sim/m32r/sim-if.c

   1 /* Main simulator entry points specific to the M32R.
   2    Copyright (C) 1996-2021 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 /* This must come before any other includes.  */
  21 #include "defs.h"
  22
  23 #include "sim-main.h"
  24 #include "sim-options.h"
  25 #include "libiberty.h"
  26 #include "bfd.h"
  27
  28 #include <string.h>
  29 #include <stdlib.h>
  30
  31 #include "dv-m32r_uart.h"
  32
  33 static void free_state (SIM_DESC);
  34 static void print_m32r_misc_cpu (SIM_CPU *cpu, int verbose);
  35 \f
  36 /* Cover function of sim_state_free to free the cpu buffers as well.  */
  37
  38 static void
  39 free_state (SIM_DESC sd)
  40 {
  41   if (STATE_MODULES (sd) != NULL)
  42     sim_module_uninstall (sd);
  43   sim_cpu_free_all (sd);
  44   sim_state_free (sd);
  45 }
  46
  47 /* Create an instance of the simulator.  */
  48
  49 SIM_DESC
  50 sim_open (SIM_OPEN_KIND kind, host_callback *callback, struct bfd *abfd,
  51           char * const *argv)
  52 {
  53   SIM_DESC sd = sim_state_alloc (kind, callback);
  54   char c;
  55   int i;
  56
  57   /* Set default options before parsing user options.  */
  58   current_alignment = STRICT_ALIGNMENT;
  59
  60   /* The cpu data is kept in a separately allocated chunk of memory.  */
  61   if (sim_cpu_alloc_all (sd, 1) != SIM_RC_OK)
  62     {
  63       free_state (sd);
  64       return 0;
  65     }
  66
  67   if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK)
  68     {
  69       free_state (sd);
  70       return 0;
  71     }
  72
  73   /* The parser will print an error message for us, so we silently return.  */
  74   if (sim_parse_args (sd, argv) != SIM_RC_OK)
  75     {
  76       free_state (sd);
  77       return 0;
  78     }
  79
  80   /* Allocate a handler for the control registers and other devices
  81      if no memory for that range has been allocated by the user.
  82      All are allocated in one chunk to keep things from being
  83      unnecessarily complicated.
  84      TODO: Move these to the sim-model framework.  */
  85   sim_hw_parse (sd, "/core/%s/reg %#x %i", "m32r_uart", UART_BASE_ADDR, 0x100);
  86   sim_hw_parse (sd, "/core/%s/reg %#x %i", "m32r_cache", 0xfffffff0, 0x10);
  87
  88   /* Allocate core managed memory if none specified by user.
  89      Use address 4 here in case the user wanted address 0 unmapped.  */
  90   if (sim_core_read_buffer (sd, NULL, read_map, &c, 4, 1) == 0)
  91     sim_do_commandf (sd, "memory region 0,0x%x", M32R_DEFAULT_MEM_SIZE);
  92
  93   /* check for/establish the reference program image */
  94   if (sim_analyze_program (sd,
  95                            (STATE_PROG_ARGV (sd) != NULL
  96                             ? *STATE_PROG_ARGV (sd)
  97                             : NULL),
  98                            abfd) != SIM_RC_OK)
  99     {
 100       free_state (sd);
 101       return 0;
 102     }
 103
 104   /* Establish any remaining configuration options.  */
 105   if (sim_config (sd) != SIM_RC_OK)
 106     {
 107       free_state (sd);
 108       return 0;
 109     }
 110
 111   if (sim_post_argv_init (sd) != SIM_RC_OK)
 112     {
 113       free_state (sd);
 114       return 0;
 115     }
 116
 117   /* Open a copy of the cpu descriptor table.  */
