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, see <http://www.gnu.org/licenses/>. *
  20  ***************************************************************************/
  21
  22 #ifndef ETM_H
  23 #define ETM_H
  24
  25 #include "trace.h"
  26 #include "arm_jtag.h"
  27
  28 struct image;
  29
  30 /* ETM registers (JTAG protocol) */
  31 enum {
  32         ETM_CTRL = 0x00,
  33         ETM_CONFIG = 0x01,
  34         ETM_TRIG_EVENT = 0x02,
  35         ETM_ASIC_CTRL = 0x03,
  36         ETM_STATUS = 0x04,
  37         ETM_SYS_CONFIG = 0x05,
  38         ETM_TRACE_RESOURCE_CTRL = 0x06,
  39         ETM_TRACE_EN_CTRL2 = 0x07,
  40         ETM_TRACE_EN_EVENT = 0x08,
  41         ETM_TRACE_EN_CTRL1 = 0x09,
  42         /* optional FIFOFULL */
  43         ETM_FIFOFULL_REGION = 0x0a,
  44         ETM_FIFOFULL_LEVEL = 0x0b,
  45         /* viewdata support */
  46         ETM_VIEWDATA_EVENT = 0x0c,
  47         ETM_VIEWDATA_CTRL1 = 0x0d,
  48         ETM_VIEWDATA_CTRL2 = 0x0e,      /* optional */
  49         ETM_VIEWDATA_CTRL3 = 0x0f,
  50         /* N pairs of ADDR_{COMPARATOR,ACCESS} registers */
  51         ETM_ADDR_COMPARATOR_VALUE = 0x10,
  52         ETM_ADDR_ACCESS_TYPE = 0x20,
  53         /* N pairs of DATA_COMPARATOR_{VALUE,MASK} registers */
  54         ETM_DATA_COMPARATOR_VALUE = 0x30,
  55         ETM_DATA_COMPARATOR_MASK = 0x40,
  56         /* N quads of COUNTER_{RELOAD_{VALUE,EVENT},ENABLE,VALUE} registers */
  57         ETM_COUNTER_RELOAD_VALUE = 0x50,
  58         ETM_COUNTER_ENABLE = 0x54,
  59         ETM_COUNTER_RELOAD_EVENT = 0x58,
  60         ETM_COUNTER_VALUE = 0x5c,
  61         /* 6 sequencer event transitions */
  62         ETM_SEQUENCER_EVENT = 0x60,
  63         ETM_SEQUENCER_STATE = 0x67,
  64         /* N triggered outputs */
  65         ETM_EXTERNAL_OUTPUT = 0x68,
  66         /* N task contexts */
  67         ETM_CONTEXTID_COMPARATOR_VALUE = 0x6c,
  68         ETM_CONTEXTID_COMPARATOR_MASK = 0x6f,
  69         ETM_ID = 0x79,
  70 };
  71
  72 struct etm_reg {
  73         uint8_t value[4];
  74         const struct etm_reg_info *reg_info;
  75         struct arm_jtag *jtag_info;
  76 };
  77
  78 /* Subset of ETM_CTRL bit assignments.  Many of these
  79  * control the configuration of trace output, which
  80  * hooks up either to ETB or to an external device.
  81  *
  82  * NOTE that these have evolved since the ~v1.3 defns ...
  83  */
  84 enum {
  85         ETM_CTRL_POWERDOWN      = (1 << 0),
  86         ETM_CTRL_MONITOR_CPRT   = (1 << 1),
  87
  88         /* bits 3:2 == trace type */
  89         ETM_CTRL_TRACE_DATA     = (1 << 2),
  90         ETM_CTRL_TRACE_ADDR     = (2 << 2),
  91         ETM_CTRL_TRACE_MASK     = (3 << 2),
  92
  93         /* Port width (bits 21 and 6:4) */
  94         ETM_PORT_4BIT           = 0x00,
  95         ETM_PORT_8BIT           = 0x10,
  96         ETM_PORT_16BIT          = 0x20,
  97         ETM_PORT_24BIT          = 0x30,
  98         ETM_PORT_32BIT          = 0x40,
  99         ETM_PORT_48BIT          = 0x50,
 100         ETM_PORT_64BIT          = 0x60,
 101         ETM_PORT_1BIT           = 0x00 | (1 << 21),
 102         ETM_PORT_2BIT           = 0x10 | (1 << 21),
 103         ETM_PORT_WIDTH_MASK     = 0x70 | (1 << 21),
 104
 105         ETM_CTRL_FIFOFULL_STALL = (1 << 7),
 106         ETM_CTRL_BRANCH_OUTPUT  = (1 << 8),
 107         ETM_CTRL_DBGRQ          = (1 << 9),
 108         ETM_CTRL_ETM_PROG       = (1 << 10),
 109         ETM_CTRL_ETMEN          = (1 << 11),
 110         ETM_CTRL_CYCLE_ACCURATE = (1 << 12),
 111
 112         /* Clocking modes -- up to v2.1, bit 13 */
 113         ETM_PORT_FULL_CLOCK     = (0 << 13),
 114         ETM_PORT_HALF_CLOCK     = (1 << 13),
 115         ETM_PORT_CLOCK_MASK     = (1 << 13),
 116
 117         /* bits 15:14 == context ID size used in tracing */
 118         ETM_CTRL_CONTEXTID_NONE = (0 << 14),
 119         ETM_CTRL_CONTEXTID_8    = (1 << 14),
 120         ETM_CTRL_CONTEXTID_16   = (2 << 14),
 121         ETM_CTRL_CONTEXTID_32   = (3 << 14),
 122         ETM_CTRL_CONTEXTID_MASK = (3 << 14),
 123
 124         /* Port modes -- bits 17:16, tied to clocking mode */
 125         ETM_PORT_NORMAL         = (0 << 16),
 126         ETM_PORT_MUXED          = (1 << 16),
 127         ETM_PORT_DEMUXED        = (2 << 16),
 128         ETM_PORT_MODE_MASK      = (3 << 16),
 129
 130         /* bits 31:18 defined in v3.0 and later (e.g. ARM11+) */
