sim/common/sim-base.h

   1 /* Simulator pseudo baseclass.
   2    Copyright (C) 1997 Free Software Foundation, Inc.
   3    Contributed by Cygnus Support.
   4
   5 This file is part of GDB, the GNU debugger.
   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, or (at your option)
  10 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 along
  18 with this program; if not, write to the Free Software Foundation, Inc.,
  19 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  20
  21
  22 /* Simulator state pseudo baseclass.
  23
  24    Each simulator is required to have the file ``sim-main.h''.  That
  25    file includes ``sim-basics.h'', defines the base type ``sim_cia''
  26    (the data type that contains complete current instruction address
  27    information), include ``sim-base.h'':
  28
  29      #include "sim-basics.h"
  30      typedef address_word sim_cia;
  31      #include "sim-base.h"
  32
  33    finally, two data types ``struct _sim_cpu' and ``struct sim_state'
  34    are defined:
  35
  36      struct _sim_cpu {
  37         ... simulator specific members ...
  38         sim_cpu_base base;
  39      };
  40
  41      struct sim_state {
  42        sim_cpu cpu[MAX_NR_PROCESSORS];
  43      #if (WITH_SMP)
  44      #define STATE_CPU(sd,n) (&(sd)->cpu[n])
  45      #else
  46      #define STATE_CPU(sd,n) (&(sd)->cpu[0])
  47      #endif
  48        ... simulator specific members ...
  49        sim_state_base base;
  50      };
  51
  52    Note that `base' appears last.  This makes `base.magic' appear last
  53    in the entire struct and helps catch miscompilation errors. */
  54
  55
  56 #ifndef SIM_BASE_H
  57 #define SIM_BASE_H
  58
  59 /* Pre-declare certain types. */
  60
  61 /* typedef <target-dependant> sim_cia; */
  62 #ifndef NULL_CIA
  63 #define NULL_CIA ((sim_cia) 0)
  64 #endif
  65 #ifndef INVALID_INSTRUCTION_ADDRESS
  66 #define INVALID_INSTRUCTION_ADDRESS ((address_word)0 - 1)
  67 #endif
  68 typedef struct _sim_cpu sim_cpu;
  69
  70 #include "sim-module.h"
  71
  72 #include "sim-trace.h"
  73 #include "sim-profile.h"
  74 #include "sim-model.h"
  75 #include "sim-core.h"
  76 #include "sim-events.h"
  77 #include "sim-io.h"
  78 #include "sim-engine.h"
  79 #include "sim-watch.h"
  80 #include "sim-memopt.h"
  81
  82
  83 /* Global pointer to current state while sim_resume is running.
  84    On a machine with lots of registers, it might be possible to reserve
  85    one of them for current_state.  However on a machine with few registers
  86    current_state can't permanently live in one and indirecting through it
  87    will be slower [in which case one can have sim_resume set globals from
  88    current_state for faster access].
  89    If CURRENT_STATE_REG is defined, it means current_state is living in
  90    a global register.  */
  91
  92
  93 #ifdef CURRENT_STATE_REG
  94 /* FIXME: wip */
  95 #else
  96 extern struct sim_state *current_state;
  97 #endif
  98
  99
 100 /* The simulator may provide different (and faster) definition.  */
 101 #ifndef CURRENT_STATE
 102 #define CURRENT_STATE current_state
 103 #endif
 104
 105
 106 typedef struct {
 107
 108   /* Simulator's argv[0].  */
 109   const char *my_name;
 110 #define STATE_MY_NAME(sd) ((sd)->base.my_name)
 111
 112   /* Who opened the simulator.  */
 113   SIM_OPEN_KIND open_kind;
 114 #define STATE_OPEN_KIND(sd) ((sd)->base.open_kind)
 115
 116   /* The host callbacks.  */
 117   struct host_callback_struct *callback;
 118 #define STATE_CALLBACK(sd) ((sd)->base.callback)
 119
 120 #if 0 /* FIXME: Not ready yet.  */
 121   /* Stuff defined in sim-config.h.  */
 122   struct sim_config config;
 123 #define STATE_CONFIG(sd) ((sd)->base.config)
 124 #endif
 125
 126   /* List of installed module `init' handlers.  */
 127   MODULE_INIT_LIST *init_list;
 128 #define STATE_INIT_LIST(sd) ((sd)->base.init_list)
 129   /* List of installed module `uninstall' handlers.  */
 130   MODULE_UNINSTALL_LIST *uninstall_list;
 131 #define STATE_UNINSTALL_LIST(sd) ((sd)->base.uninstall_list)
 132   /* List of installed module `resume' handlers.  */
 133   MODULE_RESUME_LIST *resume_list;
 134 #define STATE_RESUME_LIST(sd) ((sd)->base.resume_list)
 135   /* List of installed module `suspend' handlers.  */
 136   MODULE_SUSPEND_LIST *suspend_list;
 137 #define STATE_SUSPEND_LIST(sd) ((sd)->base.suspend_list)
 138
 139   /* ??? This might be more appropriate in sim_cpu.  */
 140   /* Machine tables for this cpu.  See sim-model.h.  */
 141   const MODEL *model;
 142 #define STATE_MODEL(sd) ((sd)->base.model)
 143
 144   /* Supported options.  */
 145   struct option_list *options;
 146 #define STATE_OPTIONS(sd) ((sd)->base.options)
 147
 148   /* Non-zero if -v specified.  */
 149   int verbose_p;
 150 #define STATE_VERBOSE_P(sd) ((sd)->base.verbose_p)
 151
 152   /* If non NULL, the BFD architecture specified on the command line */
 153   const struct bfd_arch_info *architecture;
 154 #define STATE_ARCHITECTURE(sd) ((sd)->base.architecture)
 155
 156   /* If non NULL, the bfd target specified on the command line */
 157   const char *target;
 158 #define STATE_TARGET(sd) ((sd)->base.target)
 159
 160   /* In standalone simulator, this is the program's arguments passed
 161      on the command line.  */
 162   char **prog_argv;
 163 #define STATE_PROG_ARGV(sd) ((sd)->base.prog_argv)
 164
 165   /* The program's bfd.  */
 166   struct _bfd *prog_bfd;
 167 #define STATE_PROG_BFD(sd) ((sd)->base.prog_bfd)
 168
 169   /* The program's text section.  */
 170   struct sec *text_section;
 171   /* Starting and ending text section addresses from the bfd.  */
 172   SIM_ADDR text_start, text_end;
 173 #define STATE_TEXT_SECTION(sd) ((sd)->base.text_section)
 174 #define STATE_TEXT_START(sd) ((sd)->base.text_start)
 175 #define STATE_TEXT_END(sd) ((sd)->base.text_end)
 176
 177   /* Start address, set when the program is loaded from the bfd.  */
 178   SIM_ADDR start_addr;
 179 #define STATE_START_ADDR(sd) ((sd)->base.start_addr)
 180
 181 #if WITH_SCACHE
 182   /* Size of the simulator's cache, if any.
