src/target/etm.h

   1 /***************************************************************************
   2  *   Copyright (C) 2005, 2007 by Dominic Rath                              *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2007 by Vincent Palatin                                 *
   6  *   vincent.palatin_openocd@m4x.org                                       *
   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 ETM_H
  24 #define ETM_H
  25
  26 #include "trace.h"
  27 #include "arm_jtag.h"
  28
  29 struct image;
  30
  31 /* ETM registers (JTAG protocol) */
  32 enum
  33 {
  34         ETM_CTRL = 0x00,
  35         ETM_CONFIG = 0x01,
  36         ETM_TRIG_EVENT = 0x02,
  37         ETM_ASIC_CTRL = 0x03,
  38         ETM_STATUS = 0x04,
  39         ETM_SYS_CONFIG = 0x05,
  40         ETM_TRACE_RESOURCE_CTRL = 0x06,
  41         ETM_TRACE_EN_CTRL2 = 0x07,
  42         ETM_TRACE_EN_EVENT = 0x08,
  43         ETM_TRACE_EN_CTRL1 = 0x09,
  44         /* optional FIFOFULL */
  45         ETM_FIFOFULL_REGION = 0x0a,
  46         ETM_FIFOFULL_LEVEL = 0x0b,
  47         /* viewdata support */
  48         ETM_VIEWDATA_EVENT = 0x0c,
  49         ETM_VIEWDATA_CTRL1 = 0x0d,
  50         ETM_VIEWDATA_CTRL2 = 0x0e,      /* optional */
  51         ETM_VIEWDATA_CTRL3 = 0x0f,
  52         /* N pairs of ADDR_{COMPARATOR,ACCESS} registers */
  53         ETM_ADDR_COMPARATOR_VALUE = 0x10,
  54         ETM_ADDR_ACCESS_TYPE = 0x20,
  55         /* N pairs of DATA_COMPARATOR_{VALUE,MASK} registers */
  56         ETM_DATA_COMPARATOR_VALUE = 0x30,
  57         ETM_DATA_COMPARATOR_MASK = 0x40,
  58         /* N quads of COUNTER_{RELOAD_{VALUE,EVENT},ENABLE,VALUE} registers */
  59         ETM_COUNTER_RELOAD_VALUE = 0x50,
  60         ETM_COUNTER_ENABLE = 0x54,
  61         ETM_COUNTER_RELOAD_EVENT = 0x58,
  62         ETM_COUNTER_VALUE = 0x5c,
  63         /* 6 sequencer event transitions */
  64         ETM_SEQUENCER_EVENT = 0x60,
  65         ETM_SEQUENCER_STATE = 0x67,
  66         /* N triggered outputs */
  67         ETM_EXTERNAL_OUTPUT = 0x68,
  68         /* N task contexts */
  69         ETM_CONTEXTID_COMPARATOR_VALUE = 0x6c,
  70         ETM_CONTEXTID_COMPARATOR_MASK = 0x6f,
  71         ETM_ID = 0x79,
  72 };
  73
  74 struct etm_reg
  75 {
  76         uint32_t value;
  77         const struct etm_reg_info *reg_info;
  78         struct arm_jtag *jtag_info;
  79 };
  80
  81 /* Subset of ETM_CTRL bit assignments.  Many of these
  82  * control the configuration of trace output, which
  83  * hooks up either to ETB or to an external device.
  84  *
  85  * NOTE that these have evolved since the ~v1.3 defns ...
  86  */
  87 enum
  88 {
  89         ETM_CTRL_POWERDOWN      = (1 << 0),
  90         ETM_CTRL_MONITOR_CPRT   = (1 << 1),
  91
  92         /* bits 3:2 == trace type */
  93         ETM_CTRL_TRACE_DATA     = (1 << 2),
  94         ETM_CTRL_TRACE_ADDR     = (2 << 2),
  95         ETM_CTRL_TRACE_MASK     = (3 << 2),
  96
  97         /* Port width (bits 21 and 6:4) */
  98         ETM_PORT_4BIT           = 0x00,
  99         ETM_PORT_8BIT           = 0x10,
 100         ETM_PORT_16BIT          = 0x20,
 101         ETM_PORT_24BIT          = 0x30,
 102         ETM_PORT_32BIT          = 0x40,
 103         ETM_PORT_48BIT          = 0x50,
 104         ETM_PORT_64BIT          = 0x60,
 105         ETM_PORT_1BIT           = 0x00 | (1 << 21),
 106         ETM_PORT_2BIT           = 0x10 | (1 << 21),
 107         ETM_PORT_WIDTH_MASK     = 0x70 | (1 << 21),
 108
 109         ETM_CTRL_FIFOFULL_STALL = (1 << 7),
 110         ETM_CTRL_BRANCH_OUTPUT  = (1 << 8),
 111         ETM_CTRL_DBGRQ          = (1 << 9),
 112         ETM_CTRL_ETM_PROG       = (1 << 10),
 113         ETM_CTRL_ETMEN          = (1 << 11),
 114         ETM_CTRL_CYCLE_ACCURATE = (1 << 12),
 115
 116         /* Clocking modes -- up to v2.1, bit 13 */
 117         ETM_PORT_FULL_CLOCK     = (0 << 13),
 118         ETM_PORT_HALF_CLOCK     = (1 << 13),
 119         ETM_PORT_CLOCK_MASK     = (1 << 13),
 120
 121         // bits 15:14 == context ID size used in tracing
 122         ETM_CTRL_CONTEXTID_NONE = (0 << 14),
 123         ETM_CTRL_CONTEXTID_8    = (1 << 14),
 124         ETM_CTRL_CONTEXTID_16   = (2 << 14),
 125         ETM_CTRL_CONTEXTID_32   = (3 << 14),
 126         ETM_CTRL_CONTEXTID_MASK = (3 << 14),
 127
 128         /* Port modes -- bits 17:16, tied to clocking mode */
 129         ETM_PORT_NORMAL         = (0 << 16),
 130         ETM_PORT_MUXED          = (1 << 16),
 131         ETM_PORT_DEMUXED        = (2 << 16),
