sim/m32r/sim-if.c

   1 /* Main simulator entry points specific to the M32R.
   2    Copyright (C) 1996-2019 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 * const *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   /* The parser will print an error message for us, so we silently return.  */
  88   if (sim_parse_args (sd, argv) != SIM_RC_OK)
  89     {
  90       free_state (sd);
  91       return 0;
  92     }
  93
  94   /* Allocate a handler for the control registers and other devices
  95      if no memory for that range has been allocated by the user.
  96      All are allocated in one chunk to keep things from being
  97      unnecessarily complicated.
  98      TODO: Move these to the sim-model framework.  */
  99   sim_hw_parse (sd, "/core/%s/reg %#x %i", "m32r_uart", UART_BASE_ADDR, 0x100);
 100   sim_hw_parse (sd, "/core/%s/reg %#x %i", "m32r_cache", 0xfffffff0, 0x10);
 101
 102   /* Allocate core managed memory if none specified by user.
 103      Use address 4 here in case the user wanted address 0 unmapped.  */
 104   if (sim_core_read_buffer (sd, NULL, read_map, &c, 4, 1) == 0)
 105     sim_do_commandf (sd, "memory region 0,0x%x", M32R_DEFAULT_MEM_SIZE);
 106
 107   /* check for/establish the reference program image */
 108   if (sim_analyze_program (sd,
 109                            (STATE_PROG_ARGV (sd) != NULL
 110                             ? *STATE_PROG_ARGV (sd)
 111                             : NULL),
 112                            abfd) != SIM_RC_OK)
 113     {
 114       free_state (sd);
 115       return 0;
 116     }
 117
 118   /* Establish any remaining configuration options.  */
 119   if (sim_config (sd) != SIM_RC_OK)
 120     {
 121       free_state (sd);
 122       return 0;
 123     }
 124
 125   if (sim_post_argv_init (sd) != SIM_RC_OK)
 126     {
 127       free_state (sd);
 128       return 0;
 129     }
 130
 131   /* Open a copy of the cpu descriptor table.  */
 132   {
 133     CGEN_CPU_DESC cd = m32r_cgen_cpu_open_1 (STATE_ARCHITECTURE (sd)->printable_name,
 134                                              CGEN_ENDIAN_BIG);
 135     for (i = 0; i < MAX_NR_PROCESSORS; ++i)
 136       {
 137         SIM_CPU *cpu = STATE_CPU (sd, i);
 138         CPU_CPU_DESC (cpu) = cd;
 139         CPU_DISASSEMBLER (cpu) = sim_cgen_disassemble_insn;
 140       }
 141     m32r_cgen_init_dis (cd);
 142   }
 143
 144   /* Initialize various cgen things not done by common framework.
 145      Must be done after m32r_cgen_cpu_open.  */
 146   cgen_init (sd);
 147
 148   for (c = 0; c < MAX_NR_PROCESSORS; ++c)
 149     {
 150       /* Only needed for profiling, but the structure member is small.  */
 151       memset (CPU_M32R_MISC_PROFILE (STATE_CPU (sd, i)), 0,
 152               sizeof (* CPU_M32R_MISC_PROFILE (STATE_CPU (sd, i))));
 153       /* Hook in callback for reporting these stats */
 154       PROFILE_INFO_CPU_CALLBACK (CPU_PROFILE_DATA (STATE_CPU (sd, i)))
 155         = print_m32r_misc_cpu;
 156     }
 157
 158   return sd;
 159 }
 160 \f
 161 SIM_RC
 162 sim_create_inferior (sd, abfd, argv, envp)
 163      SIM_DESC sd;
 164      struct bfd *abfd;
 165      char * const *argv;
 166      char * const *envp;
 167 {
 168   SIM_CPU *current_cpu = STATE_CPU (sd, 0);
 169   SIM_ADDR addr;
 170
 171   if (abfd != NULL)
 172     addr = bfd_get_start_address (abfd);
 173   else
 174     addr = 0;
 175   sim_pc_set (current_cpu, addr);
 176
 177 #ifdef M32R_LINUX
 178   m32rbf_h_cr_set (current_cpu,
 179                     m32r_decode_gdb_ctrl_regnum(SPI_REGNUM), 0x1f00000);
 180   m32rbf_h_cr_set (current_cpu,
 181                     m32r_decode_gdb_ctrl_regnum(SPU_REGNUM), 0x1f00000);
 182 #endif
 183
 184   /* Standalone mode (i.e. `run`) will take care of the argv for us in
 185      sim_open() -> sim_parse_args().  But in debug mode (i.e. 'target sim'
 186      with `gdb`), we need to handle it because the user can change the
 187      argv on the fly via gdb's 'run'.  */
 188   if (STATE_PROG_ARGV (sd) != argv)
 189     {
 190       freeargv (STATE_PROG_ARGV (sd));
 191       STATE_PROG_ARGV (sd) = dupargv (argv);
 192     }
 193
 194   return SIM_RC_OK;
 195 }
 196
 197 /* PROFILE_CPU_CALLBACK */
 198
 199 static void
 200 print_m32r_misc_cpu (SIM_CPU *cpu, int verbose)
 201 {
 202   SIM_DESC sd = CPU_STATE (cpu);
 203   char buf[20];
 204
 205   if (CPU_PROFILE_FLAGS (cpu) [PROFILE_INSN_IDX])
 206     {
 207       sim_io_printf (sd, "Miscellaneous Statistics\n\n");
 208       sim_io_printf (sd, "  %-*s %s\n\n",
 209                      PROFILE_LABEL_WIDTH, "Fill nops:",
 210                      sim_add_commas (buf, sizeof (buf),
 211                                      CPU_M32R_MISC_PROFILE (cpu)->fillnop_count));
 212       if (STATE_ARCHITECTURE (sd)->mach == bfd_mach_m32rx)
 213         sim_io_printf (sd, "  %-*s %s\n\n",
 214                        PROFILE_LABEL_WIDTH, "Parallel insns:",
 215                        sim_add_commas (buf, sizeof (buf),
 216                                        CPU_M32R_MISC_PROFILE (cpu)->parallel_count));
 217       if (STATE_ARCHITECTURE (sd)->mach == bfd_mach_m32r2)
 218         sim_io_printf (sd, "  %-*s %s\n\n",
 219                        PROFILE_LABEL_WIDTH, "Parallel insns:",
 220                        sim_add_commas (buf, sizeof (buf),
 221                                        CPU_M32R_MISC_PROFILE (cpu)->parallel_count));
 222     }
 223 }