sim/m32r/sim-if.c

   1 /* Main simulator entry points specific to the M32R.
   2    Copyright (C) 1996-2016 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 3 of the License, or
  10    (at your option) 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
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include "sim-main.h"
  21 #include "sim-options.h"
  22 #include "libiberty.h"
  23 #include "bfd.h"
  24
  25 #ifdef HAVE_STRING_H
  26 #include <string.h>
  27 #else
  28 #ifdef HAVE_STRINGS_H
  29 #include <strings.h>
  30 #endif
  31 #endif
  32 #ifdef HAVE_STDLIB_H
  33 #include <stdlib.h>
  34 #endif
  35
  36 #include "dv-m32r_uart.h"
  37
  38 static void free_state (SIM_DESC);
  39 static void print_m32r_misc_cpu (SIM_CPU *cpu, int verbose);
  40 \f
  41 /* Cover function of sim_state_free to free the cpu buffers as well.  */
  42
  43 static void
  44 free_state (SIM_DESC sd)
  45 {
  46   if (STATE_MODULES (sd) != NULL)
  47     sim_module_uninstall (sd);
  48   sim_cpu_free_all (sd);
  49   sim_state_free (sd);
  50 }
  51
  52 /* Create an instance of the simulator.  */
  53
  54 SIM_DESC
  55 sim_open (kind, callback, abfd, argv)
  56      SIM_OPEN_KIND kind;
  57      host_callback *callback;
  58      struct bfd *abfd;
  59      char **argv;
  60 {
  61   SIM_DESC sd = sim_state_alloc (kind, callback);
  62   char c;
  63   int i;
  64
  65   /* The cpu data is kept in a separately allocated chunk of memory.  */
  66   if (sim_cpu_alloc_all (sd, 1, cgen_cpu_max_extra_bytes ()) != SIM_RC_OK)
  67     {
  68       free_state (sd);
  69       return 0;
  70     }
  71
  72 #if 0 /* FIXME: pc is in mach-specific struct */
  73   /* FIXME: watchpoints code shouldn't need this */
  74   {
  75     SIM_CPU *current_cpu = STATE_CPU (sd, 0);
  76     STATE_WATCHPOINTS (sd)->pc = &(PC);
  77     STATE_WATCHPOINTS (sd)->sizeof_pc = sizeof (PC);
  78   }
  79 #endif
  80
  81   if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK)
  82     {
  83       free_state (sd);
  84       return 0;
  85     }
  86
  87   /* getopt will print the error message so we just have to exit if this fails.
  88      FIXME: Hmmm...  in the case of gdb we need getopt to call
  89      print_filtered.  */
  90   if (sim_parse_args (sd, argv) != SIM_RC_OK)
  91     {
  92       free_state (sd);
  93       return 0;
  94     }
  95
  96   /* Allocate a handler for the control registers and other devices
  97      if no memory for that range has been allocated by the user.
  98      All are allocated in one chunk to keep things from being
  99      unnecessarily complicated.
 100      TODO: Move these to the sim-model framework.  */
 101   sim_hw_parse (sd, "/core/%s/reg %#x %i", "m32r_uart", UART_BASE_ADDR, 0x100);
 102   sim_hw_parse (sd, "/core/%s/reg %#x %i", "m32r_cache", 0xfffffff0, 0x10);
 103
 104   /* Allocate core managed memory if none specified by user.
 105      Use address 4 here in case the user wanted address 0 unmapped.  */
 106   if (sim_core_read_buffer (sd, NULL, read_map, &c, 4, 1) == 0)
 107     sim_do_commandf (sd, "memory region 0,0x%x", M32R_DEFAULT_MEM_SIZE);
 108
 109   /* check for/establish the reference program image */
 110   if (sim_analyze_program (sd,
 111                            (STATE_PROG_ARGV (sd) != NULL
 112                             ? *STATE_PROG_ARGV (sd)
 113                             : NULL),
 114                            abfd) != SIM_RC_OK)
 115     {
 116       free_state (sd);
 117       return 0;
 118     }
 119
 120   /* Establish any remaining configuration options.  */
 121   if (sim_config (sd) != SIM_RC_OK)
 122     {
 123       free_state (sd);
 124       return 0;
 125     }
 126
 127   if (sim_post_argv_init (sd) != SIM_RC_OK)
 128     {
 129       free_state (sd);
 130       return 0;
 131     }
 132
 133   /* Open a copy of the cpu descriptor table.  */
 134   {
 135     CGEN_CPU_DESC cd = m32r_cgen_cpu_open_1 (STATE_ARCHITECTURE (sd)->printable_name,
 136                                              CGEN_ENDIAN_BIG);
 137     for (i = 0; i < MAX_NR_PROCESSORS; ++i)
 138       {
 139         SIM_CPU *cpu = STATE_CPU (sd, i);
 140         CPU_CPU_DESC (cpu) = cd;
 141         CPU_DISASSEMBLER (cpu) = sim_cgen_disassemble_insn;
 142       }
 143     m32r_cgen_init_dis (cd);
 144   }
 145
 146   /* Initialize various cgen things not done by common framework.