 132         ETM_PORT_MODE_MASK      = (3 << 16),
 133
 134         // bits 31:18 defined in v3.0 and later (e.g. ARM11+)
 135 };
 136
 137 /* forward-declare ETM context */
 138 struct etm_context;
 139
 140 struct etm_capture_driver
 141 {
 142         const char *name;
 143         const struct command_registration *commands;
 144         int (*init)(struct etm_context *etm_ctx);
 145         trace_status_t (*status)(struct etm_context *etm_ctx);
 146         int (*read_trace)(struct etm_context *etm_ctx);
 147         int (*start_capture)(struct etm_context *etm_ctx);
 148         int (*stop_capture)(struct etm_context *etm_ctx);
 149 };
 150
 151 enum
 152 {
 153         ETMV1_TRACESYNC_CYCLE = 0x1,
 154         ETMV1_TRIGGER_CYCLE = 0x2,
 155 };
 156
 157 struct etmv1_trace_data
 158 {
 159         uint8_t pipestat;       /* bits 0-2 pipeline status */
 160         uint16_t packet;                /* packet data (4, 8 or 16 bit) */
 161         int flags;              /* ETMV1_TRACESYNC_CYCLE, ETMV1_TRIGGER_CYCLE */
 162 };
 163
 164 /* describe a trace context
 165  * if support for ETMv2 or ETMv3 is to be implemented,
 166  * this will have to be split into version independent elements
 167  * and a version specific part
 168  */
 169 struct etm_context
 170 {
 171         struct target *target;          /* target this ETM is connected to */
 172         struct reg_cache *reg_cache;            /* ETM register cache */
 173         struct etm_capture_driver *capture_driver;      /* driver used to access ETM data */
 174         void *capture_driver_priv;      /* capture driver private data */
 175         trace_status_t capture_status;  /* current state of capture run */
 176         struct etmv1_trace_data *trace_data;    /* trace data */
 177         uint32_t trace_depth;           /* number of cycles to be analyzed, 0 if no data available */
 178         uint32_t control;       /* shadow of ETM_CTRL */
 179         int /*arm_state*/ core_state;   /* current core state */
 180         struct image *image;            /* source for target opcodes */
 181         uint32_t pipe_index;            /* current trace cycle */
 182         uint32_t data_index;            /* cycle holding next data packet */
 183         bool data_half;                 /* port half on a 16 bit port */
 184         bool pc_ok;                     /* full PC has been acquired */
 185         bool ptr_ok;                    /* whether last_ptr is valid */
 186         uint8_t bcd_vers;               /* e.g. 0x13 == ETMv1.3 */
 187         uint32_t config;                /* cache of ETM_CONFIG value */
 188         uint32_t id;                    /* cache of ETM_ID value, or 0 */
 189         uint32_t current_pc;            /* current program counter */
 190         uint32_t last_branch;           /* last branch address output */
 191         uint32_t last_branch_reason;    /* type of last branch encountered */
 192         uint32_t last_ptr;              /* address of the last data access */
 193         uint32_t last_instruction;      /* index of last executed (to calc timings) */
 194 };
 195
 196 /* PIPESTAT values */
 197 typedef enum
 198 {
 199         STAT_IE = 0x0,
 200         STAT_ID = 0x1,
 201         STAT_IN = 0x2,
 202         STAT_WT = 0x3,
 203         STAT_BE = 0x4,
 204         STAT_BD = 0x5,
 205         STAT_TR = 0x6,
 206         STAT_TD = 0x7
 207 } etmv1_pipestat_t;
 208
 209 /* branch reason values */
 210 typedef enum
 211 {
 212         BR_NORMAL  = 0x0, /* Normal PC change : periodic synchro (ETMv1.1) */
 213         BR_ENABLE  = 0x1, /* Trace has been enabled */
 214         BR_RESTART = 0x2, /* Trace restarted after a FIFO overflow */
 215         BR_NODEBUG = 0x3, /* ARM has exited for debug state */
 216         BR_PERIOD  = 0x4, /* Peridioc synchronization point (ETM >= v1.2)*/
 217         BR_RSVD5   = 0x5, /* reserved */
 218         BR_RSVD6   = 0x6, /* reserved */
 219         BR_RSVD7   = 0x7, /* reserved */
 220 } etmv1_branch_reason_t;
 221
 222 struct reg_cache* etm_build_reg_cache(struct target *target,
 223                 struct arm_jtag *jtag_info, struct etm_context *etm_ctx);
 224
 225 int etm_setup(struct target *target);
 226
 227 extern const struct command_registration etm_command_handlers[];
 228
 229 #define ERROR_ETM_INVALID_DRIVER        (-1300)
 230 #define ERROR_ETM_PORTMODE_NOT_SUPPORTED        (-1301)
 231 #define ERROR_ETM_CAPTURE_INIT_FAILED   (-1302)
 232 #define ERROR_ETM_ANALYSIS_FAILED       (-1303)
 233
 234 #endif /* ETM_H */