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
  81
  82 /* Global pointer to current state while sim_resume is running.
  83    On a machine with lots of registers, it might be possible to reserve
  84    one of them for current_state.  However on a machine with few registers
  85    current_state can't permanently live in one and indirecting through it
  86    will be slower [in which case one can have sim_resume set globals from
  87    current_state for faster access].
  88    If CURRENT_STATE_REG is defined, it means current_state is living in
  89    a global register.  */
  90
  91
  92 #ifdef CURRENT_STATE_REG
  93 /* FIXME: wip */
  94 #else
  95 extern struct sim_state *current_state;
  96 #endif
  97
  98
  99 /* The simulator may provide different (and faster) definition.  */
 100 #ifndef CURRENT_STATE
 101 #define CURRENT_STATE current_state
 102 #endif
 103
 104
 105 typedef struct {
 106
 107   /* Simulator's argv[0].  */
 108   const char *my_name;
 109 #define STATE_MY_NAME(sd) ((sd)->base.my_name)
 110
 111   /* Who opened the simulator.  */
 112   SIM_OPEN_KIND open_kind;
 113 #define STATE_OPEN_KIND(sd) ((sd)->base.open_kind)
 114
 115   /* The host callbacks.  */
 116   struct host_callback_struct *callback;
 117 #define STATE_CALLBACK(sd) ((sd)->base.callback)
 118
 119 #if 0 /* FIXME: Not ready yet.  */
 120   /* Stuff defined in sim-config.h.  */
 121   struct sim_config config;
 122 #define STATE_CONFIG(sd) ((sd)->base.config)
 123 #endif
 124
 125   /* List of installed module `init' handlers.  */
 126   MODULE_INIT_LIST *init_list;
 127 #define STATE_INIT_LIST(sd) ((sd)->base.init_list)
 128   /* List of installed module `uninstall' handlers.  */
 129   MODULE_UNINSTALL_LIST *uninstall_list;
 130 #define STATE_UNINSTALL_LIST(sd) ((sd)->base.uninstall_list)
 131
 132   /* ??? This might be more appropriate in sim_cpu.  */
 133   /* Machine tables for this cpu.  See sim-model.h.  */
 134   const MODEL *model;
 135 #define STATE_MODEL(sd) ((sd)->base.model)
 136
 137   /* Supported options.  */
 138   struct option_list *options;
 139 #define STATE_OPTIONS(sd) ((sd)->base.options)
 140
 141   /* Non-zero if -v specified.  */
 142   int verbose_p;
 143 #define STATE_VERBOSE_P(sd) ((sd)->base.verbose_p)
 144
 145   /* If non NULL, the BFD architecture specified on the command line */
 146   const struct bfd_arch_info *architecture;
 147 #define STATE_ARCHITECTURE(sd) ((sd)->base.architecture)
 148
 149   /* If non NULL, the bfd target specified on the command line */
 150   const char *target;
 151 #define STATE_TARGET(sd) ((sd)->base.target)
 152
 153   /* In standalone simulator, this is the program's arguments passed
 154      on the command line.  */
 155   char **prog_argv;
 156 #define STATE_PROG_ARGV(sd) ((sd)->base.prog_argv)
 157
 158   /* The program's bfd.  */
 159   struct _bfd *prog_bfd;
 160 #define STATE_PROG_BFD(sd) ((sd)->base.prog_bfd)
 161
 162   /* The program's text section.  */
 163   struct sec *text_section;
 164   /* Starting and ending text section addresses from the bfd.  */
 165   SIM_ADDR text_start, text_end;
 166 #define STATE_TEXT_SECTION(sd) ((sd)->base.text_section)
 167 #define STATE_TEXT_START(sd) ((sd)->base.text_start)
 168 #define STATE_TEXT_END(sd) ((sd)->base.text_end)
 169
 170   /* Start address, set when the program is loaded from the bfd.  */
 171   SIM_ADDR start_addr;
 172 #define STATE_START_ADDR(sd) ((sd)->base.start_addr)
 173
 174 #if WITH_SCACHE
 175   /* Size of the simulator's cache, if any.