 183      This is not the target's cache.  It is the cache the simulator uses
 184      to process instructions.  */
 185   unsigned int scache_size;
 186 #define STATE_SCACHE_SIZE(sd) ((sd)->base.scache_size)
 187 #endif
 188
 189   /* FIXME: Move to top level sim_state struct (as some struct)?  */
 190 #ifdef SIM_HAVE_FLATMEM
 191   unsigned int mem_size;
 192 #define STATE_MEM_SIZE(sd) ((sd)->base.mem_size)
 193   unsigned int mem_base;
 194 #define STATE_MEM_BASE(sd) ((sd)->base.mem_base)
 195   unsigned char *memory;
 196 #define STATE_MEMORY(sd) ((sd)->base.memory)
 197 #endif
 198
 199   /* core memory bus */
 200 #define STATE_CORE(sd) (&(sd)->base.core)
 201   sim_core core;
 202
 203   /* memory-options for managing the core */
 204 #define STATE_MEMOPT(sd) ((sd)->base.memopt)
 205 #define STATE_MEMOPT_P(sd) (STATE_MEMOPT (sd) != NULL)
 206   sim_memopt *memopt;
 207
 208   /* event handler */
 209 #define STATE_EVENTS(sd) (&(sd)->base.events)
 210   sim_events events;
 211
 212   /* generic halt/resume engine */
 213   sim_engine engine;
 214 #define STATE_ENGINE(sd) (&(sd)->base.engine)
 215
 216   /* generic watchpoint support */
 217   sim_watchpoints watchpoints;
 218 #define STATE_WATCHPOINTS(sd) (&(sd)->base.watchpoints)
 219
 220   /* Marker for those wanting to do sanity checks.
 221      This should remain the last member of this struct to help catch
 222      miscompilation errors.  */
 223   int magic;
 224 #define SIM_MAGIC_NUMBER 0x4242
 225 #define STATE_MAGIC(sd) ((sd)->base.magic)
 226
 227 } sim_state_base;
 228
 229
 230 /* Pseudo baseclass for each cpu.  */
 231
 232 typedef struct {
 233
 234   /* Backlink to main state struct.  */
 235   SIM_DESC state;
 236 #define CPU_STATE(cpu) ((cpu)->base.state)
 237
 238   /* Processor specific core data */
 239   sim_cpu_core core;
 240 #define CPU_CORE(cpu) (& (cpu)->base.core)
 241
 242   /* Trace data.  See sim-trace.h.  */
 243   TRACE_DATA trace_data;
 244 #define CPU_TRACE_DATA(cpu) (& (cpu)->base.trace_data)
 245
 246   /* Maximum number of debuggable entities.
 247      This debugging is not intended for normal use.
 248      It is only enabled when the simulator is configured with --with-debug
 249      which shouldn't normally be specified.  */
 250 #ifndef MAX_DEBUG_VALUES
 251 #define MAX_DEBUG_VALUES 4
 252 #endif
 253
 254   /* Boolean array of specified debugging flags.  */
 255   char debug_flags[MAX_DEBUG_VALUES];
 256 #define CPU_DEBUG_FLAGS(cpu) ((cpu)->base.debug_flags)
 257   /* Standard values.  */
 258 #define DEBUG_INSN_IDX 0
 259 #define DEBUG_NEXT_IDX 2 /* simulator specific debug bits begin here */
 260
 261   /* Debugging output goes to this or stderr if NULL.
 262      We can't store `stderr' here as stderr goes through a callback.  */
 263   FILE *debug_file;
 264 #define CPU_DEBUG_FILE(cpu) ((cpu)->base.debug_file)
 265
 266   /* Profile data.  See sim-profile.h.  */
 267   PROFILE_DATA profile_data;
 268 #define CPU_PROFILE_DATA(cpu) (& (cpu)->base.profile_data)
 269
 270 } sim_cpu_base;
 271
 272
 273 /* Functions for allocating/freeing a sim_state.  */
 274 SIM_DESC sim_state_alloc PARAMS ((SIM_OPEN_KIND kind, host_callback *callback));
 275 void sim_state_free PARAMS ((SIM_DESC));
 276
 277
 278 #endif /* SIM_BASE_H */