src/target/smp.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2
   3 /***************************************************************************
   4  *                                                                         *
   5  * Copyright (C) ST-Ericsson SA 2011                                       *
   6  * Author: Michel Jaouen <michel.jaouen@stericsson.com> for ST-Ericsson.   *
   7  ***************************************************************************/
   8
   9 #ifdef HAVE_CONFIG_H
  10 #include "config.h"
  11 #endif
  12
  13 #include "server/server.h"
  14
  15 #include "target/target.h"
  16
  17 #include "server/gdb_server.h"
  18 #include "smp.h"
  19 #include "helper/binarybuffer.h"
  20
  21 /* DEPRECATED: gdb_read_smp_packet/gdb_write_smp_packet to be removed      */
  22 /*  implementation of new packet in gdb interface for smp feature          */
  23 /*                                                                         */
  24 /*   j : smp  status request                                               */
  25 /*   J : smp  set request                                                  */
  26 /*                                                                         */
  27 /*   jc :read core id displayed by gdb connection                          */
  28 /*   reply XXXXXXXX core id is int32_t , 8 hex digits                      */
  29 /*                                                                         */
  30 /*   Reply ENN error not supported (target not smp)                        */
  31 /*                                                                         */
  32 /*   JcXX  set core id displayed at next gdb continue                      */
  33 /*   maximum 8 bytes described core id int32_t (8 hex digits)              */
  34 /*  (core id -1 , reserved for returning to normal continue mode) */
  35 /*  Reply ENN error not supported(target not smp,core id out of range)     */
  36 /*  Reply OK : for success                                                 */
  37 /*                                                                         */
  38 /*  handling of this packet within gdb can be done by the creation         */
  39 /*  internal variable by mean of function allocate_computed_value          */
  40 /*  set $_core 1 => Jc01 packet is sent                                    */
  41 /*  print $_core => jc packet is sent and result is affected in $          */
  42 /*  Another way to test this packet is the usage of maintenance packet     */
  43 /*  maint packet Jc01                                                      */
  44 /*  maint packet jc                                                        */
  45
  46 /* packet j :smp status request */
  47 #define DEPRECATED_MSG "DEPRECATED: This method is deprecated in favor of the hwthread pseudo RTOS"
  48 int gdb_read_smp_packet(struct connection *connection,
  49                 char const *packet, int packet_size)
  50 {
  51         struct target *target = get_target_from_connection(connection);
  52         int retval = ERROR_OK;
  53
  54         LOG_WARNING(DEPRECATED_MSG);
  55
  56         if (target->smp) {
  57                 if (strncmp(packet, "jc", 2) == 0) {
  58                         const uint32_t len = sizeof(target->gdb_service->core[0]);
  59                         char hex_buffer[len * 2 + 1];
  60                         uint8_t buffer[len];
  61                         buf_set_u32(buffer, 0, len * 8, target->gdb_service->core[0]);
  62                         size_t pkt_len = hexify(hex_buffer, buffer, sizeof(buffer),
  63                                 sizeof(hex_buffer));
  64
  65                         retval = gdb_put_packet(connection, hex_buffer, pkt_len);
  66                 }
  67         } else
  68                 retval = gdb_put_packet(connection, "E01", 3);
  69         return retval;
  70 }
  71
  72 /* J :  smp set request */
  73 int gdb_write_smp_packet(struct connection *connection,
  74                 char const *packet, int packet_size)
  75 {
  76         struct target *target = get_target_from_connection(connection);
  77         char *separator;
  78         int coreid = 0;
  79         int retval = ERROR_OK;
  80
  81         LOG_WARNING(DEPRECATED_MSG);
  82
  83         /* skip command character */
  84         if (target->smp) {
  85                 if (strncmp(packet, "Jc", 2) == 0) {
  86                         packet += 2;
  87                         coreid = strtoul(packet, &separator, 16);
  88                         target->gdb_service->core[1] = coreid;
  89                         retval = gdb_put_packet(connection, "OK", 2);
  90                 }
  91         } else
  92                 retval = gdb_put_packet(connection, "E01", 3);
  93
  94         return retval;
  95 }
  96
  97 COMMAND_HANDLER(default_handle_smp_command)
  98 {
  99         struct target *target = get_current_target(CMD_CTX);
 100         struct target_list *head;
 101
 102         if (CMD_ARGC > 1)
 103                 return ERROR_COMMAND_SYNTAX_ERROR;
 104
 105         if (!CMD_ARGC) {
 106                 command_print(CMD, "%s", target->smp ? "on" : "off");
 107                 return ERROR_OK;
 108         }
 109
 110         if (!strcmp(CMD_ARGV[0], "on")) {
 111                 foreach_smp_target(head, target->smp_targets)
 112                         head->target->smp = 1;
 113
 114                 return ERROR_OK;
 115         }
 116
 117         if (!strcmp(CMD_ARGV[0], "off")) {
 118                 foreach_smp_target(head, target->smp_targets)
 119                         head->target->smp = 0;
 120
 121                 /* fixes the target display to the debugger */
 122                 if (!list_empty(target->smp_targets))
 123                         target->gdb_service->target = target;
 124
 125                 return ERROR_OK;
 126         }
 127
 128         return ERROR_COMMAND_SYNTAX_ERROR;
 129 }
 130
 131 COMMAND_HANDLER(handle_smp_gdb_command)
 132 {
 133         struct target *target = get_current_target(CMD_CTX);
 134         int retval = ERROR_OK;
 135
 136         LOG_WARNING(DEPRECATED_MSG);
 137
 138         if (!list_empty(target->smp_targets)) {
 139                 if (CMD_ARGC == 1) {
 140                         int coreid = 0;
 141                         COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], coreid);
 142                         if (retval != ERROR_OK)
 143                                 return retval;
 144                         target->gdb_service->core[1] = coreid;
 145
 146                 }
 147                 command_print(CMD, "gdb coreid  %" PRId32 " -> %" PRId32, target->gdb_service->core[0]
 148                         , target->gdb_service->core[1]);
 149         }
 150         return ERROR_OK;
 151 }
 152
 153 const struct command_registration smp_command_handlers[] = {
 154         {
 155                 .name = "smp",
 156                 .handler = default_handle_smp_command,
 157                 .mode = COMMAND_EXEC,
 158                 .help = "smp handling",
 159                 .usage = "[on|off]",
 160         },
 161         {
 162                 .name = "smp_gdb",
 163                 .handler = handle_smp_gdb_command,
 164                 .mode = COMMAND_EXEC,
 165                 .help = "display/fix current core played to gdb",
 166                 .usage = "",
 167         },
 168         COMMAND_REGISTRATION_DONE
 169 };