 118   {
 119     CGEN_CPU_DESC cd = m32r_cgen_cpu_open_1 (STATE_ARCHITECTURE (sd)->printable_name,
 120                                              CGEN_ENDIAN_BIG);
 121     for (i = 0; i < MAX_NR_PROCESSORS; ++i)
 122       {
 123         SIM_CPU *cpu = STATE_CPU (sd, i);
 124         CPU_CPU_DESC (cpu) = cd;
 125         CPU_DISASSEMBLER (cpu) = sim_cgen_disassemble_insn;
 126       }
 127     m32r_cgen_init_dis (cd);
 128   }
 129
 130   for (c = 0; c < MAX_NR_PROCESSORS; ++c)
 131     {
 132       /* Only needed for profiling, but the structure member is small.  */
 133       memset (CPU_M32R_MISC_PROFILE (STATE_CPU (sd, i)), 0,
 134               sizeof (* CPU_M32R_MISC_PROFILE (STATE_CPU (sd, i))));
 135       /* Hook in callback for reporting these stats */
 136       PROFILE_INFO_CPU_CALLBACK (CPU_PROFILE_DATA (STATE_CPU (sd, i)))
 137         = print_m32r_misc_cpu;
 138     }
 139
 140   return sd;
 141 }
 142 \f
 143 SIM_RC
 144 sim_create_inferior (SIM_DESC sd, struct bfd *abfd, char * const *argv,
 145                      char * const *envp)
 146 {
 147   SIM_CPU *current_cpu = STATE_CPU (sd, 0);
 148   SIM_ADDR addr;
 149
 150   if (abfd != NULL)
 151     addr = bfd_get_start_address (abfd);
 152   else
 153     addr = 0;
 154   sim_pc_set (current_cpu, addr);
 155
 156 #ifdef M32R_LINUX
 157   m32rbf_h_cr_set (current_cpu,
 158                     m32r_decode_gdb_ctrl_regnum(SPI_REGNUM), 0x1f00000);
 159   m32rbf_h_cr_set (current_cpu,
 160                     m32r_decode_gdb_ctrl_regnum(SPU_REGNUM), 0x1f00000);
 161 #endif
 162
 163   /* Standalone mode (i.e. `run`) will take care of the argv for us in
 164      sim_open() -> sim_parse_args().  But in debug mode (i.e. 'target sim'
 165      with `gdb`), we need to handle it because the user can change the
 166      argv on the fly via gdb's 'run'.  */
 167   if (STATE_PROG_ARGV (sd) != argv)
 168     {
 169       freeargv (STATE_PROG_ARGV (sd));
 170       STATE_PROG_ARGV (sd) = dupargv (argv);
 171     }
 172
 173   return SIM_RC_OK;
 174 }
 175
 176 /* PROFILE_CPU_CALLBACK */
 177
 178 static void
 179 print_m32r_misc_cpu (SIM_CPU *cpu, int verbose)
 180 {
 181   SIM_DESC sd = CPU_STATE (cpu);
 182   char buf[20];
 183
 184   if (CPU_PROFILE_FLAGS (cpu) [PROFILE_INSN_IDX])
 185     {
 186       sim_io_printf (sd, "Miscellaneous Statistics\n\n");
 187       sim_io_printf (sd, "  %-*s %s\n\n",
 188                      PROFILE_LABEL_WIDTH, "Fill nops:",
 189                      sim_add_commas (buf, sizeof (buf),
 190                                      CPU_M32R_MISC_PROFILE (cpu)->fillnop_count));
 191       if (STATE_ARCHITECTURE (sd)->mach == bfd_mach_m32rx)
 192         sim_io_printf (sd, "  %-*s %s\n\n",
 193                        PROFILE_LABEL_WIDTH, "Parallel insns:",
 194                        sim_add_commas (buf, sizeof (buf),
 195                                        CPU_M32R_MISC_PROFILE (cpu)->parallel_count));
 196       if (STATE_ARCHITECTURE (sd)->mach == bfd_mach_m32r2)
 197         sim_io_printf (sd, "  %-*s %s\n\n",
 198                        PROFILE_LABEL_WIDTH, "Parallel insns:",
 199                        sim_add_commas (buf, sizeof (buf),
 200                                        CPU_M32R_MISC_PROFILE (cpu)->parallel_count));
 201     }
 202 }