 176      This is not the target's cache.  It is the cache the simulator uses
 177      to process instructions.  */
 178   unsigned int scache_size;
 179 #define STATE_SCACHE_SIZE(sd) ((sd)->base.scache_size)
 180 #endif
 181
 182   /* FIXME: Move to top level sim_state struct (as some struct)?  */
 183 #ifdef SIM_HAVE_FLATMEM
 184   unsigned int mem_size;
 185 #define STATE_MEM_SIZE(sd) ((sd)->base.mem_size)
 186   unsigned int mem_base;
 187 #define STATE_MEM_BASE(sd) ((sd)->base.mem_base)
 188   unsigned char *memory;
 189 #define STATE_MEMORY(sd) ((sd)->base.memory)
 190 #endif
 191
 192   /* core memory bus */
 193 #define STATE_CORE(sd) (&(sd)->base.core)
 194   sim_core core;
 195
 196   /* event handler */
 197 #define STATE_EVENTS(sd) (&(sd)->base.events)
 198   sim_events events;
 199
 200   /* generic halt/resume engine */
 201   sim_engine engine;
 202 #define STATE_ENGINE(sd) (&(sd)->base.engine)
 203
 204   /* generic watchpoint support */
 205   sim_watchpoints watchpoints;
 206 #define STATE_WATCHPOINTS(sd) (&(sd)->base.watchpoints)
 207
 208   /* Marker for those wanting to do sanity checks.
 209      This should remain the last member of this struct to help catch
 210      miscompilation errors.  */
 211   int magic;
 212 #define SIM_MAGIC_NUMBER 0x4242
 213 #define STATE_MAGIC(sd) ((sd)->base.magic)
 214
 215 } sim_state_base;
 216
 217
 218 /* Pseudo baseclass for each cpu.  */
 219
 220 typedef struct {
 221
 222   /* Backlink to main state struct.  */
 223   SIM_DESC state;
 224 #define CPU_STATE(cpu) ((cpu)->base.state)
 225
 226   /* Processor specific core data */
 227   sim_cpu_core core;
 228 #define CPU_CORE(cpu) (& (cpu)->base.core)
 229
 230   /* Trace data.  See sim-trace.h.  */
 231   TRACE_DATA trace_data;
 232 #define CPU_TRACE_DATA(cpu) (& (cpu)->base.trace_data)
 233
 234   /* Maximum number of debuggable entities.
 235      This debugging is not intended for normal use.
 236      It is only enabled when the simulator is configured with --with-debug
 237      which shouldn't normally be specified.  */
 238 #ifndef MAX_DEBUG_VALUES
 239 #define MAX_DEBUG_VALUES 4
 240 #endif
 241
 242   /* Boolean array of specified debugging flags.  */
 243   char debug_flags[MAX_DEBUG_VALUES];
 244 #define CPU_DEBUG_FLAGS(cpu) ((cpu)->base.debug_flags)
 245   /* Standard values.  */
 246 #define DEBUG_INSN_IDX 0
 247 #define DEBUG_NEXT_IDX 2 /* simulator specific debug bits begin here */
 248
 249   /* Debugging output goes to this or stderr if NULL.
 250      We can't store `stderr' here as stderr goes through a callback.  */
 251   FILE *debug_file;
 252 #define CPU_DEBUG_FILE(cpu) ((cpu)->base.debug_file)
 253
 254   /* Profile data.  See sim-profile.h.  */
 255   PROFILE_DATA profile_data;
 256 #define CPU_PROFILE_DATA(cpu) (& (cpu)->base.profile_data)
 257
 258 } sim_cpu_base;
 259
 260
 261 /* Functions for allocating/freeing a sim_state.  */
 262 SIM_DESC sim_state_alloc PARAMS ((SIM_OPEN_KIND kind, host_callback *callback));
 263 void sim_state_free PARAMS ((SIM_DESC));
 264
 265
 266 #endif /* SIM_BASE_H */