE_H
  24 #define XSCALE_H
  25
  26 #include "target.h"
  27 #include "register.h"
  28 #include "armv4_5.h"
  29 #include "armv4_5_mmu.h"
  30 #include "trace.h"
  31 #include "image.h"
  32
  33 #define XSCALE_COMMON_MAGIC 0x58534341
  34
  35 typedef struct xscale_jtag_s
  36 {
  37         /* position in JTAG scan chain */
  38         int chain_pos;
  39
  40         /* IR length and instructions */
  41         int ir_length;
  42         u32 dbgrx;
  43         u32 dbgtx;
  44         u32 ldic;
  45         u32 dcsr;
  46 } xscale_jtag_t;
  47
  48 enum xscale_debug_reason
  49 {
  50         XSCALE_DBG_REASON_GENERIC,
  51         XSCALE_DBG_REASON_RESET,
  52         XSCALE_DBG_REASON_TB_FULL,
  53 };
  54
  55 enum xscale_trace_entry_type
  56 {
  57         XSCALE_TRACE_MESSAGE = 0x0,
  58         XSCALE_TRACE_ADDRESS = 0x1,
  59 };
  60
  61 typedef struct xscale_trace_entry_s
  62 {
  63         u8 data;
  64         enum xscale_trace_entry_type type;
  65 } xscale_trace_entry_t;
  66
  67 typedef struct xscale_trace_data_s
  68 {
  69         xscale_trace_entry_t *entries;
  70         int depth;
  71         u32 chkpt0;
  72         u32 chkpt1;
  73         u32 last_instruction;
  74         struct xscale_trace_data_s *next;
  75 } xscale_trace_data_t;
  76
  77 typedef struct xscale_trace_s
  78 {
  79         trace_status_t capture_status;  /* current state of capture run */
  80         image_t *image;                                 /* source for target opcodes */
  81         xscale_trace_data_t *data;              /* linked list of collected trace data */
  82         int buffer_enabled;                             /* whether trace buffer is enabled */
  83         int buffer_fill;                                /* maximum number of trace runs to read (-1 for wrap-around) */
  84         int pc_ok;
  85         u32 current_pc;
  86         armv4_5_state_t core_state;             /* current core state (ARM, Thumb, Jazelle) */
  87 } xscale_trace_t;
  88
  89 typedef struct xscale_common_s
  90 {
  91         int common_magic;
  92
  93         /* XScale registers (CP15, DBG) */
  94         reg_cache_t *reg_cache;
  95
  96         /* pxa250, pxa255, pxa27x, ixp42x, ... */
  97         char *variant;
  98
  99         xscale_jtag_t jtag_info;
 100
 101         /* current state of the debug handler */
 102         int handler_installed;
 103         int handler_running;
 104         u32 handler_address;
 105
 106         /* target-endian buffers with exception vectors */
 107         u32 low_vectors[8];
 108         u32 high_vectors[8];
 109
 110         /* static low vectors */
 111         u8 static_low_vectors_set;      /* bit field with static vectors set by the user */
 112         u8 static_high_vectors_set; /* bit field with static vectors set by the user */
 113         u32 static_low_vectors[8];
 114         u32 static_high_vectors[8];
 115
 116         /* DCache cleaning */
 117         u32 cache_clean_address;
 118
 119         /* whether hold_rst and ext_dbg_break should be set */
 120         int hold_rst;
 121         int external_debug_break;
 122
 123         /* breakpoint / watchpoint handling */
 124         int force_hw_bkpts;
 125         int dbr_available;
 126         int dbr0_used;
 127         int dbr1_used;
 128         int ibcr_available;
 129         int ibcr0_used;
 130         int     ibcr1_used;
 131         u32 arm_bkpt;
 132         u16 thumb_bkpt;
 133
 134         u8 vector_catch;
 135
 136         xscale_trace_t trace;
 137
 138         int arch_debug_reason;
 139
 140         /* armv4/5 common stuff */
 141         armv4_5_common_t armv4_5_common;
 142
 143         /* MMU/Caches */
 144         armv4_5_mmu_common_t armv4_5_mmu;
 145         u32 cp15_control_reg;
 146
 147         /* possible future enhancements that go beyond XScale common stuff */
 148         void *arch_info;
 149
 150         int fast_memory_access;
 151 } xscale_common_t;
 152
 153 typedef struct xscale_reg_s
 154 {
 155         int dbg_handler_number;
 156         target_t *target;
 157 } xscale_reg_t;
 158
 159 enum
 160 {
 161         XSCALE_MAINID,          /* 0 */
 162         XSCALE_CACHETYPE,
 163         XSCALE_CTRL,
 164         XSCALE_AUXCTRL,
 165         XSCALE_TTB,
 166         XSCALE_DAC,
 167         XSCALE_FSR,
 168         XSCALE_FAR,
 169         XSCALE_PID,
 170         XSCALE_CPACCESS,
 171         XSCALE_IBCR0,           /* 10 */
 172         XSCALE_IBCR1,
 173         XSCALE_DBR0,
 174         XSCALE_DBR1,
 175         XSCALE_DBCON,
 176         XSCALE_TBREG,
 177         XSCALE_CHKPT0,
 178         XSCALE_CHKPT1,
 179         XSCALE_DCSR,
 180         XSCALE_TX,
 181         XSCALE_RX,                      /* 20 */
 182         XSCALE_TXRXCTRL,
 183 };
 184
 185 #define ERROR_XSCALE_NO_TRACE_DATA      (-1500)
 186
 187 #endif /* XSCALE_H */