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 #include <stdlib.h>
  21
  22 #include "sim-main.h"
  23 #include "bfd.h"
  24
  25 /* Allocate space for all cpus in the simulator.
  26    Space for the cpu must currently exist prior to parsing ARGV.
  27    EXTRA_BYTES is additional space to allocate for the sim_cpu struct.  */
  28 /* ??? wip.  better solution must wait.  */
  29
  30 SIM_RC
  31 sim_cpu_alloc_all (SIM_DESC sd, int ncpus, int extra_bytes)
  32 {
  33   int c;
  34
  35   for (c = 0; c < ncpus; ++c)
  36     STATE_CPU (sd, c) = sim_cpu_alloc (sd, extra_bytes);
  37   return SIM_RC_OK;
  38 }
  39
  40 /* Allocate space for a cpu object.
  41    EXTRA_BYTES is additional space to allocate for the sim_cpu struct.  */
  42
  43 sim_cpu *
  44 sim_cpu_alloc (SIM_DESC sd, int extra_bytes)
  45 {
  46   return zalloc (sizeof (sim_cpu) + extra_bytes);
  47 }
  48
  49 /* Free all resources held by all cpus.  */
  50
  51 void
  52 sim_cpu_free_all (SIM_DESC sd)
  53 {
  54   int c;
  55
  56   for (c = 0; c < MAX_NR_PROCESSORS; ++c)
  57     if (STATE_CPU (sd, c))
  58       sim_cpu_free (STATE_CPU (sd, c));
  59 }
  60
  61 /* Free all resources used by CPU.  */
  62
  63 void
  64 sim_cpu_free (sim_cpu *cpu)
  65 {
  66   free (cpu);
  67 }
  68 \f
  69 /* PC utilities.  */
  70
  71 sim_cia
  72 sim_pc_get (sim_cpu *cpu)
  73 {
  74   return (* CPU_PC_FETCH (cpu)) (cpu);
  75 }
  76
  77 void
  78 sim_pc_set (sim_cpu *cpu, sim_cia newval)
  79 {
  80   (* CPU_PC_STORE (cpu)) (cpu, newval);
  81 }