 147      Must be done after m32r_cgen_cpu_open.  */
 148   cgen_init (sd);
 149
 150   for (c = 0; c < MAX_NR_PROCESSORS; ++c)
 151     {
 152       /* Only needed for profiling, but the structure member is small.  */
 153       memset (CPU_M32R_MISC_PROFILE (STATE_CPU (sd, i)), 0,
 154               sizeof (* CPU_M32R_MISC_PROFILE (STATE_CPU (sd, i))));
 155       /* Hook in callback for reporting these stats */
 156       PROFILE_INFO_CPU_CALLBACK (CPU_PROFILE_DATA (STATE_CPU (sd, i)))
 157         = print_m32r_misc_cpu;
 158     }
 159
 160   return sd;
 161 }
 162 \f
 163 SIM_RC
 164 sim_create_inferior (sd, abfd, argv, envp)
 165      SIM_DESC sd;
 166      struct bfd *abfd;
 167      char **argv;
 168      char **envp;
 169 {
 170   SIM_CPU *current_cpu = STATE_CPU (sd, 0);
 171   SIM_ADDR addr;
 172
 173   if (abfd != NULL)
 174     addr = bfd_get_start_address (abfd);
 175   else
 176     addr = 0;
 177   sim_pc_set (current_cpu, addr);
 178
 179 #ifdef M32R_LINUX
 180   m32rbf_h_cr_set (current_cpu,
 181                     m32r_decode_gdb_ctrl_regnum(SPI_REGNUM), 0x1f00000);
 182   m32rbf_h_cr_set (current_cpu,
 183                     m32r_decode_gdb_ctrl_regnum(SPU_REGNUM), 0x1f00000);
 184 #endif
 185
 186   /* Standalone mode (i.e. `run`) will take care of the argv for us in
 187      sim_open() -> sim_parse_args().  But in debug mode (i.e. 'target sim'
 188      with `gdb`), we need to handle it because the user can change the
 189      argv on the fly via gdb's 'run'.  */
 190   if (STATE_PROG_ARGV (sd) != argv)
 191     {
 192       freeargv (STATE_PROG_ARGV (sd));
 193       STATE_PROG_ARGV (sd) = dupargv (argv);
 194     }
 195
 196   return SIM_RC_OK;
 197 }
 198
 199 /* PROFILE_CPU_CALLBACK */
 200
 201 static void
 202 print_m32r_misc_cpu (SIM_CPU *cpu, int verbose)
 203 {
 204   SIM_DESC sd = CPU_STATE (cpu);
 205   char buf[20];
 206
 207   if (CPU_PROFILE_FLAGS (cpu) [PROFILE_INSN_IDX])
 208     {
 209       sim_io_printf (sd, "Miscellaneous Statistics\n\n");
 210       sim_io_printf (sd, "  %-*s %s\n\n",
 211                      PROFILE_LABEL_WIDTH, "Fill nops:",
 212                      sim_add_commas (buf, sizeof (buf),
 213                                      CPU_M32R_MISC_PROFILE (cpu)->fillnop_count));
 214       if (STATE_ARCHITECTURE (sd)->mach == bfd_mach_m32rx)
 215         sim_io_printf (sd, "  %-*s %s\n\n",
 216                        PROFILE_LABEL_WIDTH, "Parallel insns:",
 217                        sim_add_commas (buf, sizeof (buf),
 218                                        CPU_M32R_MISC_PROFILE (cpu)->parallel_count));
 219       if (STATE_ARCHITECTURE (sd)->mach == bfd_mach_m32r2)
 220         sim_io_printf (sd, "  %-*s %s\n\n",
 221                        PROFILE_LABEL_WIDTH, "Parallel insns:",
 222                        sim_add_commas (buf, sizeof (buf),
 223                                        CPU_M32R_MISC_PROFILE (cpu)->parallel_count));
 224     }
 225 }