 131 };
 132
 133 /* forward-declare ETM context */
 134 struct etm_context;
 135
 136 struct etm_capture_driver {
 137         const char *name;
 138         const struct command_registration *commands;
 139         int (*init)(struct etm_context *etm_ctx);
 140         trace_status_t (*status)(struct etm_context *etm_ctx);
 141         int (*read_trace)(struct etm_context *etm_ctx);
 142         int (*start_capture)(struct etm_context *etm_ctx);
 143         int (*stop_capture)(struct etm_context *etm_ctx);
 144 };
 145
 146 enum {
 147         ETMV1_TRACESYNC_CYCLE = 0x1,
 148         ETMV1_TRIGGER_CYCLE = 0x2,
 149 };
 150
 151 struct etmv1_trace_data {
 152         uint8_t pipestat;       /* bits 0-2 pipeline status */
 153         uint16_t packet;                /* packet data (4, 8 or 16 bit) */
 154         int flags;              /* ETMV1_TRACESYNC_CYCLE, ETMV1_TRIGGER_CYCLE */
 155 };
 156
 157 /* describe a trace context
 158  * if support for ETMv2 or ETMv3 is to be implemented,
 159  * this will have to be split into version independent elements
 160  * and a version specific part
 161  */
 162 struct etm_context {
 163         struct target *target;          /* target this ETM is connected to */
 164         struct reg_cache *reg_cache;            /* ETM register cache */
 165         struct etm_capture_driver *capture_driver;      /* driver used to access ETM data */
 166         void *capture_driver_priv;      /* capture driver private data */
 167         trace_status_t capture_status;  /* current state of capture run */
 168         struct etmv1_trace_data *trace_data;    /* trace data */
 169         uint32_t trace_depth;           /* number of cycles to be analyzed, 0 if no data available */
 170         uint32_t control;       /* shadow of ETM_CTRL */
 171         int /*arm_state*/ core_state;   /* current core state */
 172         struct image *image;            /* source for target opcodes */
 173         uint32_t pipe_index;            /* current trace cycle */
 174         uint32_t data_index;            /* cycle holding next data packet */
 175         bool data_half;                 /* port half on a 16 bit port */
 176         bool pc_ok;                     /* full PC has been acquired */
 177         bool ptr_ok;                    /* whether last_ptr is valid */
 178         uint8_t bcd_vers;               /* e.g. 0x13 == ETMv1.3 */
 179         uint32_t config;                /* cache of ETM_CONFIG value */
 180         uint32_t id;                    /* cache of ETM_ID value, or 0 */
 181         uint32_t current_pc;            /* current program counter */
 182         uint32_t last_branch;           /* last branch address output */
 183         uint32_t last_branch_reason;    /* type of last branch encountered */
 184         uint32_t last_ptr;              /* address of the last data access */
 185         uint32_t last_instruction;      /* index of last executed (to calc timings) */
 186 };
 187
 188 /* PIPESTAT values */
 189 typedef enum {
 190         STAT_IE = 0x0,
 191         STAT_ID = 0x1,
 192         STAT_IN = 0x2,
 193         STAT_WT = 0x3,
 194         STAT_BE = 0x4,
 195         STAT_BD = 0x5,
 196         STAT_TR = 0x6,
 197         STAT_TD = 0x7
 198 } etmv1_pipestat_t;
 199
 200 /* branch reason values */
 201 typedef enum {
 202         BR_NORMAL  = 0x0, /* Normal PC change : periodic synchro (ETMv1.1) */
 203         BR_ENABLE  = 0x1, /* Trace has been enabled */
 204         BR_RESTART = 0x2, /* Trace restarted after a FIFO overflow */
 205         BR_NODEBUG = 0x3, /* ARM has exited for debug state */
 206         BR_PERIOD  = 0x4, /* Peridioc synchronization point (ETM >= v1.2)*/
 207         BR_RSVD5   = 0x5, /* reserved */
 208         BR_RSVD6   = 0x6, /* reserved */
 209         BR_RSVD7   = 0x7, /* reserved */
 210 } etmv1_branch_reason_t;
 211
 212 struct reg_cache *etm_build_reg_cache(struct target *target,
 213                 struct arm_jtag *jtag_info, struct etm_context *etm_ctx);
 214
 215 int etm_setup(struct target *target);
 216
 217 extern const struct command_registration etm_command_handlers[];
 218
 219 #define ERROR_ETM_INVALID_DRIVER        (-1300)
 220 #define ERROR_ETM_PORTMODE_NOT_SUPPORTED        (-1301)
 221 #define ERROR_ETM_CAPTURE_INIT_FAILED   (-1302)
 222 #define ERROR_ETM_ANALYSIS_FAILED       (-1303)
 223
 224 #endif /* ETM_H */