sim/common/sim-cpu.c

   1 /* CPU support.
   2    Copyright (C) 1998-2021 Free Software Foundation, Inc.
   3    Contributed by Cygnus Solutions.
   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 <stdlib.h>
  24
  25 #include "bfd.h"
  26
  27 #include "sim-main.h"
  28
  29 /* Allocate space for all cpus in the simulator.
  30    Space for the cpu must currently exist prior to parsing ARGV.  */
  31 /* ??? wip.  better solution must wait.  */
  32
  33 SIM_RC
  34 sim_cpu_alloc_all (SIM_DESC sd, int ncpus)
  35 {
  36   int c;
  37
  38   for (c = 0; c < ncpus; ++c)
  39     STATE_CPU (sd, c) = sim_cpu_alloc (sd);
  40   return SIM_RC_OK;
  41 }
  42
  43 /* Allocate space for a cpu object.
  44    EXTRA_BYTES is additional space to allocate for the sim_cpu struct.  */
  45
  46 sim_cpu *
  47 sim_cpu_alloc (SIM_DESC sd)
  48 {
  49   int extra_bytes = 0;
  50
  51 #ifdef CGEN_ARCH
  52   extra_bytes += cgen_cpu_max_extra_bytes (sd);
  53 #endif
  54
  55   return zalloc (sizeof (sim_cpu) + extra_bytes);
  56 }
  57
  58 /* Free all resources held by all cpus.  */
  59
  60 void
  61 sim_cpu_free_all (SIM_DESC sd)
  62 {
  63   int c;
  64
  65   for (c = 0; c < MAX_NR_PROCESSORS; ++c)
  66     if (STATE_CPU (sd, c))
  67       sim_cpu_free (STATE_CPU (sd, c));
  68 }
  69
  70 /* Free all resources used by CPU.  */
  71
  72 void
  73 sim_cpu_free (sim_cpu *cpu)
  74 {
  75   free (cpu);
  76 }
  77 \f
  78 /* PC utilities.  */
  79
  80 sim_cia
  81 sim_pc_get (sim_cpu *cpu)
  82 {
  83   return (* CPU_PC_FETCH (cpu)) (cpu);
  84 }
  85
  86 void
  87 sim_pc_set (sim_cpu *cpu, sim_cia newval)
  88 {
  89   (* CPU_PC_STORE (cpu)) (cpu, newval);
  90 }